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Refine AOT exception check when function return (#1752)

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Refine AOT exception check in the caller when returning from callee function,
remove the exception check instructions when hw bound check is enabled to
improve the performance: create guard page to trigger signal handler when
exception occurs.
This commit is contained in:
Wenyong Huang
2022-11-30 20:18:28 +08:00
committed by GitHub
parent 7cb1ebc771
commit ce3458da99
8 changed files with 163 additions and 50 deletions
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5
core/iwasm/common/wasm_exec_env.h
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@ -137,6 +137,8 @@ typedef struct WASMExecEnv {
#ifdef OS_ENABLE_HW_BOUND_CHECK
WASMJmpBuf *jmpbuf_stack_top;
/* One guard page for the exception check */
uint8 *exce_check_guard_page;
#endif
#if WASM_ENABLE_MEMORY_PROFILING != 0
@ -199,7 +201,8 @@ wasm_exec_env_alloc_wasm_frame(WASMExecEnv *exec_env, unsigned size)
the outs area contains const cells, its size may be larger than current
frame size, we should check again before putting the function arguments
into the outs area. */
if (addr + size * 2 > exec_env->wasm_stack.s.top_boundary) {
if (size * 2
> (uint32)(uintptr_t)(exec_env->wasm_stack.s.top_boundary - addr)) {
/* WASM stack overflow. */
return NULL;
}