[sanitizer_common] Fuchsia-specific symbolizer

Summary:
Fuchsia doesn't support built-in symbolization per se at all.
Instead, it always emits a Fuchsia-standard "symbolizer markup"
format that makes it possible for a post-processing filter to
massage the logs into symbolized format.  Hence, it does not
support user-specified formatting options for backtraces or other
symbolization.

Reviewers: vitalybuka, alekseyshl, kcc

Subscribers: kubamracek, mgorny, phosek, filcab, llvm-commits

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D36032

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@309760 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 9 deletions

diff --git a/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc b/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
index 614470a63..ba226e84c 100644
--- a/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
+++ b/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
@@ -17,6 +17,18 @@
 
 namespace __sanitizer {
 
+Symbolizer *Symbolizer::GetOrInit() {
+  SpinMutexLock l(&init_mu_);
+  if (symbolizer_)
+    return symbolizer_;
+  symbolizer_ = PlatformInit();
+  CHECK(symbolizer_);
+  return symbolizer_;
+}
+
+// See sanitizer_symbolizer_fuchsia.cc.
+#if !SANITIZER_FUCHSIA
+
 const char *ExtractToken(const char *str, const char *delims, char **result) {
   uptr prefix_len = internal_strcspn(str, delims);
   *result = (char*)InternalAlloc(prefix_len + 1);
@@ -175,15 +187,6 @@ const LoadedModule *Symbolizer::FindModuleForAddress(uptr address) {
   return 0;
 }
 
-Symbolizer *Symbolizer::GetOrInit() {
-  SpinMutexLock l(&init_mu_);
-  if (symbolizer_)
-    return symbolizer_;
-  symbolizer_ = PlatformInit();
-  CHECK(symbolizer_);
-  return symbolizer_;
-}
-
 // For now we assume the following protocol:
 // For each request of the form
 //   <module_name> <module_offset>
@@ -472,4 +475,6 @@ bool SymbolizerProcess::WriteToSymbolizer(const char *buffer, uptr length) {
   return true;
 }
 
+#endif  // !SANITIZER_FUCHSIA
+
 }  // namespace __sanitizer