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/*
* Copyright 2020 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.
*/
//
// Create `dynCall` helper functions used by emscripten. These allow JavaScript
// to call back into WebAssembly given a function pointer (table index). These
// are used primarily to implement the `invoke` functions which in turn are used
// to implment exceptions handling and setjmp/longjmp. Creates one for each
// signature in the indirect function table.
//
#include "abi/js.h"
#include "asm_v_wasm.h"
#include "ir/import-utils.h"
#include "pass.h"
#include "support/debug.h"
#include "wasm-emscripten.h"
#define DEBUG_TYPE "generate-dyncalls"
namespace wasm {
struct GenerateDynCalls : public WalkerPass<PostWalker<GenerateDynCalls>> {
GenerateDynCalls(bool onlyI64) : onlyI64(onlyI64) {}
void visitTable(Table* table) {
if (table->segments.size() > 0) {
EmscriptenGlueGenerator generator(*getModule());
generator.onlyI64DynCalls = onlyI64;
std::vector<Name> tableSegmentData;
for (const auto& indirectFunc : table->segments[0].data) {
generator.generateDynCallThunk(
getModule()->getFunction(indirectFunc)->sig);
}
}
}
bool onlyI64;
};
Pass* createGenerateDynCallsPass() { return new GenerateDynCalls(false); }
Pass* createGenerateI64DynCallsPass() { return new GenerateDynCalls(true); }
} // namespace wasm
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