[sanitizer] Move exception code to sanitizer_common.

Differential Revision: https://reviews.llvm.org/D29458

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@293955 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 57 insertions, 29 deletions

diff --git a/lib/asan/asan_win.cc b/lib/asan/asan_win.cc
index a41620ed3..d77d9d643 100644
--- a/lib/asan/asan_win.cc
+++ b/lib/asan/asan_win.cc
@@ -27,6 +27,7 @@
 #include "asan_mapping.h"
 #include "sanitizer_common/sanitizer_libc.h"
 #include "sanitizer_common/sanitizer_mutex.h"
+#include "sanitizer_common/sanitizer_win.h"
 #include "sanitizer_common/sanitizer_win_defs.h"
 
 using namespace __asan;  // NOLINT
@@ -236,33 +237,6 @@ void InitializePlatformExceptionHandlers() {
 
 static LPTOP_LEVEL_EXCEPTION_FILTER default_seh_handler;
 
-// Check based on flags if we should report this exception.
-static bool ShouldReportDeadlyException(unsigned code) {
-  switch (code) {
-    case EXCEPTION_ACCESS_VIOLATION:
-    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
-    case EXCEPTION_STACK_OVERFLOW:
-    case EXCEPTION_DATATYPE_MISALIGNMENT:
-    case EXCEPTION_IN_PAGE_ERROR:
-      return common_flags()->handle_segv;
-    case EXCEPTION_ILLEGAL_INSTRUCTION:
-    case EXCEPTION_PRIV_INSTRUCTION:
-    case EXCEPTION_BREAKPOINT:
-      return common_flags()->handle_sigill;
-    case EXCEPTION_FLT_DENORMAL_OPERAND:
-    case EXCEPTION_FLT_DIVIDE_BY_ZERO:
-    case EXCEPTION_FLT_INEXACT_RESULT:
-    case EXCEPTION_FLT_INVALID_OPERATION:
-    case EXCEPTION_FLT_OVERFLOW:
-    case EXCEPTION_FLT_STACK_CHECK:
-    case EXCEPTION_FLT_UNDERFLOW:
-    case EXCEPTION_INT_DIVIDE_BY_ZERO:
-    case EXCEPTION_INT_OVERFLOW:
-      return common_flags()->handle_sigfpe;
-  }
-  return false;
-}
-
 // Return the textual name for this exception.
 const char *DescribeSignalOrException(int signo) {
   unsigned code = signo;
@@ -296,7 +270,7 @@ long __asan_unhandled_exception_filter(EXCEPTION_POINTERS *info) {
   CONTEXT *context = info->ContextRecord;
 
   // Continue the search if the signal wasn't deadly.
-  if (!ShouldReportDeadlyException(exception_record->ExceptionCode))
+  if (!IsHandledDeadlyException(exception_record->ExceptionCode))
     return EXCEPTION_CONTINUE_SEARCH;
   // FIXME: Handle EXCEPTION_STACK_OVERFLOW here.
 
diff --git a/lib/sanitizer_common/CMakeLists.txt b/lib/sanitizer_common/CMakeLists.txt
index 1f4b77458..fe0632866 100644
--- a/lib/sanitizer_common/CMakeLists.txt
+++ b/lib/sanitizer_common/CMakeLists.txt
@@ -126,7 +126,8 @@ set(SANITIZER_HEADERS
   sanitizer_syscall_generic.inc
   sanitizer_syscall_linux_x86_64.inc
   sanitizer_syscall_linux_aarch64.inc
-  sanitizer_thread_registry.h)
+  sanitizer_thread_registry.h
+  sanitizer_win.h)
 
 include_directories(..)
 
diff --git a/lib/sanitizer_common/sanitizer_win.cc b/lib/sanitizer_common/sanitizer_win.cc
index 884b166ce..247ad8a08 100644
--- a/lib/sanitizer_common/sanitizer_win.cc
+++ b/lib/sanitizer_common/sanitizer_win.cc
@@ -836,6 +836,33 @@ bool IsHandledDeadlySignal(int signum) {
   return false;
 }
 
+// Check based on flags if we should handle this exception.
+bool IsHandledDeadlyException(DWORD exceptionCode) {
+  switch (exceptionCode) {
+    case EXCEPTION_ACCESS_VIOLATION:
+    case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
+    case EXCEPTION_STACK_OVERFLOW:
+    case EXCEPTION_DATATYPE_MISALIGNMENT:
+    case EXCEPTION_IN_PAGE_ERROR:
+      return common_flags()->handle_segv;
+    case EXCEPTION_ILLEGAL_INSTRUCTION:
+    case EXCEPTION_PRIV_INSTRUCTION:
+    case EXCEPTION_BREAKPOINT:
+      return common_flags()->handle_sigill;
+    case EXCEPTION_FLT_DENORMAL_OPERAND:
+    case EXCEPTION_FLT_DIVIDE_BY_ZERO:
+    case EXCEPTION_FLT_INEXACT_RESULT:
+    case EXCEPTION_FLT_INVALID_OPERATION:
+    case EXCEPTION_FLT_OVERFLOW:
+    case EXCEPTION_FLT_STACK_CHECK:
+    case EXCEPTION_FLT_UNDERFLOW:
+    case EXCEPTION_INT_DIVIDE_BY_ZERO:
+    case EXCEPTION_INT_OVERFLOW:
+      return common_flags()->handle_sigfpe;
+  }
+  return false;
+}
+
 bool IsAccessibleMemoryRange(uptr beg, uptr size) {
   SYSTEM_INFO si;
   GetNativeSystemInfo(&si);
diff --git a/lib/sanitizer_common/sanitizer_win.h b/lib/sanitizer_common/sanitizer_win.h
new file mode 100644
index 000000000..23e01ab75
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_win.h
@@ -0,0 +1,26 @@
+//===-- sanitizer_win.h -----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Windows-specific declarations.
+//
+//===----------------------------------------------------------------------===//
+#ifndef SANITIZER_WIN_H
+#define SANITIZER_WIN_H
+
+#include "sanitizer_platform.h"
+#if SANITIZER_WINDOWS
+#include "sanitizer_internal_defs.h"
+
+namespace __sanitizer {
+// Check based on flags if we should handle the exception.
+bool IsHandledDeadlyException(DWORD exceptionCode);
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_WINDOWS
+#endif  // SANITIZER_WIN_H