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Avoid JSArena as temp buffer in TraceRecorder::snapshot (variation of patch in bug 521880, r=me).

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This commit is contained in:
Andreas Gal 2009-10-12 22:41:08 -07:00
parent 123ea89fbf
commit 9d03f17cd2
2 changed files with 9 additions and 7 deletions
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14
js/src/jstracer.cpp
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@ -2310,7 +2310,8 @@ TraceRecorder::TraceRecorder(JSContext* cx, VMSideExit* _anchor, Fragment* _frag
mark(*JS_TRACE_MONITOR(cx).traceAlloc),
whichTreesToTrash(&tempAlloc),
cfgMerges(&tempAlloc),
monitorReason(reason)
monitorReason(reason),
tempTypeMap(cx)
{
JS_ASSERT(!_fragment->vmprivate && ti && cx->fp->regs->pc == (jsbytecode*)_fragment->ip);
/* Reset the fragment state we care about in case we got a recycled fragment.
@ -4010,9 +4011,11 @@ TraceRecorder::snapshot(ExitType exitType)
/* Capture the type map into a temporary location. */
unsigned ngslots = treeInfo->globalSlots->length();
unsigned typemap_size = (stackSlots + ngslots) * sizeof(JSTraceType);
void *mark = JS_ARENA_MARK(&cx->tempPool);
JSTraceType* typemap;
JS_ARENA_ALLOCATE_CAST(typemap, JSTraceType*, &cx->tempPool, typemap_size);
/* Use the recorder-local temporary type map. */
JSTraceType* typemap = NULL;
if (tempTypeMap.resize(typemap_size))
typemap = tempTypeMap.begin(); /* crash if resize() fails. */
/*
* Determine the type of a store by looking at the current type of the
@ -4073,7 +4076,6 @@ TraceRecorder::snapshot(ExitType exitType)
#if defined JS_JIT_SPEW
TreevisLogExit(cx, e);
#endif
JS_ARENA_RELEASE(&cx->tempPool, mark);
return e;
}
}
@ -4107,8 +4109,6 @@ TraceRecorder::snapshot(ExitType exitType)
#if defined JS_JIT_SPEW
TreevisLogExit(cx, exit);
#endif
JS_ARENA_RELEASE(&cx->tempPool, mark);
return exit;
}

2
js/src/jstracer.h
View File

@ -51,6 +51,7 @@
#include "jsinterp.h"
#include "jslock.h"
#include "jsnum.h"
#include "jsvector.h"
#if defined(DEBUG) && !defined(JS_JIT_SPEW)
#define JS_JIT_SPEW
@ -929,6 +930,7 @@ class TraceRecorder {
bool loop;
nanojit::LIns* loopLabel;
MonitorReason monitorReason;
js::Vector<JSTraceType, 256> tempTypeMap;
nanojit::LIns* insImmObj(JSObject* obj);
nanojit::LIns* insImmFun(JSFunction* fun);