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Tweaked stack allocation when inheriting VMs

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This commit is contained in:
Kayne Ruse
2026-04-26 10:14:19 +10:00
parent c9a34e2259
commit efc9fe1406
5 changed files with 23 additions and 20 deletions
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source/toy_vm.c
+14 -12
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@@ -355,7 +355,7 @@ static void processInvoke(Toy_VM* vm) {
case TOY_FUNCTION_CUSTOM: {
//spin up a new sub-vm
Toy_VM subVM;
Toy_inheritVM(&subVM, vm);
Toy_inheritVM(vm, &subVM);
Toy_bindVM(&subVM, fn->bytecode.code, fn->bytecode.parentScope);
//check args count
@@ -1070,7 +1070,7 @@ static unsigned int process(Toy_VM* vm) {
}
//exposed functions
void Toy_resetVM(Toy_VM* vm, bool preserveScope) {
void Toy_resetVM(Toy_VM* vm, bool preserveScope, bool preserveStack) {
vm->code = NULL;
vm->jumpsCount = 0;
@@ -1086,9 +1086,11 @@ void Toy_resetVM(Toy_VM* vm, bool preserveScope) {
vm->programCounter = 0;
Toy_resetStack(&vm->stack);
if (!preserveStack) {
Toy_resetStack(&vm->stack); //NOTE: has a realloc()
}
if (preserveScope == false) {
if (!preserveScope) {
vm->scope = Toy_popScope(vm->scope);
}
@@ -1103,18 +1105,18 @@ void Toy_initVM(Toy_VM* vm) {
vm->parentBucketHandle = NULL;
Toy_resetVM(vm, true);
Toy_resetVM(vm, true, true);
}
void Toy_inheritVM(Toy_VM* vm, Toy_VM* parent) {
void Toy_inheritVM(Toy_VM* parentVM, Toy_VM* subVM) {
//inherent persistent memory
vm->scope = NULL;
vm->stack = Toy_allocateStack();
vm->memoryBucket = parent->memoryBucket;
subVM->scope = NULL;
subVM->stack = Toy_allocateStack();
subVM->memoryBucket = parentVM->memoryBucket;
vm->parentBucketHandle = &parent->memoryBucket; //track this to update it later
subVM->parentBucketHandle = &parentVM->memoryBucket; //track this to update it later
Toy_resetVM(vm, true);
Toy_resetVM(subVM, true, true);
}
void Toy_bindVM(Toy_VM* vm, unsigned char* bytecode, Toy_Scope* parentScope) {
@@ -1163,7 +1165,7 @@ unsigned int Toy_runVM(Toy_VM* vm) {
}
void Toy_freeVM(Toy_VM* vm) {
Toy_resetVM(vm, false);
Toy_resetVM(vm, false, true);
//clear the persistent memory
Toy_freeStack(vm->stack);