From d8b0630027ee12502ee16932ff22b865ed738594 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Wed, 9 Sep 2009 12:09:08 +0000 Subject: [PATCH] Add a shortcut for OS X to Path::GetMainExecutable. This gives a nice speedup on clang's testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81333 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/System/Unix/Path.inc | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc index d7aa7115cad..89285b48132 100644 --- a/lib/System/Unix/Path.inc +++ b/lib/System/Unix/Path.inc @@ -57,6 +57,10 @@ #include #endif +#ifdef __APPLE__ +#include +#endif + // Put in a hack for Cygwin which falsely reports that the mkdtemp function // is available when it is not. #ifdef __CYGWIN__ @@ -336,7 +340,17 @@ getprogpath(char ret[PATH_MAX], const char *bin) /// GetMainExecutable - Return the path to the main executable, given the /// value of argv[0] from program startup. Path Path::GetMainExecutable(const char *argv0, void *MainAddr) { -#if defined(__FreeBSD__) +#if defined(__APPLE__) + // On OS X the executable path is saved to the stack by dyld. Reading it + // from there is much faster than calling dladdr, especially for large + // binaries with symbols. + char exe_path[MAXPATHLEN]; + uint32_t size = sizeof(exe_path); + if (_NSGetExecutablePath(exe_path, &size) == 0) { + char link_path[MAXPATHLEN]; + return Path(std::string(realpath(exe_path, link_path))); + } +#elif defined(__FreeBSD__) char exe_path[PATH_MAX]; if (getprogpath(exe_path, argv0) != NULL)