[Sanitizer] Get rid of Symbolizer::Get() and Symbolizer::GetOrNull().

We may as well just use Symbolizer::GetOrInit() in all the cases.
Don't call Symbolizer::Get() early in tools initialization: these days
it doesn't do any important setup work, and we may as well create the
symbolizer the first time it's actually needed.

llvm-svn: 217558

compiler-rt/lib/asan/asan_report.cc

@@ -200,7 +200,7 @@ static const char *MaybeDemangleGlobalName(const char *name) {
   else if (SANITIZER_WINDOWS && name[0] == '\01' && name[1] == '?')
     should_demangle = true;
 
-  return should_demangle ? Symbolizer::Get()->Demangle(name) : name;
+  return should_demangle ? Symbolizer::GetOrInit()->Demangle(name) : name;
 }
 
 // Check if the global is a zero-terminated ASCII string. If so, print it.

compiler-rt/lib/asan/asan_rtl.cc

@@ -646,12 +646,8 @@ static void AsanInitInternal() {
   AsanTSDInit(PlatformTSDDtor);
   InstallDeadlySignalHandlers(AsanOnSIGSEGV);
 
-  // Allocator should be initialized before starting external symbolizer, as
-  // fork() on Mac locks the allocator.
   InitializeAllocator();
 
-  Symbolizer::GetOrInit();
-
   // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
   // should be set to 1 prior to initializing the threads.
   asan_inited = 1;

compiler-rt/lib/lsan/lsan.cc

@@ -50,8 +50,6 @@ extern "C" void __lsan_init() {
   ThreadStart(tid, GetTid());
   SetCurrentThread(tid);
 
-  Symbolizer::GetOrInit();
-
   if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
     Atexit(DoLeakCheck);
   lsan_inited = true;

compiler-rt/lib/lsan/lsan_common.cc

@@ -462,8 +462,8 @@ static Suppression *GetSuppressionForAddr(uptr addr) {
   // Suppress by module name.
   const char *module_name;
   uptr module_offset;
-  if (Symbolizer::Get()->GetModuleNameAndOffsetForPC(addr, &module_name,
+  if (Symbolizer::GetOrInit()
-                                                     &module_offset) &&
+          ->GetModuleNameAndOffsetForPC(addr, &module_name, &module_offset) &&
       SuppressionContext::Get()->Match(module_name, SuppressionLeak, &s))
     return s;
 
@@ -471,7 +471,7 @@ static Suppression *GetSuppressionForAddr(uptr addr) {
   static const uptr kMaxAddrFrames = 16;
   InternalScopedBuffer<AddressInfo> addr_frames(kMaxAddrFrames);
   for (uptr i = 0; i < kMaxAddrFrames; i++) new (&addr_frames[i]) AddressInfo();
-  uptr addr_frames_num = Symbolizer::Get()->SymbolizePC(
+  uptr addr_frames_num = Symbolizer::GetOrInit()->SymbolizePC(
       addr, addr_frames.data(), kMaxAddrFrames);
   for (uptr i = 0; i < addr_frames_num; i++) {
     if (SuppressionContext::Get()->Match(addr_frames[i].function,

compiler-rt/lib/sanitizer_common/sanitizer_common.cc

@@ -14,8 +14,6 @@
 #include "sanitizer_common.h"
 #include "sanitizer_flags.h"
 #include "sanitizer_libc.h"
-#include "sanitizer_stacktrace.h"
-#include "sanitizer_symbolizer.h"
 
 namespace __sanitizer {
 
@@ -197,21 +195,6 @@ void ReportErrorSummary(const char *error_type, const char *file,
   ReportErrorSummary(buff.data());
 }
 
-void ReportErrorSummary(const char *error_type, StackTrace *stack) {
-  if (!common_flags()->print_summary)
-    return;
-  AddressInfo ai;
-#if !SANITIZER_GO
-  if (stack->size > 0 && Symbolizer::Get()->CanReturnFileLineInfo()) {
-    // Currently, we include the first stack frame into the report summary.
-    // Maybe sometimes we need to choose another frame (e.g. skip memcpy/etc).
-    uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]);
-    Symbolizer::Get()->SymbolizePC(pc, &ai, 1);
-  }
-#endif
-  ReportErrorSummary(error_type, ai.file, ai.line, ai.function);
-}
-
 LoadedModule::LoadedModule(const char *module_name, uptr base_address) {
   full_name_ = internal_strdup(module_name);
   base_address_ = base_address;

compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cc

@@ -13,6 +13,8 @@
 
 #include "sanitizer_common.h"
 #include "sanitizer_flags.h"
+#include "sanitizer_stacktrace.h"
+#include "sanitizer_symbolizer.h"
 
 namespace __sanitizer {
 
@@ -47,6 +49,21 @@ void SetSandboxingCallback(void (*f)()) {
   sandboxing_callback = f;
 }
 
+void ReportErrorSummary(const char *error_type, StackTrace *stack) {
+  if (!common_flags()->print_summary)
+    return;
+  AddressInfo ai;
+#if !SANITIZER_GO
+  if (stack->size > 0 && Symbolizer::GetOrInit()->CanReturnFileLineInfo()) {
+    // Currently, we include the first stack frame into the report summary.
+    // Maybe sometimes we need to choose another frame (e.g. skip memcpy/etc).
+    uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]);
+    Symbolizer::GetOrInit()->SymbolizePC(pc, &ai, 1);
+  }
+#endif
+  ReportErrorSummary(error_type, ai.file, ai.line, ai.function);
+}
+
 }  // namespace __sanitizer
 
 void NOINLINE

compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc

@@ -423,8 +423,7 @@ void PrepareForSandboxing(__sanitizer_sandbox_arguments *args) {
   MemoryMappingLayout::CacheMemoryMappings();
   // Same for /proc/self/exe in the symbolizer.
 #if !SANITIZER_GO
-  if (Symbolizer *sym = Symbolizer::GetOrNull())
+  Symbolizer::GetOrInit()->PrepareForSandboxing();
-    sym->PrepareForSandboxing();
   CovPrepareForSandboxing(args);
 #endif
 }

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer.cc

@@ -22,17 +22,6 @@ Symbolizer *Symbolizer::symbolizer_;
 StaticSpinMutex Symbolizer::init_mu_;
 LowLevelAllocator Symbolizer::symbolizer_allocator_;
 
-Symbolizer *Symbolizer::GetOrNull() {
-  SpinMutexLock l(&init_mu_);
-  return symbolizer_;
-}
-
-Symbolizer *Symbolizer::Get() {
-  SpinMutexLock l(&init_mu_);
-  RAW_CHECK_MSG(symbolizer_ != 0, "Using uninitialized symbolizer!");
-  return symbolizer_;
-}
-
 Symbolizer *Symbolizer::Disable() {
   CHECK_EQ(0, symbolizer_);
   // Initialize a dummy symbolizer.

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer.h

@@ -72,12 +72,6 @@ struct DataInfo {
 
 class Symbolizer {
  public:
-  /// Returns platform-specific implementation of Symbolizer. The symbolizer
-  /// must be initialized (with init or disable) before calling this function.
-  static Symbolizer *Get();
-  /// Returns platform-specific implementation of Symbolizer, or null if not
-  /// initialized.
-  static Symbolizer *GetOrNull();
   /// Initialize and return platform-specific implementation of symbolizer
   /// (if it wasn't already initialized).
   static Symbolizer *GetOrInit();

compiler-rt/lib/tsan/rtl/tsan_symbolize.cc

@@ -111,7 +111,7 @@ ReportStack *SymbolizeCode(uptr addr) {
   InternalScopedBuffer<AddressInfo> addr_frames(kMaxAddrFrames);
   for (uptr i = 0; i < kMaxAddrFrames; i++)
     new(&addr_frames[i]) AddressInfo();
-  uptr addr_frames_num = Symbolizer::Get()->SymbolizePC(
+  uptr addr_frames_num = Symbolizer::GetOrInit()->SymbolizePC(
       addr, addr_frames.data(), kMaxAddrFrames);
   if (addr_frames_num == 0)
     return NewReportStackEntry(addr);
@@ -132,7 +132,7 @@ ReportStack *SymbolizeCode(uptr addr) {
 
 ReportLocation *SymbolizeData(uptr addr) {
   DataInfo info;
-  if (!Symbolizer::Get()->SymbolizeData(addr, &info))
+  if (!Symbolizer::GetOrInit()->SymbolizeData(addr, &info))
     return 0;
   ReportLocation *ent = (ReportLocation*)internal_alloc(MBlockReportStack,
                                                         sizeof(ReportLocation));
@@ -148,7 +148,7 @@ ReportLocation *SymbolizeData(uptr addr) {
 }
 
 void SymbolizeFlush() {
-  Symbolizer::Get()->Flush();
+  Symbolizer::GetOrInit()->Flush();
 }
 
 }  // namespace __tsan

compiler-rt/lib/ubsan/ubsan_diag.cc

@@ -63,7 +63,7 @@ Location __ubsan::getFunctionLocation(uptr Loc, const char **FName) {
   InitIfNecessary();
 
   AddressInfo Info;
-  if (!Symbolizer::Get()->SymbolizePC(Loc, &Info, 1) || !Info.module ||
+  if (!Symbolizer::GetOrInit()->SymbolizePC(Loc, &Info, 1) || !Info.module ||
       !*Info.module)
     return Location(Loc);
 
@@ -148,7 +148,7 @@ static void renderText(const char *Message, const Diag::Arg *Args) {
         Printf("%s", A.String);
         break;
       case Diag::AK_Mangled: {
-        Printf("'%s'", Symbolizer::Get()->Demangle(A.String));
+        Printf("'%s'", Symbolizer::GetOrInit()->Demangle(A.String));
         break;
       }
       case Diag::AK_SInt:

compiler-rt/lib/ubsan/ubsan_init.cc

@@ -39,7 +39,6 @@ void __ubsan::InitIfNecessary() {
     // in this function.
     SanitizerToolName = "UndefinedBehaviorSanitizer";
     InitializeCommonFlags();
-    Symbolizer::GetOrInit();
   }
   // Initialize UBSan-specific flags.
   InitializeFlags();