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Support custom stack guard size (#1368)

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Add a new option WAMR_BUILD_STACK_GUARD_SIZE to set the custom
stack guard size. For most RTOS systems, we use the native stack base
address as the check boundary which may be not safe as POSIX based
systems (like Linux).
This commit is contained in:
Huang Qi
2022-08-12 10:17:11 +08:00
committed by GitHub
parent e23acfab36
commit 88cf1e36c1
5 changed files with 16 additions and 5 deletions
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6
core/config.h
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@ -343,12 +343,12 @@
/* Reserved bytes to the native thread stack boundary, throw native
stack overflow exception if the guard boudary is reached */
#ifndef RESERVED_BYTES_TO_NATIVE_STACK_BOUNDARY
#ifndef WASM_STACK_GUARD_SIZE
#if WASM_ENABLE_UVWASI != 0
/* UVWASI requires larger native stack */
#define RESERVED_BYTES_TO_NATIVE_STACK_BOUNDARY (4096 * 6)
#define WASM_STACK_GUARD_SIZE (4096 * 6)
#else
#define RESERVED_BYTES_TO_NATIVE_STACK_BOUNDARY (1024)
#define WASM_STACK_GUARD_SIZE (1024)
#endif
#endif

5
core/iwasm/common/wasm_exec_env.c
View File

@ -189,9 +189,10 @@ wasm_exec_env_set_module_inst(WASMExecEnv *exec_env,
void
wasm_exec_env_set_thread_info(WASMExecEnv *exec_env)
{
uint8 *stack_boundary = os_thread_get_stack_boundary();
exec_env->handle = os_self_thread();
exec_env->native_stack_boundary = os_thread_get_stack_boundary()
+ RESERVED_BYTES_TO_NATIVE_STACK_BOUNDARY;
exec_env->native_stack_boundary =
stack_boundary ? stack_boundary + WASM_STACK_GUARD_SIZE : NULL;
}
#if WASM_ENABLE_THREAD_MGR != 0