[compiler-rt] r196302 - [sanitizer] Expose __sanitizer_print_stack_trace().

[Sergey Matveev]

Author: smatveev
Date: Tue Dec  3 12:24:28 2013
New Revision: 196302

URL: http://llvm.org/viewvc/llvm-project?rev=196302&view=rev
Log:
[sanitizer] Expose __sanitizer_print_stack_trace().

Expose a new interface function for debugging code built with sanitizer tools.
Add an ASan implementation.

Added:
    compiler-rt/trunk/lib/asan/lit_tests/TestCases/print-stack-trace.cc
Modified:
    compiler-rt/trunk/include/sanitizer/common_interface_defs.h
    compiler-rt/trunk/lib/asan/asan_stack.cc
    compiler-rt/trunk/lib/asan/asan_stack.h

Modified: compiler-rt/trunk/include/sanitizer/common_interface_defs.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/include/sanitizer/common_interface_defs.h?rev=196302&r1=196301&r2=196302&view=diff
==============================================================================
--- compiler-rt/trunk/include/sanitizer/common_interface_defs.h (original)
+++ compiler-rt/trunk/include/sanitizer/common_interface_defs.h Tue Dec  3 12:24:28 2013
@@ -85,6 +85,9 @@ extern "C" {
                                                  const void *old_mid,
                                                  const void *new_mid);
 
+  // Print the stack trace leading to this call. Useful for debugging user code.
+  void __sanitizer_print_stack_trace();
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif

Modified: compiler-rt/trunk/lib/asan/asan_stack.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/asan_stack.cc?rev=196302&r1=196301&r2=196302&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/asan_stack.cc (original)
+++ compiler-rt/trunk/lib/asan/asan_stack.cc Tue Dec  3 12:24:28 2013
@@ -45,3 +45,9 @@ bool __asan_symbolize(const void *pc, ch
   return false;
 }
 #endif
+
+SANITIZER_INTERFACE_ATTRIBUTE
+extern "C" void __sanitizer_print_stack_trace() {
+  using namespace __asan;
+  PRINT_CURRENT_STACK();
+}

Modified: compiler-rt/trunk/lib/asan/asan_stack.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/asan_stack.h?rev=196302&r1=196301&r2=196302&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/asan_stack.h (original)
+++ compiler-rt/trunk/lib/asan/asan_stack.h Tue Dec  3 12:24:28 2013
@@ -77,11 +77,10 @@ void PrintStack(const uptr *trace, uptr
 
 #define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC
 
-#define PRINT_CURRENT_STACK()                    \
-  {                                              \
-    GET_STACK_TRACE(kStackTraceMax,              \
-      common_flags()->fast_unwind_on_fatal);     \
-    PrintStack(&stack);                          \
+#define PRINT_CURRENT_STACK()   \
+  {                             \
+    GET_STACK_TRACE_FATAL_HERE; \
+    PrintStack(&stack);         \
   }
 
 #endif  // ASAN_STACK_H

Added: compiler-rt/trunk/lib/asan/lit_tests/TestCases/print-stack-trace.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/lit_tests/TestCases/print-stack-trace.cc?rev=196302&view=auto
==============================================================================
--- compiler-rt/trunk/lib/asan/lit_tests/TestCases/print-stack-trace.cc (added)
+++ compiler-rt/trunk/lib/asan/lit_tests/TestCases/print-stack-trace.cc Tue Dec  3 12:24:28 2013
@@ -0,0 +1,16 @@
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
+
+#include <sanitizer/asan_interface.h>
+
+void FooBarBaz() {
+  __sanitizer_print_stack_trace();
+}
+
+int main() {
+  FooBarBaz();
+  return 0;
+}
+// CHECK: {{    #0 0x.* in __sanitizer_print_stack_trace}}
+// CHECK: {{    #1 0x.* in FooBarBaz\(\) .*print-stack-trace.cc:7}}
+// CHECK: {{    #2 0x.* in main .*print-stack-trace.cc:11}}