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/*
* Copyright 2018 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "wasm-rt.h"
#include "wasm-rt-exceptions.h"
#include <string.h>
#define MAX_EXCEPTION_SIZE 256
static WASM_RT_THREAD_LOCAL wasm_rt_tag_t g_active_exception_tag;
static WASM_RT_THREAD_LOCAL uint8_t g_active_exception[MAX_EXCEPTION_SIZE];
static WASM_RT_THREAD_LOCAL uint32_t g_active_exception_size;
static WASM_RT_THREAD_LOCAL wasm_rt_jmp_buf* g_unwind_target;
void wasm_rt_load_exception(const wasm_rt_tag_t tag,
uint32_t size,
const void* values) {
if (size > MAX_EXCEPTION_SIZE) {
wasm_rt_trap(WASM_RT_TRAP_EXHAUSTION);
}
g_active_exception_tag = tag;
g_active_exception_size = size;
if (size) {
memcpy(g_active_exception, values, size);
}
}
WASM_RT_NO_RETURN void wasm_rt_throw(void) {
WASM_RT_LONGJMP(*g_unwind_target, WASM_RT_TRAP_UNCAUGHT_EXCEPTION);
}
WASM_RT_UNWIND_TARGET* wasm_rt_get_unwind_target(void) {
return g_unwind_target;
}
void wasm_rt_set_unwind_target(WASM_RT_UNWIND_TARGET* target) {
g_unwind_target = target;
}
wasm_rt_tag_t wasm_rt_exception_tag(void) {
return g_active_exception_tag;
}
uint32_t wasm_rt_exception_size(void) {
return g_active_exception_size;
}
void* wasm_rt_exception(void) {
return g_active_exception;
}
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