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Add a shortcut for OS X to Path::GetMainExecutable. This gives a nice speedup on 

clang's testsuite.

llvm-svn: 81333
This commit is contained in:
Benjamin Kramer 2009-09-09 12:09:08 +00:00
parent 5cf21a9668
commit 2a1131a42f
1 changed files with 15 additions and 1 deletions
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16
llvm/lib/System/Unix/Path.inc
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@ -57,6 +57,10 @@
#include <dlfcn.h> #include <dlfcn.h>
#endif #endif
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
// Put in a hack for Cygwin which falsely reports that the mkdtemp function // Put in a hack for Cygwin which falsely reports that the mkdtemp function
// is available when it is not. // is available when it is not.
#ifdef __CYGWIN__ #ifdef __CYGWIN__
@ -336,7 +340,17 @@ getprogpath(char ret[PATH_MAX], const char *bin)
/// GetMainExecutable - Return the path to the main executable, given the /// GetMainExecutable - Return the path to the main executable, given the
/// value of argv[0] from program startup. /// value of argv[0] from program startup.
Path Path::GetMainExecutable(const char *argv0, void *MainAddr) { 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]; char exe_path[PATH_MAX];
if (getprogpath(exe_path, argv0) != NULL) if (getprogpath(exe_path, argv0) != NULL)