1//===-- OptionGroupFormat.cpp ---------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Interpreter/OptionGroupFormat.h"
10
11#include "lldb/Host/OptionParser.h"
12#include "lldb/Interpreter/CommandInterpreter.h"
13#include "lldb/Target/ExecutionContext.h"
14#include "lldb/Target/Target.h"
15
16using namespace lldb;
17using namespace lldb_private;
18
19static constexpr OptionDefinition g_default_option_definitions[] = {
20 {LLDB_OPT_SET_1, .required: false, .long_option: "format", .short_option: 'f', .option_has_arg: OptionParser::eRequiredArgument,
21 .validator: nullptr, .enum_values: {}, .completion_type: 0, .argument_type: eArgTypeFormat,
22 .usage_text: "Specify a format to be used for display."},
23 {LLDB_OPT_SET_2, .required: false, .long_option: "gdb-format", .short_option: 'G', .option_has_arg: OptionParser::eRequiredArgument,
24 .validator: nullptr, .enum_values: {}, .completion_type: 0, .argument_type: eArgTypeGDBFormat,
25 .usage_text: "Specify a format using a GDB format specifier string."},
26 {LLDB_OPT_SET_3, .required: false, .long_option: "size", .short_option: 's', .option_has_arg: OptionParser::eRequiredArgument,
27 .validator: nullptr, .enum_values: {}, .completion_type: 0, .argument_type: eArgTypeByteSize,
28 .usage_text: "The size in bytes to use when displaying with the selected format."},
29 {LLDB_OPT_SET_4, .required: false, .long_option: "count", .short_option: 'c', .option_has_arg: OptionParser::eRequiredArgument,
30 .validator: nullptr, .enum_values: {}, .completion_type: 0, .argument_type: eArgTypeCount,
31 .usage_text: "The number of total items to display."},
32};
33
34OptionGroupFormat::OptionGroupFormat(
35 lldb::Format default_format, uint64_t default_byte_size,
36 uint64_t default_count, OptionGroupFormatUsageTextVector usage_text_vector)
37 : m_format(default_format, default_format),
38 m_byte_size(default_byte_size, default_byte_size),
39 m_count(default_count, default_count), m_prev_gdb_format('x'),
40 m_prev_gdb_size('w'), m_has_gdb_format(false) {
41 // Copy the default option definitions.
42 std::copy(first: std::begin(arr: g_default_option_definitions),
43 last: std::end(arr: g_default_option_definitions),
44 result: std::begin(arr&: m_option_definitions));
45
46 for (auto usage_text_tuple : usage_text_vector) {
47 switch (std::get<0>(t&: usage_text_tuple)) {
48 case eArgTypeFormat:
49 m_option_definitions[0].usage_text = std::get<1>(t&: usage_text_tuple);
50 break;
51 case eArgTypeByteSize:
52 m_option_definitions[2].usage_text = std::get<1>(t&: usage_text_tuple);
53 break;
54 default:
55 llvm_unreachable("Unimplemented option");
56 }
57 }
58}
59
60llvm::ArrayRef<OptionDefinition> OptionGroupFormat::GetDefinitions() {
61 auto result = llvm::ArrayRef(m_option_definitions);
62 if (m_byte_size.GetDefaultValue() < UINT64_MAX) {
63 if (m_count.GetDefaultValue() < UINT64_MAX)
64 return result;
65 else
66 return result.take_front(N: 3);
67 }
68 return result.take_front(N: 2);
69}
70
71Status OptionGroupFormat::SetOptionValue(uint32_t option_idx,
72 llvm::StringRef option_arg,
73 ExecutionContext *execution_context) {
74 Status error;
75 const int short_option = m_option_definitions[option_idx].short_option;
76
77 switch (short_option) {
78 case 'f':
79 error = m_format.SetValueFromString(value: option_arg);
80 break;
81
82 case 'c':
83 if (m_count.GetDefaultValue() == 0) {
84 error = Status::FromErrorString(str: "--count option is disabled");
85 } else {
86 error = m_count.SetValueFromString(value: option_arg);
87 if (m_count.GetCurrentValue() == 0)
88 error = Status::FromErrorStringWithFormat(
89 format: "invalid --count option value '%s'", option_arg.str().c_str());
90 }
91 break;
92
93 case 's':
94 if (m_byte_size.GetDefaultValue() == 0) {
95 error = Status::FromErrorString(str: "--size option is disabled");
96 } else {
97 error = m_byte_size.SetValueFromString(value: option_arg);
98 if (m_byte_size.GetCurrentValue() == 0)
99 error = Status::FromErrorStringWithFormat(
100 format: "invalid --size option value '%s'", option_arg.str().c_str());
101 }
102 break;
103
104 case 'G': {
105 uint64_t count = 0;
106 llvm::StringRef gdb_format_str = option_arg;
107 gdb_format_str.consumeInteger(Radix: 0, Result&: count);
108
109 Format format = eFormatDefault;
110 uint32_t byte_size = 0;
111
112 while (!gdb_format_str.empty() &&
113 ParserGDBFormatLetter(execution_context, format_letter: gdb_format_str[0], format,
114 byte_size)) {
115 gdb_format_str = gdb_format_str.drop_front();
116 }
117
118 // We the first character of the "gdb_format_str" is not the
119 // NULL terminator, we didn't consume the entire string and
120 // something is wrong. Also, if none of the format, size or count was
121 // specified correctly, then abort.
122 if (!gdb_format_str.empty() ||
123 (format == eFormatInvalid && byte_size == 0 && count == 0)) {
124 // Nothing got set correctly
125 error = Status::FromErrorStringWithFormat(
126 format: "invalid gdb format string '%s'", option_arg.str().c_str());
127 return error;
128 }
129
130 // At least one of the format, size or count was set correctly. Anything
131 // that wasn't set correctly should be set to the previous default
132 if (format == eFormatInvalid)
133 ParserGDBFormatLetter(execution_context, format_letter: m_prev_gdb_format, format,
134 byte_size);
135
136 const bool byte_size_enabled = m_byte_size.GetDefaultValue() < UINT64_MAX;
137 const bool count_enabled = m_count.GetDefaultValue() < UINT64_MAX;
138 if (byte_size_enabled) {
139 // Byte size is enabled
140 if (byte_size == 0)
141 ParserGDBFormatLetter(execution_context, format_letter: m_prev_gdb_size, format,
142 byte_size);
143 } else {
144 // Byte size is disabled, make sure it wasn't specified but if this is an
145 // address, it's actually necessary to specify one so don't error out
146 if (byte_size > 0 && format != lldb::eFormatAddressInfo) {
147 error = Status::FromErrorString(
148 str: "this command doesn't support specifying a byte size");
149 return error;
150 }
151 }
152
153 if (count_enabled) {
154 // Count is enabled and was not set, set it to the default for gdb format
155 // statements (which is 1).
156 if (count == 0)
157 count = 1;
158 } else {
159 // Count is disabled, make sure it wasn't specified
160 if (count > 0) {
161 error = Status::FromErrorString(
162 str: "this command doesn't support specifying a count");
163 return error;
164 }
165 }
166
167 m_format.SetCurrentValue(format);
168 m_format.SetOptionWasSet();
169 if (byte_size_enabled) {
170 m_byte_size.SetCurrentValue(byte_size);
171 m_byte_size.SetOptionWasSet();
172 }
173 if (count_enabled) {
174 m_count.SetCurrentValue(count);
175 m_count.SetOptionWasSet();
176 }
177 } break;
178
179 default:
180 llvm_unreachable("Unimplemented option");
181 }
182
183 return error;
184}
185
186bool OptionGroupFormat::ParserGDBFormatLetter(
187 ExecutionContext *execution_context, char format_letter, Format &format,
188 uint32_t &byte_size) {
189 m_has_gdb_format = true;
190 switch (format_letter) {
191 case 'o':
192 format = eFormatOctal;
193 m_prev_gdb_format = format_letter;
194 return true;
195 case 'x':
196 format = eFormatHex;
197 m_prev_gdb_format = format_letter;
198 return true;
199 case 'd':
200 format = eFormatDecimal;
201 m_prev_gdb_format = format_letter;
202 return true;
203 case 'u':
204 format = eFormatUnsigned;
205 m_prev_gdb_format = format_letter;
206 return true;
207 case 't':
208 format = eFormatBinary;
209 m_prev_gdb_format = format_letter;
210 return true;
211 case 'f':
212 format = eFormatFloat;
213 m_prev_gdb_format = format_letter;
214 return true;
215 case 'a':
216 format = eFormatAddressInfo;
217 {
218 TargetSP target_sp =
219 execution_context ? execution_context->GetTargetSP() : TargetSP();
220 if (target_sp)
221 byte_size = target_sp->GetArchitecture().GetAddressByteSize();
222 m_prev_gdb_format = format_letter;
223 return true;
224 }
225 case 'i':
226 format = eFormatInstruction;
227 m_prev_gdb_format = format_letter;
228 return true;
229 case 'c':
230 format = eFormatChar;
231 m_prev_gdb_format = format_letter;
232 return true;
233 case 's':
234 format = eFormatCString;
235 m_prev_gdb_format = format_letter;
236 return true;
237 case 'T':
238 format = eFormatOSType;
239 m_prev_gdb_format = format_letter;
240 return true;
241 case 'A':
242 format = eFormatHexFloat;
243 m_prev_gdb_format = format_letter;
244 return true;
245
246 case 'b':
247 case 'h':
248 case 'w':
249 case 'g':
250 {
251 // Size isn't used for printing instructions, so if a size is specified,
252 // and the previous format was 'i', then we should reset it to the
253 // default ('x'). Otherwise we'll continue to print as instructions,
254 // which isn't expected.
255 if (format_letter == 'b')
256 byte_size = 1;
257 else if (format_letter == 'h')
258 byte_size = 2;
259 else if (format_letter == 'w')
260 byte_size = 4;
261 else if (format_letter == 'g')
262 byte_size = 8;
263
264 m_prev_gdb_size = format_letter;
265 if (m_prev_gdb_format == 'i')
266 m_prev_gdb_format = 'x';
267 return true;
268 }
269 break;
270 default:
271 break;
272 }
273
274
275 return false;
276}
277
278void OptionGroupFormat::OptionParsingStarting(
279 ExecutionContext *execution_context) {
280 m_format.Clear();
281 m_byte_size.Clear();
282 m_count.Clear();
283 m_has_gdb_format = false;
284}
285

Provided by KDAB

Privacy Policy
Update your C++ knowledge – Modern C++11/14/17 Training
Find out more

source code of lldb/source/Interpreter/OptionGroupFormat.cpp