Merge "AArch64: Port debuggerd"

7 files changed, 220 insertions, 7 deletions

diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk
index 8c1c3d8..189bfda 100644
--- a/debuggerd/Android.mk
+++ b/debuggerd/Android.mk
@@ -1,7 +1,5 @@
 # Copyright 2005 The Android Open Source Project
 
-ifneq ($(filter arm mips x86 x86_64,$(TARGET_ARCH)),)
-
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
@@ -60,12 +58,10 @@ ifeq ($(ARCH_ARM_HAVE_VFP_D32),true)
 LOCAL_CFLAGS += -DWITH_VFP_D32
 endif # ARCH_ARM_HAVE_VFP_D32
 
-LOCAL_SRC_FILES := vfp-crasher.c vfp.S
+LOCAL_SRC_FILES := vfp-crasher.c $(TARGET_ARCH)/vfp.S
 LOCAL_MODULE := vfp-crasher
 LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
 LOCAL_MODULE_TAGS := optional
 LOCAL_SHARED_LIBRARIES := libcutils liblog libc
 include $(BUILD_EXECUTABLE)
 endif # ARCH_ARM_HAVE_VFP == true
-
-endif # arm or x86 in TARGET_ARCH
diff --git a/debuggerd/vfp.S b/debuggerd/arm/vfp.S
index 9744f6f..9744f6f 100644
--- a/debuggerd/vfp.S
+++ b/debuggerd/arm/vfp.S
diff --git a/debuggerd/arm64/crashglue.S b/debuggerd/arm64/crashglue.S
new file mode 100644
index 0000000..b06b67c
--- /dev/null
+++ b/debuggerd/arm64/crashglue.S
@@ -0,0 +1,47 @@
+.globl crash1
+.type crash1, %function
+.globl crashnostack
+.type crashnostack, %function
+
+crash1:
+	ldr x0, =0xa5a50000
+	ldr x1, =0xa5a50001
+	ldr x2, =0xa5a50002
+	ldr x3, =0xa5a50003
+	ldr x4, =0xa5a50004
+	ldr x5, =0xa5a50005
+	ldr x6, =0xa5a50006
+	ldr x7, =0xa5a50007
+	ldr x8, =0xa5a50008
+	ldr x9, =0xa5a50009
+	ldr x10, =0xa5a50010
+	ldr x11, =0xa5a50011
+	ldr x12, =0xa5a50012
+	ldr x13, =0xa5a50013
+	ldr x14, =0xa5a50014
+	ldr x15, =0xa5a50015
+	ldr x16, =0xa5a50016
+	ldr x17, =0xa5a50017
+	ldr x18, =0xa5a50018
+	ldr x19, =0xa5a50019
+	ldr x20, =0xa5a50020
+	ldr x21, =0xa5a50021
+	ldr x22, =0xa5a50022
+	ldr x23, =0xa5a50023
+	ldr x24, =0xa5a50024
+	ldr x25, =0xa5a50025
+	ldr x26, =0xa5a50026
+	ldr x27, =0xa5a50027
+	ldr x28, =0xa5a50028
+	ldr x29, =0xa5a50029
+
+	mov x30, xzr
+	ldr x30, [x30]
+	b .
+
+
+crashnostack:
+	mov x0, xzr
+	add sp, x0, xzr
+	ldr x0, [x0]
+	b .
diff --git a/debuggerd/arm64/machine.cpp b/debuggerd/arm64/machine.cpp
new file mode 100644
index 0000000..7159228
--- /dev/null
+++ b/debuggerd/arm64/machine.cpp
@@ -0,0 +1,123 @@
+/*
+ *
+ * Copyright 2014, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <sys/user.h>
+#include <sys/uio.h>
+#include <linux/elf.h>
+
+#include "../utility.h"
+#include "../machine.h"
+
+/* enable to dump memory pointed to by every register */
+#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
+
+/*
+ * If configured to do so, dump memory around *all* registers
+ * for the crashing thread.
+ */
+void dump_memory_and_code(log_t* log, pid_t tid, int scope_flags) {
+    struct user_pt_regs regs;
+    struct iovec io;
+    io.iov_base = &regs;
+    io.iov_len = sizeof(regs);
+
+    if (ptrace(PTRACE_GETREGSET, tid, (void*)NT_PRSTATUS, &io) == -1) {
+        _LOG(log, scope_flags, "%s: ptrace failed to get registers: %s\n",
+             __func__, strerror(errno));
+        return;
+    }
+
+    if (IS_AT_FAULT(scope_flags) && DUMP_MEMORY_FOR_ALL_REGISTERS) {
+        for (int reg = 0; reg < 31; reg++) {
+            uintptr_t addr = regs.regs[reg];
+
+            /*
+             * Don't bother if it looks like a small int or ~= null, or if
+             * it's in the kernel area.
+             */
+            if (addr < 4096 || addr >= (1UL<<63)) {
+                continue;
+            }
+
+            _LOG(log, scope_flags | SCOPE_SENSITIVE, "\nmemory near x%d:\n", reg);
+            dump_memory(log, tid, addr, scope_flags | SCOPE_SENSITIVE);
+        }
+    }
+
+    _LOG(log, scope_flags, "\ncode around pc:\n");
+    dump_memory(log, tid, (uintptr_t)regs.pc, scope_flags);
+
+    if (regs.pc != regs.sp) {
+        _LOG(log, scope_flags, "\ncode around sp:\n");
+        dump_memory(log, tid, (uintptr_t)regs.sp, scope_flags);
+    }
+}
+
+void dump_registers(log_t* log, pid_t tid, int scope_flags)
+{
+  struct user_pt_regs r;
+  struct iovec io;
+  io.iov_base = &r;
+  io.iov_len = sizeof(r);
+
+  bool only_in_tombstone = !IS_AT_FAULT(scope_flags);
+
+  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRSTATUS, (void*) &io) == -1) {
+    _LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
+    return;
+  }
+
+  for (int i = 0; i < 28; i += 4) {
+    _LOG(log, scope_flags, "    x%-2d  %016lx  x%-2d  %016lx  x%-2d  %016lx  x%-2d  %016lx\n",
+         i, (uint64_t)r.regs[i],
+         i+1, (uint64_t)r.regs[i+1],
+         i+2, (uint64_t)r.regs[i+2],
+         i+3, (uint64_t)r.regs[i+3]);
+  }
+
+  _LOG(log, scope_flags, "    x28  %016lx  x29  %016lx  x30  %016lx\n",
+       (uint64_t)r.regs[28], (uint64_t)r.regs[29], (uint64_t)r.regs[30]);
+
+  _LOG(log, scope_flags, "    sp   %016lx  pc   %016lx\n",
+       (uint64_t)r.sp, (uint64_t)r.pc);
+
+
+  struct user_fpsimd_state f;
+  io.iov_base = &f;
+  io.iov_len = sizeof(f);
+
+  if (ptrace(PTRACE_GETREGSET, tid, (void*) NT_PRFPREG, (void*) &io) == -1) {
+    _LOG(log, scope_flags, "ptrace error: %s\n", strerror(errno));
+    return;
+  }
+
+  for (int i = 0; i < 32; i += 4) {
+    _LOG(log, scope_flags, "    v%-2d  %016lx  v%-2d  %016lx  v%-2d  %016lx  v%-2d  %016lx\n",
+         i, (uint64_t)f.vregs[i],
+         i+1, (uint64_t)f.vregs[i+1],
+         i+2, (uint64_t)f.vregs[i+2],
+         i+3, (uint64_t)f.vregs[i+3]);
+  }
+}
diff --git a/debuggerd/arm64/vfp.S b/debuggerd/arm64/vfp.S
new file mode 100644
index 0000000..bf12c22
--- /dev/null
+++ b/debuggerd/arm64/vfp.S
@@ -0,0 +1,42 @@
+    .text
+    .align 2
+    .global crash
+    .type crash, %function
+crash:
+    fmov   d0, XZR
+    fmov   d1, 1.0
+    fmov   d2, 2.0
+    fmov   d3, 3.0
+    fmov   d4, 4.0
+    fmov   d5, 5.0
+    fmov   d6, 6.0
+    fmov   d7, 7.0
+    fmov   d8, 8.0
+    fmov   d9, 9.0
+    fmov   d10, 10.0
+    fmov   d11, 11.0
+    fmov   d12, 12.0
+    fmov   d13, 13.0
+    fmov   d14, 14.0
+    fmov   d15, 15.0
+    fmov   d16, 16.0
+    fmov   d17, 17.0
+    fmov   d18, 18.0
+    fmov   d19, 19.0
+    fmov   d20, 20.0
+    fmov   d21, 21.0
+    fmov   d22, 22.0
+    fmov   d23, 23.0
+    fmov   d24, 24.0
+    fmov   d25, 25.0
+    fmov   d26, 26.0
+    fmov   d27, 27.0
+    fmov   d28, 28.0
+    fmov   d29, 29.0
+    fmov   d30, 30.0
+    fmov   d31, 31.0
+
+    mov       x0, xzr
+    str       x0, [x0]
+    br        x30
+
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index de8ba9d..c39aaf6 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -205,7 +205,8 @@ static int read_request(int fd, debugger_request_t* out_request) {
     return -1;
   }
   if (status == sizeof(debugger_msg_t)) {
-    XLOG("crash request of size %d abort_msg_address=%#08x\n", status, msg.abort_msg_address);
+    XLOG("crash request of size %d abort_msg_address=0x%" PRIPTR "\n",
+         status, msg.abort_msg_address);
   } else {
     LOG("invalid crash request of size %d (from pid=%d uid=%d)\n", status, cr.pid, cr.uid);
     return -1;
diff --git a/debuggerd/tombstone.cpp b/debuggerd/tombstone.cpp
index b66890e..5acf16d 100755
--- a/debuggerd/tombstone.cpp
+++ b/debuggerd/tombstone.cpp
@@ -360,7 +360,7 @@ static void dump_nearby_maps(BacktraceMap* map, log_t* log, pid_t tid, int scope
     return;
   }
 
-  _LOG(log, scope_flags, "\nmemory map around fault addr %" PRIxPTR ":\n",
+  _LOG(log, scope_flags, "\nmemory map around fault addr %" PRIPTR ":\n",
        reinterpret_cast<uintptr_t>(si.si_addr));
 
   // Search for a match, or for a hole where the match would be.  The list
@@ -653,7 +653,11 @@ static bool dump_crash(log_t* log, pid_t pid, pid_t tid, int signal, uintptr_t a
 //
 // Returns the path of the tombstone file, allocated using malloc().  Caller must free() it.
 static char* find_and_open_tombstone(int* fd) {
+#ifdef __aarch64__
+  long mtime = LONG_MAX;
+#else
   unsigned long mtime = ULONG_MAX;
+#endif
   struct stat sb;
 
   // XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought