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67 lines
2.2 KiB
67 lines
2.2 KiB
/*
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* Copyright 2020, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <cstdio>
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#include <cstdlib>
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#include <string>
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#include <vector>
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#include <unistd.h>
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int main(int argc, const char **argv) {
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// Create a copy of argv strings that we can modify, and then eventually
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// const_cast away the const-ness of the buffers to call execv().
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std::vector<std::unique_ptr<std::string>> argv_strings;
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std::vector<const char *> argv_chars;
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// Replace lld.exe with lld-bin\lld.exe instead on Windows.
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argv_strings.push_back(std::make_unique<std::string>(argv[0]));
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size_t idx = argv_strings[0]->rfind("lld.exe");
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argv_strings[0]->insert(idx, "lld-bin\\");
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argv_chars.push_back(argv_strings[0]->c_str());
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// Make a copy of every other argv entry, and map a pointer to the C string
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// buffer as argv_chars for use with execv() later.
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for (int i = 1; i < argc; ++i) {
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argv_strings.push_back(std::make_unique<std::string>(argv[i]));
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argv_chars.push_back(argv_strings[i]->c_str());
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}
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// execv() expects a nullptr to terminate the argument list for argv.
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argv_chars.push_back(nullptr);
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// We cast away the const-ness of the char buffers, but it should be safe,
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// since we own these strings.
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int status = execv(argv_chars[0], const_cast<char **>(argv_chars.data()));
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// We shouldn't get here unless we failed to execute the new binary.
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if (status != 0) {
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std::string command;
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bool first = true;
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for (auto arg : argv_chars) {
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if (arg) {
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if (!first) {
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command.append(" ");
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} else {
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first = false;
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}
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command.append(arg);
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}
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}
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fprintf(stderr, "Failed to execute command: %s\n", command.c_str());
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}
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return status;
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}
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