/usr/include/thunderbird/nsObjCExceptions.h is in thunderbird-dev 1:38.6.0+build1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Undo the damage that exception_defines.h does.
#undef try
#undef catch
#ifndef nsObjCExceptions_h_
#define nsObjCExceptions_h_
#import <Foundation/Foundation.h>
#ifdef DEBUG
#import <ExceptionHandling/NSExceptionHandler.h>
#endif
#if defined(MOZ_CRASHREPORTER) && defined(__cplusplus)
#include "nsICrashReporter.h"
#include "nsCOMPtr.h"
#include "nsServiceManagerUtils.h"
#endif
#include <unistd.h>
#include <signal.h>
#include "nsError.h"
// Undo the damage that exception_defines.h does.
#undef try
#undef catch
/* NOTE: Macros that claim to abort no longer abort, see bug 486574.
* If you actually want to log and abort, call "nsObjCExceptionLogAbort"
* from an exception handler. At some point we will fix this by replacing
* all macros in the tree with appropriately-named macros.
*/
// See Mozilla bug 163260.
// This file can only be included in an Objective-C context.
__attribute__((unused))
static void
nsObjCExceptionLog(NSException* aException)
{
NSLog(@"Mozilla has caught an Obj-C exception [%@: %@]",
[aException name], [aException reason]);
#if defined(MOZ_CRASHREPORTER) && defined(__cplusplus)
// Attach exception info to the crash report.
nsCOMPtr<nsICrashReporter> crashReporter =
do_GetService("@mozilla.org/toolkit/crash-reporter;1");
if (crashReporter) {
crashReporter->AppendObjCExceptionInfoToAppNotes(static_cast<void*>(aException));
}
#endif
#ifdef DEBUG
@try {
// Try to get stack information out of the exception. 10.5 returns the stack
// info with the callStackReturnAddresses selector.
NSArray* stackTrace = nil;
if ([aException respondsToSelector:@selector(callStackReturnAddresses)]) {
NSArray* addresses = (NSArray*)
[aException performSelector:@selector(callStackReturnAddresses)];
if ([addresses count]) {
stackTrace = addresses;
}
}
// 10.4 doesn't respond to callStackReturnAddresses so we'll try to pull the
// stack info out of the userInfo. It might not be there, sadly :(
if (!stackTrace) {
stackTrace = [[aException userInfo] objectForKey:NSStackTraceKey];
}
if (stackTrace) {
// The command line should look like this:
// /usr/bin/atos -p <pid> -printHeader <stack frame addresses>
NSMutableArray* args =
[NSMutableArray arrayWithCapacity:[stackTrace count] + 3];
[args addObject:@"-p"];
int pid = [[NSProcessInfo processInfo] processIdentifier];
[args addObject:[NSString stringWithFormat:@"%d", pid]];
[args addObject:@"-printHeader"];
unsigned int stackCount = [stackTrace count];
unsigned int stackIndex = 0;
for (; stackIndex < stackCount; stackIndex++) {
unsigned long address =
[[stackTrace objectAtIndex:stackIndex] unsignedLongValue];
[args addObject:[NSString stringWithFormat:@"0x%lx", address]];
}
NSPipe* outPipe = [NSPipe pipe];
NSTask* task = [[NSTask alloc] init];
[task setLaunchPath:@"/usr/bin/atos"];
[task setArguments:args];
[task setStandardOutput:outPipe];
[task setStandardError:outPipe];
NSLog(@"Generating stack trace for Obj-C exception...");
// This will throw an exception if the atos tool cannot be found, and in
// that case we'll just hit our @catch block below.
[task launch];
[task waitUntilExit];
[task release];
NSData* outData =
[[outPipe fileHandleForReading] readDataToEndOfFile];
NSString* outString =
[[NSString alloc] initWithData:outData encoding:NSUTF8StringEncoding];
NSLog(@"Stack trace:\n%@", outString);
[outString release];
} else {
NSLog(@"<No stack information available for Obj-C exception>");
}
}
@catch (NSException* exn) {
NSLog(@"Failed to generate stack trace for Obj-C exception [%@: %@]",
[exn name], [exn reason]);
}
#endif
}
__attribute__((unused))
static void
nsObjCExceptionAbort()
{
// We need to raise a mach-o signal here, the Mozilla crash reporter on
// Mac OS X does not respond to POSIX signals. Raising mach-o signals directly
// is tricky so we do it by just derefing a null pointer.
int* foo = nullptr;
*foo = 1;
}
__attribute__((unused))
static void
nsObjCExceptionLogAbort(NSException* aException)
{
nsObjCExceptionLog(aException);
nsObjCExceptionAbort();
}
#define NS_OBJC_TRY(_e, _fail) \
@try { _e; } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
_fail; \
}
#define NS_OBJC_TRY_EXPR(_e, _fail) \
({ \
typeof(_e) _tmp; \
@try { _tmp = (_e); } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
_fail; \
} \
_tmp; \
})
#define NS_OBJC_TRY_EXPR_NULL(_e) \
NS_OBJC_TRY_EXPR(_e, 0)
#define NS_OBJC_TRY_IGNORE(_e) \
NS_OBJC_TRY(_e, )
// To reduce code size the abort versions do not reuse above macros. This allows
// catch blocks to only contain one call.
#define NS_OBJC_TRY_ABORT(_e) \
@try { _e; } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
}
#define NS_OBJC_TRY_EXPR_ABORT(_e) \
({ \
typeof(_e) _tmp; \
@try { _tmp = (_e); } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
} \
_tmp; \
})
// For wrapping blocks of Obj-C calls. Does not actually terminate.
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
}
// Same as above ABORT_BLOCK but returns a value after the try/catch block to
// suppress compiler warnings. This allows us to avoid having to refactor code
// to get scoping right when wrapping an entire method.
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NIL } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
} \
return nil;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSNULL @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NSNULL } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
} \
return nullptr;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
} \
return NS_ERROR_FAILURE;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(_rv) } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn);\
} \
return _rv;
#define NS_OBJC_BEGIN_TRY_LOGONLY_BLOCK @try {
#define NS_OBJC_END_TRY_LOGONLY_BLOCK } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
}
#define NS_OBJC_BEGIN_TRY_LOGONLY_BLOCK_RETURN @try {
#define NS_OBJC_END_TRY_LOGONLY_BLOCK_RETURN(_rv) } @catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
} \
return _rv;
#endif // nsObjCExceptions_h_
|