[sanitizer] Move DescribeSignalOrException to sanitizer_common.

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

llvm-svn: 293956

compiler-rt/lib/asan/asan_errors.cc

@@ -61,7 +61,7 @@ static void MaybeDumpRegisters(void *context) {
 void ErrorDeadlySignal::Print() {
   Decorator d;
   Printf("%s", d.Warning());
-  const char *description = DescribeSignalOrException(signo);
+  const char *description = __sanitizer::DescribeSignalOrException(signo);
   Report(
       "ERROR: AddressSanitizer: %s on unknown address %p (pc %p bp %p sp %p "
       "T%d)\n",

compiler-rt/lib/asan/asan_internal.h

@@ -65,9 +65,6 @@ void AsanInitFromRtl();
 // asan_win.cc
 void InitializePlatformExceptionHandlers();
 
-// asan_win.cc / asan_posix.cc
-const char *DescribeSignalOrException(int signo);
-
 // asan_rtl.cc
 void NORETURN ShowStatsAndAbort();
 

compiler-rt/lib/asan/asan_posix.cc

@@ -33,19 +33,6 @@
 
 namespace __asan {
 
-const char *DescribeSignalOrException(int signo) {
-  switch (signo) {
-    case SIGFPE:
-      return "FPE";
-    case SIGILL:
-      return "ILL";
-    case SIGABRT:
-      return "ABRT";
-    default:
-      return "SEGV";
-  }
-}
-
 void AsanOnDeadlySignal(int signo, void *siginfo, void *context) {
   ScopedDeadlySignal signal_scope(GetCurrentThread());
   int code = (int)((siginfo_t*)siginfo)->si_code;

compiler-rt/lib/asan/asan_win.cc

@@ -237,33 +237,6 @@ void InitializePlatformExceptionHandlers() {
 
 static LPTOP_LEVEL_EXCEPTION_FILTER default_seh_handler;
 
-// Return the textual name for this exception.
-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 nullptr;
-}
-
 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
 long __asan_unhandled_exception_filter(EXCEPTION_POINTERS *info) {
   EXCEPTION_RECORD *exception_record = info->ExceptionRecord;

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();

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

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);