137 lines
5.2 KiB
Objective-C
137 lines
5.2 KiB
Objective-C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Undo the damage that exception_defines.h does.
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#undef try
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#undef catch
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#ifndef nsObjCExceptions_h_
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#define nsObjCExceptions_h_
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#import <Foundation/Foundation.h>
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#include <unistd.h>
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#include <signal.h>
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#include "nsError.h"
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// Undo the damage that exception_defines.h does.
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#undef try
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#undef catch
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/* NOTE: Macros that claim to abort no longer abort, see bug 486574.
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* If you actually want to log and abort, call "nsObjCExceptionLogAbort"
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* from an exception handler. At some point we will fix this by replacing
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* all macros in the tree with appropriately-named macros.
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*/
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// See Mozilla bug 163260.
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// This file can only be included in an Objective-C context.
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__attribute__((unused))
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static void
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nsObjCExceptionLog(NSException* aException)
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{
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NSLog(@"Mozilla has caught an Obj-C exception [%@: %@]",
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[aException name], [aException reason]);
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}
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__attribute__((unused))
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static void
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nsObjCExceptionAbort()
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{
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// We need to raise a mach-o signal here, the Mozilla crash reporter on
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// Mac OS X does not respond to POSIX signals. Raising mach-o signals directly
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// is tricky so we do it by just derefing a null pointer.
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int* foo = nullptr;
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*foo = 1;
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}
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__attribute__((unused))
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static void
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nsObjCExceptionLogAbort(NSException* aException)
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{
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nsObjCExceptionLog(aException);
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nsObjCExceptionAbort();
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}
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#define NS_OBJC_TRY(_e, _fail) \
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@try { _e; } \
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@catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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_fail; \
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}
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#define NS_OBJC_TRY_EXPR(_e, _fail) \
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({ \
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typeof(_e) _tmp; \
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@try { _tmp = (_e); } \
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@catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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_fail; \
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} \
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_tmp; \
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})
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#define NS_OBJC_TRY_EXPR_NULL(_e) \
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NS_OBJC_TRY_EXPR(_e, 0)
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#define NS_OBJC_TRY_IGNORE(_e) \
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NS_OBJC_TRY(_e, )
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// To reduce code size the abort versions do not reuse above macros. This allows
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// catch blocks to only contain one call.
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#define NS_OBJC_TRY_ABORT(_e) \
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@try { _e; } \
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@catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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}
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#define NS_OBJC_TRY_EXPR_ABORT(_e) \
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({ \
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typeof(_e) _tmp; \
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@try { _tmp = (_e); } \
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@catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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} \
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_tmp; \
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})
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// For wrapping blocks of Obj-C calls. Does not actually terminate.
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#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK @try {
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#define NS_OBJC_END_TRY_ABORT_BLOCK } @catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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}
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// Same as above ABORT_BLOCK but returns a value after the try/catch block to
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// suppress compiler warnings. This allows us to avoid having to refactor code
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// to get scoping right when wrapping an entire method.
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#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL @try {
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#define NS_OBJC_END_TRY_ABORT_BLOCK_NIL } @catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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} \
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return nil;
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#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSNULL @try {
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#define NS_OBJC_END_TRY_ABORT_BLOCK_NSNULL } @catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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} \
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return nullptr;
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#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT @try {
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#define NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT } @catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn); \
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} \
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return NS_ERROR_FAILURE;
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#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN @try {
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#define NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(_rv) } @catch(NSException *_exn) { \
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nsObjCExceptionLog(_exn);\
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} \
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return _rv;
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#endif // nsObjCExceptions_h_
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