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gecko-dev/xpcom/base/nsDebug.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* This Original Code has been modified by IBM Corporation. Modifications made by IBM
* described herein are Copyright (c) International Business Machines Corporation, 2000.
* Modifications to Mozilla code or documentation identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/10/2000 IBM Corp. Added DebugBreak() definitions for OS/2
* 06/19/2000 IBM Corp. Fix DebugBreak() messagebox defaults for OS/2
* 06/19/2000 Henry Sobotka Fix DebugBreak() for OS/2 on retail build.
*/
#include "nsDebug.h"
#include "prprf.h"
#include "prlog.h"
#include "prinit.h"
#include "plstr.h"
#include "nsError.h"
#include "prerror.h"
#include "prerr.h"
#if defined(XP_BEOS)
/* For DEBUGGER macros */
#include <Debug.h>
#endif
#if defined(XP_UNIX) || defined(_WIN32) || defined(XP_OS2) || defined(XP_BEOS)
/* for abort() and getenv() */
#include <stdlib.h>
#endif
#if defined(XP_UNIX) && !defined(UNIX_CRASH_ON_ASSERT)
#include <signal.h>
/* for nsTraceRefcnt::WalkTheStack() */
#include "nsISupportsUtils.h"
#include "nsTraceRefcnt.h"
#if defined(linux) && defined(__i386)
# define DebugBreak() { asm("int $3"); }
#else
# define DebugBreak()
#endif
#endif
#if defined(XP_OS2)
/* Added definitions for DebugBreak() for 2 different OS/2 compilers. Doing
* the int3 on purpose for Visual Age so that a developer can step over the
* instruction if so desired. Not always possible if trapping due to exception
* handling IBM-AKR
*/
#define INCL_WINDIALOGS // need for WinMessageBox
#include <os2.h>
#if defined(DEBUG)
#if defined(XP_OS2_VACPP)
#include <builtin.h>
#define DebugBreak() { _interrupt(3); }
#elif defined(XP_OS2_EMX)
/* Force a trap */
#define DebugBreak() { int *pTrap=NULL; *pTrap = 1; }
#else
#define DebugBreak()
#endif
#else
#define DebugBreak()
#endif /* DEBUG */
#endif /* XP_OS2 */
#if defined(_WIN32)
#include <windows.h>
#include <signal.h>
#elif defined(XP_MAC)
#define TEMP_MAC_HACK
//------------------------
#ifdef TEMP_MAC_HACK
#include <MacTypes.h>
#include <Processes.h>
#include <string.h>
// TEMPORARY UNTIL WE HAVE MACINTOSH ENVIRONMENT VARIABLES THAT CAN TURN ON
// LOGGING ON MACINTOSH
// At this moment, NSPR's logging is a no-op on Macintosh.
#include <stdarg.h>
#include <stdio.h>
#undef PR_LOG
#undef PR_LogFlush
#define PR_LOG(module,level,args) dprintf args
#define PR_LogFlush()
static void dprintf(const char *format, ...)
{
va_list ap;
Str255 buffer;
va_start(ap, format);
buffer[0] = std::vsnprintf((char *)buffer + 1, sizeof(buffer) - 1, format, ap);
va_end(ap);
if (PL_strcasestr((char *)&buffer[1], "warning"))
printf("<EFBFBD><EFBFBD><EFBFBD>%s\n", (char*)buffer + 1);
else
DebugStr(buffer);
}
#endif // TEMP_MAC_HACK
//------------------------
#elif defined(XP_UNIX)
#include<stdlib.h>
#endif
/**
* Define output so users will always see it
*/
#if defined(XP_UNIX) || defined(_WIN32)
#define DBG_LOG(log,err,pargs) \
InitLog(); \
PR_LOG(log,err,pargs); \
PR_LogFlush(); \
printf pargs; putchar('\n');
#else
#define DBG_LOG(log,err,pargs) \
InitLog(); \
PR_LOG(log,err,pargs); \
PR_LogFlush();
#endif
/*
* Determine if debugger is present in windows.
*/
#if defined (_WIN32)
typedef WINBASEAPI BOOL (WINAPI* LPFNISDEBUGGERPRESENT)();
PRBool InDebugger()
{
PRBool fReturn = PR_FALSE;
LPFNISDEBUGGERPRESENT lpfnIsDebuggerPresent = NULL;
HINSTANCE hKernel = LoadLibrary("Kernel32.dll");
if(hKernel)
{
lpfnIsDebuggerPresent =
(LPFNISDEBUGGERPRESENT)GetProcAddress(hKernel, "IsDebuggerPresent");
if(lpfnIsDebuggerPresent)
{
fReturn = (*lpfnIsDebuggerPresent)();
}
FreeLibrary(hKernel);
}
return fReturn;
}
#endif /* WIN32*/
/**
* Implementation of the nsDebug methods. Note that this code is
* always compiled in, in case some other module that uses it is
* compiled with debugging even if this library is not.
*/
static PRLogModuleInfo* gDebugLog;
static void InitLog(void)
{
if (0 == gDebugLog) {
gDebugLog = PR_NewLogModule("nsDebug");
gDebugLog->level = PR_LOG_DEBUG;
}
}
NS_COM void nsDebug::Assertion(const char* aStr, const char* aExpr,
const char* aFile, PRIntn aLine)
{
InitLog();
char buf[1000];
PR_snprintf(buf, sizeof(buf),
"###!!! ASSERTION: %s: '%s', file %s, line %d",
aStr, aExpr, aFile, aLine);
// Write out the assertion message to the debug log
PR_LOG(gDebugLog, PR_LOG_ERROR, ("%s", buf));
PR_LogFlush();
// And write it out to the stdout
printf("%s\n", buf);
fflush(stdout);
#if defined(_WIN32)
char* assertBehavior = getenv("XPCOM_DEBUG_BREAK");
if (assertBehavior && PL_strcmp(assertBehavior, "warn") == 0)
return;
if(!InDebugger())
{
DWORD code = IDRETRY;
/* Create the debug dialog out of process to avoid the crashes caused by
* Windows events leaking into our event loop from an in process dialog.
* We do this by launching windbgdlg.exe (built in xpcom/windbgdlg).
* See http://bugzilla.mozilla.org/show_bug.cgi?id=54792
*/
PROCESS_INFORMATION pi;
STARTUPINFO si;
char executable[MAX_PATH];
char* pName;
memset(&pi, 0, sizeof(pi));
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
si.wShowWindow = SW_SHOW;
if(GetModuleFileName(NULL, executable, MAX_PATH) &&
NULL != (pName = strrchr(executable, '\\')) &&
NULL != strcpy(pName+1, "windbgdlg.exe") &&
#ifdef DEBUG_jband
(printf("Launching %s\n", executable), PR_TRUE) &&
#endif
CreateProcess(executable, buf, NULL, NULL, PR_FALSE,
DETACHED_PROCESS | NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi) &&
WAIT_OBJECT_0 == WaitForSingleObject(pi.hProcess, INFINITE) &&
GetExitCodeProcess(pi.hProcess, &code))
{
CloseHandle(pi.hProcess);
}
switch(code)
{
case IDABORT:
//This should exit us
raise(SIGABRT);
//If we are ignored exit this way..
_exit(3);
break;
case IDIGNORE:
return;
// Fall Through
}
}
#endif
#if defined(XP_OS2)
char msg[1200];
PR_snprintf(msg, sizeof(msg),
"%s\n\nClick Cancel to Debug Application.\n"
"Click Enter to continue running the Application.", buf);
ULONG code = WinMessageBox(HWND_DESKTOP, HWND_DESKTOP, msg,
"nsDebug::Assertion", 0,
MB_ERROR | MB_ENTERCANCEL);
/* It is possible that we are executing on a thread that doesn't have a
* message queue. In that case, the message won't appear, and code will
* be 0xFFFF. We'll give the user a chance to debug it by calling
* Break()
* Actually, that's a really bad idea since this happens a lot with threadsafe
* assertions and since it means that you can't actually run the debug build
* outside a debugger without it crashing constantly.
*/
if(( code == MBID_ENTER ) || (code == MBID_ERROR))
{
return;
// If Retry, Fall Through
}
#endif
Break(aFile, aLine);
}
NS_COM void nsDebug::Break(const char* aFile, PRIntn aLine)
{
#ifndef TEMP_MAC_HACK
DBG_LOG(gDebugLog, PR_LOG_ERROR,
("###!!! Break: at file %s, line %d", aFile, aLine));
#if defined(_WIN32)
#ifdef _M_IX86
::DebugBreak();
#else /* _M_ALPHA */
fprintf(stderr, "Break: at file %s\n",aFile, aLine); fflush(stderr);
#endif
#elif defined(XP_UNIX) && !defined(UNIX_CRASH_ON_ASSERT)
fprintf(stderr, "\07");
char *assertBehavior = getenv("XPCOM_DEBUG_BREAK");
if (!assertBehavior) {
// the default; nothing else to do
;
} else if ( strcmp(assertBehavior, "suspend")== 0 ) {
// the suspend case is first because we wanna send the signal before
// other threads have had a chance to get too far from the state that
// caused this assertion (in case they happen to have been involved).
//
fprintf(stderr, "Suspending process; attach with the debugger.\n");
kill(0, SIGSTOP);
} else if ( strcmp(assertBehavior, "warn")==0 ) {
// same as default; nothing else to do (see "suspend" case comment for
// why this compare isn't done as part of the default case)
//
;
} else if ( strcmp(assertBehavior,"stack")==0 ) {
// walk the stack
//
nsTraceRefcnt::WalkTheStack(stderr);
} else if ( strcmp(assertBehavior,"abort")==0 ) {
// same as UNIX_CRASH_ON_ASSERT
//
Abort(aFile, aLine);
} else if ( strcmp(assertBehavior,"trap")==0 ) {
DebugBreak();
} else {
fprintf(stderr, "unrecognized value of XPCOM_DEBUG_BREAK env var!\n");
}
fflush(stderr); // this shouldn't really be necessary, i don't think,
// but maybe there's some lame stdio that buffers stderr
#elif defined(XP_BEOS)
{
#ifdef UNIX_CRASH_ON_ASSERT
char buf[2000];
sprintf(buf, "Break: at file %s, line %d", aFile, aLine);
DEBUGGER(buf);
#endif
}
#else
Abort(aFile, aLine);
#endif
#endif // TEMP_MAC_HACK
}
NS_COM void nsDebug::Warning(const char* aMessage,
const char* aFile, PRIntn aLine)
{
InitLog();
char buf[1000];
PR_snprintf(buf, sizeof(buf),
"WARNING: %s, file %s, line %d",
aMessage, aFile, aLine);
// Write out the warning message to the debug log
PR_LOG(gDebugLog, PR_LOG_ERROR, ("%s", buf));
// And write it out to the stdout
printf("%s\n", buf);
}
//**************** All Dead Code Below
// Don't use these!
NS_COM void nsDebug::AbortIfFalse(const char* aStr, const char* aExpr,
const char* aFile, PRIntn aLine)
{
Assertion(aStr, aExpr, aFile, aLine);
}
NS_COM PRBool nsDebug::WarnIfFalse(const char* aStr, const char* aExpr,
const char* aFile, PRIntn aLine)
{
Assertion(aStr, aExpr, aFile, aLine);
return PR_TRUE;
}
NS_COM void nsDebug::Abort(const char* aFile, PRIntn aLine)
{
DBG_LOG(gDebugLog, PR_LOG_ERROR,
("###!!! Abort: at file %s, line %d", aFile, aLine));
#if defined(_WIN32)
#ifdef _M_IX86
long* __p = (long*) 0x7;
*__p = 0x7;
#else /* _M_ALPHA */
fprintf(stderr, "\07 Abort\n"); fflush(stderr);
PR_Abort();
#endif
#elif defined(XP_MAC)
ExitToShell();
#elif defined(XP_UNIX)
PR_Abort();
#elif defined(XP_OS2)
DebugBreak();
return;
#elif defined(XP_BEOS)
{
#ifndef DEBUG_cls
char buf[2000];
sprintf(buf, "Abort: at file %s, line %d", aFile, aLine);
DEBUGGER(buf);
#endif
}
#endif
}
NS_COM void nsDebug::PreCondition(const char* aStr, const char* aExpr,
const char* aFile, PRIntn aLine)
{
Assertion(aStr, aExpr, aFile, aLine);
}
NS_COM void nsDebug::PostCondition(const char* aStr, const char* aExpr,
const char* aFile, PRIntn aLine)
{
Assertion(aStr, aExpr, aFile, aLine);
}
NS_COM void nsDebug::NotYetImplemented(const char* aMessage,
const char* aFile, PRIntn aLine)
{
Assertion(aMessage, "NotYetImplemented", aFile, aLine);
}
NS_COM void nsDebug::NotReached(const char* aMessage,
const char* aFile, PRIntn aLine)
{
Assertion(aMessage, "Not Reached", aFile, aLine);
}
NS_COM void nsDebug::Error(const char* aMessage,
const char* aFile, PRIntn aLine)
{
Assertion(aMessage, "Error", aFile, aLine);
}
////////////////////////////////////////////////////////////////////////////////
NS_COM nsresult
NS_ErrorAccordingToNSPR()
{
PRErrorCode err = PR_GetError();
switch (err) {
case PR_OUT_OF_MEMORY_ERROR: return NS_ERROR_OUT_OF_MEMORY;
case PR_WOULD_BLOCK_ERROR: return NS_BASE_STREAM_WOULD_BLOCK;
case PR_FILE_NOT_FOUND_ERROR: return NS_ERROR_FILE_NOT_FOUND;
case PR_READ_ONLY_FILESYSTEM_ERROR: return NS_ERROR_FILE_READ_ONLY;
case PR_NOT_DIRECTORY_ERROR: return NS_ERROR_FILE_NOT_DIRECTORY;
case PR_IS_DIRECTORY_ERROR: return NS_ERROR_FILE_IS_DIRECTORY;
case PR_LOOP_ERROR: return NS_ERROR_FILE_UNRESOLVABLE_SYMLINK;
case PR_FILE_EXISTS_ERROR: return NS_ERROR_FILE_ALREADY_EXISTS;
case PR_FILE_IS_LOCKED_ERROR: return NS_ERROR_FILE_IS_LOCKED;
case PR_FILE_TOO_BIG_ERROR: return NS_ERROR_FILE_TOO_BIG;
case PR_NO_DEVICE_SPACE_ERROR: return NS_ERROR_FILE_NO_DEVICE_SPACE;
case PR_NAME_TOO_LONG_ERROR: return NS_ERROR_FILE_NAME_TOO_LONG;
case PR_DIRECTORY_NOT_EMPTY_ERROR: return NS_ERROR_FILE_DIR_NOT_EMPTY;
case PR_NO_ACCESS_RIGHTS_ERROR: return NS_ERROR_FILE_ACCESS_DENIED;
default: return NS_ERROR_FAILURE;
}
}
////////////////////////////////////////////////////////////////////////////////
// This wrapper around PR_CurrentThread is simply here for debug builds so
// that clients linking with xpcom don't also have to link with nspr explicitly.
#if defined(NS_DEBUG) && defined(NS_MT_SUPPORTED)
#include "nsISupportsUtils.h"
#include "prthread.h"
extern "C" NS_EXPORT void* NS_CurrentThread(void);
extern "C" NS_EXPORT void NS_CheckThreadSafe(void* owningThread, const char* msg);
void*
NS_CurrentThread(void)
{
void* th = PR_CurrentThread();
return th;
}
/*
* DON'T TOUCH THAT DIAL...
* For now, we're making the thread-safety checking be on by default which, yes, slows
* down linux a bit... but we're doing it so that everybody has a chance to exercise
* their code a good deal before the beta. After we branch, we'll turn this back off
* and then you can enable it explicitly by setting XPCOM_CHECK_THREADSAFE. This will
* let you verify the thread-safety of your classes without impacting everyone all the
* time.
*/
static PRBool gCheckThreadSafeDefault = PR_TRUE; // READ THE ABOVE COMMENT FIRST!
void
NS_CheckThreadSafe(void* owningThread, const char* msg)
{
static int check = -1;
if (check == -1) {
const char *eVar = getenv("XPCOM_CHECK_THREADSAFE");
if (eVar && *eVar == '0')
check = 0;
else
check = gCheckThreadSafeDefault || eVar != 0;
}
if (check) {
NS_ASSERTION(owningThread == NS_CurrentThread(), msg);
}
}
#endif // !(defined(NS_DEBUG) && defined(NS_MT_SUPPORTED))
////////////////////////////////////////////////////////////////////////////////
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