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pjs/xpcom/base/nsDebugImpl.cpp

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C++
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* IBM Corp.
* Henry Sobotka
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDebugImpl.h"
#include "nsDebug.h"
#include "prprf.h"
#include "prlog.h"
#include "prinit.h"
#include "plstr.h"
#include "nsError.h"
#include "prerror.h"
#include "prerr.h"
#include "prenv.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
#include "nsTraceRefcntImpl.h"
#include "nsISupportsUtils.h"
#if defined(XP_UNIX)
#include <signal.h>
#endif
static void
Abort(const char *aMsg);
static void
Break(const char *aMsg);
#if defined(XP_OS2)
# define INCL_WINDIALOGS // need for WinMessageBox
# include <os2.h>
# include <string.h>
#endif /* XP_OS2 */
#if defined(_WIN32)
#include <windows.h>
#include <signal.h>
#include <malloc.h> // for _alloca
#elif defined(XP_UNIX)
#include <stdlib.h>
#endif
/*
* Determine if debugger is present in windows.
*/
#if defined (_WIN32)
typedef WINBASEAPI BOOL (WINAPI* LPFNISDEBUGGERPRESENT)();
PRBool InDebugger()
{
#ifndef WINCE
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;
#else
return PR_FALSE;
#endif
}
#endif /* WIN32*/
NS_IMPL_QUERY_INTERFACE1(nsDebugImpl, nsIDebug)
NS_IMETHODIMP_(nsrefcnt)
nsDebugImpl::AddRef()
{
return 2;
}
NS_IMETHODIMP_(nsrefcnt)
nsDebugImpl::Release()
{
return 1;
}
NS_IMETHODIMP
nsDebugImpl::Assertion(const char *aStr, const char *aExpr,
const char *aFile, PRInt32 aLine)
{
NS_DebugBreak(NS_DEBUG_ASSERTION, aStr, aExpr, aFile, aLine);
return NS_OK;
}
NS_IMETHODIMP
nsDebugImpl::Warning(const char *aStr, const char *aFile, PRInt32 aLine)
{
NS_DebugBreak(NS_DEBUG_WARNING, aStr, nsnull, aFile, aLine);
return NS_OK;
}
NS_IMETHODIMP
nsDebugImpl::Break(const char *aFile, PRInt32 aLine)
{
NS_DebugBreak(NS_DEBUG_BREAK, nsnull, nsnull, aFile, aLine);
return NS_OK;
}
NS_IMETHODIMP
nsDebugImpl::Abort(const char *aFile, PRInt32 aLine)
{
NS_DebugBreak(NS_DEBUG_ABORT, nsnull, nsnull, aFile, aLine);
return NS_OK;
}
/**
* 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;
}
}
enum nsAssertBehavior {
NS_ASSERT_UNINITIALIZED,
NS_ASSERT_WARN,
NS_ASSERT_SUSPEND,
NS_ASSERT_STACK,
NS_ASSERT_TRAP,
NS_ASSERT_ABORT,
NS_ASSERT_STACK_AND_ABORT
};
static nsAssertBehavior GetAssertBehavior()
{
static nsAssertBehavior gAssertBehavior = NS_ASSERT_UNINITIALIZED;
if (gAssertBehavior != NS_ASSERT_UNINITIALIZED)
return gAssertBehavior;
#if defined(XP_WIN) || defined(XP_OS2)
gAssertBehavior = NS_ASSERT_TRAP;
#else
gAssertBehavior = NS_ASSERT_WARN;
#endif
const char *assertString = PR_GetEnv("XPCOM_DEBUG_BREAK");
if (!assertString || !*assertString)
return gAssertBehavior;
if (!strcmp(assertString, "warn"))
return gAssertBehavior = NS_ASSERT_WARN;
if (!strcmp(assertString, "suspend"))
return gAssertBehavior = NS_ASSERT_SUSPEND;
if (!strcmp(assertString, "stack"))
return gAssertBehavior = NS_ASSERT_STACK;
if (!strcmp(assertString, "abort"))
return gAssertBehavior = NS_ASSERT_ABORT;
if (!strcmp(assertString, "trap") || !strcmp(assertString, "break"))
return gAssertBehavior = NS_ASSERT_TRAP;
if (!strcmp(assertString, "stack-and-abort"))
return gAssertBehavior = NS_ASSERT_STACK_AND_ABORT;
fprintf(stderr, "Unrecognized value of XPCOM_DEBUG_BREAK\n");
return gAssertBehavior;
}
struct FixedBuffer
{
FixedBuffer() : curlen(0) { buffer[0] = '\0'; }
char buffer[1000];
PRUint32 curlen;
};
static PRIntn
StuffFixedBuffer(void *closure, const char *buf, PRUint32 len)
{
if (!len)
return 0;
FixedBuffer *fb = (FixedBuffer*) closure;
// strip the trailing null, we add it again later
if (buf[len - 1] == '\0')
--len;
if (fb->curlen + len >= sizeof(fb->buffer))
len = sizeof(fb->buffer) - fb->curlen - 1;
if (len) {
memcpy(fb->buffer + fb->curlen, buf, len);
fb->curlen += len;
fb->buffer[fb->curlen] = '\0';
}
return len;
}
EXPORT_XPCOM_API(void)
NS_DebugBreak(PRUint32 aSeverity, const char *aStr, const char *aExpr,
const char *aFile, PRInt32 aLine)
{
InitLog();
FixedBuffer buf;
PRLogModuleLevel ll = PR_LOG_WARNING;
const char *sevString = "WARNING";
switch (aSeverity) {
case NS_DEBUG_ASSERTION:
sevString = "###!!! ASSERTION";
ll = PR_LOG_ERROR;
break;
case NS_DEBUG_BREAK:
sevString = "###!!! BREAK";
ll = PR_LOG_ALWAYS;
break;
case NS_DEBUG_ABORT:
sevString = "###!!! ABORT";
ll = PR_LOG_ALWAYS;
break;
default:
aSeverity = NS_DEBUG_WARNING;
};
PR_sxprintf(StuffFixedBuffer, &buf, "%s: ", sevString);
if (aStr)
PR_sxprintf(StuffFixedBuffer, &buf, "%s: ", aStr);
if (aExpr)
PR_sxprintf(StuffFixedBuffer, &buf, "'%s', ", aExpr);
if (aFile)
PR_sxprintf(StuffFixedBuffer, &buf, "file %s, ", aFile);
if (aLine != -1)
PR_sxprintf(StuffFixedBuffer, &buf, "line %d", aLine);
// Write out the message to the debug log
PR_LOG(gDebugLog, ll, ("%s", buf.buffer));
PR_LogFlush();
// errors on platforms without a debugdlg ring a bell on stderr
#if !defined(XP_WIN) && !defined(XP_OS2)
if (ll != PR_LOG_WARNING)
fprintf(stderr, "\07");
#endif
// Write the message to stderr
fprintf(stderr, "%s\n", buf.buffer);
fflush(stderr);
switch (aSeverity) {
case NS_DEBUG_WARNING:
return;
case NS_DEBUG_BREAK:
Break(buf.buffer);
return;
case NS_DEBUG_ABORT:
nsTraceRefcntImpl::WalkTheStack(stderr);
Abort(buf.buffer);
return;
}
// Now we deal with assertions
switch (GetAssertBehavior()) {
case NS_ASSERT_WARN:
return;
case NS_ASSERT_SUSPEND:
#ifdef XP_UNIX
fprintf(stderr, "Suspending process; attach with the debugger.\n");
kill(0, SIGSTOP);
#else
Break(buf.buffer);
#endif
return;
case NS_ASSERT_STACK:
nsTraceRefcntImpl::WalkTheStack(stderr);
return;
case NS_ASSERT_STACK_AND_ABORT:
nsTraceRefcntImpl::WalkTheStack(stderr);
// Fall through to abort
case NS_ASSERT_ABORT:
Abort(buf.buffer);
return;
case NS_ASSERT_TRAP:
Break(buf.buffer);
}
}
static void
Abort(const char *aMsg)
{
#if defined(_WIN32)
//This should exit us
raise(SIGABRT);
//If we are ignored exit this way..
_exit(3);
#elif defined(XP_UNIX)
PR_Abort();
#elif defined(XP_BEOS)
{
#ifndef DEBUG_cls
DEBUGGER(aMsg);
#endif
}
#else
// Don't know how to abort on this platform! call Break() instead
Break(aMsg);
#endif
}
// Abort() calls this function, don't call it!
static void
Break(const char *aMsg)
{
#if defined(_WIN32)
#ifndef WINCE // we really just want to crash for now
static int ignoreDebugger;
if (!ignoreDebugger) {
const char *shouldIgnoreDebugger = getenv("XPCOM_DEBUG_DLG");
ignoreDebugger = 1 + (shouldIgnoreDebugger && !strcmp(shouldIgnoreDebugger, "1"));
}
if((ignoreDebugger == 2) || !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;
// 2nd arg of CreateProcess is in/out
char *msgCopy = (char*) _alloca(strlen(aMsg) + 1);
strcpy(msgCopy, aMsg);
if(GetModuleFileName(GetModuleHandle("xpcom.dll"), executable, MAX_PATH) &&
NULL != (pName = strrchr(executable, '\\')) &&
NULL != strcpy(pName+1, "windbgdlg.exe") &&
CreateProcess(executable, msgCopy, NULL, NULL, PR_FALSE,
DETACHED_PROCESS | NORMAL_PRIORITY_CLASS,
NULL, NULL, &si, &pi)) {
WaitForSingleObject(pi.hProcess, INFINITE);
GetExitCodeProcess(pi.hProcess, &code);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}
switch(code) {
case IDABORT:
//This should exit us
raise(SIGABRT);
//If we are ignored exit this way..
_exit(3);
case IDIGNORE:
return;
}
}
::DebugBreak();
#endif // WINCE
#elif 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.", aMsg);
ULONG code = MBID_ERROR;
code = WinMessageBox(HWND_DESKTOP, HWND_DESKTOP, msg,
"NSGlue_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;
asm("int $3");
#elif defined(XP_BEOS)
DEBUGGER(aMsg);
#elif defined(XP_MACOSX)
/* Note that we put this Mac OS X test above the GNUC/x86 test because the
* GNUC/x86 test is also true on Intel Mac OS X and we want the PPC/x86
* impls to be the same.
*/
raise(SIGTRAP);
#elif defined(__GNUC__) && (defined(__i386__) || defined(__i386) || defined(__x86_64__))
asm("int $3");
#else
// don't know how to break on this platform
#endif
}
static const nsDebugImpl kImpl;
NS_METHOD
nsDebugImpl::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
{
NS_ENSURE_NO_AGGREGATION(outer);
return const_cast<nsDebugImpl*>(&kImpl)->
QueryInterface(aIID, aInstancePtr);
}
////////////////////////////////////////////////////////////////////////////////
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;
}
}
////////////////////////////////////////////////////////////////////////////////
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