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[Sanitizer] Print verbose warning if symbolizer can't read /proc/self/exe for some reason 

llvm-svn: 182374
This commit is contained in:
Alexey Samsonov 2013-05-21 12:22:36 +00:00
parent 2a250b8b49
commit 73565f7f5d
1 changed files with 4 additions and 1 deletions
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5
compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_linux_libcdep.cc
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@ -155,9 +155,12 @@ static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) {
// First module is the binary itself.
uptr module_name_len = internal_readlink(
"/proc/self/exe", module_name.data(), module_name.size());
if (internal_iserror(module_name_len)) {
int readlink_error;
if (internal_iserror(module_name_len, &readlink_error)) {
// We can't read /proc/self/exe for some reason, assume the name of the
// binary is unknown.
Report("WARNING: readlink(\"/proc/self/exe\") failed with errno %d, some "
"stack frames may not be symbolized\n", readlink_error);
module_name_len = internal_snprintf(module_name.data(),
module_name.size(), "/proc/self/exe");
}