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Fix stack pointer corruption in binding-base.h

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刘皓 2025-04-16 19:21:48 -04:00
parent 3ace4ad6ae
commit 8e9e7700f0
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GPG key ID: 7901753DB465B711
1 changed files with 2 additions and 2 deletions
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4
binding-sandbox/binding-base.h
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@ -123,7 +123,6 @@ namespace mkxp_sandbox {
} }
static wasm_ptr_t init_inner(struct binding_base &bind, struct fiber &fiber) { static wasm_ptr_t init_inner(struct binding_base &bind, struct fiber &fiber) {
wasm_ptr_t sp = w2c_ruby_rb_wasm_get_stack_pointer(&bind.instance());
uint32_t state = w2c_ruby_asyncify_get_state(&bind.instance()); uint32_t state = w2c_ruby_asyncify_get_state(&bind.instance());
if (fiber.stack_ptr > fiber.stack.size()) { if (fiber.stack_ptr > fiber.stack.size()) {
@ -145,11 +144,12 @@ namespace mkxp_sandbox {
fiber.stack.pop_back(); fiber.stack.pop_back();
} }
++fiber.stack_ptr; ++fiber.stack_ptr;
wasm_ptr_t sp = w2c_ruby_rb_wasm_get_stack_pointer(&bind.instance()) - SIZEOF_WASMSTACKALIGN(T);
fiber.stack.emplace_back( fiber.stack.emplace_back(
bind, bind,
stack_frame_destructor, stack_frame_destructor,
boost::typeindex::type_id<T>(), boost::typeindex::type_id<T>(),
(sp -= SIZEOF_WASMSTACKALIGN(T)) sp
); );
assert(sp % sizeof(VALUE) == 0); assert(sp % sizeof(VALUE) == 0);
assert(sp % WASMSTACKALIGN == 0); assert(sp % WASMSTACKALIGN == 0);