[tsan] Add global symbolication support into DlAddrSymbolizer

`DlAddrSymbolizer` is used on OS X when we're running inside a sandbox that prevents us from spawning an external symbolizer. This patch adds support for symbolication of globals (implements `SymbolizeData`) for `DlAddrSymbolizer`.

Differential Revision: http://reviews.llvm.org/D14613



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@252899 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/sanitizer_common/sanitizer_symbolizer_mac.cc b/lib/sanitizer_common/sanitizer_symbolizer_mac.cc
index aeaa09b0b..6d2a1bf81 100644
--- a/lib/sanitizer_common/sanitizer_symbolizer_mac.cc
+++ b/lib/sanitizer_common/sanitizer_symbolizer_mac.cc
@@ -37,8 +37,14 @@ bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
   return true;
 }
 
-bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *info) {
-  return false;
+bool DlAddrSymbolizer::SymbolizeData(uptr addr, DataInfo *datainfo) {
+  Dl_info info;
+  int result = dladdr((const void *)addr, &info);
+  if (!result) return false;
+  const char *demangled = DemangleCXXABI(info.dli_sname);
+  datainfo->name = internal_strdup(demangled);
+  datainfo->start = (uptr)info.dli_saddr;
+  return true;
 }
 
 class AtosSymbolizerProcess : public SymbolizerProcess {