JSBool
xpc_DumpEvalInJSStackFrame(JSContext* cx, uint32_t frameno, const char* text)
{
if (!cx || !text) {
DebugDump("%s", "invalid params passed to xpc_DumpEvalInJSStackFrame!\n");
return false;
}
DebugDump("js[%d]> %s\n", frameno, text);
uint32_t num = 0;
JSAbstractFramePtr frame = JSNullFramePtr();
JSBrokenFrameIterator iter(cx);
while (!iter.done()) {
if (num == frameno) {
frame = iter.abstractFramePtr();
break;
}
++iter;
num++;
}
if (!frame) {
DebugDump("%s", "invalid frame number!\n");
return false;
}
JSAutoRequest ar(cx);
JSExceptionState* exceptionState = JS_SaveExceptionState(cx);
JSErrorReporter older = JS_SetErrorReporter(cx, xpcDumpEvalErrorReporter);
jsval rval;
JSString* str;
JSAutoByteString bytes;
if (frame.evaluateInStackFrame(cx, text, strlen(text), "eval", 1, &rval) &&
nullptr != (str = JS_ValueToString(cx, rval)) &&
bytes.encode(cx, str)) {
DebugDump("%s\n", bytes.ptr());
} else
DebugDump("%s", "eval failed!\n");
JS_SetErrorReporter(cx, older);
JS_RestoreExceptionState(cx, exceptionState);
return true;
}
static void
_interpreterTrace(JSDContext* jsdc, JSContext *cx, JSAbstractFramePtr frame,
bool isConstructing, JSBool before)
{
JSDScript* jsdscript = NULL;
JSScript * script;
static indent = 0;
JSString* funName = NULL;
script = frame.script();
if(script)
{
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, frame);
JSD_UNLOCK_SCRIPTS(jsdc);
if(jsdscript)
funName = JSD_GetScriptFunctionId(jsdc, jsdscript);
}
if(before)
printf("%sentering ", _indentSpaces(indent++));
else
printf("%sleaving ", _indentSpaces(--indent));
if (!funName)
printf("TOP_LEVEL");
else
JS_FileEscapedString(stdout, funName, 0);
if(before)
{
jsval thisVal;
printf("%s this: ", isConstructing ? "constructing":"");
if (JS_GetFrameThis(cx, frame, &thisVal))
printf("0x%0llx", (uintptr_t) thisVal);
else
puts("<unavailable>");
}
printf("\n");
JS_ASSERT(indent >= 0);
}
void
jsd_Constructing(JSDContext* jsdc, JSContext *cx, JSObject *obj,
JSAbstractFramePtr frame)
{
JSDObject* jsdobj;
JS::RootedScript script(cx);
JSDScript* jsdscript;
const char* ctorURL;
JSString* ctorNameStr;
const char* ctorName;
JSD_LOCK_OBJECTS(jsdc);
jsdobj = jsd_GetJSDObjectForJSObject(jsdc, obj);
if( jsdobj && !jsdobj->ctorURL )
{
script = frame.script();
if( script )
{
ctorURL = JS_GetScriptFilename(cx, script);
if( ctorURL )
jsdobj->ctorURL = jsd_AddAtom(jsdc, ctorURL);
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, frame);
JSD_UNLOCK_SCRIPTS(jsdc);
if( jsdscript && (ctorNameStr = jsd_GetScriptFunctionId(jsdc, jsdscript)) ) {
if( (ctorName = JS_EncodeString(cx, ctorNameStr)) ) {
jsdobj->ctorName = jsd_AddAtom(jsdc, ctorName);
JS_free(cx, (void *) ctorName);
}
}
jsdobj->ctorLineno = JS_GetScriptBaseLineNumber(cx, script);
}
}
TRACEOBJ(jsdc, jsdobj, 3);
JSD_UNLOCK_OBJECTS(jsdc);
}
JSDThreadState*
jsd_NewThreadState(JSDContext* jsdc, JSContext *cx )
{
JSDThreadState* jsdthreadstate;
jsdthreadstate = (JSDThreadState*)calloc(1, sizeof(JSDThreadState));
if( ! jsdthreadstate )
return nullptr;
jsdthreadstate->context = cx;
jsdthreadstate->thread = JSD_CURRENT_THREAD();
JS_INIT_CLIST(&jsdthreadstate->stack);
jsdthreadstate->stackDepth = 0;
JS_BeginRequest(jsdthreadstate->context);
JSBrokenFrameIterator iter(cx);
while(!iter.done())
{
JSAbstractFramePtr frame = iter.abstractFramePtr();
JS::RootedScript script(cx, frame.script());
uintptr_t pc = (uintptr_t)frame.pc();
JS::RootedValue dummyThis(cx);
/*
* don't construct a JSDStackFrame for dummy frames (those without a
* |this| object, or native frames, if JSD_INCLUDE_NATIVE_FRAMES
* isn't set.
*/
if (frame.getThisValue(cx, &dummyThis))
{
bool isConstructing = iter.isConstructing();
JSDStackFrameInfo *frameInfo = _addNewFrame( jsdc, jsdthreadstate, script, pc, isConstructing, frame );
if ((jsdthreadstate->stackDepth == 0 && !frameInfo) ||
(jsdthreadstate->stackDepth == 1 && frameInfo &&
frameInfo->jsdscript && !JSD_IS_DEBUG_ENABLED(jsdc, frameInfo->jsdscript)))
{
/*
* if we failed to create the first frame, or the top frame
* is not enabled for debugging, fail the entire thread state.
*/
JS_INIT_CLIST(&jsdthreadstate->links);
JS_EndRequest(jsdthreadstate->context);
jsd_DestroyThreadState(jsdc, jsdthreadstate);
return nullptr;
}
}
++iter;
}
JS_EndRequest(jsdthreadstate->context);
if (jsdthreadstate->stackDepth == 0)
{
free(jsdthreadstate);
return nullptr;
}
JSD_LOCK_THREADSTATES(jsdc);
JS_APPEND_LINK(&jsdthreadstate->links, &jsdc->threadsStates);
JSD_UNLOCK_THREADSTATES(jsdc);
return jsdthreadstate;
}
JSBool
_callHook(JSDContext *jsdc, JSContext *cx, JSAbstractFramePtr frame, bool isConstructing,
JSBool before, unsigned type, JSD_CallHookProc hook, void *hookData)
{
JSDScript* jsdscript;
JSScript* jsscript;
JSBool hookresult = JS_TRUE;
if (!jsdc || !jsdc->inited)
return JS_FALSE;
if (!hook && !(jsdc->flags & JSD_COLLECT_PROFILE_DATA))
{
/* no hook to call, no profile data needs to be collected,
* so there is nothing to do here.
*/
return hookresult;
}
if (before && isConstructing) {
js::RootedValue newObj(cx);
if (!frame.getThisValue(cx, &newObj))
return JS_FALSE;
jsd_Constructing(jsdc, cx, JSVAL_TO_OBJECT(newObj), frame);
}
jsscript = frame.script();
if (jsscript)
{
JSD_LOCK_SCRIPTS(jsdc);
jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, jsscript, frame);
JSD_UNLOCK_SCRIPTS(jsdc);
if (jsdscript)
{
if (JSD_IS_PROFILE_ENABLED(jsdc, jsdscript))
{
JSDProfileData *pdata;
pdata = jsd_GetScriptProfileData (jsdc, jsdscript);
if (pdata)
{
if (before)
{
if (!pdata->lastCallStart)
{
int64_t now;
JSDProfileData *callerpdata;
/* Get the time just the once, for consistency. */
now = JS_Now();
/* This contains a pointer to the profile data for
* the caller of this function. */
callerpdata = jsdc->callingFunctionPData;
if (callerpdata)
{
int64_t ll_delta;
pdata->caller = callerpdata;
/* We need to 'stop' the timer for the caller.
* Use time since last return if appropriate. */
ll_delta = jsdc->lastReturnTime
? now - jsdc->lastReturnTime
: now - callerpdata->lastCallStart;
callerpdata->runningTime += ll_delta;
}
/* We're the new current function, and no return
* has happened yet. */
jsdc->callingFunctionPData = pdata;
jsdc->lastReturnTime = 0;
/* This function has no running time (just been
* called!), and we'll need the call start time. */
pdata->runningTime = 0;
pdata->lastCallStart = now;
} else {
if (++pdata->recurseDepth > pdata->maxRecurseDepth)
pdata->maxRecurseDepth = pdata->recurseDepth;
}
/* make sure we're called for the return too. */
hookresult = JS_TRUE;
} else if (!pdata->recurseDepth && pdata->lastCallStart) {
int64_t now, ll_delta;
double delta;
now = JS_Now();
ll_delta = now - pdata->lastCallStart;
delta = ll_delta;
delta /= 1000.0;
pdata->totalExecutionTime += delta;
/* minExecutionTime starts as 0, so we need to overwrite
* it on the first call always. */
if ((0 == pdata->callCount) ||
delta < pdata->minExecutionTime)
{
pdata->minExecutionTime = delta;
}
if (delta > pdata->maxExecutionTime)
pdata->maxExecutionTime = delta;
/* If we last returned from a function (as opposed to
* having last entered this function), we need to inc.
* the running total by the time delta since the last
* return, and use the running total instead of the
* delta calculated above. */
if (jsdc->lastReturnTime)
{
/* Add last chunk to running time, and use total
* running time as 'delta'. */
ll_delta = now - jsdc->lastReturnTime;
pdata->runningTime += ll_delta;
delta = pdata->runningTime;
delta /= 1000.0;
}
pdata->totalOwnExecutionTime += delta;
/* See minExecutionTime comment above. */
if ((0 == pdata->callCount) ||
delta < pdata->minOwnExecutionTime)
{
pdata->minOwnExecutionTime = delta;
}
if (delta > pdata->maxOwnExecutionTime)
pdata->maxOwnExecutionTime = delta;
/* Current function is now our caller. */
jsdc->callingFunctionPData = pdata->caller;
/* No hanging pointers, please. */
pdata->caller = NULL;
/* Mark the time we returned, and indicate this
* function is no longer running. */
jsdc->lastReturnTime = now;
pdata->lastCallStart = 0;
++pdata->callCount;
} else if (pdata->recurseDepth) {
--pdata->recurseDepth;
++pdata->callCount;
}
}
if (hook)
jsd_CallCallHook (jsdc, cx, type, hook, hookData);
} else {
if (hook)
hookresult =
jsd_CallCallHook (jsdc, cx, type, hook, hookData);
else
hookresult = JS_TRUE;
}
}
}
#ifdef JSD_TRACE
_interpreterTrace(jsdc, cx, frame, isConstructing, before);
return JS_TRUE;
#else
return hookresult;
#endif
}
