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/*
* Copyright 2021 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_tools_wasm_split_instrumenter_h
#define wasm_tools_wasm_split_instrumenter_h
#include "pass.h"
#include "split-options.h"
#include "wasm.h"
namespace wasm {
struct InstrumenterConfig {
// The namespace from which to import the secondary memory
Name importNamespace = "env";
// The name of the secondary memory created to store profile data during
// instrumentation
Name secondaryMemoryName = "profile-data";
// Where to store the profile data
WasmSplitOptions::StorageKind storageKind =
WasmSplitOptions::StorageKind::InGlobals;
// The export name of the function the embedder calls to write the profile
// into memory
std::string profileExport = DEFAULT_PROFILE_EXPORT;
};
// Add a global monotonic counter and a timestamp global for each function, code
// at the beginning of each function to set its timestamp, and a new exported
// function for dumping the profile data.
struct Instrumenter : public Pass {
PassRunner* runner = nullptr;
Module* wasm = nullptr;
const InstrumenterConfig& config;
uint64_t moduleHash;
Name counterGlobal;
std::vector<Name> functionGlobals;
Name secondaryMemory;
Instrumenter(const InstrumenterConfig& config, uint64_t moduleHash);
void run(PassRunner* runner, Module* wasm) override;
private:
void addGlobals(size_t numFuncs);
void addSecondaryMemory(size_t numFuncs);
void instrumentFuncs();
void addProfileExport(size_t numFuncs);
};
} // namespace wasm
#endif // wasm_tools_wasm_split_instrumenter_h
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