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Bug 1146696 - Don't assume there are no arenas available after last ditch GC r=terrence

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This commit is contained in:
Jon Coppeard 2015-03-27 10:20:53 +00:00
parent 8ff8e6ccf2
commit 55e1d6be9c
3 changed files with 31 additions and 7 deletions
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14
js/src/gc/Allocator.cpp
View File

@ -232,7 +232,7 @@ GCRuntime::tryNewTenuredThing(ExclusiveContext *cx, AllocKind kind, size_t thing
{
T *t = reinterpret_cast<T *>(cx->arenas()->allocateFromFreeList(kind, thingSize));
if (!t)
t = reinterpret_cast<T *>(refillFreeListFromAnyThread<allowGC>(cx, kind));
t = reinterpret_cast<T *>(refillFreeListFromAnyThread<allowGC>(cx, kind, thingSize));
checkIncrementalZoneState(cx, t);
TraceTenuredAlloc(t, kind);
@ -241,19 +241,19 @@ GCRuntime::tryNewTenuredThing(ExclusiveContext *cx, AllocKind kind, size_t thing
template <AllowGC allowGC>
/* static */ void *
GCRuntime::refillFreeListFromAnyThread(ExclusiveContext *cx, AllocKind thingKind)
GCRuntime::refillFreeListFromAnyThread(ExclusiveContext *cx, AllocKind thingKind, size_t thingSize)
{
MOZ_ASSERT(cx->arenas()->freeLists[thingKind].isEmpty());
if (cx->isJSContext())
return refillFreeListFromMainThread<allowGC>(cx->asJSContext(), thingKind);
return refillFreeListFromMainThread<allowGC>(cx->asJSContext(), thingKind, thingSize);
return refillFreeListOffMainThread(cx, thingKind);
}
template <AllowGC allowGC>
/* static */ void *
GCRuntime::refillFreeListFromMainThread(JSContext *cx, AllocKind thingKind)
GCRuntime::refillFreeListFromMainThread(JSContext *cx, AllocKind thingKind, size_t thingSize)
{
JSRuntime *rt = cx->runtime();
MOZ_ASSERT(!rt->isHeapBusy(), "allocating while under GC");
@ -277,7 +277,11 @@ GCRuntime::refillFreeListFromMainThread(JSContext *cx, AllocKind thingKind)
}
// Retry the allocation after the last-ditch GC.
thing = tryRefillFreeListFromMainThread(cx, thingKind);
// Note that due to GC callbacks we might already have allocated an arena
// for this thing kind!
thing = cx->arenas()->allocateFromFreeList(thingKind, thingSize);
if (!thing)
thing = tryRefillFreeListFromMainThread(cx, thingKind);
if (thing)
return thing;

6
js/src/gc/GCRuntime.h
View File

@ -879,9 +879,11 @@ class GCRuntime
template <typename T>
static void checkIncrementalZoneState(ExclusiveContext *cx, T *t);
template <AllowGC allowGC>
static void *refillFreeListFromAnyThread(ExclusiveContext *cx, AllocKind thingKind);
static void *refillFreeListFromAnyThread(ExclusiveContext *cx, AllocKind thingKind,
size_t thingSize);
template <AllowGC allowGC>
static void *refillFreeListFromMainThread(JSContext *cx, AllocKind thingKind);
static void *refillFreeListFromMainThread(JSContext *cx, AllocKind thingKind,
size_t thingSize);
static void *tryRefillFreeListFromMainThread(JSContext *cx, AllocKind thingKind);
static void *refillFreeListOffMainThread(ExclusiveContext *cx, AllocKind thingKind);

18
js/src/jit-test/tests/gc/bug-1146696.js Normal file
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@ -0,0 +1,18 @@
// |jit-test| error: out of memory
dbg1 = new Debugger();
root2 = newGlobal();
dbg1.memory.onGarbageCollection = function(){}
dbg1.addDebuggee(root2);
for (var j = 0; j < 9999; ++j) {
try {
a
} catch (e) {}
}
gcparam("maxBytes", gcparam("gcBytes") + 1);
g();
function g() {
var x = "";
function f() {}
eval('');
g();
}