1 | //===-- Testx86AssemblyInspectionEngine.cpp -------------------------------===// |
2 | |
3 | // |
4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | // See https://llvm.org/LICENSE.txt for license information. |
6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | #include "gtest/gtest.h" |
11 | |
12 | #include <memory> |
13 | #include <vector> |
14 | |
15 | #include "Plugins/UnwindAssembly/x86/x86AssemblyInspectionEngine.h" |
16 | #include "lldb/Core/Address.h" |
17 | #include "lldb/Core/AddressRange.h" |
18 | #include "lldb/Symbol/UnwindPlan.h" |
19 | #include "lldb/Utility/ArchSpec.h" |
20 | #include "lldb/Utility/StreamString.h" |
21 | |
22 | #include "llvm/Support/TargetSelect.h" |
23 | |
24 | using namespace lldb; |
25 | using namespace lldb_private; |
26 | |
27 | class Testx86AssemblyInspectionEngine : public testing::Test { |
28 | public: |
29 | static void SetUpTestCase(); |
30 | |
31 | // static void TearDownTestCase() { } |
32 | |
33 | // virtual void SetUp() override { } |
34 | |
35 | // virtual void TearDown() override { } |
36 | |
37 | protected: |
38 | }; |
39 | |
40 | void Testx86AssemblyInspectionEngine::SetUpTestCase() { |
41 | llvm::InitializeAllTargets(); |
42 | llvm::InitializeAllAsmPrinters(); |
43 | llvm::InitializeAllTargetMCs(); |
44 | llvm::InitializeAllDisassemblers(); |
45 | } |
46 | |
47 | // only defining the register names / numbers that the unwinder is actually |
48 | // using today |
49 | |
50 | // names should match the constants below. These will be the eRegisterKindLLDB |
51 | // register numbers. |
52 | |
53 | const char *x86_64_reg_names[] = {"rax" , "rbx" , "rcx" , "rdx" , "rsp" , "rbp" , |
54 | "rsi" , "rdi" , "r8" , "r9" , "r10" , "r11" , |
55 | "r12" , "r13" , "r14" , "r15" , "rip" }; |
56 | |
57 | enum x86_64_regs { |
58 | k_rax = 0, |
59 | k_rbx = 1, |
60 | k_rcx = 2, |
61 | k_rdx = 3, |
62 | k_rsp = 4, |
63 | k_rbp = 5, |
64 | k_rsi = 6, |
65 | k_rdi = 7, |
66 | k_r8 = 8, |
67 | k_r9 = 9, |
68 | k_r10 = 10, |
69 | k_r11 = 11, |
70 | k_r12 = 12, |
71 | k_r13 = 13, |
72 | k_r14 = 14, |
73 | k_r15 = 15, |
74 | k_rip = 16 |
75 | }; |
76 | |
77 | // names should match the constants below. These will be the eRegisterKindLLDB |
78 | // register numbers. |
79 | |
80 | const char *i386_reg_names[] = {"eax" , "ecx" , "edx" , "ebx" , "esp" , |
81 | "ebp" , "esi" , "edi" , "eip" }; |
82 | |
83 | enum i386_regs { |
84 | k_eax = 0, |
85 | k_ecx = 1, |
86 | k_edx = 2, |
87 | k_ebx = 3, |
88 | k_esp = 4, |
89 | k_ebp = 5, |
90 | k_esi = 6, |
91 | k_edi = 7, |
92 | k_eip = 8 |
93 | }; |
94 | |
95 | std::unique_ptr<x86AssemblyInspectionEngine> Getx86_64Inspector() { |
96 | |
97 | ArchSpec arch("x86_64-apple-macosx" ); |
98 | std::unique_ptr<x86AssemblyInspectionEngine> engine( |
99 | new x86AssemblyInspectionEngine(arch)); |
100 | |
101 | std::vector<x86AssemblyInspectionEngine::lldb_reg_info> lldb_regnums; |
102 | int i = 0; |
103 | for (const auto &name : x86_64_reg_names) { |
104 | x86AssemblyInspectionEngine::lldb_reg_info ri; |
105 | ri.name = name; |
106 | ri.lldb_regnum = i++; |
107 | lldb_regnums.push_back(x: ri); |
108 | } |
109 | |
110 | engine->Initialize(reg_info&: lldb_regnums); |
111 | return engine; |
112 | } |
113 | |
114 | std::unique_ptr<x86AssemblyInspectionEngine> Geti386Inspector() { |
115 | |
116 | ArchSpec arch("i386-apple-macosx" ); |
117 | std::unique_ptr<x86AssemblyInspectionEngine> engine( |
118 | new x86AssemblyInspectionEngine(arch)); |
119 | |
120 | std::vector<x86AssemblyInspectionEngine::lldb_reg_info> lldb_regnums; |
121 | int i = 0; |
122 | for (const auto &name : i386_reg_names) { |
123 | x86AssemblyInspectionEngine::lldb_reg_info ri; |
124 | ri.name = name; |
125 | ri.lldb_regnum = i++; |
126 | lldb_regnums.push_back(x: ri); |
127 | } |
128 | |
129 | engine->Initialize(reg_info&: lldb_regnums); |
130 | return engine; |
131 | } |
132 | |
133 | namespace lldb_private { |
134 | static std::ostream &operator<<(std::ostream &OS, |
135 | const UnwindPlan::Row::FAValue &CFA) { |
136 | StreamString S; |
137 | CFA.Dump(s&: S, unwind_plan: nullptr, thread: nullptr); |
138 | return OS << S.GetData(); |
139 | } |
140 | } // namespace lldb_private |
141 | |
142 | TEST_F(Testx86AssemblyInspectionEngine, TestSimple64bitFrameFunction) { |
143 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
144 | |
145 | // 'int main() { }' compiled for x86_64-apple-macosx with clang |
146 | uint8_t data[] = { |
147 | 0x55, // offset 0 -- pushq %rbp |
148 | 0x48, 0x89, 0xe5, // offset 1 -- movq %rsp, %rbp |
149 | 0x31, 0xc0, // offset 4 -- xorl %eax, %eax |
150 | 0x5d, // offset 6 -- popq %rbp |
151 | 0xc3 // offset 7 -- retq |
152 | }; |
153 | |
154 | AddressRange sample_range(0x1000, sizeof(data)); |
155 | |
156 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
157 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
158 | data, sizeof(data), sample_range, unwind_plan)); |
159 | |
160 | // Expect four unwind rows: |
161 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
162 | // 1: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
163 | // 4: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
164 | // 7: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
165 | |
166 | EXPECT_TRUE(unwind_plan.GetInitialCFARegister() == k_rsp); |
167 | EXPECT_TRUE(unwind_plan.GetUnwindPlanValidAtAllInstructions() == |
168 | eLazyBoolYes); |
169 | EXPECT_TRUE(unwind_plan.GetSourcedFromCompiler() == eLazyBoolNo); |
170 | |
171 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
172 | |
173 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
174 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 0); |
175 | EXPECT_EQ(0, row->GetOffset()); |
176 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
177 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
178 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
179 | |
180 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
181 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
182 | EXPECT_EQ(-8, regloc.GetOffset()); |
183 | |
184 | // 1: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
185 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
186 | EXPECT_EQ(1, row->GetOffset()); |
187 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
188 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
189 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
190 | |
191 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
192 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
193 | EXPECT_EQ(-8, regloc.GetOffset()); |
194 | |
195 | // 4: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
196 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
197 | EXPECT_EQ(4, row->GetOffset()); |
198 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
199 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
200 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
201 | |
202 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
203 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
204 | EXPECT_EQ(-8, regloc.GetOffset()); |
205 | |
206 | // 7: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
207 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
208 | EXPECT_EQ(7, row->GetOffset()); |
209 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
210 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
211 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
212 | |
213 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
214 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
215 | EXPECT_EQ(-8, regloc.GetOffset()); |
216 | } |
217 | |
218 | TEST_F(Testx86AssemblyInspectionEngine, TestSimple32bitFrameFunction) { |
219 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
220 | |
221 | // 'int main() { }' compiled for i386-apple-macosx with clang |
222 | uint8_t data[] = { |
223 | 0x55, // offset 0 -- pushl %ebp |
224 | 0x89, 0xe5, // offset 1 -- movl %esp, %ebp |
225 | 0x31, 0xc0, // offset 3 -- xorl %eax, %eax |
226 | 0x5d, // offset 5 -- popl %ebp |
227 | 0xc3 // offset 6 -- retl |
228 | }; |
229 | |
230 | AddressRange sample_range(0x1000, sizeof(data)); |
231 | |
232 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
233 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
234 | data, sizeof(data), sample_range, unwind_plan)); |
235 | |
236 | // Expect four unwind rows: |
237 | // 0: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
238 | // 1: CFA=esp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
239 | // 3: CFA=ebp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
240 | // 6: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
241 | |
242 | EXPECT_TRUE(unwind_plan.GetInitialCFARegister() == k_esp); |
243 | EXPECT_TRUE(unwind_plan.GetUnwindPlanValidAtAllInstructions() == |
244 | eLazyBoolYes); |
245 | EXPECT_TRUE(unwind_plan.GetSourcedFromCompiler() == eLazyBoolNo); |
246 | |
247 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
248 | |
249 | // offset 0 -- pushl %ebp |
250 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 0); |
251 | EXPECT_EQ(0, row->GetOffset()); |
252 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
253 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
254 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
255 | |
256 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
257 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
258 | EXPECT_TRUE(regloc.GetOffset() == -4); |
259 | |
260 | // 1: CFA=esp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
261 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
262 | EXPECT_EQ(1, row->GetOffset()); |
263 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
264 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
265 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
266 | |
267 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
268 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
269 | EXPECT_EQ(-4, regloc.GetOffset()); |
270 | |
271 | // 3: CFA=ebp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
272 | row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
273 | EXPECT_EQ(3, row->GetOffset()); |
274 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_ebp); |
275 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
276 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
277 | |
278 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
279 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
280 | EXPECT_EQ(-4, regloc.GetOffset()); |
281 | |
282 | // 6: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
283 | row = unwind_plan.GetRowForFunctionOffset(offset: 6); |
284 | EXPECT_EQ(6, row->GetOffset()); |
285 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
286 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
287 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
288 | |
289 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
290 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
291 | EXPECT_EQ(-4, regloc.GetOffset()); |
292 | } |
293 | |
294 | TEST_F(Testx86AssemblyInspectionEngine, Test64bitFramelessBigStackFrame) { |
295 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
296 | |
297 | // this source file: |
298 | // |
299 | // #include <stdio.h> |
300 | // int main (int argc, char **argv) |
301 | // { |
302 | // |
303 | // const int arrsize = 60; |
304 | // int buf[arrsize * arrsize]; |
305 | // int accum = argc; |
306 | // for (int i = 0; i < arrsize; i++) |
307 | // for (int j = 0; j < arrsize; j++) |
308 | // { |
309 | // if (i > 0 && j > 0) |
310 | // { |
311 | // int n = buf[(i-1) * (j-1)] * 2; |
312 | // int m = buf[(i-1) * (j-1)] / 2; |
313 | // int j = buf[(i-1) * (j-1)] + 2; |
314 | // int k = buf[(i-1) * (j-1)] - 2; |
315 | // printf ("%d ", n + m + j + k); |
316 | // buf[(i-1) * (j-1)] += n - m + j - k; |
317 | // } |
318 | // buf[i*j] = accum++; |
319 | // } |
320 | // |
321 | // return buf[(arrsize * arrsize) - 2] + printf ("%d\n", buf[(arrsize * |
322 | // arrsize) - 3]); |
323 | // } |
324 | // |
325 | // compiled 'clang -fomit-frame-pointer -Os' for x86_64-apple-macosx |
326 | |
327 | uint8_t data[] = { |
328 | 0x55, // offset 0 -- pushq %rbp |
329 | 0x41, 0x57, // offset 1 -- pushq %r15 |
330 | 0x41, 0x56, // offset 3 -- pushq %r14 |
331 | 0x41, 0x55, // offset 5 -- pushq %r13 |
332 | 0x41, 0x54, // offset 7 -- pushq %r12 |
333 | 0x53, // offset 9 -- pushq %rbx |
334 | 0x48, 0x81, 0xec, 0x68, 0x38, 0x00, |
335 | 0x00, // offset 10 -- subq $0x3868, %rsp |
336 | |
337 | // .... |
338 | |
339 | 0x48, 0x81, 0xc4, 0x68, 0x38, 0x00, |
340 | 0x00, // offset 17 -- addq $0x3868, %rsp |
341 | 0x5b, // offset 24 -- popq %rbx |
342 | 0x41, 0x5c, // offset 25 -- popq %r12 |
343 | 0x41, 0x5d, // offset 27 -- popq %r13 |
344 | 0x41, 0x5e, // offset 29 -- popq %r14 |
345 | 0x41, 0x5f, // offset 31 -- popq %r15 |
346 | 0x5d, // offset 33 -- popq %rbp |
347 | 0xc3, // offset 34 -- retq |
348 | 0xe8, 0x12, 0x34, 0x56, 0x78 // offset 35 -- callq whatever |
349 | }; |
350 | |
351 | AddressRange sample_range(0x1000, sizeof(data)); |
352 | |
353 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
354 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
355 | data, sizeof(data), sample_range, unwind_plan)); |
356 | |
357 | // Unwind rules should look like |
358 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
359 | // 1: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
360 | // 3: CFA=rsp+24 => rbp=[CFA-16] rsp=CFA+0 r15=[CFA-24] rip=[CFA-8] |
361 | // 5: CFA=rsp+32 => rbp=[CFA-16] rsp=CFA+0 r14=[CFA-32] r15=[CFA-24] |
362 | // rip=[CFA-8 |
363 | // 7: CFA=rsp+40 => rbp=[CFA-16] rsp=CFA+0 r13=[CFA-40] r14=[CFA-32] |
364 | // r15=[CFA-24] rip=[CFA-8] |
365 | // 9: CFA=rsp+48 => rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] r13=[CFA-40] |
366 | // r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
367 | // 10: CFA=rsp+56 => rbx=[CFA-56] rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] |
368 | // r13=[CFA-40] r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
369 | // 17: CFA=rsp+14496 => rbx=[CFA-56] rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] |
370 | // r13=[CFA-40] r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
371 | |
372 | // 24: CFA=rsp+56 => rbx=[CFA-56] rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] |
373 | // r13=[CFA-40] r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
374 | // 25: CFA=rsp+48 => rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] r13=[CFA-40] |
375 | // r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
376 | // 27: CFA=rsp+40 => rbp=[CFA-16] rsp=CFA+0 r13=[CFA-40] r14=[CFA-32] |
377 | // r15=[CFA-24] rip=[CFA-8] |
378 | // 29: CFA=rsp+32 => rbp=[CFA-16] rsp=CFA+0 r14=[CFA-32] r15=[CFA-24] |
379 | // rip=[CFA-8] |
380 | // 31: CFA=rsp+24 => rbp=[CFA-16] rsp=CFA+0 r15=[CFA-24] rip=[CFA-8] |
381 | // 33: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
382 | // 34: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
383 | |
384 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
385 | |
386 | // grab the Row for when the prologue has finished executing: |
387 | // 17: CFA=rsp+14496 => rbx=[CFA-56] rbp=[CFA-16] rsp=CFA+0 r12=[CFA-48] |
388 | // r13=[CFA-40] r14=[CFA-32] r15=[CFA-24] rip=[CFA-8] |
389 | |
390 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 17); |
391 | |
392 | EXPECT_EQ(17, row->GetOffset()); |
393 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
394 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
395 | EXPECT_EQ(14496, row->GetCFAValue().GetOffset()); |
396 | |
397 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
398 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
399 | EXPECT_EQ(-8, regloc.GetOffset()); |
400 | |
401 | EXPECT_TRUE(row->GetRegisterInfo(k_rbp, regloc)); |
402 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
403 | EXPECT_EQ(-16, regloc.GetOffset()); |
404 | |
405 | EXPECT_TRUE(row->GetRegisterInfo(k_r15, regloc)); |
406 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
407 | EXPECT_EQ(-24, regloc.GetOffset()); |
408 | |
409 | EXPECT_TRUE(row->GetRegisterInfo(k_r14, regloc)); |
410 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
411 | EXPECT_EQ(-32, regloc.GetOffset()); |
412 | |
413 | EXPECT_TRUE(row->GetRegisterInfo(k_r13, regloc)); |
414 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
415 | EXPECT_EQ(-40, regloc.GetOffset()); |
416 | |
417 | EXPECT_TRUE(row->GetRegisterInfo(k_r12, regloc)); |
418 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
419 | EXPECT_EQ(-48, regloc.GetOffset()); |
420 | |
421 | EXPECT_TRUE(row->GetRegisterInfo(k_rbx, regloc)); |
422 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
423 | EXPECT_EQ(-56, regloc.GetOffset()); |
424 | |
425 | // grab the Row for when the epilogue has finished executing: |
426 | // 34: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
427 | |
428 | row = unwind_plan.GetRowForFunctionOffset(offset: 34); |
429 | |
430 | EXPECT_EQ(34, row->GetOffset()); |
431 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
432 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
433 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
434 | |
435 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
436 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
437 | EXPECT_EQ(-8, regloc.GetOffset()); |
438 | |
439 | // these could be set to IsSame and be valid -- meaning that the |
440 | // register value is the same as the caller's -- but I'd rather |
441 | // they not be mentioned at all. |
442 | |
443 | EXPECT_FALSE(row->GetRegisterInfo(k_rax, regloc)); |
444 | EXPECT_FALSE(row->GetRegisterInfo(k_rbx, regloc)); |
445 | EXPECT_FALSE(row->GetRegisterInfo(k_rcx, regloc)); |
446 | EXPECT_FALSE(row->GetRegisterInfo(k_rdx, regloc)); |
447 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
448 | EXPECT_FALSE(row->GetRegisterInfo(k_rsi, regloc)); |
449 | EXPECT_FALSE(row->GetRegisterInfo(k_rdi, regloc)); |
450 | EXPECT_FALSE(row->GetRegisterInfo(k_r8, regloc)); |
451 | EXPECT_FALSE(row->GetRegisterInfo(k_r9, regloc)); |
452 | EXPECT_FALSE(row->GetRegisterInfo(k_r10, regloc)); |
453 | EXPECT_FALSE(row->GetRegisterInfo(k_r11, regloc)); |
454 | EXPECT_FALSE(row->GetRegisterInfo(k_r12, regloc)); |
455 | EXPECT_FALSE(row->GetRegisterInfo(k_r13, regloc)); |
456 | EXPECT_FALSE(row->GetRegisterInfo(k_r14, regloc)); |
457 | EXPECT_FALSE(row->GetRegisterInfo(k_r15, regloc)); |
458 | } |
459 | |
460 | TEST_F(Testx86AssemblyInspectionEngine, Test32bitFramelessBigStackFrame) { |
461 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
462 | |
463 | // this source file: |
464 | // |
465 | // #include <stdio.h> |
466 | // int main (int argc, char **argv) |
467 | // { |
468 | // |
469 | // const int arrsize = 60; |
470 | // int buf[arrsize * arrsize]; |
471 | // int accum = argc; |
472 | // for (int i = 0; i < arrsize; i++) |
473 | // for (int j = 0; j < arrsize; j++) |
474 | // { |
475 | // if (i > 0 && j > 0) |
476 | // { |
477 | // int n = buf[(i-1) * (j-1)] * 2; |
478 | // int m = buf[(i-1) * (j-1)] / 2; |
479 | // int j = buf[(i-1) * (j-1)] + 2; |
480 | // int k = buf[(i-1) * (j-1)] - 2; |
481 | // printf ("%d ", n + m + j + k); |
482 | // buf[(i-1) * (j-1)] += n - m + j - k; |
483 | // } |
484 | // buf[i*j] = accum++; |
485 | // } |
486 | // |
487 | // return buf[(arrsize * arrsize) - 2] + printf ("%d\n", buf[(arrsize * |
488 | // arrsize) - 3]); |
489 | // } |
490 | // |
491 | // compiled 'clang -arch i386 -fomit-frame-pointer -Os' for i386-apple-macosx |
492 | |
493 | // simplified assembly version of the above function, which is used as the |
494 | // input |
495 | // data: |
496 | // |
497 | // .section __TEXT,__text,regular,pure_instructions |
498 | // .macosx_version_min 10, 12 |
499 | // .globl _main |
500 | // .align 4, 0x90 |
501 | // _main: ## @main |
502 | // ## BB#0: |
503 | // pushl %ebp |
504 | // pushl %ebx |
505 | // pushl %edi |
506 | // pushl %esi |
507 | // L0$pb: |
508 | // subl $0x386c, %esp |
509 | // calll L1 |
510 | // L1: |
511 | // popl %ecx |
512 | // movl %ecx, 0x8(%esp) |
513 | // subl $0x8, %esp |
514 | // pushl %eax |
515 | // pushl 0x20(%esp) |
516 | // calll _puts |
517 | // addl $0x10, %esp |
518 | // incl %ebx |
519 | // addl $0x386c, %esp |
520 | // popl %esi |
521 | // popl %edi |
522 | // popl %ebx |
523 | // popl %ebp |
524 | // retl |
525 | // |
526 | // .section __TEXT,__cstring,cstring_literals |
527 | // L_.str: ## @.str |
528 | // .asciz "HI" |
529 | // |
530 | // |
531 | // .subsections_via_symbols |
532 | |
533 | uint8_t data[] = { |
534 | 0x55, |
535 | // offset 0 -- pushl %ebp |
536 | |
537 | 0x53, |
538 | // offset 1 -- pushl %ebx |
539 | |
540 | 0x57, |
541 | // offset 2 -- pushl %edi |
542 | |
543 | 0x56, |
544 | // offset 3 -- pushl %esi |
545 | |
546 | 0x81, 0xec, 0x6c, 0x38, 0x00, 0x00, |
547 | // offset 4 -- subl $0x386c, %esp |
548 | |
549 | 0xe8, 0x00, 0x00, 0x00, 0x00, |
550 | // offset 10 -- calll 0 |
551 | // call the next instruction, to put the pc on the stack |
552 | |
553 | 0x59, |
554 | // offset 15 -- popl %ecx |
555 | // pop the saved pc address into ecx |
556 | |
557 | 0x89, 0x4c, 0x24, 0x08, |
558 | // offset 16 -- movl %ecx, 0x8(%esp) |
559 | |
560 | // .... |
561 | |
562 | 0x83, 0xec, 0x08, |
563 | // offset 20 -- subl $0x8, %esp |
564 | |
565 | 0x50, |
566 | // offset 23 -- pushl %eax |
567 | |
568 | 0xff, 0x74, 0x24, 0x20, |
569 | // offset 24 -- pushl 0x20(%esp) |
570 | |
571 | 0xe8, 0x8c, 0x00, 0x00, 0x00, |
572 | // offset 28 -- calll puts |
573 | |
574 | 0x83, 0xc4, 0x10, |
575 | // offset 33 -- addl $0x10, %esp |
576 | // get esp back to the value it was before the |
577 | // alignment & argument saves for the puts call |
578 | |
579 | 0x43, |
580 | // offset 36 -- incl %ebx |
581 | |
582 | // .... |
583 | |
584 | 0x81, 0xc4, 0x6c, 0x38, 0x00, 0x00, |
585 | // offset 37 -- addl $0x386c, %esp |
586 | |
587 | 0x5e, |
588 | // offset 43 -- popl %esi |
589 | |
590 | 0x5f, |
591 | // offset 44 -- popl %edi |
592 | |
593 | 0x5b, |
594 | // offset 45 -- popl %ebx |
595 | |
596 | 0x5d, |
597 | // offset 46 -- popl %ebp |
598 | |
599 | 0xc3, |
600 | // offset 47 -- retl |
601 | |
602 | 0xe8, 0x12, 0x34, 0x56, 0x78, |
603 | // offset 48 -- calll __stack_chk_fail |
604 | }; |
605 | |
606 | AddressRange sample_range(0x1000, sizeof(data)); |
607 | |
608 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
609 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
610 | data, sizeof(data), sample_range, unwind_plan)); |
611 | |
612 | // Unwind rules should look like |
613 | // |
614 | // 0: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
615 | // 1: CFA=esp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
616 | // 2: CFA=esp+12 => ebx=[CFA-12] ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
617 | // 3: CFA=esp+16 => ebx=[CFA-12] edi=[CFA-16] ebp=[CFA-8] esp=CFA+0 |
618 | // eip=[CFA-4] |
619 | // 4: CFA=esp+20 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
620 | // esp=CFA+0 eip=[CFA-4] |
621 | // 10: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
622 | // esp=CFA+0 eip=[CFA-4] |
623 | // 15: CFA=esp+14468 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
624 | // esp=CFA+0 eip=[CFA-4] |
625 | // 16: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
626 | // esp=CFA+0 eip=[CFA-4] |
627 | // |
628 | // .... |
629 | // |
630 | // 23: CFA=esp+14472 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
631 | // esp=CFA+0 eip=[CFA-4] |
632 | // 24: CFA=esp+14476 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
633 | // esp=CFA+0 eip=[CFA-4] |
634 | // 28: CFA=esp+14480 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
635 | // esp=CFA+0 eip=[CFA-4] |
636 | // 36: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
637 | // esp=CFA+0 eip=[CFA-4] |
638 | // |
639 | // ..... |
640 | // |
641 | // 37: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
642 | // esp=CFA+0 eip=[CFA-4] |
643 | // 43: CFA=esp+20 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
644 | // esp=CFA+0 eip=[CFA-4] |
645 | // 44: CFA=esp+16 => ebx=[CFA-12] edi=[CFA-16] ebp=[CFA-8] esp=CFA+0 |
646 | // eip=[CFA-4] |
647 | // 45: CFA=esp+12 => ebx=[CFA-12] ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
648 | // 46: CFA=esp +8 => ebp=[CFA-8] esp=CFA+0 eip=[CFA-4] |
649 | // 47: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
650 | // 48: CFA=esp+14480 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
651 | // esp=CFA+0 eip=[CFA-4] |
652 | |
653 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
654 | const UnwindPlan::Row *row; |
655 | |
656 | // Check that we get the CFA correct for the pic base setup sequence |
657 | |
658 | // CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
659 | // esp=CFA+0 eip=[CFA-4] |
660 | row = unwind_plan.GetRowForFunctionOffset(offset: 10); |
661 | EXPECT_EQ(10, row->GetOffset()); |
662 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
663 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
664 | EXPECT_EQ(14464, row->GetCFAValue().GetOffset()); |
665 | |
666 | // 15: CFA=esp+14468 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
667 | // esp=CFA+0 eip=[CFA-4] |
668 | row = unwind_plan.GetRowForFunctionOffset(offset: 15); |
669 | EXPECT_EQ(15, row->GetOffset()); |
670 | EXPECT_EQ(14468, row->GetCFAValue().GetOffset()); |
671 | |
672 | // 16: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
673 | // esp=CFA+0 eip=[CFA-4] |
674 | row = unwind_plan.GetRowForFunctionOffset(offset: 16); |
675 | EXPECT_EQ(16, row->GetOffset()); |
676 | EXPECT_EQ(14464, row->GetCFAValue().GetOffset()); |
677 | |
678 | // Check that the row for offset 16 has the registers saved that we expect |
679 | |
680 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
681 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
682 | EXPECT_EQ(-4, regloc.GetOffset()); |
683 | |
684 | EXPECT_TRUE(row->GetRegisterInfo(k_ebp, regloc)); |
685 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
686 | EXPECT_EQ(-8, regloc.GetOffset()); |
687 | |
688 | EXPECT_TRUE(row->GetRegisterInfo(k_ebx, regloc)); |
689 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
690 | EXPECT_EQ(-12, regloc.GetOffset()); |
691 | |
692 | EXPECT_TRUE(row->GetRegisterInfo(k_edi, regloc)); |
693 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
694 | EXPECT_EQ(-16, regloc.GetOffset()); |
695 | |
696 | EXPECT_TRUE(row->GetRegisterInfo(k_esi, regloc)); |
697 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
698 | EXPECT_EQ(-20, regloc.GetOffset()); |
699 | |
700 | // |
701 | // Check the pushing & popping around the call printf instruction |
702 | |
703 | // 23: CFA=esp+14472 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
704 | // esp=CFA+0 eip=[CFA-4] |
705 | row = unwind_plan.GetRowForFunctionOffset(offset: 23); |
706 | EXPECT_EQ(23, row->GetOffset()); |
707 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
708 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
709 | EXPECT_EQ(14472, row->GetCFAValue().GetOffset()); |
710 | |
711 | // 24: CFA=esp+14476 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
712 | // esp=CFA+0 eip=[CFA-4] |
713 | row = unwind_plan.GetRowForFunctionOffset(offset: 24); |
714 | EXPECT_EQ(24, row->GetOffset()); |
715 | EXPECT_EQ(14476, row->GetCFAValue().GetOffset()); |
716 | |
717 | // 28: CFA=esp+14480 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
718 | // esp=CFA+0 eip=[CFA-4] |
719 | row = unwind_plan.GetRowForFunctionOffset(offset: 28); |
720 | EXPECT_EQ(28, row->GetOffset()); |
721 | EXPECT_EQ(14480, row->GetCFAValue().GetOffset()); |
722 | |
723 | // 36: CFA=esp+14464 => ebx=[CFA-12] edi=[CFA-16] esi=[CFA-20] ebp=[CFA-8] |
724 | // esp=CFA+0 eip=[CFA-4] |
725 | row = unwind_plan.GetRowForFunctionOffset(offset: 36); |
726 | EXPECT_EQ(36, row->GetOffset()); |
727 | EXPECT_EQ(14464, row->GetCFAValue().GetOffset()); |
728 | |
729 | // Check that the epilogue gets us back to the original unwind state |
730 | |
731 | // 47: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
732 | row = unwind_plan.GetRowForFunctionOffset(offset: 47); |
733 | EXPECT_EQ(47, row->GetOffset()); |
734 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
735 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
736 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
737 | |
738 | EXPECT_TRUE(row->GetRegisterInfo(k_eip, regloc)); |
739 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
740 | EXPECT_EQ(-4, regloc.GetOffset()); |
741 | |
742 | EXPECT_TRUE(row->GetRegisterInfo(k_esp, regloc)); |
743 | EXPECT_TRUE(regloc.IsCFAPlusOffset()); |
744 | EXPECT_EQ(0, regloc.GetOffset()); |
745 | |
746 | // Check that no unexpected registers were saved |
747 | |
748 | EXPECT_FALSE(row->GetRegisterInfo(k_eax, regloc)); |
749 | EXPECT_FALSE(row->GetRegisterInfo(k_ebx, regloc)); |
750 | EXPECT_FALSE(row->GetRegisterInfo(k_ecx, regloc)); |
751 | EXPECT_FALSE(row->GetRegisterInfo(k_edx, regloc)); |
752 | EXPECT_FALSE(row->GetRegisterInfo(k_esi, regloc)); |
753 | EXPECT_FALSE(row->GetRegisterInfo(k_edi, regloc)); |
754 | EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
755 | } |
756 | |
757 | TEST_F(Testx86AssemblyInspectionEngine, Test64bitFramelessSmallStackFrame) { |
758 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
759 | |
760 | // this source file: |
761 | // #include <stdio.h> |
762 | // int main () { |
763 | // puts ("HI"); |
764 | // } |
765 | // |
766 | // compiled 'clang -fomit-frame-pointer' for x86_64-apple-macosx |
767 | |
768 | uint8_t data[] = { |
769 | 0x50, |
770 | // offset 0 -- pushq %rax |
771 | |
772 | 0x48, 0x8d, 0x3d, 0x32, 0x00, 0x00, 0x00, |
773 | // offset 1 -- leaq 0x32(%rip), %rdi ; "HI" |
774 | |
775 | 0xe8, 0x0b, 0x00, 0x00, 0x00, |
776 | // offset 8 -- callq 0x100000f58 ; puts |
777 | |
778 | 0x31, 0xc9, |
779 | // offset 13 -- xorl %ecx, %ecx |
780 | |
781 | 0x89, 0x44, 0x24, 0x04, |
782 | // offset 15 -- movl %eax, 0x4(%rsp) |
783 | |
784 | 0x89, 0xc8, |
785 | // offset 19 -- movl %ecx, %eax |
786 | |
787 | 0x59, |
788 | // offset 21 -- popq %rcx |
789 | |
790 | 0xc3 |
791 | // offset 22 -- retq |
792 | }; |
793 | |
794 | AddressRange sample_range(0x1000, sizeof(data)); |
795 | |
796 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
797 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
798 | data, sizeof(data), sample_range, unwind_plan)); |
799 | |
800 | // Unwind rules should look like |
801 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
802 | // 1: CFA=rsp+16 => rsp=CFA+0 rip=[CFA-8] |
803 | // 22: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
804 | |
805 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
806 | |
807 | // grab the Row for when the prologue has finished executing: |
808 | // 1: CFA=rsp+16 => rsp=CFA+0 rip=[CFA-8] |
809 | |
810 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 13); |
811 | |
812 | EXPECT_EQ(1, row->GetOffset()); |
813 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
814 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
815 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
816 | |
817 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
818 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
819 | EXPECT_EQ(-8, regloc.GetOffset()); |
820 | |
821 | // none of these were spilled |
822 | |
823 | EXPECT_FALSE(row->GetRegisterInfo(k_rax, regloc)); |
824 | EXPECT_FALSE(row->GetRegisterInfo(k_rbx, regloc)); |
825 | EXPECT_FALSE(row->GetRegisterInfo(k_rcx, regloc)); |
826 | EXPECT_FALSE(row->GetRegisterInfo(k_rdx, regloc)); |
827 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
828 | EXPECT_FALSE(row->GetRegisterInfo(k_rsi, regloc)); |
829 | EXPECT_FALSE(row->GetRegisterInfo(k_rdi, regloc)); |
830 | EXPECT_FALSE(row->GetRegisterInfo(k_r8, regloc)); |
831 | EXPECT_FALSE(row->GetRegisterInfo(k_r9, regloc)); |
832 | EXPECT_FALSE(row->GetRegisterInfo(k_r10, regloc)); |
833 | EXPECT_FALSE(row->GetRegisterInfo(k_r11, regloc)); |
834 | EXPECT_FALSE(row->GetRegisterInfo(k_r12, regloc)); |
835 | EXPECT_FALSE(row->GetRegisterInfo(k_r13, regloc)); |
836 | EXPECT_FALSE(row->GetRegisterInfo(k_r14, regloc)); |
837 | EXPECT_FALSE(row->GetRegisterInfo(k_r15, regloc)); |
838 | |
839 | // grab the Row for when the epilogue has finished executing: |
840 | // 22: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
841 | |
842 | row = unwind_plan.GetRowForFunctionOffset(offset: 22); |
843 | |
844 | EXPECT_EQ(22, row->GetOffset()); |
845 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
846 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
847 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
848 | |
849 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
850 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
851 | EXPECT_EQ(-8, regloc.GetOffset()); |
852 | } |
853 | |
854 | TEST_F(Testx86AssemblyInspectionEngine, Test32bitFramelessSmallStackFrame) { |
855 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
856 | |
857 | // this source file: |
858 | // #include <stdio.h> |
859 | // int main () { |
860 | // puts ("HI"); |
861 | // } |
862 | // |
863 | // compiled 'clang -arch i386 -fomit-frame-pointer' for i386-apple-macosx |
864 | |
865 | uint8_t data[] = { |
866 | 0x83, 0xec, 0x0c, |
867 | // offset 0 -- subl $0xc, %esp |
868 | |
869 | 0xe8, 0x00, 0x00, 0x00, 0x00, |
870 | // offset 3 -- calll 0 {call the next instruction, to put the pc on |
871 | // the stack} |
872 | |
873 | 0x58, |
874 | // offset 8 -- popl %eax {pop the saved pc value off stack, into eax} |
875 | |
876 | 0x8d, 0x80, 0x3a, 0x00, 0x00, 0x00, |
877 | // offset 9 -- leal 0x3a(%eax),%eax |
878 | |
879 | 0x89, 0x04, 0x24, |
880 | // offset 15 -- movl %eax, (%esp) |
881 | |
882 | 0xe8, 0x0d, 0x00, 0x00, 0x00, |
883 | // offset 18 -- calll 0x1f94 (puts) |
884 | |
885 | 0x31, 0xc9, |
886 | // offset 23 -- xorl %ecx, %ecx |
887 | |
888 | 0x89, 0x44, 0x24, 0x08, |
889 | // offset 25 -- movl %eax, 0x8(%esp) |
890 | |
891 | 0x89, 0xc8, |
892 | // offset 29 -- movl %ecx, %eax |
893 | |
894 | 0x83, 0xc4, 0x0c, |
895 | // offset 31 -- addl $0xc, %esp |
896 | |
897 | 0xc3 |
898 | // offset 34 -- retl |
899 | }; |
900 | |
901 | AddressRange sample_range(0x1000, sizeof(data)); |
902 | |
903 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
904 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
905 | data, sizeof(data), sample_range, unwind_plan)); |
906 | |
907 | // Unwind rules should look like |
908 | // row[0]: 0: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
909 | // row[1]: 3: CFA=esp+16 => esp=CFA+0 eip=[CFA-4] |
910 | // row[2]: 8: CFA=esp+20 => esp=CFA+0 eip=[CFA-4] |
911 | // row[3]: 9: CFA=esp+16 => esp=CFA+0 eip=[CFA-4] |
912 | // row[4]: 34: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
913 | |
914 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
915 | |
916 | // Check unwind state before we set up the picbase register |
917 | // 3: CFA=esp+16 => esp=CFA+0 eip=[CFA-4] |
918 | |
919 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
920 | |
921 | EXPECT_EQ(3, row->GetOffset()); |
922 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
923 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
924 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
925 | |
926 | // Check unwind state after we call the next instruction |
927 | // 8: CFA=esp+20 => esp=CFA+0 eip=[CFA-4] |
928 | |
929 | row = unwind_plan.GetRowForFunctionOffset(offset: 8); |
930 | EXPECT_EQ(8, row->GetOffset()); |
931 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
932 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
933 | EXPECT_EQ(20, row->GetCFAValue().GetOffset()); |
934 | |
935 | // Check unwind state after we pop the pic base value off the stack |
936 | // row[3]: 9: CFA=esp+16 => esp=CFA+0 eip=[CFA-4] |
937 | |
938 | row = unwind_plan.GetRowForFunctionOffset(offset: 9); |
939 | EXPECT_EQ(9, row->GetOffset()); |
940 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
941 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
942 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
943 | |
944 | // Check that no unexpected registers were saved |
945 | |
946 | EXPECT_FALSE(row->GetRegisterInfo(k_eax, regloc)); |
947 | EXPECT_FALSE(row->GetRegisterInfo(k_ebx, regloc)); |
948 | EXPECT_FALSE(row->GetRegisterInfo(k_ecx, regloc)); |
949 | EXPECT_FALSE(row->GetRegisterInfo(k_edx, regloc)); |
950 | EXPECT_FALSE(row->GetRegisterInfo(k_esi, regloc)); |
951 | EXPECT_FALSE(row->GetRegisterInfo(k_edi, regloc)); |
952 | EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
953 | |
954 | // verify that we get back to the original unwind state before the ret |
955 | // 34: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
956 | |
957 | row = unwind_plan.GetRowForFunctionOffset(offset: 34); |
958 | EXPECT_EQ(34, row->GetOffset()); |
959 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
960 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
961 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
962 | } |
963 | |
964 | TEST_F(Testx86AssemblyInspectionEngine, TestPushRBP) { |
965 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
966 | const UnwindPlan::Row *row; |
967 | |
968 | uint8_t data[] = { |
969 | 0x55, // pushq %rbp |
970 | 0x90 // nop |
971 | }; |
972 | |
973 | AddressRange sample_range(0x1000, sizeof(data)); |
974 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
975 | |
976 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
977 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
978 | data, sizeof(data), sample_range, unwind_plan)); |
979 | |
980 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
981 | |
982 | EXPECT_EQ(1, row->GetOffset()); |
983 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
984 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
985 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
986 | |
987 | EXPECT_TRUE(row->GetRegisterInfo(k_rbp, regloc)); |
988 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
989 | EXPECT_EQ(-16, regloc.GetOffset()); |
990 | |
991 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
992 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
993 | data, sizeof(data), sample_range, unwind_plan)); |
994 | |
995 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
996 | |
997 | EXPECT_EQ(1, row->GetOffset()); |
998 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
999 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1000 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1001 | |
1002 | EXPECT_TRUE(row->GetRegisterInfo(k_rbp, regloc)); |
1003 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1004 | EXPECT_EQ(-8, regloc.GetOffset()); |
1005 | } |
1006 | |
1007 | TEST_F(Testx86AssemblyInspectionEngine, TestPushImm) { |
1008 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1009 | const UnwindPlan::Row *row; |
1010 | |
1011 | uint8_t data[] = { |
1012 | 0x68, 0xff, 0xff, 0x01, 0x69, // pushq $0x6901ffff |
1013 | 0x6a, 0x7d, // pushl $0x7d |
1014 | 0x90 // nop |
1015 | }; |
1016 | |
1017 | AddressRange sample_range(0x1000, sizeof(data)); |
1018 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1019 | |
1020 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1021 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1022 | data, sizeof(data), sample_range, unwind_plan)); |
1023 | |
1024 | row = unwind_plan.GetRowForFunctionOffset(offset: 5); |
1025 | EXPECT_EQ(5, row->GetOffset()); |
1026 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1027 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1028 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1029 | |
1030 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
1031 | EXPECT_EQ(7, row->GetOffset()); |
1032 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1033 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1034 | EXPECT_EQ(24, row->GetCFAValue().GetOffset()); |
1035 | |
1036 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1037 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1038 | data, sizeof(data), sample_range, unwind_plan)); |
1039 | |
1040 | row = unwind_plan.GetRowForFunctionOffset(offset: 5); |
1041 | EXPECT_EQ(5, row->GetOffset()); |
1042 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1043 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1044 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1045 | |
1046 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
1047 | EXPECT_EQ(7, row->GetOffset()); |
1048 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1049 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1050 | EXPECT_EQ(12, row->GetCFAValue().GetOffset()); |
1051 | } |
1052 | |
1053 | // We treat 'pushq $0' / 'pushl $0' specially - this shows up |
1054 | // in the first function called in a new thread and it needs to |
1055 | // put a 0 as the saved pc. We pretend it didn't change the CFA. |
1056 | TEST_F(Testx86AssemblyInspectionEngine, TestPush0) { |
1057 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1058 | const UnwindPlan::Row *row; |
1059 | |
1060 | uint8_t data[] = { |
1061 | 0x6a, 0x00, // pushq $0 |
1062 | 0x90 // nop |
1063 | }; |
1064 | |
1065 | AddressRange sample_range(0x1000, sizeof(data)); |
1066 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1067 | |
1068 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1069 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1070 | data, sizeof(data), sample_range, unwind_plan)); |
1071 | |
1072 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1073 | |
1074 | // We're verifying that no row was created for the 'pushq $0' |
1075 | EXPECT_EQ(0, row->GetOffset()); |
1076 | |
1077 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1078 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1079 | data, sizeof(data), sample_range, unwind_plan)); |
1080 | |
1081 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1082 | |
1083 | // We're verifying that no row was created for the 'pushq $0' |
1084 | EXPECT_EQ(0, row->GetOffset()); |
1085 | } |
1086 | |
1087 | TEST_F(Testx86AssemblyInspectionEngine, TestPushExtended) { |
1088 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1089 | const UnwindPlan::Row *row; |
1090 | |
1091 | uint8_t data[] = { |
1092 | 0xff, 0x74, 0x24, 0x20, // pushl 0x20(%esp) |
1093 | 0xff, 0xb6, 0xce, 0x01, 0xf0, 0x00, // pushl 0xf001ce(%esi) |
1094 | 0xff, 0x30, // pushl (%eax) |
1095 | 0x90 // nop |
1096 | }; |
1097 | |
1098 | AddressRange sample_range(0x1000, sizeof(data)); |
1099 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1100 | |
1101 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1102 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1103 | data, sizeof(data), sample_range, unwind_plan)); |
1104 | |
1105 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1106 | |
1107 | EXPECT_EQ(4, row->GetOffset()); |
1108 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1109 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1110 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1111 | |
1112 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1113 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1114 | data, sizeof(data), sample_range, unwind_plan)); |
1115 | |
1116 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1117 | EXPECT_EQ(4, row->GetOffset()); |
1118 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1119 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1120 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1121 | |
1122 | row = unwind_plan.GetRowForFunctionOffset(offset: 10); |
1123 | EXPECT_EQ(10, row->GetOffset()); |
1124 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1125 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1126 | EXPECT_EQ(12, row->GetCFAValue().GetOffset()); |
1127 | |
1128 | row = unwind_plan.GetRowForFunctionOffset(offset: 12); |
1129 | EXPECT_EQ(12, row->GetOffset()); |
1130 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1131 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1132 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1133 | } |
1134 | |
1135 | TEST_F(Testx86AssemblyInspectionEngine, TestPushR15) { |
1136 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1137 | const UnwindPlan::Row *row; |
1138 | |
1139 | uint8_t data[] = { |
1140 | 0x41, 0x57, // pushq %r15 |
1141 | 0x90 // nop |
1142 | }; |
1143 | |
1144 | AddressRange sample_range(0x1000, sizeof(data)); |
1145 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1146 | |
1147 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1148 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1149 | data, sizeof(data), sample_range, unwind_plan)); |
1150 | |
1151 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1152 | |
1153 | EXPECT_EQ(2, row->GetOffset()); |
1154 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1155 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1156 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1157 | |
1158 | EXPECT_TRUE(row->GetRegisterInfo(k_r15, regloc)); |
1159 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1160 | EXPECT_EQ(-16, regloc.GetOffset()); |
1161 | } |
1162 | |
1163 | TEST_F(Testx86AssemblyInspectionEngine, TestPushR14) { |
1164 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1165 | const UnwindPlan::Row *row; |
1166 | |
1167 | uint8_t data[] = { |
1168 | 0x41, 0x56, // pushq %r14 |
1169 | 0x90 // nop |
1170 | }; |
1171 | |
1172 | AddressRange sample_range(0x1000, sizeof(data)); |
1173 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1174 | |
1175 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1176 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1177 | data, sizeof(data), sample_range, unwind_plan)); |
1178 | |
1179 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1180 | |
1181 | EXPECT_EQ(2, row->GetOffset()); |
1182 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1183 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1184 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1185 | |
1186 | EXPECT_TRUE(row->GetRegisterInfo(k_r14, regloc)); |
1187 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1188 | EXPECT_EQ(-16, regloc.GetOffset()); |
1189 | } |
1190 | |
1191 | TEST_F(Testx86AssemblyInspectionEngine, TestPushR13) { |
1192 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1193 | const UnwindPlan::Row *row; |
1194 | |
1195 | uint8_t data[] = { |
1196 | 0x41, 0x55, // pushq %r13 |
1197 | 0x90 // nop |
1198 | }; |
1199 | |
1200 | AddressRange sample_range(0x1000, sizeof(data)); |
1201 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1202 | |
1203 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1204 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1205 | data, sizeof(data), sample_range, unwind_plan)); |
1206 | |
1207 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1208 | |
1209 | EXPECT_EQ(2, row->GetOffset()); |
1210 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1211 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1212 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1213 | |
1214 | EXPECT_TRUE(row->GetRegisterInfo(k_r13, regloc)); |
1215 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1216 | EXPECT_EQ(-16, regloc.GetOffset()); |
1217 | } |
1218 | |
1219 | TEST_F(Testx86AssemblyInspectionEngine, TestPushR12) { |
1220 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1221 | const UnwindPlan::Row *row; |
1222 | |
1223 | uint8_t data[] = { |
1224 | 0x41, 0x54, // pushq %r13 |
1225 | 0x90 // nop |
1226 | }; |
1227 | |
1228 | AddressRange sample_range(0x1000, sizeof(data)); |
1229 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1230 | |
1231 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1232 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1233 | data, sizeof(data), sample_range, unwind_plan)); |
1234 | |
1235 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1236 | |
1237 | EXPECT_EQ(2, row->GetOffset()); |
1238 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1239 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1240 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1241 | |
1242 | EXPECT_TRUE(row->GetRegisterInfo(k_r12, regloc)); |
1243 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1244 | EXPECT_EQ(-16, regloc.GetOffset()); |
1245 | } |
1246 | |
1247 | TEST_F(Testx86AssemblyInspectionEngine, TestPushRBX) { |
1248 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1249 | const UnwindPlan::Row *row; |
1250 | |
1251 | uint8_t data[] = { |
1252 | 0x53, // pushq %rbx |
1253 | 0x90 // nop |
1254 | }; |
1255 | |
1256 | AddressRange sample_range(0x1000, sizeof(data)); |
1257 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1258 | |
1259 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1260 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1261 | data, sizeof(data), sample_range, unwind_plan)); |
1262 | |
1263 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1264 | |
1265 | EXPECT_EQ(1, row->GetOffset()); |
1266 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1267 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1268 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1269 | |
1270 | EXPECT_TRUE(row->GetRegisterInfo(k_rbx, regloc)); |
1271 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1272 | EXPECT_EQ(-16, regloc.GetOffset()); |
1273 | } |
1274 | |
1275 | // The ABI is hardcoded in x86AssemblyInspectionEngine such that |
1276 | // eax, ecx, edx are all considered volatile and push/pops of them are |
1277 | // not tracked (except to keep track of stack pointer movement) |
1278 | TEST_F(Testx86AssemblyInspectionEngine, TestPushEAX) { |
1279 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1280 | const UnwindPlan::Row *row; |
1281 | AddressRange sample_range; |
1282 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1283 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1284 | |
1285 | uint8_t data[] = { |
1286 | 0x50, // pushl %eax |
1287 | 0x90 // nop |
1288 | }; |
1289 | |
1290 | sample_range = AddressRange(0x1000, sizeof(data)); |
1291 | |
1292 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1293 | data, sizeof(data), sample_range, unwind_plan)); |
1294 | |
1295 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1296 | EXPECT_EQ(1, row->GetOffset()); |
1297 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1298 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1299 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1300 | |
1301 | EXPECT_FALSE(row->GetRegisterInfo(k_eax, regloc)); |
1302 | } |
1303 | |
1304 | // The ABI is hardcoded in x86AssemblyInspectionEngine such that |
1305 | // eax, ecx, edx are all considered volatile and push/pops of them are |
1306 | // not tracked (except to keep track of stack pointer movement) |
1307 | TEST_F(Testx86AssemblyInspectionEngine, TestPushECX) { |
1308 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1309 | const UnwindPlan::Row *row; |
1310 | AddressRange sample_range; |
1311 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1312 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1313 | |
1314 | uint8_t data[] = { |
1315 | 0x51, // pushl %ecx |
1316 | 0x90 // nop |
1317 | }; |
1318 | |
1319 | sample_range = AddressRange(0x1000, sizeof(data)); |
1320 | |
1321 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1322 | data, sizeof(data), sample_range, unwind_plan)); |
1323 | |
1324 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1325 | EXPECT_EQ(1, row->GetOffset()); |
1326 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1327 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1328 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1329 | |
1330 | EXPECT_FALSE(row->GetRegisterInfo(k_ecx, regloc)); |
1331 | } |
1332 | |
1333 | // The ABI is hardcoded in x86AssemblyInspectionEngine such that |
1334 | // eax, ecx, edx are all considered volatile and push/pops of them are |
1335 | // not tracked (except to keep track of stack pointer movement) |
1336 | TEST_F(Testx86AssemblyInspectionEngine, TestPushEDX) { |
1337 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1338 | const UnwindPlan::Row *row; |
1339 | AddressRange sample_range; |
1340 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1341 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1342 | |
1343 | uint8_t data[] = { |
1344 | 0x52, // pushl %edx |
1345 | 0x90 // nop |
1346 | }; |
1347 | |
1348 | sample_range = AddressRange(0x1000, sizeof(data)); |
1349 | |
1350 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1351 | data, sizeof(data), sample_range, unwind_plan)); |
1352 | |
1353 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1354 | EXPECT_EQ(1, row->GetOffset()); |
1355 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1356 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1357 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1358 | |
1359 | EXPECT_FALSE(row->GetRegisterInfo(k_edx, regloc)); |
1360 | } |
1361 | |
1362 | TEST_F(Testx86AssemblyInspectionEngine, TestPushEBX) { |
1363 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1364 | const UnwindPlan::Row *row; |
1365 | AddressRange sample_range; |
1366 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1367 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1368 | |
1369 | uint8_t data[] = { |
1370 | 0x53, // pushl %ebx |
1371 | 0x90 // nop |
1372 | }; |
1373 | |
1374 | sample_range = AddressRange(0x1000, sizeof(data)); |
1375 | |
1376 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1377 | data, sizeof(data), sample_range, unwind_plan)); |
1378 | |
1379 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1380 | EXPECT_EQ(1, row->GetOffset()); |
1381 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1382 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1383 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1384 | |
1385 | EXPECT_TRUE(row->GetRegisterInfo(k_ebx, regloc)); |
1386 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1387 | EXPECT_EQ(-8, regloc.GetOffset()); |
1388 | } |
1389 | |
1390 | TEST_F(Testx86AssemblyInspectionEngine, TestPushEBP) { |
1391 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1392 | const UnwindPlan::Row *row; |
1393 | AddressRange sample_range; |
1394 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1395 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1396 | |
1397 | uint8_t data[] = { |
1398 | 0x55, // pushl %ebp |
1399 | 0x90 // nop |
1400 | }; |
1401 | |
1402 | sample_range = AddressRange(0x1000, sizeof(data)); |
1403 | |
1404 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1405 | data, sizeof(data), sample_range, unwind_plan)); |
1406 | |
1407 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1408 | EXPECT_EQ(1, row->GetOffset()); |
1409 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1410 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1411 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1412 | |
1413 | EXPECT_TRUE(row->GetRegisterInfo(k_ebp, regloc)); |
1414 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1415 | EXPECT_EQ(-8, regloc.GetOffset()); |
1416 | } |
1417 | |
1418 | TEST_F(Testx86AssemblyInspectionEngine, TestPushRBPWithREX) { |
1419 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1420 | const UnwindPlan::Row *row; |
1421 | |
1422 | uint8_t data[] = { |
1423 | 0x40, 0x55, // pushq %rbp |
1424 | 0x90 // nop |
1425 | }; |
1426 | |
1427 | AddressRange sample_range(0x1000, sizeof(data)); |
1428 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1429 | |
1430 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1431 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1432 | data, sizeof(data), sample_range, unwind_plan)); |
1433 | |
1434 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1435 | |
1436 | EXPECT_EQ(2, row->GetOffset()); |
1437 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1438 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1439 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
1440 | |
1441 | EXPECT_TRUE(row->GetRegisterInfo(k_rbp, regloc)); |
1442 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1443 | EXPECT_EQ(-16, regloc.GetOffset()); |
1444 | } |
1445 | |
1446 | TEST_F(Testx86AssemblyInspectionEngine, TestPushESI) { |
1447 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1448 | const UnwindPlan::Row *row; |
1449 | AddressRange sample_range; |
1450 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1451 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1452 | |
1453 | uint8_t data[] = { |
1454 | 0x56, // pushl %esi |
1455 | 0x90 // nop |
1456 | }; |
1457 | |
1458 | sample_range = AddressRange(0x1000, sizeof(data)); |
1459 | |
1460 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1461 | data, sizeof(data), sample_range, unwind_plan)); |
1462 | |
1463 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1464 | EXPECT_EQ(1, row->GetOffset()); |
1465 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1466 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1467 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1468 | |
1469 | EXPECT_TRUE(row->GetRegisterInfo(k_esi, regloc)); |
1470 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1471 | EXPECT_EQ(-8, regloc.GetOffset()); |
1472 | } |
1473 | |
1474 | TEST_F(Testx86AssemblyInspectionEngine, TestPushEDI) { |
1475 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1476 | const UnwindPlan::Row *row; |
1477 | AddressRange sample_range; |
1478 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1479 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1480 | |
1481 | uint8_t data[] = { |
1482 | 0x57, // pushl %edi |
1483 | 0x90 // nop |
1484 | }; |
1485 | |
1486 | sample_range = AddressRange(0x1000, sizeof(data)); |
1487 | |
1488 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1489 | data, sizeof(data), sample_range, unwind_plan)); |
1490 | |
1491 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
1492 | EXPECT_EQ(1, row->GetOffset()); |
1493 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
1494 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1495 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1496 | |
1497 | EXPECT_TRUE(row->GetRegisterInfo(k_edi, regloc)); |
1498 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
1499 | EXPECT_EQ(-8, regloc.GetOffset()); |
1500 | } |
1501 | |
1502 | TEST_F(Testx86AssemblyInspectionEngine, TestMovRSPtoRBP) { |
1503 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1504 | const UnwindPlan::Row *row; |
1505 | |
1506 | uint8_t data64_1[] = { |
1507 | 0x48, 0x8b, 0xec, // movq %rsp, %rbp |
1508 | 0x90 // nop |
1509 | }; |
1510 | |
1511 | AddressRange sample_range(0x1000, sizeof(data64_1)); |
1512 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1513 | |
1514 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1515 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1516 | data64_1, sizeof(data64_1), sample_range, unwind_plan)); |
1517 | |
1518 | row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
1519 | |
1520 | EXPECT_EQ(3, row->GetOffset()); |
1521 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
1522 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1523 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1524 | |
1525 | uint8_t data64_2[] = { |
1526 | 0x48, 0x89, 0xe5, // movq %rsp, %rbp |
1527 | 0x90 // nop |
1528 | }; |
1529 | |
1530 | sample_range = AddressRange(0x1000, sizeof(data64_2)); |
1531 | unwind_plan.Clear(); |
1532 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1533 | data64_2, sizeof(data64_2), sample_range, unwind_plan)); |
1534 | |
1535 | row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
1536 | EXPECT_EQ(3, row->GetOffset()); |
1537 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
1538 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1539 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1540 | |
1541 | uint8_t data32_1[] = { |
1542 | 0x8b, 0xec, // movl %rsp, %rbp |
1543 | 0x90 // nop |
1544 | }; |
1545 | |
1546 | sample_range = AddressRange(0x1000, sizeof(data32_1)); |
1547 | unwind_plan.Clear(); |
1548 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1549 | data32_1, sizeof(data32_1), sample_range, unwind_plan)); |
1550 | |
1551 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1552 | EXPECT_EQ(2, row->GetOffset()); |
1553 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_ebp); |
1554 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1555 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1556 | |
1557 | uint8_t data32_2[] = { |
1558 | 0x89, 0xe5, // movl %rsp, %rbp |
1559 | 0x90 // nop |
1560 | }; |
1561 | |
1562 | sample_range = AddressRange(0x1000, sizeof(data32_2)); |
1563 | unwind_plan.Clear(); |
1564 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1565 | data32_2, sizeof(data32_2), sample_range, unwind_plan)); |
1566 | |
1567 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1568 | EXPECT_EQ(2, row->GetOffset()); |
1569 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_ebp); |
1570 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1571 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1572 | } |
1573 | |
1574 | TEST_F(Testx86AssemblyInspectionEngine, TestSubRSP) { |
1575 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1576 | const UnwindPlan::Row *row; |
1577 | AddressRange sample_range; |
1578 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1579 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1580 | |
1581 | uint8_t data1[] = { |
1582 | 0x48, 0x81, 0xec, 0x00, 0x01, 0x00, 0x00, // subq $0x100, $rsp |
1583 | 0x90 // nop |
1584 | }; |
1585 | |
1586 | sample_range = AddressRange(0x1000, sizeof(data1)); |
1587 | |
1588 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1589 | data1, sizeof(data1), sample_range, unwind_plan)); |
1590 | |
1591 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
1592 | EXPECT_EQ(7, row->GetOffset()); |
1593 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1594 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1595 | EXPECT_EQ(264, row->GetCFAValue().GetOffset()); |
1596 | |
1597 | uint8_t data2[] = { |
1598 | 0x48, 0x83, 0xec, 0x10, // subq $0x10, %rsp |
1599 | 0x90 // nop |
1600 | }; |
1601 | |
1602 | sample_range = AddressRange(0x1000, sizeof(data2)); |
1603 | |
1604 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1605 | data2, sizeof(data2), sample_range, unwind_plan)); |
1606 | |
1607 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1608 | EXPECT_EQ(4, row->GetOffset()); |
1609 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1610 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1611 | EXPECT_EQ(24, row->GetCFAValue().GetOffset()); |
1612 | } |
1613 | |
1614 | TEST_F(Testx86AssemblyInspectionEngine, TestSubESP) { |
1615 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1616 | const UnwindPlan::Row *row; |
1617 | AddressRange sample_range; |
1618 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1619 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1620 | |
1621 | uint8_t data1[] = { |
1622 | 0x81, 0xec, 0x00, 0x01, 0x00, 0x00, // subl $0x100, %esp |
1623 | 0x90 // nop |
1624 | }; |
1625 | |
1626 | sample_range = AddressRange(0x1000, sizeof(data1)); |
1627 | |
1628 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1629 | data1, sizeof(data1), sample_range, unwind_plan)); |
1630 | |
1631 | row = unwind_plan.GetRowForFunctionOffset(offset: 6); |
1632 | EXPECT_EQ(6, row->GetOffset()); |
1633 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1634 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1635 | EXPECT_EQ(260, row->GetCFAValue().GetOffset()); |
1636 | |
1637 | uint8_t data2[] = { |
1638 | 0x83, 0xec, 0x10, // subq $0x10, %esp |
1639 | 0x90 // nop |
1640 | }; |
1641 | |
1642 | sample_range = AddressRange(0x1000, sizeof(data2)); |
1643 | |
1644 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1645 | data2, sizeof(data2), sample_range, unwind_plan)); |
1646 | |
1647 | row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
1648 | EXPECT_EQ(3, row->GetOffset()); |
1649 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1650 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1651 | EXPECT_EQ(20, row->GetCFAValue().GetOffset()); |
1652 | } |
1653 | |
1654 | TEST_F(Testx86AssemblyInspectionEngine, TestAddRSP) { |
1655 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1656 | const UnwindPlan::Row *row; |
1657 | AddressRange sample_range; |
1658 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1659 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
1660 | |
1661 | uint8_t data1[] = { |
1662 | 0x48, 0x81, 0xc4, 0x00, 0x01, 0x00, 0x00, // addq $0x100, %rsp |
1663 | 0x90 // nop |
1664 | }; |
1665 | |
1666 | sample_range = AddressRange(0x1000, sizeof(data1)); |
1667 | |
1668 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1669 | data1, sizeof(data1), sample_range, unwind_plan)); |
1670 | |
1671 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
1672 | EXPECT_EQ(7, row->GetOffset()); |
1673 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1674 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1675 | EXPECT_EQ(8 - 256, row->GetCFAValue().GetOffset()); |
1676 | |
1677 | uint8_t data2[] = { |
1678 | 0x48, 0x83, 0xc4, 0x10, // addq $0x10, %rsp |
1679 | 0x90 // nop |
1680 | }; |
1681 | |
1682 | sample_range = AddressRange(0x1000, sizeof(data2)); |
1683 | |
1684 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
1685 | data2, sizeof(data2), sample_range, unwind_plan)); |
1686 | |
1687 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1688 | EXPECT_EQ(4, row->GetOffset()); |
1689 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1690 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1691 | EXPECT_EQ(8 - 16, row->GetCFAValue().GetOffset()); |
1692 | } |
1693 | |
1694 | TEST_F(Testx86AssemblyInspectionEngine, TestAddESP) { |
1695 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1696 | const UnwindPlan::Row *row; |
1697 | AddressRange sample_range; |
1698 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1699 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
1700 | |
1701 | uint8_t data1[] = { |
1702 | 0x81, 0xc4, 0x00, 0x01, 0x00, 0x00, // addl $0x100, %esp |
1703 | 0x90 // nop |
1704 | }; |
1705 | |
1706 | sample_range = AddressRange(0x1000, sizeof(data1)); |
1707 | |
1708 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1709 | data1, sizeof(data1), sample_range, unwind_plan)); |
1710 | |
1711 | row = unwind_plan.GetRowForFunctionOffset(offset: 6); |
1712 | EXPECT_EQ(6, row->GetOffset()); |
1713 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1714 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1715 | EXPECT_EQ(4 - 256, row->GetCFAValue().GetOffset()); |
1716 | |
1717 | uint8_t data2[] = { |
1718 | 0x83, 0xc4, 0x10, // addq $0x10, %esp |
1719 | 0x90 // nop |
1720 | }; |
1721 | |
1722 | sample_range = AddressRange(0x1000, sizeof(data2)); |
1723 | |
1724 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
1725 | data2, sizeof(data2), sample_range, unwind_plan)); |
1726 | |
1727 | row = unwind_plan.GetRowForFunctionOffset(offset: 3); |
1728 | EXPECT_EQ(3, row->GetOffset()); |
1729 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1730 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1731 | EXPECT_EQ(4 - 16, row->GetCFAValue().GetOffset()); |
1732 | } |
1733 | |
1734 | TEST_F(Testx86AssemblyInspectionEngine, TestLEA_RSP_Pattern) { |
1735 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1736 | const UnwindPlan::Row *row; |
1737 | AddressRange sample_range; |
1738 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1739 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1740 | |
1741 | uint8_t data[] = { |
1742 | 0x8d, 0x64, 0x24, 0x10, // lea rsp, [rsp + 0x10] |
1743 | 0x90 // nop |
1744 | }; |
1745 | |
1746 | sample_range = AddressRange(0x1000, sizeof(data)); |
1747 | |
1748 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1749 | data, sizeof(data), sample_range, unwind_plan)); |
1750 | |
1751 | row = unwind_plan.GetRowForFunctionOffset(offset: 0); |
1752 | EXPECT_EQ(0, row->GetOffset()); |
1753 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1754 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1755 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1756 | } |
1757 | |
1758 | TEST_F(Testx86AssemblyInspectionEngine, TestPopRBX) { |
1759 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1760 | const UnwindPlan::Row *row; |
1761 | AddressRange sample_range; |
1762 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1763 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1764 | |
1765 | uint8_t data[] = { |
1766 | 0x53, // pushq %rbx |
1767 | 0x5b, // popq %rbx |
1768 | 0x90 // nop |
1769 | }; |
1770 | |
1771 | sample_range = AddressRange(0x1000, sizeof(data)); |
1772 | |
1773 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1774 | data, sizeof(data), sample_range, unwind_plan)); |
1775 | |
1776 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1777 | EXPECT_EQ(2, row->GetOffset()); |
1778 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1779 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1780 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1781 | EXPECT_FALSE(row->GetRegisterInfo(k_rbx, regloc)); |
1782 | } |
1783 | |
1784 | TEST_F(Testx86AssemblyInspectionEngine, TestPopRBP) { |
1785 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1786 | const UnwindPlan::Row *row; |
1787 | AddressRange sample_range; |
1788 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1789 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1790 | |
1791 | uint8_t data[] = { |
1792 | 0x55, // pushq %rbp |
1793 | 0x5d, // popq %rbp |
1794 | 0x90 // nop |
1795 | }; |
1796 | |
1797 | sample_range = AddressRange(0x1000, sizeof(data)); |
1798 | |
1799 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1800 | data, sizeof(data), sample_range, unwind_plan)); |
1801 | |
1802 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1803 | EXPECT_EQ(2, row->GetOffset()); |
1804 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1805 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1806 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1807 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
1808 | } |
1809 | |
1810 | TEST_F(Testx86AssemblyInspectionEngine, TestPopR12) { |
1811 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1812 | const UnwindPlan::Row *row; |
1813 | AddressRange sample_range; |
1814 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1815 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1816 | |
1817 | uint8_t data[] = { |
1818 | 0x41, 0x54, // pushq %r12 |
1819 | 0x41, 0x5c, // popq %r12 |
1820 | 0x90 // nop |
1821 | }; |
1822 | |
1823 | sample_range = AddressRange(0x1000, sizeof(data)); |
1824 | |
1825 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1826 | data, sizeof(data), sample_range, unwind_plan)); |
1827 | |
1828 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1829 | EXPECT_EQ(4, row->GetOffset()); |
1830 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1831 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1832 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1833 | EXPECT_FALSE(row->GetRegisterInfo(k_r12, regloc)); |
1834 | } |
1835 | |
1836 | TEST_F(Testx86AssemblyInspectionEngine, TestPopR13) { |
1837 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1838 | const UnwindPlan::Row *row; |
1839 | AddressRange sample_range; |
1840 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1841 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1842 | |
1843 | uint8_t data[] = { |
1844 | 0x41, 0x55, // pushq %r13 |
1845 | 0x41, 0x5d, // popq %r13 |
1846 | 0x90 // nop |
1847 | }; |
1848 | |
1849 | sample_range = AddressRange(0x1000, sizeof(data)); |
1850 | |
1851 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1852 | data, sizeof(data), sample_range, unwind_plan)); |
1853 | |
1854 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1855 | EXPECT_EQ(4, row->GetOffset()); |
1856 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1857 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1858 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1859 | EXPECT_FALSE(row->GetRegisterInfo(k_r13, regloc)); |
1860 | } |
1861 | |
1862 | TEST_F(Testx86AssemblyInspectionEngine, TestPopR14) { |
1863 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1864 | const UnwindPlan::Row *row; |
1865 | AddressRange sample_range; |
1866 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1867 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1868 | |
1869 | uint8_t data[] = { |
1870 | 0x41, 0x56, // pushq %r14 |
1871 | 0x41, 0x5e, // popq %r14 |
1872 | 0x90 // nop |
1873 | }; |
1874 | |
1875 | sample_range = AddressRange(0x1000, sizeof(data)); |
1876 | |
1877 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1878 | data, sizeof(data), sample_range, unwind_plan)); |
1879 | |
1880 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1881 | EXPECT_EQ(4, row->GetOffset()); |
1882 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1883 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1884 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1885 | EXPECT_FALSE(row->GetRegisterInfo(k_r14, regloc)); |
1886 | } |
1887 | |
1888 | TEST_F(Testx86AssemblyInspectionEngine, TestPopR15) { |
1889 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1890 | const UnwindPlan::Row *row; |
1891 | AddressRange sample_range; |
1892 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1893 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1894 | |
1895 | uint8_t data[] = { |
1896 | 0x41, 0x57, // pushq %r15 |
1897 | 0x41, 0x5f, // popq %r15 |
1898 | 0x90 // nop |
1899 | }; |
1900 | |
1901 | sample_range = AddressRange(0x1000, sizeof(data)); |
1902 | |
1903 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1904 | data, sizeof(data), sample_range, unwind_plan)); |
1905 | |
1906 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1907 | EXPECT_EQ(4, row->GetOffset()); |
1908 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1909 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1910 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1911 | EXPECT_FALSE(row->GetRegisterInfo(k_r15, regloc)); |
1912 | } |
1913 | |
1914 | TEST_F(Testx86AssemblyInspectionEngine, TestPopEBX) { |
1915 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1916 | const UnwindPlan::Row *row; |
1917 | AddressRange sample_range; |
1918 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1919 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
1920 | |
1921 | uint8_t data[] = { |
1922 | 0x53, // pushl %ebx |
1923 | 0x5b, // popl %ebx |
1924 | 0x90 // nop |
1925 | }; |
1926 | |
1927 | sample_range = AddressRange(0x1000, sizeof(data)); |
1928 | |
1929 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1930 | data, sizeof(data), sample_range, unwind_plan)); |
1931 | |
1932 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1933 | EXPECT_EQ(2, row->GetOffset()); |
1934 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1935 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1936 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
1937 | EXPECT_FALSE(row->GetRegisterInfo(k_ebx, regloc)); |
1938 | } |
1939 | |
1940 | TEST_F(Testx86AssemblyInspectionEngine, TestPopEBP) { |
1941 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1942 | const UnwindPlan::Row *row; |
1943 | AddressRange sample_range; |
1944 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1945 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
1946 | |
1947 | uint8_t data[] = { |
1948 | 0x55, // pushl %ebp |
1949 | 0x5d, // popl %ebp |
1950 | 0x90 // nop |
1951 | }; |
1952 | |
1953 | sample_range = AddressRange(0x1000, sizeof(data)); |
1954 | |
1955 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1956 | data, sizeof(data), sample_range, unwind_plan)); |
1957 | |
1958 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
1959 | EXPECT_EQ(2, row->GetOffset()); |
1960 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1961 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1962 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
1963 | EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
1964 | } |
1965 | |
1966 | TEST_F(Testx86AssemblyInspectionEngine, TestPopRBPWithREX) { |
1967 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1968 | const UnwindPlan::Row *row; |
1969 | AddressRange sample_range; |
1970 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1971 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
1972 | |
1973 | uint8_t data[] = { |
1974 | 0x40, 0x55, // pushq %rbp |
1975 | 0x40, 0x5d, // popq %rbp |
1976 | 0x90 // nop |
1977 | }; |
1978 | |
1979 | sample_range = AddressRange(0x1000, sizeof(data)); |
1980 | |
1981 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
1982 | data, sizeof(data), sample_range, unwind_plan)); |
1983 | |
1984 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
1985 | EXPECT_EQ(4, row->GetOffset()); |
1986 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
1987 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
1988 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
1989 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
1990 | } |
1991 | |
1992 | TEST_F(Testx86AssemblyInspectionEngine, TestPopESI) { |
1993 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
1994 | const UnwindPlan::Row *row; |
1995 | AddressRange sample_range; |
1996 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
1997 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
1998 | |
1999 | uint8_t data[] = { |
2000 | 0x56, // pushl %esi |
2001 | 0x5e, // popl %esi |
2002 | 0x90 // nop |
2003 | }; |
2004 | |
2005 | sample_range = AddressRange(0x1000, sizeof(data)); |
2006 | |
2007 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
2008 | data, sizeof(data), sample_range, unwind_plan)); |
2009 | |
2010 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2011 | EXPECT_EQ(2, row->GetOffset()); |
2012 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2013 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2014 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
2015 | EXPECT_FALSE(row->GetRegisterInfo(k_esi, regloc)); |
2016 | } |
2017 | |
2018 | TEST_F(Testx86AssemblyInspectionEngine, TestPopEDI) { |
2019 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2020 | const UnwindPlan::Row *row; |
2021 | AddressRange sample_range; |
2022 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2023 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
2024 | |
2025 | uint8_t data[] = { |
2026 | 0x57, // pushl %edi |
2027 | 0x5f, // popl %edi |
2028 | 0x90 // nop |
2029 | }; |
2030 | |
2031 | sample_range = AddressRange(0x1000, sizeof(data)); |
2032 | |
2033 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
2034 | data, sizeof(data), sample_range, unwind_plan)); |
2035 | |
2036 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2037 | EXPECT_EQ(2, row->GetOffset()); |
2038 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2039 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2040 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
2041 | EXPECT_FALSE(row->GetRegisterInfo(k_edi, regloc)); |
2042 | } |
2043 | |
2044 | // We don't track these registers, but make sure the CFA address is updated |
2045 | // if we're defining the CFA in term of esp. |
2046 | TEST_F(Testx86AssemblyInspectionEngine, Testi386IgnoredRegisters) { |
2047 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2048 | const UnwindPlan::Row *row; |
2049 | AddressRange sample_range; |
2050 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2051 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
2052 | |
2053 | uint8_t data[] = { |
2054 | 0x0e, // push cs |
2055 | 0x16, // push ss |
2056 | 0x1e, // push ds |
2057 | 0x06, // push es |
2058 | |
2059 | 0x07, // pop es |
2060 | 0x1f, // pop ds |
2061 | 0x17, // pop ss |
2062 | |
2063 | 0x90 // nop |
2064 | }; |
2065 | |
2066 | sample_range = AddressRange(0x1000, sizeof(data)); |
2067 | |
2068 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
2069 | data, sizeof(data), sample_range, unwind_plan)); |
2070 | |
2071 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
2072 | EXPECT_EQ(4, row->GetOffset()); |
2073 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2074 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2075 | EXPECT_EQ(20, row->GetCFAValue().GetOffset()); |
2076 | |
2077 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
2078 | EXPECT_EQ(7, row->GetOffset()); |
2079 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2080 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2081 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2082 | } |
2083 | |
2084 | TEST_F(Testx86AssemblyInspectionEngine, TestLEAVE) { |
2085 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2086 | const UnwindPlan::Row *row; |
2087 | AddressRange sample_range; |
2088 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2089 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2090 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2091 | |
2092 | uint8_t data[] = { |
2093 | 0x55, // push %rbp/ebp |
2094 | 0xc9, // leave |
2095 | 0x90 // nop |
2096 | }; |
2097 | |
2098 | sample_range = AddressRange(0x1000, sizeof(data)); |
2099 | |
2100 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
2101 | data, sizeof(data), sample_range, unwind_plan)); |
2102 | |
2103 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2104 | EXPECT_EQ(2, row->GetOffset()); |
2105 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2106 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2107 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2108 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
2109 | |
2110 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2111 | data, sizeof(data), sample_range, unwind_plan)); |
2112 | |
2113 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2114 | EXPECT_EQ(2, row->GetOffset()); |
2115 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2116 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2117 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
2118 | EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
2119 | } |
2120 | |
2121 | // In i386, which lacks pc-relative addressing, a common code sequence |
2122 | // is to call the next instruction (i.e. call imm32, value of 0) which |
2123 | // pushes the addr of the next insn on the stack, and then pop that value |
2124 | // into a register (the "pic base" register). |
2125 | TEST_F(Testx86AssemblyInspectionEngine, TestCALLNextInsn) { |
2126 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2127 | const UnwindPlan::Row *row; |
2128 | AddressRange sample_range; |
2129 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2130 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2131 | |
2132 | uint8_t data[] = { |
2133 | 0xe8, 0x00, 0x00, 0x00, 0x00, // call 0 |
2134 | 0x90 // nop |
2135 | }; |
2136 | |
2137 | sample_range = AddressRange(0x1000, sizeof(data)); |
2138 | |
2139 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2140 | data, sizeof(data), sample_range, unwind_plan)); |
2141 | |
2142 | row = unwind_plan.GetRowForFunctionOffset(offset: 5); |
2143 | EXPECT_EQ(5, row->GetOffset()); |
2144 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2145 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2146 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2147 | EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
2148 | } |
2149 | |
2150 | TEST_F(Testx86AssemblyInspectionEngine, TestSpillRegToStackViaMOVx86_64) { |
2151 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2152 | const UnwindPlan::Row *row; |
2153 | AddressRange sample_range; |
2154 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2155 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2156 | |
2157 | uint8_t data[] = { |
2158 | 0x55, // pushq %rbp |
2159 | 0x48, 0x89, 0xe5, // movq %rsp, %rbp |
2160 | 0x4c, 0x89, 0x75, 0xc0, // movq %r14, -0x40(%rbp) |
2161 | 0x4c, 0x89, 0xbd, 0x28, 0xfa, 0xff, 0xff, // movq %r15, -0x5d8(%rbp) |
2162 | 0x48, 0x89, 0x5d, 0xb8, // movq %rbx, -0x48(%rbp) |
2163 | 0x90 // nop |
2164 | }; |
2165 | |
2166 | sample_range = AddressRange(0x1000, sizeof(data)); |
2167 | |
2168 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
2169 | data, sizeof(data), sample_range, unwind_plan)); |
2170 | |
2171 | row = unwind_plan.GetRowForFunctionOffset(offset: 19); |
2172 | EXPECT_EQ(19, row->GetOffset()); |
2173 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2174 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2175 | |
2176 | EXPECT_TRUE(row->GetRegisterInfo(k_r14, regloc)); |
2177 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2178 | EXPECT_EQ(-80, regloc.GetOffset()); |
2179 | |
2180 | EXPECT_TRUE(row->GetRegisterInfo(k_r15, regloc)); |
2181 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2182 | EXPECT_EQ(-1512, regloc.GetOffset()); |
2183 | |
2184 | EXPECT_TRUE(row->GetRegisterInfo(k_rbx, regloc)); |
2185 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2186 | EXPECT_EQ(-88, regloc.GetOffset()); |
2187 | } |
2188 | |
2189 | TEST_F(Testx86AssemblyInspectionEngine, TestSpillRegToStackViaMOVi386) { |
2190 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2191 | const UnwindPlan::Row *row; |
2192 | AddressRange sample_range; |
2193 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2194 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2195 | |
2196 | uint8_t data[] = { |
2197 | 0x55, // pushl %ebp |
2198 | 0x89, 0xe5, // movl %esp, %ebp |
2199 | 0x89, 0x9d, 0xb0, 0xfe, 0xff, 0xff, // movl %ebx, -0x150(%ebp) |
2200 | 0x89, 0x75, 0xe0, // movl %esi, -0x20(%ebp) |
2201 | 0x90 // nop |
2202 | }; |
2203 | |
2204 | sample_range = AddressRange(0x1000, sizeof(data)); |
2205 | |
2206 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2207 | data, sizeof(data), sample_range, unwind_plan)); |
2208 | |
2209 | row = unwind_plan.GetRowForFunctionOffset(offset: 12); |
2210 | EXPECT_EQ(12, row->GetOffset()); |
2211 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2212 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2213 | |
2214 | EXPECT_TRUE(row->GetRegisterInfo(k_ebx, regloc)); |
2215 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2216 | EXPECT_EQ(-344, regloc.GetOffset()); |
2217 | |
2218 | EXPECT_TRUE(row->GetRegisterInfo(k_esi, regloc)); |
2219 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2220 | EXPECT_EQ(-40, regloc.GetOffset()); |
2221 | } |
2222 | |
2223 | TEST_F(Testx86AssemblyInspectionEngine, TestSpArithx86_64Augmented) { |
2224 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2225 | AddressRange sample_range; |
2226 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2227 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2228 | |
2229 | uint8_t data[] = { |
2230 | 0x55, // pushq %rbp |
2231 | 0x48, 0x89, 0xe5, // movq %rsp, %rbp |
2232 | |
2233 | // x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite |
2234 | // has a bug where it can't augment a function that is just |
2235 | // prologue+epilogue - it needs at least one other instruction |
2236 | // in between. |
2237 | |
2238 | 0x90, // nop |
2239 | 0x48, 0x81, 0xec, 0x88, 0, 0, 0, // subq $0x88, %rsp |
2240 | 0x90, // nop |
2241 | 0x48, 0x81, 0xc4, 0x88, 0, 0, 0, // addq $0x88, %rsp |
2242 | |
2243 | 0x5d, // popq %rbp |
2244 | 0xc3 // retq |
2245 | }; |
2246 | |
2247 | sample_range = AddressRange(0x1000, sizeof(data)); |
2248 | |
2249 | unwind_plan.SetSourceName("unit testing hand-created unwind plan" ); |
2250 | unwind_plan.SetPlanValidAddressRanges({sample_range}); |
2251 | unwind_plan.SetRegisterKind(eRegisterKindLLDB); |
2252 | |
2253 | { |
2254 | UnwindPlan::Row row; |
2255 | |
2256 | // Describe offset 0 |
2257 | row.SetOffset(0); |
2258 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 8); |
2259 | regloc.SetAtCFAPlusOffset(-8); |
2260 | row.SetRegisterInfo(reg_num: k_rip, register_location: regloc); |
2261 | unwind_plan.AppendRow(row); |
2262 | |
2263 | // Describe offset 1 |
2264 | row.SetOffset(1); |
2265 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 16); |
2266 | regloc.SetAtCFAPlusOffset(-16); |
2267 | row.SetRegisterInfo(reg_num: k_rbp, register_location: regloc); |
2268 | unwind_plan.AppendRow(row); |
2269 | |
2270 | // Describe offset 4 |
2271 | row.SetOffset(4); |
2272 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 16); |
2273 | unwind_plan.AppendRow(row); |
2274 | } |
2275 | |
2276 | RegisterContextSP reg_ctx_sp; |
2277 | EXPECT_TRUE(engine64->AugmentUnwindPlanFromCallSite( |
2278 | data, sizeof(data), sample_range, unwind_plan, reg_ctx_sp)); |
2279 | |
2280 | // Before we touch the stack pointer, we should still refer to the |
2281 | // row from after the prologue. |
2282 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 5); |
2283 | EXPECT_EQ(4, row->GetOffset()); |
2284 | |
2285 | // Check the first stack pointer update. |
2286 | row = unwind_plan.GetRowForFunctionOffset(offset: 12); |
2287 | EXPECT_EQ(12, row->GetOffset()); |
2288 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2289 | EXPECT_EQ(152, row->GetCFAValue().GetOffset()); |
2290 | |
2291 | // After the nop, we should still refer to the same row. |
2292 | row = unwind_plan.GetRowForFunctionOffset(offset: 13); |
2293 | EXPECT_EQ(12, row->GetOffset()); |
2294 | |
2295 | // Check that the second stack pointer update is reflected in the |
2296 | // unwind plan. |
2297 | row = unwind_plan.GetRowForFunctionOffset(offset: 20); |
2298 | EXPECT_EQ(20, row->GetOffset()); |
2299 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2300 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2301 | } |
2302 | |
2303 | TEST_F(Testx86AssemblyInspectionEngine, TestSimplex86_64Augmented) { |
2304 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2305 | AddressRange sample_range; |
2306 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2307 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2308 | |
2309 | uint8_t data[] = { |
2310 | 0x55, // pushq %rbp |
2311 | 0x48, 0x89, 0xe5, // movq %rsp, %rbp |
2312 | |
2313 | // x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite |
2314 | // has a bug where it can't augment a function that is just |
2315 | // prologue+epilogue - it needs at least one other instruction |
2316 | // in between. |
2317 | 0x90, // nop |
2318 | |
2319 | 0x5d, // popq %rbp |
2320 | 0xc3 // retq |
2321 | }; |
2322 | |
2323 | sample_range = AddressRange(0x1000, sizeof(data)); |
2324 | |
2325 | unwind_plan.SetSourceName("unit testing hand-created unwind plan" ); |
2326 | unwind_plan.SetPlanValidAddressRanges({sample_range}); |
2327 | unwind_plan.SetRegisterKind(eRegisterKindLLDB); |
2328 | |
2329 | { |
2330 | UnwindPlan::Row row; |
2331 | |
2332 | // Describe offset 0 |
2333 | row.SetOffset(0); |
2334 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 8); |
2335 | regloc.SetAtCFAPlusOffset(-8); |
2336 | row.SetRegisterInfo(reg_num: k_rip, register_location: regloc); |
2337 | unwind_plan.AppendRow(row); |
2338 | |
2339 | // Describe offset 1 |
2340 | row.SetOffset(1); |
2341 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 16); |
2342 | regloc.SetAtCFAPlusOffset(-16); |
2343 | row.SetRegisterInfo(reg_num: k_rbp, register_location: regloc); |
2344 | unwind_plan.AppendRow(row); |
2345 | |
2346 | // Describe offset 4 |
2347 | row.SetOffset(4); |
2348 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_rbp, offset: 16); |
2349 | unwind_plan.AppendRow(row); |
2350 | } |
2351 | |
2352 | RegisterContextSP reg_ctx_sp; |
2353 | EXPECT_TRUE(engine64->AugmentUnwindPlanFromCallSite( |
2354 | data, sizeof(data), sample_range, unwind_plan, reg_ctx_sp)); |
2355 | |
2356 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 6); |
2357 | EXPECT_EQ(6, row->GetOffset()); |
2358 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2359 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2360 | |
2361 | // x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite |
2362 | // doesn't track register restores (pop'ing a reg value back from |
2363 | // the stack) - it was just written to make stepping work correctly. |
2364 | // Technically we should be able to do the following test, but it |
2365 | // won't work today - the unwind plan will still say that the caller's |
2366 | // rbp is on the stack. |
2367 | // EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
2368 | } |
2369 | |
2370 | TEST_F(Testx86AssemblyInspectionEngine, TestSimplei386ugmented) { |
2371 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2372 | AddressRange sample_range; |
2373 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2374 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2375 | |
2376 | uint8_t data[] = { |
2377 | 0x55, // pushl %ebp |
2378 | 0x89, 0xe5, // movl %esp, %ebp |
2379 | |
2380 | // x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite |
2381 | // has a bug where it can't augment a function that is just |
2382 | // prologue+epilogue - it needs at least one other instruction |
2383 | // in between. |
2384 | 0x90, // nop |
2385 | |
2386 | 0x5d, // popl %ebp |
2387 | 0xc3 // retl |
2388 | }; |
2389 | |
2390 | sample_range = AddressRange(0x1000, sizeof(data)); |
2391 | |
2392 | unwind_plan.SetSourceName("unit testing hand-created unwind plan" ); |
2393 | unwind_plan.SetPlanValidAddressRanges({sample_range}); |
2394 | unwind_plan.SetRegisterKind(eRegisterKindLLDB); |
2395 | |
2396 | { |
2397 | UnwindPlan::Row row; |
2398 | |
2399 | // Describe offset 0 |
2400 | row.SetOffset(0); |
2401 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_esp, offset: 4); |
2402 | regloc.SetAtCFAPlusOffset(-4); |
2403 | row.SetRegisterInfo(reg_num: k_eip, register_location: regloc); |
2404 | unwind_plan.AppendRow(row); |
2405 | |
2406 | // Describe offset 1 |
2407 | row.SetOffset(1); |
2408 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_esp, offset: 8); |
2409 | regloc.SetAtCFAPlusOffset(-8); |
2410 | row.SetRegisterInfo(reg_num: k_ebp, register_location: regloc); |
2411 | unwind_plan.AppendRow(row); |
2412 | |
2413 | // Describe offset 3 |
2414 | row.SetOffset(3); |
2415 | row.GetCFAValue().SetIsRegisterPlusOffset(reg_num: k_ebp, offset: 8); |
2416 | unwind_plan.AppendRow(row); |
2417 | } |
2418 | |
2419 | RegisterContextSP reg_ctx_sp; |
2420 | EXPECT_TRUE(engine32->AugmentUnwindPlanFromCallSite( |
2421 | data, sizeof(data), sample_range, unwind_plan, reg_ctx_sp)); |
2422 | |
2423 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 5); |
2424 | EXPECT_EQ(5, row->GetOffset()); |
2425 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
2426 | EXPECT_EQ(4, row->GetCFAValue().GetOffset()); |
2427 | |
2428 | // x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite |
2429 | // doesn't track register restores (pop'ing a reg value back from |
2430 | // the stack) - it was just written to make stepping work correctly. |
2431 | // Technically we should be able to do the following test, but it |
2432 | // won't work today - the unwind plan will still say that the caller's |
2433 | // ebp is on the stack. |
2434 | // EXPECT_FALSE(row->GetRegisterInfo(k_ebp, regloc)); |
2435 | } |
2436 | |
2437 | // Check that the i386 disassembler disassembles past an opcode that |
2438 | // is only valid in 32-bit mode (non-long mode), and the x86_64 disassembler |
2439 | // stops |
2440 | // disassembling at that point (long-mode). |
2441 | TEST_F(Testx86AssemblyInspectionEngine, Test32BitOnlyInstruction) { |
2442 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2443 | const UnwindPlan::Row *row; |
2444 | AddressRange sample_range; |
2445 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2446 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2447 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2448 | |
2449 | uint8_t data[] = { |
2450 | 0x43, // incl $ebx --- an invalid opcode in 64-bit mode |
2451 | 0x55, // pushl %ebp |
2452 | 0x90 // nop |
2453 | }; |
2454 | |
2455 | sample_range = AddressRange(0x1000, sizeof(data)); |
2456 | |
2457 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2458 | data, sizeof(data), sample_range, unwind_plan)); |
2459 | |
2460 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2461 | EXPECT_EQ(2, row->GetOffset()); |
2462 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
2463 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2464 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2465 | |
2466 | EXPECT_TRUE(row->GetRegisterInfo(k_ebp, regloc)); |
2467 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2468 | EXPECT_EQ(-8, regloc.GetOffset()); |
2469 | |
2470 | unwind_plan.Clear(); |
2471 | |
2472 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
2473 | data, sizeof(data), sample_range, unwind_plan)); |
2474 | |
2475 | row = unwind_plan.GetRowForFunctionOffset(offset: 2); |
2476 | EXPECT_EQ(0, row->GetOffset()); |
2477 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2478 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2479 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2480 | |
2481 | EXPECT_FALSE(row->GetRegisterInfo(k_rbp, regloc)); |
2482 | } |
2483 | |
2484 | TEST_F(Testx86AssemblyInspectionEngine, TestStackRealign8BitDisp_i386) { |
2485 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
2486 | |
2487 | uint8_t data[] = { |
2488 | 0x55, // pushl %ebp |
2489 | 0x89, 0xe5, // movl %esp, %ebp |
2490 | 0x53, // pushl %ebx |
2491 | 0x83, 0xe4, 0xf0, // andl $-16, %esp |
2492 | 0x83, 0xec, 0x10, // subl $16, %esp |
2493 | 0x8d, 0x65, 0xfc, // leal -4(%ebp), %esp |
2494 | 0x5b, // popl %ebx |
2495 | 0x5d, // popl %ebp |
2496 | 0xc3, // retl |
2497 | }; |
2498 | |
2499 | AddressRange sample_range(0x1000, sizeof(data)); |
2500 | UnwindPlan plan(eRegisterKindLLDB); |
2501 | ASSERT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly(data, sizeof(data), |
2502 | sample_range, plan)); |
2503 | |
2504 | UnwindPlan::Row::FAValue esp_plus_4, esp_plus_8, ebp_plus_8; |
2505 | esp_plus_4.SetIsRegisterPlusOffset(reg_num: k_esp, offset: 4); |
2506 | esp_plus_8.SetIsRegisterPlusOffset(reg_num: k_esp, offset: 8); |
2507 | ebp_plus_8.SetIsRegisterPlusOffset(reg_num: k_ebp, offset: 8); |
2508 | |
2509 | EXPECT_EQ(esp_plus_4, plan.GetRowForFunctionOffset(0)->GetCFAValue()); |
2510 | EXPECT_EQ(esp_plus_8, plan.GetRowForFunctionOffset(1)->GetCFAValue()); |
2511 | for (size_t i = 3; i < sizeof(data) - 2; ++i) |
2512 | EXPECT_EQ(ebp_plus_8, plan.GetRowForFunctionOffset(i)->GetCFAValue()) |
2513 | << "i: " << i; |
2514 | EXPECT_EQ(esp_plus_4, |
2515 | plan.GetRowForFunctionOffset(sizeof(data) - 1)->GetCFAValue()); |
2516 | } |
2517 | |
2518 | TEST_F(Testx86AssemblyInspectionEngine, TestStackRealign32BitDisp_x86_64) { |
2519 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
2520 | |
2521 | uint8_t data[] = { |
2522 | 0x55, // pushq %rbp |
2523 | 0x48, 0x89, 0xe5, // movq %rsp, %rbp |
2524 | 0x53, // pushl %rbx |
2525 | 0x48, 0x83, 0xe4, 0xf0, // andq $-16, %rsp |
2526 | 0x48, 0x81, 0xec, 0x00, 0x01, 0x00, 0x00, // subq $256, %rsp |
2527 | 0x48, 0x8d, 0x65, 0xf8, // leaq -8(%rbp), %rsp |
2528 | 0x5b, // popq %rbx |
2529 | 0x5d, // popq %rbp |
2530 | 0xc3, // retq |
2531 | }; |
2532 | |
2533 | AddressRange sample_range(0x1000, sizeof(data)); |
2534 | UnwindPlan plan(eRegisterKindLLDB); |
2535 | ASSERT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly(data, sizeof(data), |
2536 | sample_range, plan)); |
2537 | |
2538 | UnwindPlan::Row::FAValue rsp_plus_8, rsp_plus_16, rbp_plus_16; |
2539 | rsp_plus_8.SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 8); |
2540 | rsp_plus_16.SetIsRegisterPlusOffset(reg_num: k_rsp, offset: 16); |
2541 | rbp_plus_16.SetIsRegisterPlusOffset(reg_num: k_rbp, offset: 16); |
2542 | |
2543 | EXPECT_EQ(rsp_plus_8, plan.GetRowForFunctionOffset(0)->GetCFAValue()); |
2544 | EXPECT_EQ(rsp_plus_16, plan.GetRowForFunctionOffset(1)->GetCFAValue()); |
2545 | for (size_t i = 4; i < sizeof(data) - 2; ++i) |
2546 | EXPECT_EQ(rbp_plus_16, plan.GetRowForFunctionOffset(i)->GetCFAValue()) |
2547 | << "i: " << i; |
2548 | EXPECT_EQ(rsp_plus_8, |
2549 | plan.GetRowForFunctionOffset(sizeof(data) - 1)->GetCFAValue()); |
2550 | } |
2551 | |
2552 | TEST_F(Testx86AssemblyInspectionEngine, TestStackRealignMSVC_i386) { |
2553 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Geti386Inspector(); |
2554 | |
2555 | uint8_t data[] = { |
2556 | 0x53, // offset 00 -- pushl %ebx |
2557 | 0x8b, 0xdc, // offset 01 -- movl %esp, %ebx |
2558 | 0x83, 0xec, 0x08, // offset 03 -- subl $8, %esp |
2559 | 0x81, 0xe4, 0x00, 0xff, 0xff, 0xff, // offset 06 -- andl $-256, %esp |
2560 | 0x83, 0xc4, 0x04, // offset 12 -- addl $4, %esp |
2561 | 0x55, // offset 15 -- pushl %ebp |
2562 | 0x8b, 0xec, // offset 16 -- movl %esp, %ebp |
2563 | 0x81, 0xec, 0x00, 0x02, 0x00, 0x00, // offset 18 -- subl $512, %esp |
2564 | 0x89, 0x7d, 0xfc, // offset 24 -- movl %edi, -4(%ebp) |
2565 | 0x8b, 0xe5, // offset 27 -- movl %ebp, %esp |
2566 | 0x5d, // offset 29 -- popl %ebp |
2567 | 0x8b, 0xe3, // offset 30 -- movl %ebx, %esp |
2568 | 0x5b, // offset 32 -- popl %ebx |
2569 | 0xc3 // offset 33 -- retl |
2570 | }; |
2571 | |
2572 | AddressRange sample_range(0x1000, sizeof(data)); |
2573 | UnwindPlan plan(eRegisterKindLLDB); |
2574 | ASSERT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly(data, sizeof(data), |
2575 | sample_range, plan)); |
2576 | |
2577 | UnwindPlan::Row::FAValue esp_minus_4, esp_plus_0, esp_plus_4, esp_plus_8, |
2578 | ebx_plus_8, ebp_plus_0; |
2579 | esp_minus_4.SetIsRegisterPlusOffset(reg_num: k_esp, offset: -4); |
2580 | esp_plus_0.SetIsRegisterPlusOffset(reg_num: k_esp, offset: 0); |
2581 | esp_plus_4.SetIsRegisterPlusOffset(reg_num: k_esp, offset: 4); |
2582 | esp_plus_8.SetIsRegisterPlusOffset(reg_num: k_esp, offset: 8); |
2583 | ebx_plus_8.SetIsRegisterPlusOffset(reg_num: k_ebx, offset: 8); |
2584 | ebp_plus_0.SetIsRegisterPlusOffset(reg_num: k_ebp, offset: 0); |
2585 | |
2586 | // Test CFA |
2587 | EXPECT_EQ(esp_plus_4, plan.GetRowForFunctionOffset(0)->GetCFAValue()); |
2588 | EXPECT_EQ(esp_plus_8, plan.GetRowForFunctionOffset(1)->GetCFAValue()); |
2589 | for (size_t i = 3; i < 33; ++i) |
2590 | EXPECT_EQ(ebx_plus_8, plan.GetRowForFunctionOffset(i)->GetCFAValue()) |
2591 | << "i: " << i; |
2592 | EXPECT_EQ(esp_plus_4, plan.GetRowForFunctionOffset(33)->GetCFAValue()); |
2593 | |
2594 | // Test AFA |
2595 | EXPECT_EQ(esp_plus_0, plan.GetRowForFunctionOffset(12)->GetAFAValue()); |
2596 | EXPECT_EQ(esp_minus_4, plan.GetRowForFunctionOffset(15)->GetAFAValue()); |
2597 | EXPECT_EQ(esp_plus_0, plan.GetRowForFunctionOffset(16)->GetAFAValue()); |
2598 | for (size_t i = 18; i < 30; ++i) |
2599 | EXPECT_EQ(ebp_plus_0, plan.GetRowForFunctionOffset(i)->GetAFAValue()) |
2600 | << "i: " << i; |
2601 | EXPECT_EQ(esp_minus_4, plan.GetRowForFunctionOffset(30)->GetAFAValue()); |
2602 | |
2603 | // Test saved register |
2604 | UnwindPlan::Row::AbstractRegisterLocation reg_loc; |
2605 | EXPECT_TRUE( |
2606 | plan.GetRowForFunctionOffset(27)->GetRegisterInfo(k_edi, reg_loc)); |
2607 | EXPECT_TRUE(reg_loc.IsAtAFAPlusOffset()); |
2608 | EXPECT_EQ(-4, reg_loc.GetOffset()); |
2609 | } |
2610 | |
2611 | // Give the disassembler random bytes to test that it doesn't exceed |
2612 | // the bounds of the array when run under clang's address sanitizer. |
2613 | TEST_F(Testx86AssemblyInspectionEngine, TestDisassemblyJunkBytes) { |
2614 | AddressRange sample_range; |
2615 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2616 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2617 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2618 | |
2619 | uint8_t data[] = { |
2620 | 0x10, 0x10, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, |
2621 | 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 }; |
2622 | |
2623 | sample_range = AddressRange(0x1000, sizeof(data)); |
2624 | |
2625 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2626 | data, sizeof(data), sample_range, unwind_plan)); |
2627 | |
2628 | unwind_plan.Clear(); |
2629 | |
2630 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
2631 | data, sizeof(data), sample_range, unwind_plan)); |
2632 | |
2633 | } |
2634 | |
2635 | TEST_F(Testx86AssemblyInspectionEngine, TestReturnDetect) { |
2636 | std::unique_ptr<x86AssemblyInspectionEngine> engine = Getx86_64Inspector(); |
2637 | |
2638 | // Single fragment with all four return forms. |
2639 | // We want to verify that the unwind state is reset after each ret. |
2640 | uint8_t data[] = { |
2641 | 0x55, // offset 0 -- pushq %rbp |
2642 | 0x48, 0x89, 0xe5, // offset 1 -- movq %rsp, %rbp |
2643 | 0x31, 0xc0, // offset 4 -- xorl %eax, %eax |
2644 | 0x5d, // offset 6 -- popq %rbp |
2645 | 0xc3, // offset 7 -- retq |
2646 | 0x31, 0xc0, // offset 8 -- xorl %eax, %eax |
2647 | 0x5d, // offset 10 -- popq %rbp |
2648 | 0xcb, // offset 11 -- retf |
2649 | 0x31, 0xc0, // offset 12 -- xorl %eax, %eax |
2650 | 0x5d, // offset 14 -- popq %rbp |
2651 | 0xc2, 0x22, 0x11, // offset 15 -- retq 0x1122 |
2652 | 0x31, 0xc0, // offset 18 -- xorl %eax, %eax |
2653 | 0x5d, // offset 20 -- popq %rbp |
2654 | 0xca, 0x44, 0x33, // offset 21 -- retf 0x3344 |
2655 | 0x31, 0xc0, // offset 24 -- xorl %eax, %eax |
2656 | }; |
2657 | |
2658 | AddressRange sample_range(0x1000, sizeof(data)); |
2659 | |
2660 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2661 | EXPECT_TRUE(engine->GetNonCallSiteUnwindPlanFromAssembly( |
2662 | data, sizeof(data), sample_range, unwind_plan)); |
2663 | |
2664 | // Expect following unwind rows: |
2665 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2666 | // 1: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2667 | // 4: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2668 | // 7: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2669 | // 8: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2670 | // 11: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2671 | // 12: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2672 | // 15: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2673 | // 18: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2674 | // 21: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2675 | // 24: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2676 | |
2677 | EXPECT_TRUE(unwind_plan.GetInitialCFARegister() == k_rsp); |
2678 | EXPECT_TRUE(unwind_plan.GetUnwindPlanValidAtAllInstructions() == |
2679 | eLazyBoolYes); |
2680 | EXPECT_TRUE(unwind_plan.GetSourcedFromCompiler() == eLazyBoolNo); |
2681 | |
2682 | UnwindPlan::Row::AbstractRegisterLocation regloc; |
2683 | |
2684 | // 0: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2685 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 0); |
2686 | EXPECT_EQ(0, row->GetOffset()); |
2687 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2688 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2689 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2690 | |
2691 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2692 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2693 | EXPECT_EQ(-8, regloc.GetOffset()); |
2694 | |
2695 | // 1: CFA=rsp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2696 | row = unwind_plan.GetRowForFunctionOffset(offset: 1); |
2697 | EXPECT_EQ(1, row->GetOffset()); |
2698 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2699 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2700 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2701 | |
2702 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2703 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2704 | EXPECT_EQ(-8, regloc.GetOffset()); |
2705 | |
2706 | // 4: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2707 | row = unwind_plan.GetRowForFunctionOffset(offset: 4); |
2708 | EXPECT_EQ(4, row->GetOffset()); |
2709 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2710 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2711 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2712 | |
2713 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2714 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2715 | EXPECT_EQ(-8, regloc.GetOffset()); |
2716 | |
2717 | // 7: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2718 | row = unwind_plan.GetRowForFunctionOffset(offset: 7); |
2719 | EXPECT_EQ(7, row->GetOffset()); |
2720 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2721 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2722 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2723 | |
2724 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2725 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2726 | EXPECT_EQ(-8, regloc.GetOffset()); |
2727 | |
2728 | // 8: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2729 | row = unwind_plan.GetRowForFunctionOffset(offset: 8); |
2730 | EXPECT_EQ(8, row->GetOffset()); |
2731 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2732 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2733 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2734 | |
2735 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2736 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2737 | EXPECT_EQ(-8, regloc.GetOffset()); |
2738 | |
2739 | // 11: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2740 | row = unwind_plan.GetRowForFunctionOffset(offset: 11); |
2741 | EXPECT_EQ(11, row->GetOffset()); |
2742 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2743 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2744 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2745 | |
2746 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2747 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2748 | EXPECT_EQ(-8, regloc.GetOffset()); |
2749 | |
2750 | // 12: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2751 | row = unwind_plan.GetRowForFunctionOffset(offset: 12); |
2752 | EXPECT_EQ(12, row->GetOffset()); |
2753 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2754 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2755 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2756 | |
2757 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2758 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2759 | EXPECT_EQ(-8, regloc.GetOffset()); |
2760 | |
2761 | // 15: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2762 | row = unwind_plan.GetRowForFunctionOffset(offset: 15); |
2763 | EXPECT_EQ(15, row->GetOffset()); |
2764 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2765 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2766 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2767 | |
2768 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2769 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2770 | EXPECT_EQ(-8, regloc.GetOffset()); |
2771 | |
2772 | // 18: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2773 | row = unwind_plan.GetRowForFunctionOffset(offset: 18); |
2774 | EXPECT_EQ(18, row->GetOffset()); |
2775 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2776 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2777 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2778 | |
2779 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2780 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2781 | EXPECT_EQ(-8, regloc.GetOffset()); |
2782 | |
2783 | // 21: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2784 | row = unwind_plan.GetRowForFunctionOffset(offset: 21); |
2785 | EXPECT_EQ(21, row->GetOffset()); |
2786 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2787 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2788 | EXPECT_EQ(8, row->GetCFAValue().GetOffset()); |
2789 | |
2790 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2791 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2792 | EXPECT_EQ(-8, regloc.GetOffset()); |
2793 | |
2794 | // 24: CFA=rbp+16 => rbp=[CFA-16] rsp=CFA+0 rip=[CFA-8] |
2795 | row = unwind_plan.GetRowForFunctionOffset(offset: 24); |
2796 | EXPECT_EQ(24, row->GetOffset()); |
2797 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2798 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2799 | EXPECT_EQ(16, row->GetCFAValue().GetOffset()); |
2800 | |
2801 | EXPECT_TRUE(row->GetRegisterInfo(k_rip, regloc)); |
2802 | EXPECT_TRUE(regloc.IsAtCFAPlusOffset()); |
2803 | EXPECT_EQ(-8, regloc.GetOffset()); |
2804 | } |
2805 | |
2806 | |
2807 | // Test mid-function epilogues - the unwind state post-prologue |
2808 | // should be re-instated. |
2809 | |
2810 | TEST_F(Testx86AssemblyInspectionEngine, TestDisassemblyMidFunctionEpilogues) { |
2811 | AddressRange sample_range; |
2812 | UnwindPlan unwind_plan(eRegisterKindLLDB); |
2813 | std::unique_ptr<x86AssemblyInspectionEngine> engine32 = Geti386Inspector(); |
2814 | std::unique_ptr<x86AssemblyInspectionEngine> engine64 = Getx86_64Inspector(); |
2815 | |
2816 | uint8_t data[] = { |
2817 | 0x55, // <+0>: pushq %rbp |
2818 | 0x48, 0x89, 0xe5, // <+1>: movq %rsp, %rbp |
2819 | 0x48, 0x83, 0xec, 0x70, // <+4>: subq $0x70, %rsp |
2820 | 0x90, // <+8>: nop // prologue set up |
2821 | |
2822 | 0x74, 0x7, // <+9>: je 7 <+18> |
2823 | 0x48, 0x83, 0xc4, 0x70, // <+11>: addq $0x70, %rsp |
2824 | 0x5d, // <+15>: popq %rbp |
2825 | 0xff, 0xe0, // <+16>: jmpq *%rax // epilogue completed |
2826 | |
2827 | 0x90, // <+18>: nop // prologue setup back |
2828 | |
2829 | 0x74, 0x8, // <+19>: je 7 <+28> |
2830 | 0x48, 0x83, 0xc4, 0x70, // <+21>: addq $0x70, %rsp |
2831 | 0x5d, // <+25>: popq %rbp |
2832 | 0x90, // <+26>: nop // mid-epilogue non-epilogue |
2833 | 0xc3, // <+27>: retq // epilogue completed |
2834 | |
2835 | 0x90, // <+28>: nop // prologue setup back |
2836 | |
2837 | 0x48, 0x83, 0xc4, 0x70, // <+29>: addq $0x70, %rsp |
2838 | 0x5d, // <+33>: popq %rbp |
2839 | 0xc3, // <+34>: retq // epilogue completed |
2840 | |
2841 | }; |
2842 | |
2843 | sample_range = AddressRange(0x1000, sizeof(data)); |
2844 | |
2845 | int wordsize = 4; |
2846 | EXPECT_TRUE(engine32->GetNonCallSiteUnwindPlanFromAssembly( |
2847 | data, sizeof(data), sample_range, unwind_plan)); |
2848 | |
2849 | // Check that we've unwound the stack after the first mid-function epilogue |
2850 | // row: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
2851 | const UnwindPlan::Row *row = unwind_plan.GetRowForFunctionOffset(offset: 16); |
2852 | EXPECT_EQ(16, row->GetOffset()); |
2853 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
2854 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2855 | EXPECT_EQ(wordsize, row->GetCFAValue().GetOffset()); |
2856 | |
2857 | // Check that we've reinstated the stack frame setup |
2858 | // unwind instructions after a jmpq *%eax |
2859 | // row: CFA=ebp +8 => esp=CFA+0 eip=[CFA-8] |
2860 | row = unwind_plan.GetRowForFunctionOffset(offset: 18); |
2861 | EXPECT_EQ(18, row->GetOffset()); |
2862 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_ebp); |
2863 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2864 | EXPECT_EQ(wordsize * 2, row->GetCFAValue().GetOffset()); |
2865 | |
2866 | // Check that we've reinstated the stack frame setup |
2867 | // unwind instructions after a mid-function retq |
2868 | // row: CFA=ebp +8 => esp=CFA+0 eip=[CFA-8] |
2869 | row = unwind_plan.GetRowForFunctionOffset(offset: 28); |
2870 | EXPECT_EQ(28, row->GetOffset()); |
2871 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_ebp); |
2872 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2873 | EXPECT_EQ(wordsize * 2, row->GetCFAValue().GetOffset()); |
2874 | |
2875 | // After last instruction in the function, verify that |
2876 | // the stack frame has been unwound |
2877 | // row: CFA=esp +4 => esp=CFA+0 eip=[CFA-4] |
2878 | row = unwind_plan.GetRowForFunctionOffset(offset: 34); |
2879 | EXPECT_EQ(34, row->GetOffset()); |
2880 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_esp); |
2881 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2882 | EXPECT_EQ(wordsize, row->GetCFAValue().GetOffset()); |
2883 | |
2884 | unwind_plan.Clear(); |
2885 | |
2886 | wordsize = 8; |
2887 | EXPECT_TRUE(engine64->GetNonCallSiteUnwindPlanFromAssembly( |
2888 | data, sizeof(data), sample_range, unwind_plan)); |
2889 | |
2890 | // Check that we've unwound the stack after the first mid-function epilogue |
2891 | // row: CFA=rsp +8 => rsp=CFA+0 rip=[CFA-8] |
2892 | row = unwind_plan.GetRowForFunctionOffset(offset: 16); |
2893 | EXPECT_EQ(16, row->GetOffset()); |
2894 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2895 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2896 | EXPECT_EQ(wordsize, row->GetCFAValue().GetOffset()); |
2897 | |
2898 | // Check that we've reinstated the stack frame setup |
2899 | // unwind instructions after a jmpq *%eax |
2900 | // row: CFA=rbp+16 => rsp=CFA+0 rip=[CFA-16] |
2901 | row = unwind_plan.GetRowForFunctionOffset(offset: 18); |
2902 | EXPECT_EQ(18, row->GetOffset()); |
2903 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2904 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2905 | EXPECT_EQ(wordsize * 2, row->GetCFAValue().GetOffset()); |
2906 | |
2907 | // Check that we've reinstated the stack frame setup |
2908 | // unwind instructions after a mid-function retq |
2909 | // row: CFA=rbp+16 => rsp=CFA+0 rip=[CFA-16] |
2910 | row = unwind_plan.GetRowForFunctionOffset(offset: 28); |
2911 | EXPECT_EQ(28, row->GetOffset()); |
2912 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rbp); |
2913 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2914 | EXPECT_EQ(wordsize * 2, row->GetCFAValue().GetOffset()); |
2915 | |
2916 | // After last instruction in the function, verify that |
2917 | // the stack frame has been unwound |
2918 | // row: CFA=rsp +8 => esp=CFA+0 rip=[CFA-8] |
2919 | row = unwind_plan.GetRowForFunctionOffset(offset: 34); |
2920 | EXPECT_EQ(34, row->GetOffset()); |
2921 | EXPECT_TRUE(row->GetCFAValue().GetRegisterNumber() == k_rsp); |
2922 | EXPECT_TRUE(row->GetCFAValue().IsRegisterPlusOffset() == true); |
2923 | EXPECT_EQ(wordsize, row->GetCFAValue().GetOffset()); |
2924 | } |
2925 | |