29 lines
924 B
C++
29 lines
924 B
C++
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/*
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* This file is used to test dsymutil support for call site entries with tail
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* calls (DW_AT_call_pc).
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*
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* Instructions for regenerating binaries (on Darwin/x86_64):
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*
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* 1. Copy the source to a top-level directory to work around having absolute
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* paths in the symtab's OSO entries.
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*
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* mkdir -p /Inputs/ && cp tail-call.c /Inputs && cd /Inputs
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*
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* 2. Compile with call site info enabled. -O2 is used to get tail call
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* promotion.
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*
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* clang -g -O2 tail-call.c -c -o tail-call.macho.x86_64.o
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* clang tail-call.macho.x86_64.o -o tail-call.macho.x86_64
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*
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* 3. Copy the binaries back into the repo's Inputs directory. You'll need
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* -oso-prepend-path=%p to link.
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*/
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volatile int x;
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__attribute__((disable_tail_calls, noinline)) void func2() { x++; }
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__attribute__((noinline)) void func1() { func2(); /* tail */ }
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__attribute__((disable_tail_calls)) int main() { func1(); /* regular */ }
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