mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 21:40:12 +01:00
Jon Ross-Perkins
e2256516e8
`args_.push_back(nullptr);` can resize `args_`, invalidating `argv`. The order needs to be switched.
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "common/init_llvm.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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namespace Carbon {
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InitLLVM::InitLLVM(int& argc, char**& argv)
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: init_llvm_(argc, argv),
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// LLVM assumes that argc and argv won't change, and registers them with
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// an `llvm::PrettyStackTraceProgram` that will crash if an argv element
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// gets nulled out, which for example `testing::InitGoogleTest` does. So
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// make a copy of the argv that LLVM produces in order to support
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// mutation.
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args_(argv, argv + argc) {
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// `argv[argc]` is expected to be a null pointer (may reallocate `args_`).
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args_.push_back(nullptr);
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// Return our mutable copy of argv for the program to use.
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argc = args_.size() - 1;
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argv = args_.data();
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llvm::setBugReportMsg(
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"Please report issues to "
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"https://github.com/carbon-language/carbon-lang/issues and include the "
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"crash backtrace.\n");
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// Initialize LLVM targets if //common:all_llvm_targets was linked in.
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if (InitializeTargets) {
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InitializeTargets();
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}
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// Printing to stderr should flush stdout. This is most noticeable when stderr
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// is piped to stdout.
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llvm::errs().tie(&llvm::outs());
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}
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InitLLVM::InitializeTargetsFn* InitLLVM::InitializeTargets = nullptr;
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} // namespace Carbon
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