| 1 | volatile int x; |
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| 2 | |
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| 3 | void __attribute__((noinline)) sink() { |
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| 4 | x++; //% self.filecheck("bt", "main.cpp", "-implicit-check-not=artificial") |
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| 5 | // CHECK: frame #0: 0x{{[0-9a-f]+}} a.out`sink() at main.cpp:[[@LINE-1]]:4 |
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| 6 | // CHECK-NEXT: frame #1: 0x{{[0-9a-f]+}} a.out`func3() at main.cpp:26:3 |
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| 7 | // CHECK-SAME: [artificial] |
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| 8 | // CHECK-NEXT: frame #2: 0x{{[0-9a-f]+}} a.out`func2() |
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| 9 | // CHECK-NEXT: frame #3: 0x{{[0-9a-f]+}} a.out`func1() at main.cpp:35:3 |
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| 10 | // CHECK-SAME: [artificial] |
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| 11 | // CHECK-NEXT: frame #4: 0x{{[0-9a-f]+}} a.out`main |
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| 12 | // In the GNU style, the artificial frames will point after the tail call |
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| 13 | // instruction. In v5 they should point to the instruction itself. |
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| 14 | //% frame1 = self.thread().GetFrameAtIndex(1) |
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| 15 | //% func3 = frame1.GetFunction() |
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| 16 | //% func3_insns = func3.GetInstructions(self.target()) |
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| 17 | //% self.trace("func3:\n%s"%func3_insns) |
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| 18 | //% last_insn = func3_insns.GetInstructionAtIndex(func3_insns.GetSize()-1) |
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| 19 | //% addr = last_insn.GetAddress() |
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| 20 | //% if "GNU" in self.name: addr.OffsetAddress(last_insn.GetByteSize()) |
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| 21 | //% self.assertEqual(frame1.GetPCAddress(), addr) |
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| 22 | } |
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| 23 | |
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| 24 | void __attribute__((noinline)) func3() { |
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| 25 | x++; |
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| 26 | sink(); /* tail */ |
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| 27 | } |
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| 28 | |
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| 29 | void __attribute__((disable_tail_calls, noinline)) func2() { |
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| 30 | func3(); /* regular */ |
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| 31 | } |
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| 32 | |
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| 33 | void __attribute__((noinline)) func1() { |
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| 34 | x++; |
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| 35 | func2(); /* tail */ |
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| 36 | } |
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| 37 | |
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| 38 | int __attribute__((disable_tail_calls)) main() { |
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| 39 | // DEBUG: self.runCmd("log enable lldb step -f /tmp/lldbstep.log") |
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| 40 | func1(); /* regular */ |
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| 41 | return 0; |
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| 42 | } |
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| 43 | |
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