[NFC][sanitizer] Move SymbolizedStackHolder into sanitizer_common (llvm#77152)

And replace most `ClearAll()` uses.

Author: vitalybuka

compiler-rt/lib/asan/asan_suppressions.cpp

@@ -81,21 +81,20 @@ bool IsStackTraceSuppressed(const StackTrace *stack) {
     }
 
     if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) {
-      SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
+      SymbolizedStackHolder symbolized_stack(symbolizer->SymbolizePC(addr));
+      const SymbolizedStack *frames = symbolized_stack.get();
       CHECK(frames);
-      for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
+      for (const SymbolizedStack *cur = frames; cur; cur = cur->next) {
         const char *function_name = cur->info.function;
         if (!function_name) {
           continue;
         }
         // Match "interceptor_via_fun" suppressions.
         if (suppression_ctx->Match(function_name, kInterceptorViaFunction,
                                    &s)) {
-          frames->ClearAll();
           return true;
         }
       }
-      frames->ClearAll();
     }
   }
   return false;

compiler-rt/lib/hwasan/hwasan_report.cpp

@@ -292,12 +292,14 @@ static void PrintStackAllocations(const StackAllocationsRingBuffer *sa,
     uptr pc = record & pc_mask;
     frame_desc.AppendF("  record_addr:0x%zx record:0x%zx",
                        reinterpret_cast<uptr>(record_addr), record);
-    if (SymbolizedStack *frame = Symbolizer::GetOrInit()->SymbolizePC(pc)) {
+    SymbolizedStackHolder symbolized_stack(
+        Symbolizer::GetOrInit()->SymbolizePC(pc));
+    const SymbolizedStack *frame = symbolized_stack.get();
+    if (frame) {
       StackTracePrinter::GetOrInit()->RenderFrame(
           &frame_desc, " %F %L", 0, frame->info.address, &frame->info,
           common_flags()->symbolize_vs_style,
           common_flags()->strip_path_prefix);
-      frame->ClearAll();
     }
     Printf("%s\n", frame_desc.data());
     frame_desc.clear();

compiler-rt/lib/lsan/lsan_common.cpp

@@ -155,14 +155,15 @@ Suppression *LeakSuppressionContext::GetSuppressionForAddr(uptr addr) {
     return s;
 
   // Suppress by file or function name.
-  SymbolizedStack *frames = Symbolizer::GetOrInit()->SymbolizePC(addr);
-  for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
+  SymbolizedStackHolder symbolized_stack(
+      Symbolizer::GetOrInit()->SymbolizePC(addr));
+  const SymbolizedStack *frames = symbolized_stack.get();
+  for (const SymbolizedStack *cur = frames; cur; cur = cur->next) {
     if (context.Match(cur->info.function, kSuppressionLeak, &s) ||
         context.Match(cur->info.file, kSuppressionLeak, &s)) {
       break;
     }
   }
-  frames->ClearAll();
   return s;
 }
 

compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp

@@ -33,13 +33,14 @@ class StackTraceTextPrinter {
             stack_trace_fmt)) {}
 
   bool ProcessAddressFrames(uptr pc) {
-    SymbolizedStack *frames = symbolize_
-                                  ? Symbolizer::GetOrInit()->SymbolizePC(pc)
-                                  : SymbolizedStack::New(pc);
+    SymbolizedStackHolder symbolized_stack(
+        symbolize_ ? Symbolizer::GetOrInit()->SymbolizePC(pc)
+                   : SymbolizedStack::New(pc));
+    const SymbolizedStack *frames = symbolized_stack.get();
     if (!frames)
       return false;
 
-    for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
+    for (const SymbolizedStack *cur = frames; cur; cur = cur->next) {
       uptr prev_len = output_->length();
       StackTracePrinter::GetOrInit()->RenderFrame(
           output_, stack_trace_fmt_, frame_num_++, cur->info.address,
@@ -51,13 +52,12 @@ class StackTraceTextPrinter {
 
       ExtendDedupToken(cur);
     }
-    frames->ClearAll();
     return true;
   }
 
  private:
   // Extend the dedup token by appending a new frame.
-  void ExtendDedupToken(SymbolizedStack *stack) {
+  void ExtendDedupToken(const SymbolizedStack *stack) {
     if (!dedup_token_)
       return;
 

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer.h

@@ -64,6 +64,26 @@ struct SymbolizedStack {
   SymbolizedStack();
 };
 
+class SymbolizedStackHolder {
+  SymbolizedStack *Stack;
+
+  void clear() {
+    if (Stack)
+      Stack->ClearAll();
+  }
+
+ public:
+  explicit SymbolizedStackHolder(SymbolizedStack *Stack = nullptr)
+      : Stack(Stack) {}
+  ~SymbolizedStackHolder() { clear(); }
+  void reset(SymbolizedStack *S = nullptr) {
+    if (Stack != S)
+      clear();
+    Stack = S;
+  }
+  const SymbolizedStack *get() const { return Stack; }
+};
+
 // For now, DataInfo is used to describe global variable.
 struct DataInfo {
   // Owns all the string members. Storage for them is

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp

@@ -102,9 +102,10 @@ void ReportErrorSummary(const char *error_type, const StackTrace *stack,
   // 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]);
-  SymbolizedStack *frame = Symbolizer::GetOrInit()->SymbolizePC(pc);
+  SymbolizedStackHolder symbolized_stack(
+      Symbolizer::GetOrInit()->SymbolizePC(pc));
+  const SymbolizedStack *frame = symbolized_stack.get();
   ReportErrorSummary(error_type, frame->info, alt_tool_name);
-  frame->ClearAll();
 #endif
 }
 

compiler-rt/lib/ubsan/ubsan_diag.h

@@ -18,26 +18,6 @@
 
 namespace __ubsan {
 
-class SymbolizedStackHolder {
-  SymbolizedStack *Stack;
-
-  void clear() {
-    if (Stack)
-      Stack->ClearAll();
-  }
-
-public:
-  explicit SymbolizedStackHolder(SymbolizedStack *Stack = nullptr)
-      : Stack(Stack) {}
-  ~SymbolizedStackHolder() { clear(); }
-  void reset(SymbolizedStack *S) {
-    if (Stack != S)
-      clear();
-    Stack = S;
-  }
-  const SymbolizedStack *get() const { return Stack; }
-};
-
 SymbolizedStack *getSymbolizedLocation(uptr PC);
 
 inline SymbolizedStack *getCallerLocation(uptr CallerPC) {