xref: /aosp_15_r20/external/llvm-libc/src/stdlib/linux/abort.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)
1  //===-- Implementation of abort -------------------------------------------===//
2  //
3  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4  // See https://llvm.org/LICENSE.txt for license information.
5  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6  //
7  //===----------------------------------------------------------------------===//
8  
9  #include "src/__support/common.h"
10  #include "src/__support/macros/config.h"
11  #include "src/signal/raise.h"
12  #include "src/stdlib/_Exit.h"
13  
14  #include "src/stdlib/abort.h"
15  
16  namespace LIBC_NAMESPACE_DECL {
17  
18  LLVM_LIBC_FUNCTION(void, abort, ()) {
19    // TODO: When sigprocmask and sigaction land:
20    // Unblock SIGABRT, raise it, if it was ignored or the handler returned,
21    // change its action to SIG_DFL, raise it again.
22    // TODO: When C11 mutexes land:
23    // Acquire recursive mutex (in case the current signal handler for SIGABRT
24    // itself calls abort we don't want to deadlock on the same thread trying
25    // to acquire it's own mutex.)
26    LIBC_NAMESPACE::raise(SIGABRT);
27    LIBC_NAMESPACE::raise(SIGKILL);
28    LIBC_NAMESPACE::_Exit(127);
29  }
30  
31  } // namespace LIBC_NAMESPACE_DECL
32