If this belongs in the v8-dev group please let me know.
I have a pool of Isolates that I manage and use to run scripts on various
threads.
I'm using Lockers, scopes etc... appropriately. The scripts are running
great.
However, at service shutdown time I iterate the Isolates and destroy them
one at a time like this:
m_pIsolate->Enter();
//Tell V8 that the JS Objects it is keeping alive are holding on to lots of
C++ native memory so it will trigger GC and call our MakeWeak destructor
callbacks!
m_pIsolate->AdjustAmountOfExternalAllocatedMemory(1025*1024*100);
//Pretend 100 MB is being held in our objects
V8::ContextDisposedNotification(); //Necessary to trigger GC.
while(!V8::IdleNotification(5000)) {}; //Try to trigger garbage collection
in V8
m_pIsolate->Exit();
m_pIsolate->Dispose();
m_pIsolate= NULL;
When I do, I get this:
#
# Fatal error in ..\..\src\heap.cc, line 438
# CHECK(allocation_allowed_ && gc_state_ == NOT_IN_GC) failed
#
Any ideas on what this means and why its happening?
*Here is the call stack:*
v8::internal::OS::DebugBreak() Line 1000 C++
v8::internal::OS::Abort() Line 991 C++
V8_Fatal(const char * file=0x009d04d4, int line=438, const char *
format=0x009d04c0, ...) Line 61 C++
v8::internal::Heap::GarbageCollectionPrologue() Line 438 + 0x33 bytes C++
v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace
space=OLD_POINTER_SPACE, v8::internal::GarbageCollector
collector=MARK_COMPACTOR, const char * gc_reason=0x009d37f8, const char *
collector_reason=0x009d014c) Line 644 C++
v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace
space=OLD_POINTER_SPACE, const char * gc_reason=0x009d37f8) Line 482 C++
v8::internal::Heap::CollectAllGarbage(int flags=2, const char *
gc_reason=0x009d37f8) Line 566 C++
v8::internal::Heap::IdleNotification(int hint=5000) Line 5683 C++
v8::internal::V8::IdleNotification(int hint=5000) Line 195 C++
v8::V8::IdleNotification(int hint=5000) Line 4837 + 0x9 bytes C++
*At crash time gc_state_ is set to MARK_COMPACT*
*gc_count_ is 24*
*Here's the V8 code causing the pain:*
void Heap::GarbageCollectionPrologue() {
isolate_->transcendental_cache()->Clear();
ClearJSFunctionResultCaches();
gc_count_++;
unflattened_strings_length_ = 0;
if (FLAG_flush_code && FLAG_flush_code_incrementally) {
mark_compact_collector()->EnableCodeFlushing(true);
}
#ifdef VERIFY_HEAP
if (FLAG_verify_heap) {
Verify();
}
#endif
#ifdef DEBUG
ASSERT(allocation_allowed_ && gc_state_ == NOT_IN_GC);
allow_allocation(false);
if (FLAG_gc_verbose) Print();
ReportStatisticsBeforeGC();
#endif // DEBUG
store_buffer()->GCPrologue();
}
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