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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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
* 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 Communicator client code, released
* March 31, 1998.
* 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):
* 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 ***** */
* PR assertion checker.
#ifndef jsutil_h___
#define jsutil_h___
#include <stdlib.h>
* JS_Assert is present even in release builds, for the benefit of applications
* that build DEBUG and link against a non-DEBUG SpiderMonkey library.
extern JS_PUBLIC_API(void)
JS_Assert(const char *s, const char *file, JSIntn ln);
#ifdef DEBUG
#define JS_ASSERT(expr) \
((expr) ? (void)0 : JS_Assert(#expr, __FILE__, __LINE__))
#define JS_ASSERT_IF(cond, expr) \
((!(cond) || (expr)) ? (void)0 : JS_Assert(#expr, __FILE__, __LINE__))
#define JS_NOT_REACHED(reason) \
JS_Assert(reason, __FILE__, __LINE__)
#define JS_ASSERT(expr) ((void) 0)
#define JS_ASSERT_IF(cond,expr) ((void) 0)
#define JS_NOT_REACHED(reason)
#endif /* defined(DEBUG) */
* Compile-time assert. "cond" must be a constant expression.
* The macro can be used only in places where an "extern" declaration is
* allowed.
* Sun Studio C++ compiler has a bug
* "sizeof expression not accepted as size of array parameter"
* The bug number is 6688515. It is not public yet.
* Turn off this assert for Sun Studio until this bug is fixed.
#ifdef __SUNPRO_CC
#define JS_STATIC_ASSERT(cond)
#ifdef __COUNTER__
#define JS_STATIC_ASSERT_GLUE1(x,y) x##y
#define JS_STATIC_ASSERT(cond) \
typedef int JS_STATIC_ASSERT_GLUE(js_static_assert, __COUNTER__)[(cond) ? 1 : -1]
#define JS_STATIC_ASSERT(cond) extern void js_static_assert(int arg[(cond) ? 1 : -1])
#define JS_STATIC_ASSERT_IF(cond, expr) JS_STATIC_ASSERT(!(cond) || (expr))
* Abort the process in a non-graceful manner. This will cause a core file,
* call to the debugger or other moral equivalent as well as causing the
* entire process to stop.
extern JS_PUBLIC_API(void) JS_Abort(void);
#ifdef DEBUG
# define JS_BASIC_STATS 1
#ifdef DEBUG_brendan
#include <stdio.h>
typedef struct JSBasicStats {
uint32 num;
uint32 max;
double sum;
double sqsum;
uint32 logscale; /* logarithmic scale: 0 (linear), 2, 10 */
uint32 hist[11];
} JSBasicStats;
#define JS_INIT_STATIC_BASIC_STATS {0,0,0,0,0,{0,0,0,0,0,0,0,0,0,0,0}}
#define JS_BASIC_STATS_INIT(bs) memset((bs), 0, sizeof(JSBasicStats))
#define JS_BASIC_STATS_ACCUM(bs,val) \
JS_BasicStatsAccum(bs, val)
#define JS_MeanAndStdDevBS(bs,sigma) \
JS_MeanAndStdDev((bs)->num, (bs)->sum, (bs)->sqsum, sigma)
extern void
JS_BasicStatsAccum(JSBasicStats *bs, uint32 val);
extern double
JS_MeanAndStdDev(uint32 num, double sum, double sqsum, double *sigma);
extern void
JS_DumpBasicStats(JSBasicStats *bs, const char *title, FILE *fp);
extern void
JS_DumpHistogram(JSBasicStats *bs, FILE *fp);
#define JS_BASIC_STATS_ACCUM(bs,val) /* nothing */
#endif /* JS_BASIC_STATS */
#if defined(DEBUG_notme) && defined(XP_UNIX)
typedef struct JSCallsite JSCallsite;
struct JSCallsite {
uint32 pc;
char *name;
const char *library;
int offset;
JSCallsite *parent;
JSCallsite *siblings;
JSCallsite *kids;
void *handy;
extern JS_FRIEND_API(JSCallsite *)
JS_Backtrace(int skip);
extern JS_FRIEND_API(void)
JS_DumpBacktrace(JSCallsite *trace);
static JS_INLINE void* js_malloc(size_t bytes) {
if (bytes < sizeof(void*)) /* for asyncFree */
bytes = sizeof(void*);
return malloc(bytes);
static JS_INLINE void* js_calloc(size_t bytes) {
if (bytes < sizeof(void*)) /* for asyncFree */
bytes = sizeof(void*);
return calloc(bytes, 1);
static JS_INLINE void* js_realloc(void* p, size_t bytes) {
if (bytes < sizeof(void*)) /* for asyncFree */
bytes = sizeof(void*);
return realloc(p, bytes);
static JS_INLINE void js_free(void* p) {
#ifdef __cplusplus
* The following classes are designed to cause assertions to detect
* inadvertent use of guard objects as temporaries. In other words,
* when we have a guard object whose only purpose is its constructor and
* destructor (and is never otherwise referenced), the intended use
* might be:
* JSAutoTempValueRooter tvr(cx, 1, &val);
* but is is easy to accidentally write:
* JSAutoTempValueRooter(cx, 1, &val);
* which compiles just fine, but runs the destructor well before the
* intended time.
* They work by adding (#ifdef DEBUG) an additional parameter to the
* guard object's constructor, with a default value, so that users of
* the guard object's API do not need to do anything. The default value
* of this parameter is a temporary object. C++ (ISO/IEC 14882:1998),
* section 12.2 [class.temporary], clauses 4 and 5 seem to assume a
* guarantee that temporaries are destroyed in the reverse of their
* construction order, but I actually can't find a statement that that
* is true in the general case (beyond the two specific cases mentioned
* there). However, it seems to be true.
* These classes are intended to be used only via the macros immediately
* below them:
* JS_DECL_USE_GUARD_OBJECT_NOTIFIER declares (ifdef DEBUG) a member
* variable, and should be put where a declaration of a private
* member variable would be placed.
* JS_GUARD_OBJECT_NOTIFIER_PARAM should be placed at the end of the
* parameters to each constructor of the guard object; it declares
* (ifdef DEBUG) an additional parameter.
* JS_GUARD_OBJECT_NOTIFIER_INIT is a statement that belongs in each
* constructor. It uses the parameter declared by
#ifdef DEBUG
class JSGuardObjectNotifier
bool* mStatementDone;
JSGuardObjectNotifier() : mStatementDone(NULL) {}
~JSGuardObjectNotifier() {
*mStatementDone = true;
void SetStatementDone(bool *aStatementDone) {
mStatementDone = aStatementDone;
class JSGuardObjectNotificationReceiver
bool mStatementDone;
JSGuardObjectNotificationReceiver() : mStatementDone(false) {}
~JSGuardObjectNotificationReceiver() {
* Assert that the guard object was not used as a temporary.
* (Note that this assert might also fire if Init is not called
* because the guard object's implementation is not using the
* above macros correctly.)
void Init(const JSGuardObjectNotifier &aNotifier) {
* aNotifier is passed as a const reference so that we can pass a
* temporary, but we really intend it as non-const
JSGuardObjectNotificationReceiver _mCheckNotUsedAsTemporary;
, const JSGuardObjectNotifier& _notifier = JSGuardObjectNotifier()
JS_BEGIN_MACRO _mCheckNotUsedAsTemporary.Init(_notifier); JS_END_MACRO
#else /* defined(DEBUG) */
#endif /* !defined(DEBUG) */
#endif /* defined(__cplusplus) */
#endif /* jsutil_h___ */
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