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// Copyright (c) 2015-2016 The Khronos Group Inc.
//
// 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 <cstdio>
#include <cstring>
#include <sstream>
#include <string>
#include <vector>
#include "spirv-tools/libspirv.h"
#include "tools/cfg/bin_to_dot.h"
#include "tools/io.h"
// Prints a program usage message to stdout.
static void print_usage(const char* argv0) {
printf(
R"(%s - Show the control flow graph in GraphiViz "dot" form. EXPERIMENTAL
Usage: %s [options] [<filename>]
The SPIR-V binary is read from <filename>. If no file is specified,
or if the filename is "-", then the binary is read from standard input.
Options:
-h, --help Print this help.
--version Display version information.
-o <filename> Set the output filename.
Output goes to standard output if this option is
not specified, or if the filename is "-".
)",
argv0, argv0);
}
static const auto kDefaultEnvironment = SPV_ENV_UNIVERSAL_1_6;
int main(int argc, char** argv) {
const char* inFile = nullptr;
const char* outFile = nullptr; // Stays nullptr if printing to stdout.
for (int argi = 1; argi < argc; ++argi) {
if ('-' == argv[argi][0]) {
switch (argv[argi][1]) {
case 'h':
print_usage(argv[0]);
return 0;
case 'o': {
if (!outFile && argi + 1 < argc) {
outFile = argv[++argi];
} else {
print_usage(argv[0]);
return 1;
}
} break;
case '-': {
// Long options
if (0 == strcmp(argv[argi], "--help")) {
print_usage(argv[0]);
return 0;
}
if (0 == strcmp(argv[argi], "--version")) {
printf("%s EXPERIMENTAL\n", spvSoftwareVersionDetailsString());
printf("Target: %s\n",
spvTargetEnvDescription(kDefaultEnvironment));
return 0;
}
print_usage(argv[0]);
return 1;
}
case 0: {
// Setting a filename of "-" to indicate stdin.
if (!inFile) {
inFile = argv[argi];
} else {
fprintf(stderr, "error: More than one input file specified\n");
return 1;
}
} break;
default:
print_usage(argv[0]);
return 1;
}
} else {
if (!inFile) {
inFile = argv[argi];
} else {
fprintf(stderr, "error: More than one input file specified\n");
return 1;
}
}
}
// Read the input binary.
std::vector<uint32_t> contents;
if (!ReadBinaryFile<uint32_t>(inFile, &contents)) return 1;
spv_context context = spvContextCreate(kDefaultEnvironment);
spv_diagnostic diagnostic = nullptr;
std::stringstream ss;
auto error =
BinaryToDot(context, contents.data(), contents.size(), &ss, &diagnostic);
if (error) {
spvDiagnosticPrint(diagnostic);
spvDiagnosticDestroy(diagnostic);
spvContextDestroy(context);
return error;
}
std::string str = ss.str();
WriteFile(outFile, "w", str.data(), str.size());
spvDiagnosticDestroy(diagnostic);
spvContextDestroy(context);
return 0;
}
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