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Merge pull request #222 from stesie/issue-217

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Send LowMemoryNotification before imposing memory limit
This commit is contained in:
Stefan Siegl 2016-03-27 00:57:39 +01:00
commit 1f54fac62d
2 changed files with 56 additions and 17 deletions
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20
v8js_timer.cc
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@ -40,6 +40,19 @@ static void v8js_timer_interrupt_handler(v8::Isolate *isolate, void *data) { /*
v8::Locker locker(isolate);
v8::HeapStatistics hs;
bool send_notification = false;
bool has_sent_notification = false;
do {
if (send_notification) {
#if PHP_V8_API_VERSION >= 3028036
isolate->LowMemoryNotification();
#else
v8::V8::LowMemoryNotification();
#endif
has_sent_notification = true;
}
isolate->GetHeapStatistics(&hs);
V8JSG(timer_mutex).lock();
@ -54,13 +67,20 @@ static void v8js_timer_interrupt_handler(v8::Isolate *isolate, void *data) { /*
}
if (timer_ctx->memory_limit > 0 && hs.used_heap_size() > timer_ctx->memory_limit) {
if (has_sent_notification) {
timer_ctx->killed = true;
v8::V8::TerminateExecution(c->isolate);
c->memory_limit_hit = true;
} else {
// force garbage collection, then check again
send_notification = true;
break;
}
}
}
V8JSG(timer_mutex).unlock();
} while(send_notification != has_sent_notification);
}
/* }}} */

19
v8js_v8.cc
View File

@ -204,6 +204,25 @@ void v8js_v8_call(v8js_ctx *c, zval **return_value,
return;
}
if (memory_limit && !c->memory_limit_hit) {
// Re-check memory limit (very short executions might never be hit by timer thread)
v8::HeapStatistics hs;
isolate->GetHeapStatistics(&hs);
if (hs.used_heap_size() > memory_limit) {
#if PHP_V8_API_VERSION >= 3028036
isolate->LowMemoryNotification();
#else
v8::V8::LowMemoryNotification();
#endif
isolate->GetHeapStatistics(&hs);
if (hs.used_heap_size() > memory_limit) {
c->memory_limit_hit = true;
}
}
}
if (c->memory_limit_hit) {
// Execution has been terminated due to memory limit
sprintf(exception_string, "Script memory limit of %lu bytes exceeded", memory_limit);