[sanitizer] Move DescribeSignalOrException to sanitizer_common.

Differential Revision: https://reviews.llvm.org/D29459

llvm-svn: 293956

3 files changed, 41 insertions, 0 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common.h b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
index 2dabb5066ec..37f26dacf5e 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common.h
@@ -382,6 +382,7 @@ void SetSoftRssLimitExceededCallback(void (*Callback)(bool exceeded));
 typedef void (*SignalHandlerType)(int, void *, void *);
 bool IsHandledDeadlySignal(int signum);
 void InstallDeadlySignalHandlers(SignalHandlerType handler);
+const char *DescribeSignalOrException(int signo);
 // Alternative signal stack (POSIX-only).
 void SetAlternateSignalStack();
 void UnsetAlternateSignalStack();
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix.cc b/compiler-rt/lib/sanitizer_common/sanitizer_posix.cc
index c70d5a40cb4..b9cfb06bbfd 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_posix.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix.cc
@@ -358,6 +358,20 @@ SignalContext SignalContext::Create(void *siginfo, void *context) {
   return SignalContext(context, addr, pc, sp, bp, is_memory_access, write_flag);
 }
 
+const char *DescribeSignalOrException(int signo) {
+  switch (signo) {
+    case SIGFPE:
+      return "FPE";
+    case SIGILL:
+      return "ILL";
+    case SIGABRT:
+      return "ABRT";
+    default:
+      return "SEGV";
+  }
+  return "UNKNOWN SIGNAL";
+}
+
 } // namespace __sanitizer
 
 #endif // SANITIZER_POSIX
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_win.cc b/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
index 247ad8a0875..66504d90957 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
@@ -863,6 +863,32 @@ bool IsHandledDeadlyException(DWORD exceptionCode) {
   return false;
 }
 
+const char *DescribeSignalOrException(int signo) {
+  unsigned code = signo;
+  // Get the string description of the exception if this is a known deadly
+  // exception.
+  switch (code) {
+    case EXCEPTION_ACCESS_VIOLATION: return "access-violation";
+    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: return "array-bounds-exceeded";
+    case EXCEPTION_STACK_OVERFLOW: return "stack-overflow";
+    case EXCEPTION_DATATYPE_MISALIGNMENT: return "datatype-misalignment";
+    case EXCEPTION_IN_PAGE_ERROR: return "in-page-error";
+    case EXCEPTION_ILLEGAL_INSTRUCTION: return "illegal-instruction";
+    case EXCEPTION_PRIV_INSTRUCTION: return "priv-instruction";
+    case EXCEPTION_BREAKPOINT: return "breakpoint";
+    case EXCEPTION_FLT_DENORMAL_OPERAND: return "flt-denormal-operand";
+    case EXCEPTION_FLT_DIVIDE_BY_ZERO: return "flt-divide-by-zero";
+    case EXCEPTION_FLT_INEXACT_RESULT: return "flt-inexact-result";
+    case EXCEPTION_FLT_INVALID_OPERATION: return "flt-invalid-operation";
+    case EXCEPTION_FLT_OVERFLOW: return "flt-overflow";
+    case EXCEPTION_FLT_STACK_CHECK: return "flt-stack-check";
+    case EXCEPTION_FLT_UNDERFLOW: return "flt-underflow";
+    case EXCEPTION_INT_DIVIDE_BY_ZERO: return "int-divide-by-zero";
+    case EXCEPTION_INT_OVERFLOW: return "int-overflow";
+  }
+  return "unknown exception";
+}
+
 bool IsAccessibleMemoryRange(uptr beg, uptr size) {
   SYSTEM_INFO si;
   GetNativeSystemInfo(&si);