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mac: Don’t try to demangle non-C++ symbols with the C++ demangler

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On Mac a C++ symbol has 1-4 underscore characters followed by a 'Z'.
Symbols that do not have this format (such as plain C symbols)
causes a lot of warnings to be printed.

Bug: chromium:1062556
Change-Id: I55977f756c7e20cc5e7b1cb8e38316d7bf1f748c
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2179482
Reviewed-by: Mark Mentovai <mark@chromium.org>
This commit is contained in:
Yngve N. Pettersen 2020-05-05 02:06:14 +02:00 committed by Mark Mentovai
parent a7b621f810
commit 2ffe116322
1 changed files with 12 additions and 0 deletions
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12
src/common/language.cc
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@ -79,6 +79,18 @@ class CPPLanguage: public Language {
demangled->clear(); demangled->clear();
return kDontDemangle; return kDontDemangle;
#else #else
#if defined(__APPLE__)
// Mac C++ symbols can have up to 4 underscores, followed by a "Z".
// Non-C++ symbols are not coded that way, but may have leading underscores.
// Attempting to demangle non-C++ symbols with the C++ demangler would print
// warnings and fail, so return kDontDemangle for these.
size_t i = mangled.find_first_not_of('_');
if (i == 0 || i == string::npos || i > 4 || mangled[i] != 'Z') {
demangled->clear();
return kDontDemangle;
}
#endif
int status; int status;
char* demangled_c = char* demangled_c =
abi::__cxa_demangle(mangled.c_str(), NULL, NULL, &status); abi::__cxa_demangle(mangled.c_str(), NULL, NULL, &status);