| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include <sys/cdefs.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| // An inline version of pthread_sigqueue(pthread_self(), ...), to reduce the number of |
| // uninteresting stack frames at the top of a crash. |
| static inline __always_inline void inline_raise(int sig, void* value = nullptr) { |
| // Protect ourselves against stale cached PID/TID values by fetching them via syscall. |
| // http://b/37769298 |
| pid_t pid = syscall(__NR_getpid); |
| pid_t tid = syscall(__NR_gettid); |
| siginfo_t info = {}; |
| info.si_code = SI_QUEUE; |
| info.si_pid = pid; |
| info.si_uid = getuid(); |
| info.si_value.sival_ptr = value; |
| |
| #if defined(__arm__) |
| register long r0 __asm__("r0") = pid; |
| register long r1 __asm__("r1") = tid; |
| register long r2 __asm__("r2") = sig; |
| register long r3 __asm__("r3") = reinterpret_cast<long>(&info); |
| register long r7 __asm__("r7") = __NR_rt_tgsigqueueinfo; |
| __asm__("swi #0" : "=r"(r0) : "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r7) : "memory"); |
| #elif defined(__aarch64__) |
| register long x0 __asm__("x0") = pid; |
| register long x1 __asm__("x1") = tid; |
| register long x2 __asm__("x2") = sig; |
| register long x3 __asm__("x3") = reinterpret_cast<long>(&info); |
| register long x8 __asm__("x8") = __NR_rt_tgsigqueueinfo; |
| __asm__("svc #0" : "=r"(x0) : "r"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x8) : "memory"); |
| #else |
| syscall(__NR_rt_tgsigqueueinfo, pid, tid, sig, &info); |
| #endif |
| } |
| |