Generalize abort's inline_tgkill, use it in fdsan.
Convert abort's inline_tgkill to do the equivalent of
pthread_sigqueue(pthread_self(), ...), so that we can use it in fdsan
as well.
Test: bionic-unit-tests
Test: debuggerd_test32
Test: debuggerd_test64
Change-Id: I92a7b84e2f00ce021b4043ed8a3bd8683d77fe9c
diff --git a/libc/private/bionic_inline_raise.h b/libc/private/bionic_inline_raise.h
new file mode 100644
index 0000000..7223b4e
--- /dev/null
+++ b/libc/private/bionic_inline_raise.h
@@ -0,0 +1,67 @@
+/*
+ * 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
+}
+