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| author | slightlyoff@chromium.org <slightlyoff@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-09-24 05:11:58 +0000 |
|---|---|---|
| committer | slightlyoff@chromium.org <slightlyoff@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2009-09-24 05:11:58 +0000 |
| commit | f781782dd67077478e117c61dca4ea5eefce3544 (patch) | |
| tree | 4801f724123cfdcbb69c4e7fe40a565b331723ae /chrome_frame/vectored_handler-impl.h | |
| parent | 63cf4759efa2373e33436fb5df6849f930081226 (diff) | |
| download | chromium_src-f781782dd67077478e117c61dca4ea5eefce3544.zip chromium_src-f781782dd67077478e117c61dca4ea5eefce3544.tar.gz chromium_src-f781782dd67077478e117c61dca4ea5eefce3544.tar.bz2 | |
Initial import of the Chrome Frame codebase. Integration in chrome.gyp coming in a separate CL.
BUG=None
TEST=None
Review URL: http://codereview.chromium.org/218019
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27042 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'chrome_frame/vectored_handler-impl.h')
| -rw-r--r-- | chrome_frame/vectored_handler-impl.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/chrome_frame/vectored_handler-impl.h b/chrome_frame/vectored_handler-impl.h new file mode 100644 index 0000000..f850641 --- /dev/null +++ b/chrome_frame/vectored_handler-impl.h @@ -0,0 +1,106 @@ +// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_FRAME_VECTORED_HANDLER_IMPL_H_
+#define CHROME_FRAME_VECTORED_HANDLER_IMPL_H_
+#include "chrome_frame/vectored_handler.h"
+
+#if defined(_M_IX86)
+typedef struct _EXCEPTION_REGISTRATION_RECORD {
+ struct _EXCEPTION_REGISTRATION_RECORD* Next;
+ PVOID Handler;
+} EXCEPTION_REGISTRATION_RECORD;
+#define EXCEPTION_CHAIN_END ((struct _EXCEPTION_REGISTRATION_RECORD*)-1)
+#else
+#error only x86 is supported for now.
+#endif
+
+
+// VEH handler flags settings.
+// These are grabbed from winnt.h for PocketPC.
+// Only EXCEPTION_NONCONTINUABLE in defined in "regular" winnt.h
+// #define EXCEPTION_NONCONTINUABLE 0x1 // Noncontinuable exception
+#define EXCEPTION_UNWINDING 0x2 // Unwind is in progress
+#define EXCEPTION_EXIT_UNWIND 0x4 // Exit unwind is in progress
+#define EXCEPTION_STACK_INVALID 0x8 // Stack out of limits or unaligned
+#define EXCEPTION_NESTED_CALL 0x10 // Nested exception handler call
+#define EXCEPTION_TARGET_UNWIND 0x20 // Target unwind in progress
+#define EXCEPTION_COLLIDED_UNWIND 0x40 // Collided exception handler call
+
+#define EXCEPTION_UNWIND (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND | \
+ EXCEPTION_TARGET_UNWIND | EXCEPTION_COLLIDED_UNWIND)
+
+#define IS_UNWINDING(Flag) (((Flag) & EXCEPTION_UNWIND) != 0)
+#define IS_DISPATCHING(Flag) (((Flag) & EXCEPTION_UNWIND) == 0)
+#define IS_TARGET_UNWIND(Flag) ((Flag) & EXCEPTION_TARGET_UNWIND)
+// End of grabbed section
+
+template <class E>
+LONG WINAPI VectoredHandlerT<E>::VectoredHandler(
+ EXCEPTION_POINTERS* exceptionInfo) {
+ // TODO(stoyan): Consider reentrancy
+ const DWORD exceptionCode = exceptionInfo->ExceptionRecord->ExceptionCode;
+
+ // Not interested in non-error exceptions. In this category falls exceptions
+ // like:
+ // 0x40010006 - OutputDebugStringA. Seen when no debugger is attached
+ // (otherwise debugger swallows the exception and prints
+ // the string).
+ // 0x406D1388 - DebuggerProbe. Used by debug CRT - for example see source
+ // code of isatty(). Used to name a thread as well.
+ // RPC_E_DISCONNECTED and Co. - COM IPC non-fatal warnings
+ // STATUS_BREAKPOINT and Co. - Debugger related breakpoints
+
+ if ((exceptionCode & ERROR_SEVERITY_ERROR) != ERROR_SEVERITY_ERROR) {
+ return ExceptionContinueSearch;
+ }
+
+ ++VectoredHandlerT<E>::g_exceptions_seen;
+
+ // TODO(stoyan): Check whether exception address is inbetween
+ // [IsBadReadPtr, IsBadReadPtr + 0xXX]
+
+ const DWORD exceptionFlags = exceptionInfo->ExceptionRecord->ExceptionFlags;
+ // I don't think VEH is called on unwind. Just to be safe.
+ if (IS_DISPATCHING(exceptionFlags)) {
+ if (ModuleHasInstalledSEHFilter())
+ return ExceptionContinueSearch;
+
+ if (E::IsOurModule(exceptionInfo->ExceptionRecord->ExceptionAddress)) {
+ E::WriteDump(exceptionInfo);
+ return ExceptionContinueSearch;
+ }
+
+ // See whether our module is somewhere in the call stack.
+ void* back_trace[max_back_trace] = {0};
+ // Skip RtlCaptureStackBackTrace and VectoredHandler itself.
+ DWORD captured = E::RtlCaptureStackBackTrace(2, max_back_trace - 2,
+ &back_trace[0], NULL);
+ for (DWORD i = 0; i < captured; ++i) {
+ if (E::IsOurModule(back_trace[i])) {
+ E::WriteDump(exceptionInfo);
+ return ExceptionContinueSearch;
+ }
+ }
+ }
+
+ return ExceptionContinueSearch;
+}
+
+template <class E>
+BOOL VectoredHandlerT<E>::ModuleHasInstalledSEHFilter() {
+ EXCEPTION_REGISTRATION_RECORD* RegistrationFrame = E::RtlpGetExceptionList();
+ // TODO(stoyan): Add the stack limits check and some sanity checks like
+ // decreasing addresses of registration records
+ while (RegistrationFrame != EXCEPTION_CHAIN_END) {
+ if (E::IsOurModule(RegistrationFrame->Handler)) {
+ return TRUE;
+ }
+
+ RegistrationFrame = RegistrationFrame->Next;
+ }
+
+ return FALSE;
+}
+#endif // CHROME_FRAME_VECTORED_HANDLER_IMPL_H_
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