diff options
Diffstat (limited to 'coroutine/asyncify/Context.h')
| -rw-r--r-- | coroutine/asyncify/Context.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/coroutine/asyncify/Context.h b/coroutine/asyncify/Context.h index 7dba829a1d..71791a4004 100644 --- a/coroutine/asyncify/Context.h +++ b/coroutine/asyncify/Context.h @@ -13,6 +13,7 @@ #include <stddef.h> #include <stdio.h> +#include <stdint.h> #include "wasm/asyncify.h" #include "wasm/machine.h" #include "wasm/fiber.h" @@ -47,10 +48,13 @@ static inline void coroutine_initialize_main(struct coroutine_context * context) static inline void coroutine_initialize(struct coroutine_context *context, coroutine_start start, void *stack, size_t size) { - if (ASYNCIFY_CORO_DEBUG) fprintf(stderr, "[%s] entry (context = %p, stack = %p ... %p)\n", __func__, context, stack, (char *)stack + size); + // Linear stack pointer must be always aligned down to 16 bytes. + // https://github.com/WebAssembly/tool-conventions/blob/c74267a5897c1bdc9aa60adeaf41816387d3cd12/BasicCABI.md#the-linear-stack + uintptr_t sp = ((uintptr_t)stack + size) & ~0xF; + if (ASYNCIFY_CORO_DEBUG) fprintf(stderr, "[%s] entry (context = %p, stack = %p ... %p)\n", __func__, context, stack, (char *)sp); rb_wasm_init_context(&context->fc, coroutine_trampoline, start, context); // record the initial stack pointer position to restore it after resumption - context->current_sp = (char *)stack + size; + context->current_sp = (char *)sp; context->stack_base = stack; context->size = size; } |