0580563299
## Purpose This patch is one in a series of code-mods that annotate LLVM’s public interface for export. This patch annotates the `llvm-c` interface with a new `LLVM_C_ABI` annotation, which behaves like the `LLVM_ABI`. This annotation currently has no meaningful impact on the LLVM build; however, it is a prerequisite to support an LLVM Windows DLL (shared library) build. ## Overview 1. Add a new `llvm-c/Visibility.h` header file that defines a new `LLVM_C_ABI` macro. The macro resolves to the proper DLL export/import annotation on Windows and a "default" visibility annotation elsewhere. 2. Add a new `LLVM_ENABLE_LLVM_C_EXPORT_ANNOTATIONS` `#cmakedefine` that is used to gate the definition of `LLVM_C_ABI`. 3. Remove the existing `LLVM_C_ABI` definition from `llvm/Support/Compiler.h`. Update the small number of `LLVM_C_ABI` references to get it from the new `llvm-c/Visibility.h` header. 4. Code-mod annotate the public `llvm-c` interface using the [Interface Definition Scanner (IDS)](https://github.com/compnerd/ids) tool. 5. Format the changes with `clang-format`. ## Background This effort is tracked in #109483. Additional context is provided in [this discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307), and documentation for `LLVM_ABI` and related annotations is found in the LLVM repo [here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst). ## Validation Local builds and tests to validate cross-platform compatibility. This included llvm, clang, and lldb on the following configurations: - Windows with MSVC - Windows with Clang - Linux with GCC - Linux with Clang - Darwin with Clang
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*===-- llvm-c/ErrorHandling.h - Error Handling C Interface -------*- C -*-===*\
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|* *|
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|* Part of the LLVM Project, under the Apache License v2.0 with LLVM *|
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|* Exceptions. *|
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|* See https://llvm.org/LICENSE.txt for license information. *|
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|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception *|
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|* *|
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|*===----------------------------------------------------------------------===*|
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|* *|
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|* This file defines the C interface to LLVM's error handling mechanism. *|
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|* *|
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\*===----------------------------------------------------------------------===*/
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#ifndef LLVM_C_ERRORHANDLING_H
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#define LLVM_C_ERRORHANDLING_H
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#include "llvm-c/ExternC.h"
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#include "llvm-c/Visibility.h"
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LLVM_C_EXTERN_C_BEGIN
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/**
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* @addtogroup LLVMCError
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*
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* @{
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*/
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typedef void (*LLVMFatalErrorHandler)(const char *Reason);
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/**
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* Install a fatal error handler. By default, if LLVM detects a fatal error, it
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* will call exit(1). This may not be appropriate in many contexts. For example,
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* doing exit(1) will bypass many crash reporting/tracing system tools. This
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* function allows you to install a callback that will be invoked prior to the
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* call to exit(1).
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*/
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LLVM_C_ABI void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler);
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/**
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* Reset the fatal error handler. This resets LLVM's fatal error handling
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* behavior to the default.
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*/
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LLVM_C_ABI void LLVMResetFatalErrorHandler(void);
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/**
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* Enable LLVM's built-in stack trace code. This intercepts the OS's crash
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* signals and prints which component of LLVM you were in at the time if the
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* crash.
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*/
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LLVM_C_ABI void LLVMEnablePrettyStackTrace(void);
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/**
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* @}
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*/
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LLVM_C_EXTERN_C_END
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#endif
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