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/*
* Copyright 2016 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 <algorithm>
#include <cassert>
#include <cerrno>
#include <cinttypes>
#include <cstdio>
#include <cstdlib>
#include <map>
#include <vector>
#include "src/binary-reader.h"
#include "src/binary-reader-opcnt.h"
#include "src/option-parser.h"
#include "src/stream.h"
#define ERROR(fmt, ...) \
fprintf(stderr, "%s:%d: " fmt, __FILE__, __LINE__, __VA_ARGS__)
using namespace wabt;
static int s_verbose;
static const char* s_infile;
static const char* s_outfile;
static size_t s_cutoff = 0;
static const char* s_separator = ": ";
static ReadBinaryOptions s_read_binary_options;
static std::unique_ptr<FileStream> s_log_stream;
static Features s_features;
static const char s_description[] =
R"( Read a file in the wasm binary format, and count opcode usage for
instructions.
examples:
# parse binary file test.wasm and write pcode dist file test.dist
$ wasm-opcodecnt test.wasm -o test.dist
)";
static void ParseOptions(int argc, char** argv) {
OptionParser parser("wasm-opcodecnt", s_description);
parser.AddOption('v', "verbose", "Use multiple times for more info", []() {
s_verbose++;
s_log_stream = FileStream::CreateStderr();
s_read_binary_options.log_stream = s_log_stream.get();
});
s_features.AddOptions(&parser);
parser.AddOption('o', "output", "FILENAME",
"Output file for the opcode counts, by default use stdout",
[](const char* argument) { s_outfile = argument; });
parser.AddOption(
'c', "cutoff", "N", "Cutoff for reporting counts less than N",
[](const std::string& argument) { s_cutoff = atol(argument.c_str()); });
parser.AddOption(
's', "separator", "SEPARATOR",
"Separator text between element and count when reporting counts",
[](const char* argument) { s_separator = argument; });
parser.AddArgument("filename", OptionParser::ArgumentCount::OneOrMore,
[](const char* argument) { s_infile = argument; });
parser.Parse(argc, argv);
}
template <typename T>
struct SortByCountDescending {
bool operator()(const T& lhs, const T& rhs) const {
return lhs.second > rhs.second;
}
};
template <typename T>
struct WithinCutoff {
bool operator()(const T& pair) const {
return pair.second >= s_cutoff;
}
};
static size_t SumCounts(const OpcodeInfoCounts& info_counts) {
size_t sum = 0;
for (auto& pair : info_counts) {
sum += pair.second;
}
return sum;
}
void WriteCounts(Stream& stream, const OpcodeInfoCounts& info_counts) {
typedef std::pair<Opcode, size_t> OpcodeCountPair;
std::map<Opcode, size_t> counts;
for (auto& info_count_pair: info_counts) {
Opcode opcode = info_count_pair.first.opcode();
size_t count = info_count_pair.second;
counts[opcode] += count;
}
std::vector<OpcodeCountPair> sorted;
std::copy_if(counts.begin(), counts.end(), std::back_inserter(sorted),
WithinCutoff<OpcodeCountPair>());
// Use a stable sort to keep the elements with the same count in opcode
// order (since the Opcode map is sorted).
std::stable_sort(sorted.begin(), sorted.end(),
SortByCountDescending<OpcodeCountPair>());
for (auto& pair : sorted) {
Opcode opcode = pair.first;
size_t count = pair.second;
stream.Writef("%s%s%" PRIzd "\n", opcode.GetName(), s_separator, count);
}
}
void WriteCountsWithImmediates(Stream& stream,
const OpcodeInfoCounts& counts) {
// Remove const from the key type so we can sort below.
typedef std::pair<std::remove_const<OpcodeInfoCounts::key_type>::type,
OpcodeInfoCounts::mapped_type>
OpcodeInfoCountPair;
std::vector<OpcodeInfoCountPair> sorted;
std::copy_if(counts.begin(), counts.end(), std::back_inserter(sorted),
WithinCutoff<OpcodeInfoCountPair>());
// Use a stable sort to keep the elements with the same count in opcode info
// order (since the OpcodeInfoCounts map is sorted).
std::stable_sort(sorted.begin(), sorted.end(),
SortByCountDescending<OpcodeInfoCountPair>());
for (auto& pair : sorted) {
auto&& info = pair.first;
size_t count = pair.second;
info.Write(stream);
stream.Writef("%s%" PRIzd "\n", s_separator, count);
}
}
int ProgramMain(int argc, char** argv) {
InitStdio();
ParseOptions(argc, argv);
std::vector<uint8_t> file_data;
Result result = ReadFile(s_infile, &file_data);
if (Failed(result)) {
const char* input_name = s_infile ? s_infile : "stdin";
ERROR("Unable to parse: %s", input_name);
return 1;
}
FileStream stream(s_outfile ? FileStream(s_outfile) : FileStream(stdout));
if (Succeeded(result)) {
OpcodeInfoCounts counts;
s_read_binary_options.features = s_features;
result = ReadBinaryOpcnt(file_data.data(), file_data.size(),
s_read_binary_options, &counts);
if (Succeeded(result)) {
stream.Writef("Total opcodes: %" PRIzd "\n\n", SumCounts(counts));
stream.Writef("Opcode counts:\n");
WriteCounts(stream, counts);
stream.Writef("\nOpcode counts with immediates:\n");
WriteCountsWithImmediates(stream, counts);
}
}
return result != Result::Ok;
}
int main(int argc, char** argv) {
WABT_TRY
return ProgramMain(argc, argv);
WABT_CATCH_BAD_ALLOC_AND_EXIT
}
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