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Richard SmithandJon Ross-Perkins
58fba078ee
`toolchain/autoupdate_testdata.py --allow-check-fail` can now be used to perform an autoupdate even if some `CARBON_CHECK`s are failing. What this does will depend on how the toolchain behaves after the `CHECK` failure, and of course there's no guarantees there, but this can be useful if it's easier to debug the `CHECK` failure by looking at the produced SemIR. Internally, this uses `bazel build --config=non-fatal-checks`, which in turn specifies a `--per_file_copt` for `check_internal.cpp`. The intent here is that the rebuild required to enable or disable this mode is as small as reasonably possible. This mode is not compatible with `-c opt`, as it's important that check failure calls are `[[noreturn]]` in `-c opt` mode. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
47 lines
1.7 KiB
C++
47 lines
1.7 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/check_internal.h"
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#include "common/ostream.h"
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#include "llvm/Support/Signals.h"
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namespace Carbon::Internal {
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auto CheckFailImpl(const char* kind, const char* file, int line,
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const char* condition_str, llvm::StringRef extra_message)
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-> void {
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// Render the final check string here.
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std::string message = llvm::formatv(
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"{0} failure at {1}:{2}{3}{4}{5}{6}\n", kind, file, line,
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llvm::StringRef(condition_str).empty() ? "" : ": ", condition_str,
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extra_message.empty() ? "" : ": ", extra_message);
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// This macro is defined by `--config=non-fatal-checks`.
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#ifdef CARBON_NON_FATAL_CHECKS
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#ifdef NDEBUG
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#error "--config=non-fatal-checks is incompatible with -c opt"
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#endif
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// TODO: It'd be nice to print the LLVM PrettyStackTrace, but LLVM doesn't
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// expose functionality to do so.
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llvm::sys::PrintStackTrace(llvm::errs());
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llvm::errs() << message;
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#else
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// Register another signal handler to print the message. This is because we
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// want it at the bottom of output, after LLVM's builtin stack output, rather
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// than the top.
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llvm::sys::AddSignalHandler(
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[](void* str) { llvm::errs() << reinterpret_cast<char*>(str); },
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const_cast<char*>(message.c_str()));
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// It's useful to exit the program with `std::abort()` for integration with
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// debuggers and other tools. We also assume LLVM's exit handling is
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// installed, which will stack trace on `std::abort()`.
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std::abort();
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#endif
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}
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} // namespace Carbon::Internal
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