Mirror/wren
1
0
Fork 1
mirror of https://github.com/wren-lang/wren.git synced 2026-01-11 22:28:45 +01:00
Code Issues Packages Projects Releases Wiki Activity

use push root instead of a handle for module GC protection

Browse Source 
related to d432b03d62
This commit is contained in:
underscorediscovery
2020-07-11 11:30:52 -07:00
parent d432b03d62
commit 2ce421eac5
1 changed files with 5 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/vm/wren_vm.c
View File

@ -446,20 +446,16 @@ static ObjClosure* compileInModule(WrenVM* vm, Value name, const char* source,
{
module = wrenNewModule(vm, AS_STRING(name));
// It's possible for the map set call below to resize the modules map,
// and trigger a GC while doing so. When this happens and there are enough
// objects and modules, it will collect the module we've just created.
// wrenPushRoot isn't an option when there are enough modules to exhaust
// WREN_MAX_TEMP_ROOTS, however handles are also not collected by GC.
// Note that this only affects the module until it's in the map, because
// then it has a reference to it, and won't be collected.
WrenHandle* moduleHandle = wrenMakeHandle(vm, OBJ_VAL(module));
// It's possible for the wrenMapSet below to resize the modules map,
// and trigger a GC while doing so. When this happens it will collect
// the module we've just created. Once in the map it is safe.
wrenPushRoot(vm, (Obj*)module);
// Store it in the VM's module registry so we don't load the same module
// multiple times.
wrenMapSet(vm, vm->modules, name, OBJ_VAL(module));
wrenReleaseHandle(vm, moduleHandle);
wrenPopRoot(vm);
// Implicitly import the core module.
ObjModule* coreModule = getModule(vm, NULL_VAL);