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Document how to use WASI threads in AOT mode (#1905)

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Describe how to use WASI threads in AOT mode, following the discussion below:
  https://github.com/bytecodealliance/wasm-micro-runtime/pull/1867#discussion_r1070268062

Make aux stack boundary checks of wasi-threads always successful by setting
`exec_env->aux_stack_bottom` to UINT32_MAX and `exec_env->aux_stack_boundary` to 0
This commit is contained in:
Enrico Loparco 2023-01-27 11:32:33 +01:00 committed by GitHub
parent 42f8fed20e
commit 2eed50b303
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 29 additions and 25 deletions
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20
core/iwasm/interpreter/wasm_interp_classic.c
View File

@ -1780,18 +1780,14 @@ wasm_interp_call_func_bytecode(WASMModuleInstance *module,
global = globals + global_idx;
global_addr = get_global_addr(global_data, global);
aux_stack_top = *(uint32 *)(frame_sp - 1);
if (wasm_exec_env_is_aux_stack_managed_by_runtime(exec_env)) {
if (aux_stack_top
<= exec_env->aux_stack_boundary.boundary) {
wasm_set_exception(module,
"wasm auxiliary stack overflow");
goto got_exception;
}
if (aux_stack_top > exec_env->aux_stack_bottom.bottom) {
wasm_set_exception(module,
"wasm auxiliary stack underflow");
goto got_exception;
}
if (aux_stack_top <= exec_env->aux_stack_boundary.boundary) {
wasm_set_exception(module, "wasm auxiliary stack overflow");
goto got_exception;
}
if (aux_stack_top > exec_env->aux_stack_bottom.bottom) {
wasm_set_exception(module,
"wasm auxiliary stack underflow");
goto got_exception;
}
*(int32 *)global_addr = aux_stack_top;
frame_sp--;

20
core/iwasm/interpreter/wasm_interp_fast.c
View File

@ -1576,18 +1576,14 @@ wasm_interp_call_func_bytecode(WASMModuleInstance *module,
global = globals + global_idx;
global_addr = get_global_addr(global_data, global);
aux_stack_top = frame_lp[GET_OFFSET()];
if (wasm_exec_env_is_aux_stack_managed_by_runtime(exec_env)) {
if (aux_stack_top
<= exec_env->aux_stack_boundary.boundary) {
wasm_set_exception(module,
"wasm auxiliary stack overflow");
goto got_exception;
}
if (aux_stack_top > exec_env->aux_stack_bottom.bottom) {
wasm_set_exception(module,
"wasm auxiliary stack underflow");
goto got_exception;
}
if (aux_stack_top <= exec_env->aux_stack_boundary.boundary) {
wasm_set_exception(module, "wasm auxiliary stack overflow");
goto got_exception;
}
if (aux_stack_top > exec_env->aux_stack_bottom.bottom) {
wasm_set_exception(module,
"wasm auxiliary stack underflow");
goto got_exception;
}
*(int32 *)global_addr = aux_stack_top;
#if WASM_ENABLE_MEMORY_PROFILING != 0

5
core/iwasm/libraries/thread-mgr/thread_manager.c
View File

@ -586,6 +586,11 @@ wasm_cluster_create_thread(WASMExecEnv *exec_env,
goto fail3;
}
}
else {
/* Disable aux stack */
new_exec_env->aux_stack_boundary.boundary = 0;
new_exec_env->aux_stack_bottom.bottom = UINT32_MAX;
}
if (!wasm_cluster_add_exec_env(cluster, new_exec_env))
goto fail3;

9
samples/wasi-threads/README.md
View File

@ -10,7 +10,7 @@ make \
THREAD_MODEL=posix
```
Build and run the samples
## Build and run the samples
```shell
$ mkdir build
@ -22,3 +22,10 @@ $ ./iwasm wasm-apps/no_pthread.wasm
...
$ ./iwasm wasm-apps/exception_propagation.wasm
```
## Run samples in AOT mode
```shell
$ ../../../wamr-compiler/build/wamrc \
-o wasm-apps/no_pthread.aot wasm-apps/no_pthread.wasm
$ ./iwasm wasm-apps/no_pthread.aot
```