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[asan] add a new interface function __asan_describe_address, useful for running asan-ified binary under a debugger (e.g. gdb) 

llvm-svn: 171217
This commit is contained in:
Kostya Serebryany 2012-12-29 10:18:31 +00:00
parent db7325e56e
commit b3d04ede8c
3 changed files with 9 additions and 0 deletions
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4
compiler-rt/include/sanitizer/asan_interface.h
View File

@ -122,6 +122,10 @@ extern "C" {
uptr __asan_region_is_poisoned(uptr beg, uptr size) uptr __asan_region_is_poisoned(uptr beg, uptr size)
SANITIZER_INTERFACE_ATTRIBUTE; SANITIZER_INTERFACE_ATTRIBUTE;
// Print the description of addr (useful when debugging in gdb).
void __asan_describe_address(uptr addr)
SANITIZER_INTERFACE_ATTRIBUTE;
// This is an internal function that is called to report an error. // This is an internal function that is called to report an error.
// However it is still a part of the interface because users may want to // However it is still a part of the interface because users may want to
// set a breakpoint on this function in a debugger. // set a breakpoint on this function in a debugger.

4
compiler-rt/lib/asan/asan_report.cc
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@ -669,6 +669,10 @@ void NOINLINE __asan_set_error_report_callback(void (*callback)(const char*)) {
} }
} }
void __asan_describe_address(uptr addr) {
DescribeAddress(addr, 1);
}
#if !SANITIZER_SUPPORTS_WEAK_HOOKS #if !SANITIZER_SUPPORTS_WEAK_HOOKS
// Provide default implementation of __asan_on_error that does nothing // Provide default implementation of __asan_on_error that does nothing
// and may be overriden by user. // and may be overriden by user.

1
compiler-rt/lib/asan/asan_rtl.cc
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@ -254,6 +254,7 @@ static NOINLINE void force_interface_symbols() {
case 32: __asan_poison_stack_memory(0, 0); break; case 32: __asan_poison_stack_memory(0, 0); break;
case 33: __asan_unpoison_stack_memory(0, 0); break; case 33: __asan_unpoison_stack_memory(0, 0); break;
case 34: __asan_region_is_poisoned(0, 0); break; case 34: __asan_region_is_poisoned(0, 0); break;
case 35: __asan_describe_address(0); break;
} }
} }