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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.
*/
//
// Similar to strip-ing a native binary, this family of passes can
// removes debug info and other things.
//
#include <functional>
#include "pass.h"
#include "wasm-binary.h"
#include "wasm.h"
namespace wasm {
struct Strip : public Pass {
bool requiresNonNullableLocalFixups() override { return false; }
// A function that returns true if the method should be removed.
using Decider = std::function<bool(CustomSection&)>;
Decider decider;
Strip(Decider decider) : decider(decider) {}
void run(Module* module) override {
// Remove name and debug sections.
auto& sections = module->customSections;
sections.erase(std::remove_if(sections.begin(), sections.end(), decider),
sections.end());
// If we're cleaning up debug info, clear on the function and module too.
CustomSection temp;
temp.name = BinaryConsts::CustomSections::Name;
if (decider(temp)) {
module->clearDebugInfo();
for (auto& func : module->functions) {
func->clearNames();
func->clearDebugInfo();
}
}
}
};
Pass* createStripDebugPass() {
return new Strip([&](const CustomSection& curr) {
return curr.name == BinaryConsts::CustomSections::Name ||
curr.name == BinaryConsts::CustomSections::SourceMapUrl ||
curr.name.find(".debug") == 0 || curr.name.find("reloc..debug") == 0;
});
}
Pass* createStripDWARFPass() {
return new Strip([&](const CustomSection& curr) {
return curr.name.find(".debug") == 0 || curr.name.find("reloc..debug") == 0;
});
}
Pass* createStripProducersPass() {
return new Strip([&](const CustomSection& curr) {
return curr.name == BinaryConsts::CustomSections::Producers;
});
}
} // namespace wasm
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