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/*
* Copyright 2017 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.
*/
#ifndef wasm_ir_trapping_h
#define wasm_ir_trapping_h
#include <exception>
#include "pass.h"
namespace wasm {
enum class TrapMode {
Allow,
Clamp,
JS
};
inline void addTrapModePass(PassRunner& runner, TrapMode trapMode) {
if (trapMode == TrapMode::Clamp) {
runner.add("trap-mode-clamp");
} else if (trapMode == TrapMode::JS) {
runner.add("trap-mode-js");
}
}
class TrappingFunctionContainer {
public:
TrappingFunctionContainer(TrapMode mode, Module &wasm, bool immediate = false)
: mode(mode),
wasm(wasm),
immediate(immediate) { }
bool hasFunction(Name name) {
return functions.find(name) != functions.end();
}
bool hasImport(Name name) {
return imports.find(name) != imports.end();
}
void addFunction(Function* function) {
functions[function->name] = function;
if (immediate) {
wasm.addFunction(function);
}
}
void addImport(Function* import) {
imports[import->name] = import;
if (immediate) {
wasm.addFunction(import);
}
}
void addToModule() {
if (!immediate) {
for (auto &pair : functions) {
wasm.addFunction(pair.second);
}
for (auto &pair : imports) {
wasm.addFunction(pair.second);
}
}
functions.clear();
imports.clear();
}
TrapMode getMode() {
return mode;
}
Module& getModule() {
return wasm;
}
std::map<Name, Function*>& getFunctions() {
return functions;
}
private:
std::map<Name, Function*> functions;
std::map<Name, Function*> imports;
TrapMode mode;
Module& wasm;
bool immediate;
};
Expression* makeTrappingBinary(Binary* curr, TrappingFunctionContainer &trappingFunctions);
Expression* makeTrappingUnary(Unary* curr, TrappingFunctionContainer &trappingFunctions);
inline TrapMode trapModeFromString(std::string const& str) {
if (str == "allow") {
return TrapMode::Allow;
} else if (str == "clamp") {
return TrapMode::Clamp;
} else if (str == "js") {
return TrapMode::JS;
} else {
throw std::invalid_argument(
"Unsupported trap mode \"" + str + "\". "
"Valid modes are \"allow\", \"js\", and \"clamp\"");
}
}
} // wasm
#endif // wasm_ir_trapping_h
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