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Bug 614333 - In aid of collecting empty script stats, add a frob to dump script statistics each time a new high number of scripts exist at one time, conditioned on DEBUG and the JS_DUMP_LIVE_SCRIPTS environment variable. r=brendan

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This commit is contained in:
Jeff Walden 2010-12-02 14:23:51 -08:00
parent 4a77e53dc1
commit bfb5f66584
2 changed files with 40 additions and 6 deletions
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1
js/src/jscntxt.h
View File

@ -1581,6 +1581,7 @@ struct JSRuntime {
jsrefcount totalScripts;
jsrefcount liveEmptyScripts;
jsrefcount totalEmptyScripts;
jsrefcount highWaterLiveScripts;
#endif /* DEBUG */
#ifdef JS_SCOPE_DEPTH_METER

45
js/src/jsscript.cpp
View File

@ -1152,8 +1152,24 @@ JSScript::NewScriptFromCG(JSContext *cx, JSCodeGenerator *cg)
fun->u.i.script = empty;
}
JS_RUNTIME_METER(cx->runtime, liveEmptyScripts);
JS_RUNTIME_METER(cx->runtime, totalEmptyScripts);
#ifdef DEBUG
{
jsrefcount newEmptyLive = JS_RUNTIME_METER(cx->runtime, liveEmptyScripts);
jsrefcount newLive = cx->runtime->liveScripts;
jsrefcount newTotal =
JS_RUNTIME_METER(cx->runtime, totalEmptyScripts) + cx->runtime->totalScripts;
jsrefcount oldHigh = cx->runtime->highWaterLiveScripts;
if (newEmptyLive + newLive > oldHigh) {
JS_ATOMIC_SET(&cx->runtime->highWaterLiveScripts, newEmptyLive + newLive);
if (getenv("JS_DUMP_LIVE_SCRIPTS")) {
fprintf(stderr, "high water script count: %d empty, %d not (total %d)\n",
newEmptyLive, newLive, newTotal);
}
}
}
#endif
return empty;
}
}
@ -1268,8 +1284,23 @@ JSScript::NewScriptFromCG(JSContext *cx, JSCodeGenerator *cg)
/* Tell the debugger about this compiled script. */
js_CallNewScriptHook(cx, script, fun);
JS_RUNTIME_METER(cx->runtime, liveScripts);
JS_RUNTIME_METER(cx->runtime, totalScripts);
#ifdef DEBUG
{
jsrefcount newLive = JS_RUNTIME_METER(cx->runtime, liveScripts);
jsrefcount newEmptyLive = cx->runtime->liveEmptyScripts;
jsrefcount newTotal =
JS_RUNTIME_METER(cx->runtime, totalScripts) + cx->runtime->totalEmptyScripts;
jsrefcount oldHigh = cx->runtime->highWaterLiveScripts;
if (newEmptyLive + newLive > oldHigh) {
JS_ATOMIC_SET(&cx->runtime->highWaterLiveScripts, newEmptyLive + newLive);
if (getenv("JS_DUMP_LIVE_SCRIPTS")) {
fprintf(stderr, "high water script count: %d empty, %d not (total %d)\n",
newEmptyLive, newLive, newTotal);
}
}
}
#endif
return script;
bad:
@ -1312,6 +1343,10 @@ DestroyScript(JSContext *cx, JSScript *script, JSThreadData *data)
return;
}
#ifdef DEBUG
JS_RUNTIME_UNMETER(cx->runtime, liveScripts);
#endif
js_CallDestroyScriptHook(cx, script);
JS_ClearScriptTraps(cx, script);
@ -1380,8 +1415,6 @@ DestroyScript(JSContext *cx, JSScript *script, JSThreadData *data)
JS_REMOVE_LINK(&script->links);
cx->free(script);
JS_RUNTIME_UNMETER(cx->runtime, liveScripts);
}
void