Use libcorkscrew in debuggerd.
Change-Id: I5e3645a39d96c808f87075b49111d0262a19a0c8
diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk
index 6cfe79b..f127363 100644
--- a/debuggerd/Android.mk
+++ b/debuggerd/Android.mk
@@ -5,12 +5,9 @@
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
-LOCAL_SRC_FILES:= debuggerd.c utility.c getevent.c $(TARGET_ARCH)/machine.c $(TARGET_ARCH)/unwind.c symbol_table.c
-ifeq ($(TARGET_ARCH),arm)
-LOCAL_SRC_FILES += $(TARGET_ARCH)/pr-support.c
-endif
+LOCAL_SRC_FILES:= debuggerd.c utility.c getevent.c $(TARGET_ARCH)/machine.c
-LOCAL_CFLAGS := -Wall
+LOCAL_CFLAGS := -Wall -Werror -std=gnu99
LOCAL_MODULE := debuggerd
ifeq ($(ARCH_ARM_HAVE_VFP),true)
@@ -20,7 +17,7 @@
LOCAL_CFLAGS += -DWITH_VFP_D32
endif # ARCH_ARM_HAVE_VFP_D32
-LOCAL_STATIC_LIBRARIES := libcutils libc
+LOCAL_SHARED_LIBRARIES := libcutils libc libcorkscrew
include $(BUILD_EXECUTABLE)
diff --git a/debuggerd/arm/machine.c b/debuggerd/arm/machine.c
index 5055444..891b1ef 100644
--- a/debuggerd/arm/machine.c
+++ b/debuggerd/arm/machine.c
@@ -34,10 +34,11 @@
#include <linux/input.h>
#include <linux/user.h>
-#include "utility.h"
+#include "../utility.h"
+#include "../machine.h"
/* enable to dump memory pointed to by every register */
-#define DUMP_MEM_FOR_ALL_REGS 1
+#define DUMP_MEMORY_FOR_ALL_REGISTERS 1
#ifdef WITH_VFP
#ifdef WITH_VFP_D32
@@ -47,172 +48,22 @@
#endif
#endif
-/* Main entry point to get the backtrace from the crashing process */
-extern int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map,
- unsigned int sp_list[],
- int *frame0_pc_sane,
- bool at_fault);
-
/*
- * If this isn't clearly a null pointer dereference, dump the
- * /proc/maps entries near the fault address.
- *
- * This only makes sense to do on the thread that crashed.
+ * If configured to do so, dump memory around *all* registers
+ * for the crashing thread.
*/
-static void show_nearby_maps(int tfd, int pid, mapinfo *map)
-{
- siginfo_t si;
-
- memset(&si, 0, sizeof(si));
- if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si)) {
- _LOG(tfd, false, "cannot get siginfo for %d: %s\n",
- pid, strerror(errno));
+static void dump_memory_and_code(int tfd, pid_t tid, bool at_fault) {
+ struct pt_regs regs;
+ if(ptrace(PTRACE_GETREGS, tid, 0, ®s)) {
return;
}
- if (!signal_has_address(si.si_signo))
- return;
- uintptr_t addr = (uintptr_t) si.si_addr;
- addr &= ~0xfff; /* round to 4K page boundary */
- if (addr == 0) /* null-pointer deref */
- return;
+ if (at_fault && DUMP_MEMORY_FOR_ALL_REGISTERS) {
+ static const char REG_NAMES[] = "r0r1r2r3r4r5r6r7r8r9slfpipsp";
- _LOG(tfd, false, "\nmemory map around addr %08x:\n", si.si_addr);
-
- /*
- * Search for a match, or for a hole where the match would be. The list
- * is backward from the file content, so it starts at high addresses.
- */
- bool found = false;
- mapinfo *next = NULL;
- mapinfo *prev = NULL;
- while (map != NULL) {
- if (addr >= map->start && addr < map->end) {
- found = true;
- next = map->next;
- break;
- } else if (addr >= map->end) {
- /* map would be between "prev" and this entry */
- next = map;
- map = NULL;
- break;
- }
-
- prev = map;
- map = map->next;
- }
-
- /*
- * Show "next" then "match" then "prev" so that the addresses appear in
- * ascending order (like /proc/pid/maps).
- */
- if (next != NULL) {
- _LOG(tfd, false, "%08x-%08x %s\n", next->start, next->end, next->name);
- } else {
- _LOG(tfd, false, "(no map below)\n");
- }
- if (map != NULL) {
- _LOG(tfd, false, "%08x-%08x %s\n", map->start, map->end, map->name);
- } else {
- _LOG(tfd, false, "(no map for address)\n");
- }
- if (prev != NULL) {
- _LOG(tfd, false, "%08x-%08x %s\n", prev->start, prev->end, prev->name);
- } else {
- _LOG(tfd, false, "(no map above)\n");
- }
-}
-
-/*
- * Dumps a few bytes of memory, starting a bit before and ending a bit
- * after the specified address.
- */
-static void dump_memory(int tfd, int pid, uintptr_t addr,
- bool only_in_tombstone)
-{
- char code_buffer[64]; /* actual 8+1+((8+1)*4) + 1 == 45 */
- char ascii_buffer[32]; /* actual 16 + 1 == 17 */
- uintptr_t p, end;
-
- p = addr & ~3;
- p -= 32;
- if (p > addr) {
- /* catch underflow */
- p = 0;
- }
- end = p + 80;
- /* catch overflow; 'end - p' has to be multiples of 16 */
- while (end < p)
- end -= 16;
-
- /* Dump the code around PC as:
- * addr contents ascii
- * 00008d34 ef000000 e8bd0090 e1b00000 512fff1e ............../Q
- * 00008d44 ea00b1f9 e92d0090 e3a070fc ef000000 ......-..p......
- */
- while (p < end) {
- char* asc_out = ascii_buffer;
-
- sprintf(code_buffer, "%08x ", p);
-
- int i;
- for (i = 0; i < 4; i++) {
- /*
- * If we see (data == -1 && errno != 0), we know that the ptrace
- * call failed, probably because we're dumping memory in an
- * unmapped or inaccessible page. I don't know if there's
- * value in making that explicit in the output -- it likely
- * just complicates parsing and clarifies nothing for the
- * enlightened reader.
- */
- long data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
- sprintf(code_buffer + strlen(code_buffer), "%08lx ", data);
-
- int j;
- for (j = 0; j < 4; j++) {
- /*
- * Our isprint() allows high-ASCII characters that display
- * differently (often badly) in different viewers, so we
- * just use a simpler test.
- */
- char val = (data >> (j*8)) & 0xff;
- if (val >= 0x20 && val < 0x7f) {
- *asc_out++ = val;
- } else {
- *asc_out++ = '.';
- }
- }
- p += 4;
- }
- *asc_out = '\0';
- _LOG(tfd, only_in_tombstone, "%s %s\n", code_buffer, ascii_buffer);
- }
-
-}
-
-void dump_stack_and_code(int tfd, int pid, mapinfo *map,
- int unwind_depth, unsigned int sp_list[],
- bool at_fault)
-{
- struct pt_regs r;
- int sp_depth;
- bool only_in_tombstone = !at_fault;
-
- if(ptrace(PTRACE_GETREGS, pid, 0, &r)) return;
-
- if (DUMP_MEM_FOR_ALL_REGS && at_fault) {
- /*
- * If configured to do so, dump memory around *all* registers
- * for the crashing thread.
- *
- * TODO: remove duplicates.
- */
- static const char REG_NAMES[] = "R0R1R2R3R4R5R6R7R8R9SLFPIPSPLRPC";
-
- int reg;
- for (reg = 0; reg < 16; reg++) {
+ for (int reg = 0; reg < 14; reg++) {
/* this may not be a valid way to access, but it'll do for now */
- uintptr_t addr = r.uregs[reg];
+ uintptr_t addr = regs.uregs[reg];
/*
* Don't bother if it looks like a small int or ~= null, or if
@@ -222,152 +73,65 @@
continue;
}
- _LOG(tfd, only_in_tombstone, "\nmem near %.2s:\n",
- ®_NAMES[reg*2]);
- dump_memory(tfd, pid, addr, false);
- }
- } else {
- unsigned int pc, lr;
- pc = r.ARM_pc;
- lr = r.ARM_lr;
-
- _LOG(tfd, only_in_tombstone, "\ncode around pc:\n");
- dump_memory(tfd, pid, (uintptr_t) pc, only_in_tombstone);
-
- if (lr != pc) {
- _LOG(tfd, only_in_tombstone, "\ncode around lr:\n");
- dump_memory(tfd, pid, (uintptr_t) lr, only_in_tombstone);
+ _LOG(tfd, false, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]);
+ dump_memory(tfd, tid, addr, at_fault);
}
}
- if (at_fault) {
- show_nearby_maps(tfd, pid, map);
- }
+ _LOG(tfd, !at_fault, "\ncode around pc:\n");
+ dump_memory(tfd, tid, (uintptr_t)regs.ARM_pc, at_fault);
- unsigned int p, end;
- unsigned int sp = r.ARM_sp;
-
- p = sp - 64;
- if (p > sp)
- p = 0;
- p &= ~3;
- if (unwind_depth != 0) {
- if (unwind_depth < STACK_CONTENT_DEPTH) {
- end = sp_list[unwind_depth-1];
- }
- else {
- end = sp_list[STACK_CONTENT_DEPTH-1];
- }
- }
- else {
- end = p + 256;
- /* 'end - p' has to be multiples of 4 */
- if (end < p)
- end = ~7;
- }
-
- _LOG(tfd, only_in_tombstone, "\nstack:\n");
-
- /* If the crash is due to PC == 0, there will be two frames that
- * have identical SP value.
- */
- if (sp_list[0] == sp_list[1]) {
- sp_depth = 1;
- }
- else {
- sp_depth = 0;
- }
-
- while (p <= end) {
- char *prompt;
- char level[16];
- long data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
- if (p == sp_list[sp_depth]) {
- sprintf(level, "#%02d", sp_depth++);
- prompt = level;
- }
- else {
- prompt = " ";
- }
-
- /* Print the stack content in the log for the first 3 frames. For the
- * rest only print them in the tombstone file.
- */
- _LOG(tfd, (sp_depth > 2) || only_in_tombstone,
- "%s %08x %08x %s\n", prompt, p, data,
- map_to_name(map, data, ""));
- p += 4;
- }
- /* print another 64-byte of stack data after the last frame */
-
- end = p+64;
- /* 'end - p' has to be multiples of 4 */
- if (end < p)
- end = ~7;
-
- while (p <= end) {
- long data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
- _LOG(tfd, (sp_depth > 2) || only_in_tombstone,
- " %08x %08x %s\n", p, data,
- map_to_name(map, data, ""));
- p += 4;
+ if (regs.ARM_pc != regs.ARM_lr) {
+ _LOG(tfd, !at_fault, "\ncode around lr:\n");
+ dump_memory(tfd, tid, (uintptr_t)regs.ARM_lr, at_fault);
}
}
-void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level,
- bool at_fault)
-{
- struct pt_regs r;
-
- if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
- _LOG(tfd, !at_fault, "tid %d not responding!\n", pid);
- return;
- }
-
- if (unwound_level == 0) {
- _LOG(tfd, !at_fault, " #%02d pc %08x %s\n", 0, r.ARM_pc,
- map_to_name(map, r.ARM_pc, "<unknown>"));
- }
- _LOG(tfd, !at_fault, " #%02d lr %08x %s\n", 1, r.ARM_lr,
- map_to_name(map, r.ARM_lr, "<unknown>"));
-}
-
-void dump_registers(int tfd, int pid, bool at_fault)
+void dump_registers(ptrace_context_t* context __attribute((unused)),
+ int tfd, pid_t tid, bool at_fault)
{
struct pt_regs r;
bool only_in_tombstone = !at_fault;
- if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
- _LOG(tfd, only_in_tombstone,
- "cannot get registers: %s\n", strerror(errno));
+ if(ptrace(PTRACE_GETREGS, tid, 0, &r)) {
+ _LOG(tfd, only_in_tombstone, "cannot get registers: %s\n", strerror(errno));
return;
}
- _LOG(tfd, only_in_tombstone, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
- r.ARM_r0, r.ARM_r1, r.ARM_r2, r.ARM_r3);
- _LOG(tfd, only_in_tombstone, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
- r.ARM_r4, r.ARM_r5, r.ARM_r6, r.ARM_r7);
- _LOG(tfd, only_in_tombstone, " r8 %08x r9 %08x 10 %08x fp %08x\n",
- r.ARM_r8, r.ARM_r9, r.ARM_r10, r.ARM_fp);
- _LOG(tfd, only_in_tombstone,
- " ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
- r.ARM_ip, r.ARM_sp, r.ARM_lr, r.ARM_pc, r.ARM_cpsr);
+ _LOG(tfd, only_in_tombstone, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
+ (uint32_t)r.ARM_r0, (uint32_t)r.ARM_r1, (uint32_t)r.ARM_r2, (uint32_t)r.ARM_r3);
+ _LOG(tfd, only_in_tombstone, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
+ (uint32_t)r.ARM_r4, (uint32_t)r.ARM_r5, (uint32_t)r.ARM_r6, (uint32_t)r.ARM_r7);
+ _LOG(tfd, only_in_tombstone, " r8 %08x r9 %08x sl %08x fp %08x\n",
+ (uint32_t)r.ARM_r8, (uint32_t)r.ARM_r9, (uint32_t)r.ARM_r10, (uint32_t)r.ARM_fp);
+ _LOG(tfd, only_in_tombstone, " ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
+ (uint32_t)r.ARM_ip, (uint32_t)r.ARM_sp, (uint32_t)r.ARM_lr,
+ (uint32_t)r.ARM_pc, (uint32_t)r.ARM_cpsr);
#ifdef WITH_VFP
struct user_vfp vfp_regs;
int i;
- if(ptrace(PTRACE_GETVFPREGS, pid, 0, &vfp_regs)) {
- _LOG(tfd, only_in_tombstone,
- "cannot get registers: %s\n", strerror(errno));
+ if(ptrace(PTRACE_GETVFPREGS, tid, 0, &vfp_regs)) {
+ _LOG(tfd, only_in_tombstone, "cannot get registers: %s\n", strerror(errno));
return;
}
for (i = 0; i < NUM_VFP_REGS; i += 2) {
- _LOG(tfd, only_in_tombstone,
- " d%-2d %016llx d%-2d %016llx\n",
- i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
+ _LOG(tfd, only_in_tombstone, " d%-2d %016llx d%-2d %016llx\n",
+ i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
}
- _LOG(tfd, only_in_tombstone, " scr %08lx\n\n", vfp_regs.fpscr);
+ _LOG(tfd, only_in_tombstone, " scr %08lx\n\n", vfp_regs.fpscr);
#endif
}
+
+void dump_thread(ptrace_context_t* context, int tfd, pid_t tid, bool at_fault) {
+ dump_registers(context, tfd, tid, at_fault);
+
+ dump_backtrace_and_stack(context, tfd, tid, at_fault);
+
+ if (at_fault) {
+ dump_memory_and_code(tfd, tid, at_fault);
+ dump_nearby_maps(context, tfd, tid);
+ }
+}
diff --git a/debuggerd/arm/pr-support.c b/debuggerd/arm/pr-support.c
deleted file mode 100644
index 358d9b7..0000000
--- a/debuggerd/arm/pr-support.c
+++ /dev/null
@@ -1,345 +0,0 @@
-/* ARM EABI compliant unwinding routines
- Copyright (C) 2004, 2005 Free Software Foundation, Inc.
- Contributed by Paul Brook
-
- This file is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
-
- In addition to the permissions in the GNU General Public License, the
- Free Software Foundation gives you unlimited permission to link the
- compiled version of this file into combinations with other programs,
- and to distribute those combinations without any restriction coming
- from the use of this file. (The General Public License restrictions
- do apply in other respects; for example, they cover modification of
- the file, and distribution when not linked into a combine
- executable.)
-
- This file is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
-/****************************************************************************
- * The functions here are derived from gcc/config/arm/pr-support.c from the
- * 4.3.x release. The main changes here involve the use of ptrace to retrieve
- * memory/processor states from a remote process.
- ****************************************************************************/
-
-#include <sys/types.h>
-#include <unwind.h>
-
-#include "utility.h"
-
-/* We add a prototype for abort here to avoid creating a dependency on
- target headers. */
-extern void abort (void);
-
-/* Derived from _Unwind_VRS_Pop to use ptrace */
-extern _Unwind_VRS_Result
-unwind_VRS_Pop_with_ptrace (_Unwind_Context *context,
- _Unwind_VRS_RegClass regclass,
- _uw discriminator,
- _Unwind_VRS_DataRepresentation representation,
- pid_t pid);
-
-typedef struct _ZSt9type_info type_info; /* This names C++ type_info type */
-
-/* Misc constants. */
-#define R_IP 12
-#define R_SP 13
-#define R_LR 14
-#define R_PC 15
-
-#define uint32_highbit (((_uw) 1) << 31)
-
-void __attribute__((weak)) __cxa_call_unexpected(_Unwind_Control_Block *ucbp);
-
-/* Unwind descriptors. */
-
-typedef struct
-{
- _uw16 length;
- _uw16 offset;
-} EHT16;
-
-typedef struct
-{
- _uw length;
- _uw offset;
-} EHT32;
-
-/* Personality routine helper functions. */
-
-#define CODE_FINISH (0xb0)
-
-/* Derived from next_unwind_byte to use ptrace */
-/* Return the next byte of unwinding information, or CODE_FINISH if there is
- no data remaining. */
-static inline _uw8
-next_unwind_byte_with_ptrace (__gnu_unwind_state * uws, pid_t pid)
-{
- _uw8 b;
-
- if (uws->bytes_left == 0)
- {
- /* Load another word */
- if (uws->words_left == 0)
- return CODE_FINISH; /* Nothing left. */
- uws->words_left--;
- uws->data = get_remote_word(pid, uws->next);
- uws->next++;
- uws->bytes_left = 3;
- }
- else
- uws->bytes_left--;
-
- /* Extract the most significant byte. */
- b = (uws->data >> 24) & 0xff;
- uws->data <<= 8;
- return b;
-}
-
-/* Execute the unwinding instructions described by UWS. */
-_Unwind_Reason_Code
-unwind_execute_with_ptrace(_Unwind_Context * context, __gnu_unwind_state * uws,
- pid_t pid)
-{
- _uw op;
- int set_pc;
- _uw reg;
-
- set_pc = 0;
- for (;;)
- {
- op = next_unwind_byte_with_ptrace (uws, pid);
- if (op == CODE_FINISH)
- {
- /* If we haven't already set pc then copy it from lr. */
- if (!set_pc)
- {
- _Unwind_VRS_Get (context, _UVRSC_CORE, R_LR, _UVRSD_UINT32,
- ®);
- _Unwind_VRS_Set (context, _UVRSC_CORE, R_PC, _UVRSD_UINT32,
- ®);
- set_pc = 1;
- }
- /* Drop out of the loop. */
- break;
- }
- if ((op & 0x80) == 0)
- {
- /* vsp = vsp +- (imm6 << 2 + 4). */
- _uw offset;
-
- offset = ((op & 0x3f) << 2) + 4;
- _Unwind_VRS_Get (context, _UVRSC_CORE, R_SP, _UVRSD_UINT32, ®);
- if (op & 0x40)
- reg -= offset;
- else
- reg += offset;
- _Unwind_VRS_Set (context, _UVRSC_CORE, R_SP, _UVRSD_UINT32, ®);
- continue;
- }
-
- if ((op & 0xf0) == 0x80)
- {
- op = (op << 8) | next_unwind_byte_with_ptrace (uws, pid);
- if (op == 0x8000)
- {
- /* Refuse to unwind. */
- return _URC_FAILURE;
- }
- /* Pop r4-r15 under mask. */
- op = (op << 4) & 0xfff0;
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_CORE, op, _UVRSD_UINT32,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- if (op & (1 << R_PC))
- set_pc = 1;
- continue;
- }
- if ((op & 0xf0) == 0x90)
- {
- op &= 0xf;
- if (op == 13 || op == 15)
- /* Reserved. */
- return _URC_FAILURE;
- /* vsp = r[nnnn]. */
- _Unwind_VRS_Get (context, _UVRSC_CORE, op, _UVRSD_UINT32, ®);
- _Unwind_VRS_Set (context, _UVRSC_CORE, R_SP, _UVRSD_UINT32, ®);
- continue;
- }
- if ((op & 0xf0) == 0xa0)
- {
- /* Pop r4-r[4+nnn], [lr]. */
- _uw mask;
-
- mask = (0xff0 >> (7 - (op & 7))) & 0xff0;
- if (op & 8)
- mask |= (1 << R_LR);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_CORE, mask, _UVRSD_UINT32,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if ((op & 0xf0) == 0xb0)
- {
- /* op == 0xb0 already handled. */
- if (op == 0xb1)
- {
- op = next_unwind_byte_with_ptrace (uws, pid);
- if (op == 0 || ((op & 0xf0) != 0))
- /* Spare. */
- return _URC_FAILURE;
- /* Pop r0-r4 under mask. */
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_CORE, op,
- _UVRSD_UINT32, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if (op == 0xb2)
- {
- /* vsp = vsp + 0x204 + (uleb128 << 2). */
- int shift;
-
- _Unwind_VRS_Get (context, _UVRSC_CORE, R_SP, _UVRSD_UINT32,
- ®);
- op = next_unwind_byte_with_ptrace (uws, pid);
- shift = 2;
- while (op & 0x80)
- {
- reg += ((op & 0x7f) << shift);
- shift += 7;
- op = next_unwind_byte_with_ptrace (uws, pid);
- }
- reg += ((op & 0x7f) << shift) + 0x204;
- _Unwind_VRS_Set (context, _UVRSC_CORE, R_SP, _UVRSD_UINT32,
- ®);
- continue;
- }
- if (op == 0xb3)
- {
- /* Pop VFP registers with fldmx. */
- op = next_unwind_byte_with_ptrace (uws, pid);
- op = ((op & 0xf0) << 12) | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_VFP, op, _UVRSD_VFPX,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if ((op & 0xfc) == 0xb4)
- {
- /* Pop FPA E[4]-E[4+nn]. */
- op = 0x40000 | ((op & 3) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_FPA, op, _UVRSD_FPAX,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- /* op & 0xf8 == 0xb8. */
- /* Pop VFP D[8]-D[8+nnn] with fldmx. */
- op = 0x80000 | ((op & 7) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_VFP, op, _UVRSD_VFPX, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if ((op & 0xf0) == 0xc0)
- {
- if (op == 0xc6)
- {
- /* Pop iWMMXt D registers. */
- op = next_unwind_byte_with_ptrace (uws, pid);
- op = ((op & 0xf0) << 12) | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_WMMXD, op,
- _UVRSD_UINT64, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if (op == 0xc7)
- {
- op = next_unwind_byte_with_ptrace (uws, pid);
- if (op == 0 || (op & 0xf0) != 0)
- /* Spare. */
- return _URC_FAILURE;
- /* Pop iWMMXt wCGR{3,2,1,0} under mask. */
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_WMMXC, op,
- _UVRSD_UINT32, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if ((op & 0xf8) == 0xc0)
- {
- /* Pop iWMMXt wR[10]-wR[10+nnn]. */
- op = 0xa0000 | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_WMMXD, op,
- _UVRSD_UINT64, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- if (op == 0xc8)
- {
-#ifndef __VFP_FP__
- /* Pop FPA registers. */
- op = next_unwind_byte_with_ptrace (uws, pid);
- op = ((op & 0xf0) << 12) | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_FPA, op, _UVRSD_FPAX,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
-#else
- /* Pop VFPv3 registers D[16+ssss]-D[16+ssss+cccc] with vldm. */
- op = next_unwind_byte_with_ptrace (uws, pid);
- op = (((op & 0xf0) + 16) << 12) | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_VFP, op,
- _UVRSD_DOUBLE, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
-#endif
- }
- if (op == 0xc9)
- {
- /* Pop VFP registers with fldmd. */
- op = next_unwind_byte_with_ptrace (uws, pid);
- op = ((op & 0xf0) << 12) | ((op & 0xf) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_VFP, op,
- _UVRSD_DOUBLE, pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- /* Spare. */
- return _URC_FAILURE;
- }
- if ((op & 0xf8) == 0xd0)
- {
- /* Pop VFP D[8]-D[8+nnn] with fldmd. */
- op = 0x80000 | ((op & 7) + 1);
- if (unwind_VRS_Pop_with_ptrace (context, _UVRSC_VFP, op, _UVRSD_DOUBLE,
- pid)
- != _UVRSR_OK)
- return _URC_FAILURE;
- continue;
- }
- /* Spare. */
- return _URC_FAILURE;
- }
- return _URC_OK;
-}
diff --git a/debuggerd/arm/unwind.c b/debuggerd/arm/unwind.c
deleted file mode 100644
index d9600b7..0000000
--- a/debuggerd/arm/unwind.c
+++ /dev/null
@@ -1,667 +0,0 @@
-/* ARM EABI compliant unwinding routines.
- Copyright (C) 2004, 2005 Free Software Foundation, Inc.
- Contributed by Paul Brook
-
- This file is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
-
- In addition to the permissions in the GNU General Public License, the
- Free Software Foundation gives you unlimited permission to link the
- compiled version of this file into combinations with other programs,
- and to distribute those combinations without any restriction coming
- from the use of this file. (The General Public License restrictions
- do apply in other respects; for example, they cover modification of
- the file, and distribution when not linked into a combine
- executable.)
-
- This file is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
-/****************************************************************************
- * The functions here are derived from gcc/config/arm/unwind-arm.c from the
- * 4.3.x release. The main changes here involve the use of ptrace to retrieve
- * memory/processor states from a remote process.
- ****************************************************************************/
-
-#include <cutils/logd.h>
-#include <sys/ptrace.h>
-#include <unwind.h>
-#include "utility.h"
-
-#include "symbol_table.h"
-
-typedef struct _ZSt9type_info type_info; /* This names C++ type_info type */
-
-void __attribute__((weak)) __cxa_call_unexpected(_Unwind_Control_Block *ucbp);
-bool __attribute__((weak)) __cxa_begin_cleanup(_Unwind_Control_Block *ucbp);
-bool __attribute__((weak)) __cxa_type_match(_Unwind_Control_Block *ucbp,
- const type_info *rttip,
- bool is_reference,
- void **matched_object);
-
-/* Misc constants. */
-#define R_IP 12
-#define R_SP 13
-#define R_LR 14
-#define R_PC 15
-
-#define EXIDX_CANTUNWIND 1
-#define uint32_highbit (((_uw) 1) << 31)
-
-#define UCB_FORCED_STOP_FN(ucbp) ((ucbp)->unwinder_cache.reserved1)
-#define UCB_PR_ADDR(ucbp) ((ucbp)->unwinder_cache.reserved2)
-#define UCB_SAVED_CALLSITE_ADDR(ucbp) ((ucbp)->unwinder_cache.reserved3)
-#define UCB_FORCED_STOP_ARG(ucbp) ((ucbp)->unwinder_cache.reserved4)
-
-struct core_regs
-{
- _uw r[16];
-};
-
-/* We use normal integer types here to avoid the compiler generating
- coprocessor instructions. */
-struct vfp_regs
-{
- _uw64 d[16];
- _uw pad;
-};
-
-struct vfpv3_regs
-{
- /* Always populated via VSTM, so no need for the "pad" field from
- vfp_regs (which is used to store the format word for FSTMX). */
- _uw64 d[16];
-};
-
-struct fpa_reg
-{
- _uw w[3];
-};
-
-struct fpa_regs
-{
- struct fpa_reg f[8];
-};
-
-struct wmmxd_regs
-{
- _uw64 wd[16];
-};
-
-struct wmmxc_regs
-{
- _uw wc[4];
-};
-
-/* Unwind descriptors. */
-
-typedef struct
-{
- _uw16 length;
- _uw16 offset;
-} EHT16;
-
-typedef struct
-{
- _uw length;
- _uw offset;
-} EHT32;
-
-/* The ABI specifies that the unwind routines may only use core registers,
- except when actually manipulating coprocessor state. This allows
- us to write one implementation that works on all platforms by
- demand-saving coprocessor registers.
-
- During unwinding we hold the coprocessor state in the actual hardware
- registers and allocate demand-save areas for use during phase1
- unwinding. */
-
-typedef struct
-{
- /* The first fields must be the same as a phase2_vrs. */
- _uw demand_save_flags;
- struct core_regs core;
- _uw prev_sp; /* Only valid during forced unwinding. */
- struct vfp_regs vfp;
- struct vfpv3_regs vfp_regs_16_to_31;
- struct fpa_regs fpa;
- struct wmmxd_regs wmmxd;
- struct wmmxc_regs wmmxc;
-} phase1_vrs;
-
-/* This must match the structure created by the assembly wrappers. */
-typedef struct
-{
- _uw demand_save_flags;
- struct core_regs core;
-} phase2_vrs;
-
-
-/* An exception index table entry. */
-
-typedef struct __EIT_entry
-{
- _uw fnoffset;
- _uw content;
-} __EIT_entry;
-
-/* Derived version to use ptrace */
-typedef _Unwind_Reason_Code (*personality_routine_with_ptrace)
- (_Unwind_State,
- _Unwind_Control_Block *,
- _Unwind_Context *,
- pid_t);
-
-/* Derived version to use ptrace */
-/* ABI defined personality routines. */
-static _Unwind_Reason_Code unwind_cpp_pr0_with_ptrace (_Unwind_State,
- _Unwind_Control_Block *, _Unwind_Context *, pid_t);
-static _Unwind_Reason_Code unwind_cpp_pr1_with_ptrace (_Unwind_State,
- _Unwind_Control_Block *, _Unwind_Context *, pid_t);
-static _Unwind_Reason_Code unwind_cpp_pr2_with_ptrace (_Unwind_State,
- _Unwind_Control_Block *, _Unwind_Context *, pid_t);
-
-/* Execute the unwinding instructions described by UWS. */
-extern _Unwind_Reason_Code
-unwind_execute_with_ptrace(_Unwind_Context * context, __gnu_unwind_state * uws,
- pid_t pid);
-
-/* Derived version to use ptrace. Only handles core registers. Disregards
- * FP and others.
- */
-/* ABI defined function to pop registers off the stack. */
-
-_Unwind_VRS_Result unwind_VRS_Pop_with_ptrace (_Unwind_Context *context,
- _Unwind_VRS_RegClass regclass,
- _uw discriminator,
- _Unwind_VRS_DataRepresentation representation,
- pid_t pid)
-{
- phase1_vrs *vrs = (phase1_vrs *) context;
-
- switch (regclass)
- {
- case _UVRSC_CORE:
- {
- _uw *ptr;
- _uw mask;
- int i;
-
- if (representation != _UVRSD_UINT32)
- return _UVRSR_FAILED;
-
- mask = discriminator & 0xffff;
- ptr = (_uw *) vrs->core.r[R_SP];
- /* Pop the requested registers. */
- for (i = 0; i < 16; i++)
- {
- if (mask & (1 << i)) {
- vrs->core.r[i] = get_remote_word(pid, ptr);
- ptr++;
- }
- }
- /* Writeback the stack pointer value if it wasn't restored. */
- if ((mask & (1 << R_SP)) == 0)
- vrs->core.r[R_SP] = (_uw) ptr;
- }
- return _UVRSR_OK;
-
- default:
- return _UVRSR_FAILED;
- }
-}
-
-/* Core unwinding functions. */
-
-/* Calculate the address encoded by a 31-bit self-relative offset at address
- P. */
-static inline _uw
-selfrel_offset31 (const _uw *p, pid_t pid)
-{
- _uw offset = get_remote_word(pid, (void*)p);
-
- //offset = *p;
- /* Sign extend to 32 bits. */
- if (offset & (1 << 30))
- offset |= 1u << 31;
- else
- offset &= ~(1u << 31);
-
- return offset + (_uw) p;
-}
-
-
-/* Perform a binary search for RETURN_ADDRESS in TABLE. The table contains
- NREC entries. */
-
-static const __EIT_entry *
-search_EIT_table (const __EIT_entry * table, int nrec, _uw return_address,
- pid_t pid)
-{
- _uw next_fn;
- _uw this_fn;
- int n, left, right;
-
- if (nrec == 0)
- return (__EIT_entry *) 0;
-
- left = 0;
- right = nrec - 1;
-
- while (1)
- {
- n = (left + right) / 2;
- this_fn = selfrel_offset31 (&table[n].fnoffset, pid);
- if (n != nrec - 1)
- next_fn = selfrel_offset31 (&table[n + 1].fnoffset, pid) - 1;
- else
- next_fn = (_uw)0 - 1;
-
- if (return_address < this_fn)
- {
- if (n == left)
- return (__EIT_entry *) 0;
- right = n - 1;
- }
- else if (return_address <= next_fn)
- return &table[n];
- else
- left = n + 1;
- }
-}
-
-/* Find the exception index table eintry for the given address. */
-static const __EIT_entry*
-get_eitp(_uw return_address, pid_t pid, mapinfo *map, mapinfo **containing_map)
-{
- const __EIT_entry *eitp = NULL;
- int nrec;
- mapinfo *mi;
-
- /* The return address is the address of the instruction following the
- call instruction (plus one in thumb mode). If this was the last
- instruction in the function the address will lie in the following
- function. Subtract 2 from the address so that it points within the call
- instruction itself. */
- if (return_address >= 2)
- return_address -= 2;
-
- for (mi = map; mi != NULL; mi = mi->next) {
- if (return_address >= mi->start && return_address <= mi->end) break;
- }
-
- if (mi) {
- if (containing_map) *containing_map = mi;
- eitp = (__EIT_entry *) mi->exidx_start;
- nrec = (mi->exidx_end - mi->exidx_start)/sizeof(__EIT_entry);
- eitp = search_EIT_table (eitp, nrec, return_address, pid);
- }
- return eitp;
-}
-
-/* Find the exception index table eintry for the given address.
- Fill in the relevant fields of the UCB.
- Returns _URC_FAILURE if an error occurred, _URC_OK on success. */
-
-static _Unwind_Reason_Code
-get_eit_entry (_Unwind_Control_Block *ucbp, _uw return_address, pid_t pid,
- mapinfo *map, mapinfo **containing_map)
-{
- const __EIT_entry *eitp;
-
- eitp = get_eitp(return_address, pid, map, containing_map);
-
- if (!eitp)
- {
- UCB_PR_ADDR (ucbp) = 0;
- return _URC_FAILURE;
- }
- ucbp->pr_cache.fnstart = selfrel_offset31 (&eitp->fnoffset, pid);
-
- _uw eitp_content = get_remote_word(pid, (void *)&eitp->content);
-
- /* Can this frame be unwound at all? */
- if (eitp_content == EXIDX_CANTUNWIND)
- {
- UCB_PR_ADDR (ucbp) = 0;
- return _URC_END_OF_STACK;
- }
-
- /* Obtain the address of the "real" __EHT_Header word. */
-
- if (eitp_content & uint32_highbit)
- {
- /* It is immediate data. */
- ucbp->pr_cache.ehtp = (_Unwind_EHT_Header *)&eitp->content;
- ucbp->pr_cache.additional = 1;
- }
- else
- {
- /* The low 31 bits of the content field are a self-relative
- offset to an _Unwind_EHT_Entry structure. */
- ucbp->pr_cache.ehtp =
- (_Unwind_EHT_Header *) selfrel_offset31 (&eitp->content, pid);
- ucbp->pr_cache.additional = 0;
- }
-
- /* Discover the personality routine address. */
- if (get_remote_word(pid, ucbp->pr_cache.ehtp) & (1u << 31))
- {
- /* One of the predefined standard routines. */
- _uw idx = (get_remote_word(pid, ucbp->pr_cache.ehtp) >> 24) & 0xf;
- if (idx == 0)
- UCB_PR_ADDR (ucbp) = (_uw) &unwind_cpp_pr0_with_ptrace;
- else if (idx == 1)
- UCB_PR_ADDR (ucbp) = (_uw) &unwind_cpp_pr1_with_ptrace;
- else if (idx == 2)
- UCB_PR_ADDR (ucbp) = (_uw) &unwind_cpp_pr2_with_ptrace;
- else
- { /* Failed */
- UCB_PR_ADDR (ucbp) = 0;
- return _URC_FAILURE;
- }
- }
- else
- {
- /* Execute region offset to PR */
- UCB_PR_ADDR (ucbp) = selfrel_offset31 (ucbp->pr_cache.ehtp, pid);
- /* Since we are unwinding the stack from a different process, it is
- * impossible to execute the personality routine in debuggerd. Punt here.
- */
- return _URC_FAILURE;
- }
- return _URC_OK;
-}
-
-/* Print out the current call level, pc, and module name in the crash log */
-static _Unwind_Reason_Code log_function(_Unwind_Context *context, pid_t pid,
- int tfd,
- int stack_level,
- mapinfo *map,
- unsigned int sp_list[],
- bool at_fault)
-{
- _uw pc;
- _uw rel_pc;
- phase2_vrs *vrs = (phase2_vrs*) context;
- const mapinfo *mi;
- bool only_in_tombstone = !at_fault;
- const struct symbol* sym = 0;
-
- if (stack_level < STACK_CONTENT_DEPTH) {
- sp_list[stack_level] = vrs->core.r[R_SP];
- }
- pc = vrs->core.r[R_PC];
-
- // Top level frame
- if (stack_level == 0) {
- pc &= ~1;
- }
- // For deeper framers, rollback pc by one instruction
- else {
- pc = vrs->core.r[R_PC];
- /* Thumb mode - need to check whether the bl(x) has long offset or not.
- * Examples:
- *
- * arm blx in the middle of thumb:
- * 187ae: 2300 movs r3, #0
- * 187b0: f7fe ee1c blx 173ec
- * 187b4: 2c00 cmp r4, #0
- *
- * arm bl in the middle of thumb:
- * 187d8: 1c20 adds r0, r4, #0
- * 187da: f136 fd15 bl 14f208
- * 187de: 2800 cmp r0, #0
- *
- * pure thumb:
- * 18894: 189b adds r3, r3, r2
- * 18896: 4798 blx r3
- * 18898: b001 add sp, #4
- */
- if (pc & 1) {
- _uw prev_word;
- pc = (pc & ~1);
- prev_word = get_remote_word(pid, (char *) pc-4);
- // Long offset
- if ((prev_word & 0xf0000000) == 0xf0000000 &&
- (prev_word & 0x0000e000) == 0x0000e000) {
- pc -= 4;
- }
- else {
- pc -= 2;
- }
- }
- else {
- pc -= 4;
- }
- }
-
- /* We used to print the absolute PC in the back trace, and mask out the top
- * 3 bits to guesstimate the offset in the .so file. This is not working for
- * non-prelinked libraries since the starting offset may not be aligned on
- * 1MB boundaries, and the library may be larger than 1MB. So for .so
- * addresses we print the relative offset in back trace.
- */
- mi = pc_to_mapinfo(map, pc, &rel_pc);
-
- /* See if we can determine what symbol this stack frame resides in */
- if (mi != 0 && mi->symbols != 0) {
- sym = symbol_table_lookup(mi->symbols, rel_pc);
- }
-
- if (sym) {
- _LOG(tfd, only_in_tombstone,
- " #%02d pc %08x %s (%s)\n", stack_level, rel_pc,
- mi ? mi->name : "", sym->name);
- } else {
- _LOG(tfd, only_in_tombstone,
- " #%02d pc %08x %s\n", stack_level, rel_pc,
- mi ? mi->name : "");
- }
-
- return _URC_NO_REASON;
-}
-
-/* Derived from __gnu_Unwind_Backtrace to use ptrace */
-/* Perform stack backtrace through unwind data. Return the level of stack it
- * unwinds.
- */
-int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map,
- unsigned int sp_list[], int *frame0_pc_sane,
- bool at_fault)
-{
- phase1_vrs saved_vrs;
- _Unwind_Reason_Code code = _URC_OK;
- struct pt_regs r;
- int i;
- int stack_level = 0;
-
- _Unwind_Control_Block ucb;
- _Unwind_Control_Block *ucbp = &ucb;
-
- if(ptrace(PTRACE_GETREGS, pid, 0, &r)) return 0;
-
- for (i = 0; i < 16; i++) {
- saved_vrs.core.r[i] = r.uregs[i];
- /*
- _LOG(tfd, "r[%d] = 0x%x\n", i, saved_vrs.core.r[i]);
- */
- }
-
- /* Set demand-save flags. */
- saved_vrs.demand_save_flags = ~(_uw) 0;
-
- /*
- * If the app crashes because of calling the weeds, we cannot pass the PC
- * to the usual unwinding code as the EXIDX mapping will fail.
- * Instead, we simply print out the 0 as the top frame, and resume the
- * unwinding process with the value stored in LR.
- */
- if (get_eitp(saved_vrs.core.r[R_PC], pid, map, NULL) == NULL) {
- *frame0_pc_sane = 0;
- log_function ((_Unwind_Context *) &saved_vrs, pid, tfd, stack_level,
- map, sp_list, at_fault);
- saved_vrs.core.r[R_PC] = saved_vrs.core.r[R_LR];
- stack_level++;
- }
-
- do {
- mapinfo *this_map = NULL;
- /* Find the entry for this routine. */
- if (get_eit_entry(ucbp, saved_vrs.core.r[R_PC], pid, map, &this_map)
- != _URC_OK) {
- /* Uncomment the code below to study why the unwinder failed */
-#if 0
- /* Shed more debugging info for stack unwinder improvement */
- if (this_map) {
- _LOG(tfd, 1,
- "Relative PC=%#x from %s not contained in EXIDX\n",
- saved_vrs.core.r[R_PC] - this_map->start, this_map->name);
- }
- _LOG(tfd, 1, "PC=%#x SP=%#x\n",
- saved_vrs.core.r[R_PC], saved_vrs.core.r[R_SP]);
-#endif
- code = _URC_FAILURE;
- break;
- }
-
- /* The dwarf unwinder assumes the context structure holds things
- like the function and LSDA pointers. The ARM implementation
- caches these in the exception header (UCB). To avoid
- rewriting everything we make the virtual IP register point at
- the UCB. */
- _Unwind_SetGR((_Unwind_Context *)&saved_vrs, 12, (_Unwind_Ptr) ucbp);
-
- /* Call log function. */
- if (log_function ((_Unwind_Context *) &saved_vrs, pid, tfd, stack_level,
- map, sp_list, at_fault) != _URC_NO_REASON) {
- code = _URC_FAILURE;
- break;
- }
- stack_level++;
-
- /* Call the pr to decide what to do. */
- code = ((personality_routine_with_ptrace) UCB_PR_ADDR (ucbp))(
- _US_VIRTUAL_UNWIND_FRAME | _US_FORCE_UNWIND, ucbp,
- (void *) &saved_vrs, pid);
- /*
- * In theory the unwinding process will stop when the end of stack is
- * reached or there is no unwinding information for the code address.
- * To add another level of guarantee that the unwinding process
- * will terminate we will stop it when the STACK_CONTENT_DEPTH is reached.
- */
- } while (code != _URC_END_OF_STACK && code != _URC_FAILURE &&
- stack_level < STACK_CONTENT_DEPTH);
- return stack_level;
-}
-
-
-/* Derived version to use ptrace */
-/* Common implementation for ARM ABI defined personality routines.
- ID is the index of the personality routine, other arguments are as defined
- by __aeabi_unwind_cpp_pr{0,1,2}. */
-
-static _Unwind_Reason_Code
-unwind_pr_common_with_ptrace (_Unwind_State state,
- _Unwind_Control_Block *ucbp,
- _Unwind_Context *context,
- int id,
- pid_t pid)
-{
- __gnu_unwind_state uws;
- _uw *data;
- int phase2_call_unexpected_after_unwind = 0;
-
- state &= _US_ACTION_MASK;
-
- data = (_uw *) ucbp->pr_cache.ehtp;
- uws.data = get_remote_word(pid, data);
- data++;
- uws.next = data;
- if (id == 0)
- {
- uws.data <<= 8;
- uws.words_left = 0;
- uws.bytes_left = 3;
- }
- else
- {
- uws.words_left = (uws.data >> 16) & 0xff;
- uws.data <<= 16;
- uws.bytes_left = 2;
- data += uws.words_left;
- }
-
- /* Restore the saved pointer. */
- if (state == _US_UNWIND_FRAME_RESUME)
- data = (_uw *) ucbp->cleanup_cache.bitpattern[0];
-
- if ((ucbp->pr_cache.additional & 1) == 0)
- {
- /* Process descriptors. */
- while (get_remote_word(pid, data)) {
- /**********************************************************************
- * The original code here seems to deal with exceptions that are not
- * applicable in our toolchain, thus there is no way to test it for now.
- * Instead of leaving it here and causing potential instability in
- * debuggerd, we'd better punt here and leave the stack unwound.
- * In the future when we discover cases where the stack should be unwound
- * further but is not, we can revisit the code here.
- **********************************************************************/
- return _URC_FAILURE;
- }
- /* Finished processing this descriptor. */
- }
-
- if (unwind_execute_with_ptrace (context, &uws, pid) != _URC_OK)
- return _URC_FAILURE;
-
- if (phase2_call_unexpected_after_unwind)
- {
- /* Enter __cxa_unexpected as if called from the call site. */
- _Unwind_SetGR (context, R_LR, _Unwind_GetGR (context, R_PC));
- _Unwind_SetGR (context, R_PC, (_uw) &__cxa_call_unexpected);
- return _URC_INSTALL_CONTEXT;
- }
-
- return _URC_CONTINUE_UNWIND;
-}
-
-
-/* ABI defined personality routine entry points. */
-
-static _Unwind_Reason_Code
-unwind_cpp_pr0_with_ptrace (_Unwind_State state,
- _Unwind_Control_Block *ucbp,
- _Unwind_Context *context,
- pid_t pid)
-{
- return unwind_pr_common_with_ptrace (state, ucbp, context, 0, pid);
-}
-
-static _Unwind_Reason_Code
-unwind_cpp_pr1_with_ptrace (_Unwind_State state,
- _Unwind_Control_Block *ucbp,
- _Unwind_Context *context,
- pid_t pid)
-{
- return unwind_pr_common_with_ptrace (state, ucbp, context, 1, pid);
-}
-
-static _Unwind_Reason_Code
-unwind_cpp_pr2_with_ptrace (_Unwind_State state,
- _Unwind_Control_Block *ucbp,
- _Unwind_Context *context,
- pid_t pid)
-{
- return unwind_pr_common_with_ptrace (state, ucbp, context, 2, pid);
-}
diff --git a/debuggerd/debuggerd.c b/debuggerd/debuggerd.c
index 2acf26d..1599439 100644
--- a/debuggerd/debuggerd.c
+++ b/debuggerd/debuggerd.c
@@ -34,77 +34,19 @@
#include <cutils/logger.h>
#include <cutils/properties.h>
+#include <corkscrew/backtrace.h>
+
#include <linux/input.h>
#include <private/android_filesystem_config.h>
-#include "debuggerd.h"
+#include "getevent.h"
+#include "machine.h"
#include "utility.h"
#define ANDROID_LOG_INFO 4
-void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
- __attribute__ ((format(printf, 3, 4)));
-
-/* Log information onto the tombstone */
-void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
-{
- char buf[512];
-
- va_list ap;
- va_start(ap, fmt);
-
- if (tfd >= 0) {
- int len;
- vsnprintf(buf, sizeof(buf), fmt, ap);
- len = strlen(buf);
- if(tfd >= 0) write(tfd, buf, len);
- }
-
- if (!in_tombstone_only)
- __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap);
- va_end(ap);
-}
-
-// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so
-// 012345678901234567890123456789012345678901234567890123456789
-// 0 1 2 3 4 5
-
-mapinfo *parse_maps_line(char *line)
-{
- mapinfo *mi;
- int len = strlen(line);
-
- if (len < 1) return 0; /* not expected */
- line[--len] = 0;
-
- if (len < 50) {
- mi = malloc(sizeof(mapinfo) + 1);
- } else {
- mi = malloc(sizeof(mapinfo) + (len - 47));
- }
- if (mi == 0) return 0;
-
- mi->isExecutable = (line[20] == 'x');
-
- mi->start = strtoul(line, 0, 16);
- mi->end = strtoul(line + 9, 0, 16);
- /* To be filled in parse_elf_info if the mapped section starts with
- * elf_header
- */
- mi->exidx_start = mi->exidx_end = 0;
- mi->symbols = 0;
- mi->next = 0;
- if (len < 50) {
- mi->name[0] = '\0';
- } else {
- strcpy(mi->name, line + 49);
- }
-
- return mi;
-}
-
-void dump_build_info(int tfd)
+static void dump_build_info(int tfd)
{
char fingerprint[PROPERTY_VALUE_MAX];
@@ -113,7 +55,7 @@
_LOG(tfd, false, "Build fingerprint: '%s'\n", fingerprint);
}
-const char *get_signame(int sig)
+static const char *get_signame(int sig)
{
switch(sig) {
case SIGILL: return "SIGILL";
@@ -126,7 +68,7 @@
}
}
-const char *get_sigcode(int signo, int code)
+static const char *get_sigcode(int signo, int code)
{
switch (signo) {
case SIGILL:
@@ -170,7 +112,7 @@
return "?";
}
-void dump_fault_addr(int tfd, int pid, int sig)
+static void dump_fault_addr(int tfd, pid_t pid, int sig)
{
siginfo_t si;
@@ -188,7 +130,7 @@
}
}
-void dump_crash_banner(int tfd, unsigned pid, unsigned tid, int sig)
+static void dump_crash_banner(int tfd, pid_t pid, pid_t tid, int sig)
{
char data[1024];
char *x = 0;
@@ -202,187 +144,19 @@
}
_LOG(tfd, false,
- "*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n");
+ "*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n");
dump_build_info(tfd);
_LOG(tfd, false, "pid: %d, tid: %d >>> %s <<<\n",
pid, tid, x ? x : "UNKNOWN");
- if(sig) dump_fault_addr(tfd, tid, sig);
-}
-
-static void parse_elf_info(mapinfo *milist, pid_t pid)
-{
- mapinfo *mi;
- for (mi = milist; mi != NULL; mi = mi->next) {
- if (!mi->isExecutable)
- continue;
-
- Elf32_Ehdr ehdr;
-
- memset(&ehdr, 0, sizeof(Elf32_Ehdr));
- /* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of
- * mapped section.
- */
- get_remote_struct(pid, (void *) (mi->start), &ehdr,
- sizeof(Elf32_Ehdr));
- /* Check if it has the matching magic words */
- if (IS_ELF(ehdr)) {
- Elf32_Phdr phdr;
- Elf32_Phdr *ptr;
- int i;
-
- ptr = (Elf32_Phdr *) (mi->start + ehdr.e_phoff);
- for (i = 0; i < ehdr.e_phnum; i++) {
- /* Parse the program header */
- get_remote_struct(pid, (char *) (ptr+i), &phdr,
- sizeof(Elf32_Phdr));
-#ifdef __arm__
- /* Found a EXIDX segment? */
- if (phdr.p_type == PT_ARM_EXIDX) {
- mi->exidx_start = mi->start + phdr.p_offset;
- mi->exidx_end = mi->exidx_start + phdr.p_filesz;
- break;
- }
-#endif
- }
-
- /* Try to load symbols from this file */
- mi->symbols = symbol_table_create(mi->name);
- }
+ if(sig) {
+ dump_fault_addr(tfd, tid, sig);
}
}
-void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault)
-{
- char data[1024];
- FILE *fp;
- mapinfo *milist = 0;
- unsigned int sp_list[STACK_CONTENT_DEPTH];
- int stack_depth;
-#ifdef __arm__
- int frame0_pc_sane = 1;
-#endif
-
- if (!at_fault) {
- _LOG(tfd, true,
- "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n");
- _LOG(tfd, true, "pid: %d, tid: %d\n", pid, tid);
- }
-
- dump_registers(tfd, tid, at_fault);
-
- /* Clear stack pointer records */
- memset(sp_list, 0, sizeof(sp_list));
-
- sprintf(data, "/proc/%d/maps", pid);
- fp = fopen(data, "r");
- if(fp) {
- while(fgets(data, 1024, fp)) {
- mapinfo *mi = parse_maps_line(data);
- if(mi) {
- mi->next = milist;
- milist = mi;
- }
- }
- fclose(fp);
- }
-
- parse_elf_info(milist, tid);
-
-#if __arm__
- /* If stack unwinder fails, use the default solution to dump the stack
- * content.
- */
- stack_depth = unwind_backtrace_with_ptrace(tfd, tid, milist, sp_list,
- &frame0_pc_sane, at_fault);
-
- /* The stack unwinder should at least unwind two levels of stack. If less
- * level is seen we make sure at lease pc and lr are dumped.
- */
- if (stack_depth < 2) {
- dump_pc_and_lr(tfd, tid, milist, stack_depth, at_fault);
- }
-
- dump_stack_and_code(tfd, tid, milist, stack_depth, sp_list, at_fault);
-#elif __i386__
- /* If stack unwinder fails, use the default solution to dump the stack
- * content.
- */
- stack_depth = unwind_backtrace_with_ptrace_x86(tfd, tid, milist,at_fault);
-#else
-#error "Unsupported architecture"
-#endif
-
- while(milist) {
- mapinfo *next = milist->next;
- symbol_table_free(milist->symbols);
- free(milist);
- milist = next;
- }
-}
-
-#define MAX_TOMBSTONES 10
-
-#define typecheck(x,y) { \
- typeof(x) __dummy1; \
- typeof(y) __dummy2; \
- (void)(&__dummy1 == &__dummy2); }
-
-#define TOMBSTONE_DIR "/data/tombstones"
-
-/*
- * find_and_open_tombstone - find an available tombstone slot, if any, of the
- * form tombstone_XX where XX is 00 to MAX_TOMBSTONES-1, inclusive. If no
- * file is available, we reuse the least-recently-modified file.
- */
-static int find_and_open_tombstone(void)
-{
- unsigned long mtime = ULONG_MAX;
- struct stat sb;
- char path[128];
- int fd, i, oldest = 0;
-
- /*
- * XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought
- * to, our logic breaks. This check will generate a warning if that happens.
- */
- typecheck(mtime, sb.st_mtime);
-
- /*
- * In a single wolf-like pass, find an available slot and, in case none
- * exist, find and record the least-recently-modified file.
- */
- for (i = 0; i < MAX_TOMBSTONES; i++) {
- snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", i);
-
- if (!stat(path, &sb)) {
- if (sb.st_mtime < mtime) {
- oldest = i;
- mtime = sb.st_mtime;
- }
- continue;
- }
- if (errno != ENOENT)
- continue;
-
- fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0600);
- if (fd < 0)
- continue; /* raced ? */
-
- fchown(fd, AID_SYSTEM, AID_SYSTEM);
- return fd;
- }
-
- /* we didn't find an available file, so we clobber the oldest one */
- snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", oldest);
- fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
- fchown(fd, AID_SYSTEM, AID_SYSTEM);
-
- return fd;
-}
-
/* Return true if some thread is not detached cleanly */
-static bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid)
+static bool dump_sibling_thread_report(ptrace_context_t* context,
+ int tfd, pid_t pid, pid_t tid)
{
char task_path[1024];
@@ -398,7 +172,7 @@
return false;
}
while ((de = readdir(d)) != NULL) {
- unsigned new_tid;
+ pid_t new_tid;
/* Ignore "." and ".." */
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
@@ -411,7 +185,11 @@
if (ptrace(PTRACE_ATTACH, new_tid, 0, 0) < 0)
continue;
- dump_crash_report(tfd, pid, new_tid, false);
+ _LOG(tfd, true,
+ "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n");
+ _LOG(tfd, true, "pid: %d, tid: %d\n", pid, new_tid);
+
+ dump_thread(context, tfd, new_tid, false);
if (ptrace(PTRACE_DETACH, new_tid, 0, 0) != 0) {
XLOG("detach of tid %d failed: %s\n", new_tid, strerror(errno));
@@ -429,7 +207,7 @@
*
* If "tailOnly" is set, we only print the last few lines.
*/
-static void dump_log_file(int tfd, unsigned pid, const char* filename,
+static void dump_log_file(int tfd, pid_t pid, const char* filename,
bool tailOnly)
{
bool first = true;
@@ -561,23 +339,112 @@
* Dumps the logs generated by the specified pid to the tombstone, from both
* "system" and "main" log devices. Ideally we'd interleave the output.
*/
-static void dump_logs(int tfd, unsigned pid, bool tailOnly)
+static void dump_logs(int tfd, pid_t pid, bool tailOnly)
{
dump_log_file(tfd, pid, "/dev/log/system", tailOnly);
dump_log_file(tfd, pid, "/dev/log/main", tailOnly);
}
-/* Return true if some thread is not detached cleanly */
-static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid,
- int signal)
+/*
+ * Dumps all information about the specified pid to the tombstone.
+ */
+static bool dump_crash(int tfd, pid_t pid, pid_t tid, int signal,
+ bool dump_sibling_threads)
{
- int fd;
- bool need_cleanup = false;
-
/* don't copy log messages to tombstone unless this is a dev device */
char value[PROPERTY_VALUE_MAX];
property_get("ro.debuggable", value, "0");
bool wantLogs = (value[0] == '1');
+ bool need_cleanup = false;
+
+ dump_crash_banner(tfd, pid, tid, signal);
+
+ ptrace_context_t* context = load_ptrace_context(pid);
+
+ dump_thread(context, tfd, tid, true);
+
+ if (wantLogs) {
+ dump_logs(tfd, pid, true);
+ }
+
+ if (dump_sibling_threads) {
+ need_cleanup = dump_sibling_thread_report(context, tfd, pid, tid);
+ }
+
+ free_ptrace_context(context);
+
+ if (wantLogs) {
+ dump_logs(tfd, pid, false);
+ }
+ return need_cleanup;
+}
+
+#define MAX_TOMBSTONES 10
+
+#define typecheck(x,y) { \
+ typeof(x) __dummy1; \
+ typeof(y) __dummy2; \
+ (void)(&__dummy1 == &__dummy2); }
+
+#define TOMBSTONE_DIR "/data/tombstones"
+
+/*
+ * find_and_open_tombstone - find an available tombstone slot, if any, of the
+ * form tombstone_XX where XX is 00 to MAX_TOMBSTONES-1, inclusive. If no
+ * file is available, we reuse the least-recently-modified file.
+ */
+static int find_and_open_tombstone(void)
+{
+ unsigned long mtime = ULONG_MAX;
+ struct stat sb;
+ char path[128];
+ int fd, i, oldest = 0;
+
+ /*
+ * XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought
+ * to, our logic breaks. This check will generate a warning if that happens.
+ */
+ typecheck(mtime, sb.st_mtime);
+
+ /*
+ * In a single wolf-like pass, find an available slot and, in case none
+ * exist, find and record the least-recently-modified file.
+ */
+ for (i = 0; i < MAX_TOMBSTONES; i++) {
+ snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", i);
+
+ if (!stat(path, &sb)) {
+ if (sb.st_mtime < mtime) {
+ oldest = i;
+ mtime = sb.st_mtime;
+ }
+ continue;
+ }
+ if (errno != ENOENT)
+ continue;
+
+ fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0600);
+ if (fd < 0)
+ continue; /* raced ? */
+
+ fchown(fd, AID_SYSTEM, AID_SYSTEM);
+ return fd;
+ }
+
+ /* we didn't find an available file, so we clobber the oldest one */
+ snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", oldest);
+ fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
+ fchown(fd, AID_SYSTEM, AID_SYSTEM);
+
+ return fd;
+}
+
+/* Return true if some thread is not detached cleanly */
+static bool engrave_tombstone(pid_t pid, pid_t tid, int signal,
+ bool dump_sibling_threads)
+{
+ int fd;
+ bool need_cleanup = false;
mkdir(TOMBSTONE_DIR, 0755);
chown(TOMBSTONE_DIR, AID_SYSTEM, AID_SYSTEM);
@@ -586,24 +453,7 @@
if (fd < 0)
return need_cleanup;
- dump_crash_banner(fd, pid, tid, signal);
- dump_crash_report(fd, pid, tid, true);
-
- if (wantLogs) {
- dump_logs(fd, pid, true);
- }
-
- /*
- * If the user has requested to attach gdb, don't collect the per-thread
- * information as it increases the chance to lose track of the process.
- */
- if ((signed)pid > debug_uid) {
- need_cleanup = dump_sibling_thread_report(fd, pid, tid);
- }
-
- if (wantLogs) {
- dump_logs(fd, pid, false);
- }
+ need_cleanup = dump_crash(fd, pid, tid, signal, dump_sibling_threads);
close(fd);
return need_cleanup;
@@ -654,11 +504,7 @@
write_string("/sys/class/leds/left/cadence", "0,0");
}
-extern int init_getevent();
-extern void uninit_getevent();
-extern int get_event(struct input_event* event, int timeout);
-
-static void wait_for_user_action(unsigned tid, struct ucred* cr)
+static void wait_for_user_action(pid_t tid, struct ucred* cr)
{
(void)tid;
/* First log a helpful message */
@@ -718,19 +564,19 @@
{
char buf[64];
struct stat s;
- unsigned tid;
+ pid_t tid;
struct ucred cr;
int n, len, status;
int tid_attach_status = -1;
unsigned retry = 30;
bool need_cleanup = false;
+ XLOG("handle_crashing_process(%d)\n", fd);
+
char value[PROPERTY_VALUE_MAX];
property_get("debug.db.uid", value, "-1");
int debug_uid = atoi(value);
- XLOG("handle_crashing_process(%d)\n", fd);
-
len = sizeof(cr);
n = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &len);
if(n != 0) {
@@ -740,7 +586,7 @@
XLOG("reading tid\n");
fcntl(fd, F_SETFL, O_NONBLOCK);
- while((n = read(fd, &tid, sizeof(unsigned))) != sizeof(unsigned)) {
+ while((n = read(fd, &tid, sizeof(pid_t))) != sizeof(pid_t)) {
if(errno == EINTR) continue;
if(errno == EWOULDBLOCK) {
if(retry-- > 0) {
@@ -764,6 +610,12 @@
XLOG("BOOM: pid=%d uid=%d gid=%d tid=%d\n", cr.pid, cr.uid, cr.gid, tid);
+ /*
+ * If the user has requested to attach gdb, don't collect the per-thread
+ * information as it increases the chance to lose track of the process.
+ */
+ bool dump_sibling_threads = (signed)cr.pid > debug_uid;
+
/* Note that at this point, the target thread's signal handler
* is blocked in a read() call. This gives us the time to PTRACE_ATTACH
* to it before it has a chance to really fault.
@@ -837,7 +689,8 @@
case SIGSEGV:
case SIGSTKFLT: {
XLOG("stopped -- fatal signal\n");
- need_cleanup = engrave_tombstone(cr.pid, tid, debug_uid, n);
+ need_cleanup = engrave_tombstone(cr.pid, tid, n,
+ dump_sibling_threads);
kill(tid, SIGSTOP);
goto done;
}
diff --git a/debuggerd/debuggerd.h b/debuggerd/debuggerd.h
deleted file mode 100644
index e3cdc7c..0000000
--- a/debuggerd/debuggerd.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/* system/debuggerd/debuggerd.h
-**
-** Copyright 2006, 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 <cutils/logd.h>
-#include <sys/ptrace.h>
-#include <unwind.h>
-#include "utility.h"
-#include "symbol_table.h"
-
-
-/* Main entry point to get the backtrace from the crashing process */
-extern int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map,
- unsigned int sp_list[],
- int *frame0_pc_sane,
- bool at_fault);
-
-extern void dump_registers(int tfd, int pid, bool at_fault);
-
-extern int unwind_backtrace_with_ptrace_x86(int tfd, pid_t pid, mapinfo *map, bool at_fault);
-
-void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level, bool at_fault);
-
-void dump_stack_and_code(int tfd, int pid, mapinfo *map,
- int unwind_depth, unsigned int sp_list[],
- bool at_fault);
diff --git a/debuggerd/getevent.h b/debuggerd/getevent.h
new file mode 100644
index 0000000..426139d
--- /dev/null
+++ b/debuggerd/getevent.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#ifndef _DEBUGGERD_GETEVENT_H
+#define _DEBUGGERD_GETEVENT_H
+
+int init_getevent();
+void uninit_getevent();
+int get_event(struct input_event* event, int timeout);
+
+#endif // _DEBUGGERD_GETEVENT_H
diff --git a/debuggerd/machine.h b/debuggerd/machine.h
new file mode 100644
index 0000000..f9ca6bd
--- /dev/null
+++ b/debuggerd/machine.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#ifndef _DEBUGGERD_MACHINE_H
+#define _DEBUGGERD_MACHINE_H
+
+#include <corkscrew/backtrace.h>
+#include <sys/types.h>
+
+void dump_thread(ptrace_context_t* context, int tfd, pid_t tid, bool at_fault);
+
+#endif // _DEBUGGERD_MACHINE_H
diff --git a/debuggerd/symbol_table.c b/debuggerd/symbol_table.c
deleted file mode 100644
index 23572a3..0000000
--- a/debuggerd/symbol_table.c
+++ /dev/null
@@ -1,240 +0,0 @@
-#include <stdlib.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-
-#include "symbol_table.h"
-#include "utility.h"
-
-#include <linux/elf.h>
-
-// Compare func for qsort
-static int qcompar(const void *a, const void *b)
-{
- return ((struct symbol*)a)->addr - ((struct symbol*)b)->addr;
-}
-
-// Compare func for bsearch
-static int bcompar(const void *addr, const void *element)
-{
- struct symbol *symbol = (struct symbol*)element;
-
- if((unsigned int)addr < symbol->addr) {
- return -1;
- }
-
- if((unsigned int)addr - symbol->addr >= symbol->size) {
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Create a symbol table from a given file
- *
- * Parameters:
- * filename - Filename to process
- *
- * Returns:
- * A newly-allocated SymbolTable structure, or NULL if error.
- * Free symbol table with symbol_table_free()
- */
-struct symbol_table *symbol_table_create(const char *filename)
-{
- struct symbol_table *table = NULL;
-
- // Open the file, and map it into memory
- struct stat sb;
- int length;
- char *base;
-
- XLOG2("Creating symbol table for %s\n", filename);
- int fd = open(filename, O_RDONLY);
-
- if(fd < 0) {
- goto out;
- }
-
- fstat(fd, &sb);
- length = sb.st_size;
-
- base = mmap(NULL, length, PROT_READ, MAP_PRIVATE, fd, 0);
-
- if(!base) {
- goto out_close;
- }
-
- // Parse the file header
- Elf32_Ehdr *hdr = (Elf32_Ehdr*)base;
- Elf32_Shdr *shdr = (Elf32_Shdr*)(base + hdr->e_shoff);
-
- // Search for the dynamic symbols section
- int sym_idx = -1;
- int dynsym_idx = -1;
- int i;
-
- for(i = 0; i < hdr->e_shnum; i++) {
- if(shdr[i].sh_type == SHT_SYMTAB ) {
- sym_idx = i;
- }
- if(shdr[i].sh_type == SHT_DYNSYM ) {
- dynsym_idx = i;
- }
- }
- if ((dynsym_idx == -1) && (sym_idx == -1)) {
- goto out_unmap;
- }
-
- table = malloc(sizeof(struct symbol_table));
- if(!table) {
- goto out_unmap;
- }
- table->name = strdup(filename);
- table->num_symbols = 0;
-
- Elf32_Sym *dynsyms = NULL;
- Elf32_Sym *syms = NULL;
- int dynnumsyms = 0;
- int numsyms = 0;
- char *dynstr = NULL;
- char *str = NULL;
-
- if (dynsym_idx != -1) {
- dynsyms = (Elf32_Sym*)(base + shdr[dynsym_idx].sh_offset);
- dynnumsyms = shdr[dynsym_idx].sh_size / shdr[dynsym_idx].sh_entsize;
- int dynstr_idx = shdr[dynsym_idx].sh_link;
- dynstr = base + shdr[dynstr_idx].sh_offset;
- }
-
- if (sym_idx != -1) {
- syms = (Elf32_Sym*)(base + shdr[sym_idx].sh_offset);
- numsyms = shdr[sym_idx].sh_size / shdr[sym_idx].sh_entsize;
- int str_idx = shdr[sym_idx].sh_link;
- str = base + shdr[str_idx].sh_offset;
- }
-
- int symbol_count = 0;
- int dynsymbol_count = 0;
-
- if (dynsym_idx != -1) {
- // Iterate through the dynamic symbol table, and count how many symbols
- // are actually defined
- for(i = 0; i < dynnumsyms; i++) {
- if(dynsyms[i].st_shndx != SHN_UNDEF) {
- dynsymbol_count++;
- }
- }
- XLOG2("Dynamic Symbol count: %d\n", dynsymbol_count);
- }
-
- if (sym_idx != -1) {
- // Iterate through the symbol table, and count how many symbols
- // are actually defined
- for(i = 0; i < numsyms; i++) {
- if((syms[i].st_shndx != SHN_UNDEF) &&
- (strlen(str+syms[i].st_name)) &&
- (syms[i].st_value != 0) && (syms[i].st_size != 0)) {
- symbol_count++;
- }
- }
- XLOG2("Symbol count: %d\n", symbol_count);
- }
-
- // Now, create an entry in our symbol table structure for each symbol...
- table->num_symbols += symbol_count + dynsymbol_count;
- table->symbols = malloc(table->num_symbols * sizeof(struct symbol));
- if(!table->symbols) {
- free(table);
- table = NULL;
- goto out_unmap;
- }
-
-
- int j = 0;
- if (dynsym_idx != -1) {
- // ...and populate them
- for(i = 0; i < dynnumsyms; i++) {
- if(dynsyms[i].st_shndx != SHN_UNDEF) {
- table->symbols[j].name = strdup(dynstr + dynsyms[i].st_name);
- table->symbols[j].addr = dynsyms[i].st_value;
- table->symbols[j].size = dynsyms[i].st_size;
- XLOG2("name: %s, addr: %x, size: %x\n",
- table->symbols[j].name, table->symbols[j].addr, table->symbols[j].size);
- j++;
- }
- }
- }
-
- if (sym_idx != -1) {
- // ...and populate them
- for(i = 0; i < numsyms; i++) {
- if((syms[i].st_shndx != SHN_UNDEF) &&
- (strlen(str+syms[i].st_name)) &&
- (syms[i].st_value != 0) && (syms[i].st_size != 0)) {
- table->symbols[j].name = strdup(str + syms[i].st_name);
- table->symbols[j].addr = syms[i].st_value;
- table->symbols[j].size = syms[i].st_size;
- XLOG2("name: %s, addr: %x, size: %x\n",
- table->symbols[j].name, table->symbols[j].addr, table->symbols[j].size);
- j++;
- }
- }
- }
-
- // Sort the symbol table entries, so they can be bsearched later
- qsort(table->symbols, table->num_symbols, sizeof(struct symbol), qcompar);
-
-out_unmap:
- munmap(base, length);
-
-out_close:
- close(fd);
-
-out:
- return table;
-}
-
-/*
- * Free a symbol table
- *
- * Parameters:
- * table - Table to free
- */
-void symbol_table_free(struct symbol_table *table)
-{
- int i;
-
- if(!table) {
- return;
- }
-
- for(i=0; i<table->num_symbols; i++) {
- free(table->symbols[i].name);
- }
-
- free(table->symbols);
- free(table);
-}
-
-/*
- * Search for an address in the symbol table
- *
- * Parameters:
- * table - Table to search in
- * addr - Address to search for.
- *
- * Returns:
- * A pointer to the Symbol structure corresponding to the
- * symbol which contains this address, or NULL if no symbol
- * contains it.
- */
-const struct symbol *symbol_table_lookup(struct symbol_table *table, unsigned int addr)
-{
- if(!table) {
- return NULL;
- }
-
- return bsearch((void*)addr, table->symbols, table->num_symbols, sizeof(struct symbol), bcompar);
-}
diff --git a/debuggerd/symbol_table.h b/debuggerd/symbol_table.h
deleted file mode 100644
index 7f41f91..0000000
--- a/debuggerd/symbol_table.h
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef SYMBOL_TABLE_H
-#define SYMBOL_TABLE_H
-
-struct symbol {
- unsigned int addr;
- unsigned int size;
- char *name;
-};
-
-struct symbol_table {
- struct symbol *symbols;
- int num_symbols;
- char *name;
-};
-
-struct symbol_table *symbol_table_create(const char *filename);
-void symbol_table_free(struct symbol_table *table);
-const struct symbol *symbol_table_lookup(struct symbol_table *table, unsigned int addr);
-
-#endif
diff --git a/debuggerd/utility.c b/debuggerd/utility.c
index 409209c..c0fb13a 100644
--- a/debuggerd/utility.c
+++ b/debuggerd/utility.c
@@ -15,81 +15,37 @@
** limitations under the License.
*/
-#include <sys/ptrace.h>
-#include <sys/exec_elf.h>
#include <signal.h>
-#include <assert.h>
#include <string.h>
+#include <cutils/logd.h>
+#include <sys/ptrace.h>
#include <errno.h>
+#include <corkscrew/demangle.h>
#include "utility.h"
-/* Get a word from pid using ptrace. The result is the return value. */
-int get_remote_word(int pid, void *src)
-{
- return ptrace(PTRACE_PEEKTEXT, pid, src, NULL);
-}
+#define STACK_DEPTH 32
+#define STACK_WORDS 16
+void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...) {
+ char buf[512];
-/* Handy routine to read aggregated data from pid using ptrace. The read
- * values are written to the dest locations directly.
- */
-void get_remote_struct(int pid, void *src, void *dst, size_t size)
-{
- unsigned int i;
+ va_list ap;
+ va_start(ap, fmt);
- for (i = 0; i+4 <= size; i+=4) {
- *(int *)((char *)dst+i) = ptrace(PTRACE_PEEKTEXT, pid, (char *)src+i, NULL);
+ if (tfd >= 0) {
+ int len;
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ len = strlen(buf);
+ if(tfd >= 0) write(tfd, buf, len);
}
- if (i < size) {
- int val;
-
- assert((size - i) < 4);
- val = ptrace(PTRACE_PEEKTEXT, pid, (char *)src+i, NULL);
- while (i < size) {
- ((unsigned char *)dst)[i] = val & 0xff;
- i++;
- val >>= 8;
- }
- }
+ if (!in_tombstone_only)
+ __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap);
+ va_end(ap);
}
-/* Map a pc address to the name of the containing ELF file */
-const char *map_to_name(mapinfo *mi, unsigned pc, const char* def)
-{
- while(mi) {
- if((pc >= mi->start) && (pc < mi->end)){
- return mi->name;
- }
- mi = mi->next;
- }
- return def;
-}
-
-/* Find the containing map info for the pc */
-const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc)
-{
- *rel_pc = pc;
- while(mi) {
- if((pc >= mi->start) && (pc < mi->end)){
- // Only calculate the relative offset for shared libraries
- if (strstr(mi->name, ".so")) {
- *rel_pc -= mi->start;
- }
- return mi;
- }
- mi = mi->next;
- }
- return NULL;
-}
-
-/*
- * Returns true if the specified signal has an associated address (i.e. it
- * sets siginfo_t.si_addr).
- */
-bool signal_has_address(int sig)
-{
+bool signal_has_address(int sig) {
switch (sig) {
case SIGILL:
case SIGFPE:
@@ -100,3 +56,248 @@
return false;
}
}
+
+static void dump_backtrace(ptrace_context_t* context __attribute((unused)),
+ int tfd, int pid __attribute((unused)), bool at_fault,
+ const backtrace_frame_t* backtrace, size_t frames) {
+ _LOG(tfd, !at_fault, "\nbacktrace:\n");
+
+ backtrace_symbol_t backtrace_symbols[STACK_DEPTH];
+ get_backtrace_symbols_ptrace(context, backtrace, frames, backtrace_symbols);
+ for (size_t i = 0; i < frames; i++) {
+ const backtrace_symbol_t* symbol = &backtrace_symbols[i];
+ const char* map_name = symbol->map_info ? symbol->map_info->name : "<unknown>";
+ const char* symbol_name = symbol->demangled_name ? symbol->demangled_name : symbol->name;
+ if (symbol_name) {
+ _LOG(tfd, !at_fault, " #%02d pc %08x %s (%s)\n",
+ (int)i, symbol->relative_pc, map_name, symbol_name);
+ } else {
+ _LOG(tfd, !at_fault, " #%02d pc %08x %s\n",
+ (int)i, symbol->relative_pc, map_name);
+ }
+ }
+ free_backtrace_symbols(backtrace_symbols, frames);
+}
+
+static void dump_stack_segment(ptrace_context_t* context, int tfd, int pid,
+ bool only_in_tombstone, uintptr_t* sp, size_t words, int label) {
+ for (size_t i = 0; i < words; i++) {
+ uint32_t stack_content;
+ if (!try_get_word(pid, *sp, &stack_content)) {
+ break;
+ }
+
+ const map_info_t* mi;
+ const symbol_t* symbol;
+ find_symbol_ptrace(context, stack_content, &mi, &symbol);
+
+ if (symbol) {
+ char* demangled_name = demangle_symbol_name(symbol->name);
+ const char* symbol_name = demangled_name ? demangled_name : symbol->name;
+ if (!i && label >= 0) {
+ _LOG(tfd, only_in_tombstone, " #%02d %08x %08x %s (%s)\n",
+ label, *sp, stack_content, mi ? mi->name : "", symbol_name);
+ } else {
+ _LOG(tfd, only_in_tombstone, " %08x %08x %s (%s)\n",
+ *sp, stack_content, mi ? mi->name : "", symbol_name);
+ }
+ free(demangled_name);
+ } else {
+ if (!i && label >= 0) {
+ _LOG(tfd, only_in_tombstone, " #%02d %08x %08x %s\n",
+ label, *sp, stack_content, mi ? mi->name : "");
+ } else {
+ _LOG(tfd, only_in_tombstone, " %08x %08x %s\n",
+ *sp, stack_content, mi ? mi->name : "");
+ }
+ }
+
+ *sp += sizeof(uint32_t);
+ }
+}
+
+static void dump_stack(ptrace_context_t* context, int tfd, int pid, bool at_fault,
+ const backtrace_frame_t* backtrace, size_t frames) {
+ bool have_first = false;
+ size_t first, last;
+ for (size_t i = 0; i < frames; i++) {
+ if (backtrace[i].stack_top) {
+ if (!have_first) {
+ have_first = true;
+ first = i;
+ }
+ last = i;
+ }
+ }
+ if (!have_first) {
+ return;
+ }
+
+ _LOG(tfd, !at_fault, "\nstack:\n");
+
+ // Dump a few words before the first frame.
+ bool only_in_tombstone = !at_fault;
+ uintptr_t sp = backtrace[first].stack_top - STACK_WORDS * sizeof(uint32_t);
+ dump_stack_segment(context, tfd, pid, only_in_tombstone, &sp, STACK_WORDS, -1);
+
+ // Dump a few words from all successive frames.
+ // Only log the first 3 frames, put the rest in the tombstone.
+ for (size_t i = first; i <= last; i++) {
+ const backtrace_frame_t* frame = &backtrace[i];
+ if (sp != frame->stack_top) {
+ _LOG(tfd, only_in_tombstone, " ........ ........\n");
+ sp = frame->stack_top;
+ }
+ if (i - first == 3) {
+ only_in_tombstone = true;
+ }
+ if (i == last) {
+ dump_stack_segment(context, tfd, pid, only_in_tombstone, &sp, STACK_WORDS, i);
+ if (sp < frame->stack_top + frame->stack_size) {
+ _LOG(tfd, only_in_tombstone, " ........ ........\n");
+ }
+ } else {
+ size_t words = frame->stack_size / sizeof(uint32_t);
+ if (words == 0) {
+ words = 1;
+ } else if (words > STACK_WORDS) {
+ words = STACK_WORDS;
+ }
+ dump_stack_segment(context, tfd, pid, only_in_tombstone, &sp, words, i);
+ }
+ }
+}
+
+void dump_backtrace_and_stack(ptrace_context_t* context, int tfd, pid_t tid, bool at_fault) {
+ backtrace_frame_t backtrace[STACK_DEPTH];
+ ssize_t frames = unwind_backtrace_ptrace(tid, context, backtrace, 0, STACK_DEPTH);
+ if (frames > 0) {
+ dump_backtrace(context, tfd, tid, at_fault, backtrace, frames);
+ dump_stack(context, tfd, tid, at_fault, backtrace, frames);
+ }
+}
+
+void dump_memory(int tfd, pid_t tid, uintptr_t addr, bool at_fault) {
+ char code_buffer[64]; /* actual 8+1+((8+1)*4) + 1 == 45 */
+ char ascii_buffer[32]; /* actual 16 + 1 == 17 */
+ uintptr_t p, end;
+
+ p = addr & ~3;
+ p -= 32;
+ if (p > addr) {
+ /* catch underflow */
+ p = 0;
+ }
+ end = p + 80;
+ /* catch overflow; 'end - p' has to be multiples of 16 */
+ while (end < p)
+ end -= 16;
+
+ /* Dump the code around PC as:
+ * addr contents ascii
+ * 00008d34 ef000000 e8bd0090 e1b00000 512fff1e ............../Q
+ * 00008d44 ea00b1f9 e92d0090 e3a070fc ef000000 ......-..p......
+ */
+ while (p < end) {
+ char* asc_out = ascii_buffer;
+
+ sprintf(code_buffer, "%08x ", p);
+
+ int i;
+ for (i = 0; i < 4; i++) {
+ /*
+ * If we see (data == -1 && errno != 0), we know that the ptrace
+ * call failed, probably because we're dumping memory in an
+ * unmapped or inaccessible page. I don't know if there's
+ * value in making that explicit in the output -- it likely
+ * just complicates parsing and clarifies nothing for the
+ * enlightened reader.
+ */
+ long data = ptrace(PTRACE_PEEKTEXT, tid, (void*)p, NULL);
+ sprintf(code_buffer + strlen(code_buffer), "%08lx ", data);
+
+ int j;
+ for (j = 0; j < 4; j++) {
+ /*
+ * Our isprint() allows high-ASCII characters that display
+ * differently (often badly) in different viewers, so we
+ * just use a simpler test.
+ */
+ char val = (data >> (j*8)) & 0xff;
+ if (val >= 0x20 && val < 0x7f) {
+ *asc_out++ = val;
+ } else {
+ *asc_out++ = '.';
+ }
+ }
+ p += 4;
+ }
+ *asc_out = '\0';
+ _LOG(tfd, !at_fault, " %s %s\n", code_buffer, ascii_buffer);
+ }
+}
+
+void dump_nearby_maps(ptrace_context_t* context, int tfd, pid_t tid) {
+ siginfo_t si;
+ memset(&si, 0, sizeof(si));
+ if (ptrace(PTRACE_GETSIGINFO, tid, 0, &si)) {
+ _LOG(tfd, false, "cannot get siginfo for %d: %s\n",
+ tid, strerror(errno));
+ return;
+ }
+ if (!signal_has_address(si.si_signo)) {
+ return;
+ }
+
+ uintptr_t addr = (uintptr_t) si.si_addr;
+ addr &= ~0xfff; /* round to 4K page boundary */
+ if (addr == 0) { /* null-pointer deref */
+ return;
+ }
+
+ _LOG(tfd, false, "\nmemory map around fault addr %08x:\n", (int)si.si_addr);
+
+ /*
+ * Search for a match, or for a hole where the match would be. The list
+ * is backward from the file content, so it starts at high addresses.
+ */
+ bool found = false;
+ map_info_t* map = context->map_info_list;
+ map_info_t *next = NULL;
+ map_info_t *prev = NULL;
+ while (map != NULL) {
+ if (addr >= map->start && addr < map->end) {
+ found = true;
+ next = map->next;
+ break;
+ } else if (addr >= map->end) {
+ /* map would be between "prev" and this entry */
+ next = map;
+ map = NULL;
+ break;
+ }
+
+ prev = map;
+ map = map->next;
+ }
+
+ /*
+ * Show "next" then "match" then "prev" so that the addresses appear in
+ * ascending order (like /proc/pid/maps).
+ */
+ if (next != NULL) {
+ _LOG(tfd, false, " %08x-%08x %s\n", next->start, next->end, next->name);
+ } else {
+ _LOG(tfd, false, " (no map below)\n");
+ }
+ if (map != NULL) {
+ _LOG(tfd, false, " %08x-%08x %s\n", map->start, map->end, map->name);
+ } else {
+ _LOG(tfd, false, " (no map for address)\n");
+ }
+ if (prev != NULL) {
+ _LOG(tfd, false, " %08x-%08x %s\n", prev->start, prev->end, prev->name);
+ } else {
+ _LOG(tfd, false, " (no map above)\n");
+ }
+}
diff --git a/debuggerd/utility.h b/debuggerd/utility.h
index 4a935d2..879c8b4 100644
--- a/debuggerd/utility.h
+++ b/debuggerd/utility.h
@@ -15,50 +15,17 @@
** limitations under the License.
*/
-#ifndef __utility_h
-#define __utility_h
+#ifndef _DEBUGGERD_UTILITY_H
+#define _DEBUGGERD_UTILITY_H
#include <stddef.h>
#include <stdbool.h>
+#include <sys/types.h>
+#include <corkscrew/backtrace.h>
-#include "symbol_table.h"
-
-#ifndef PT_ARM_EXIDX
-#define PT_ARM_EXIDX 0x70000001 /* .ARM.exidx segment */
-#endif
-
-#define STACK_CONTENT_DEPTH 32
-
-typedef struct mapinfo {
- struct mapinfo *next;
- unsigned start;
- unsigned end;
- unsigned exidx_start;
- unsigned exidx_end;
- struct symbol_table *symbols;
- bool isExecutable;
- char name[];
-} mapinfo;
-
-/* Get a word from pid using ptrace. The result is the return value. */
-extern int get_remote_word(int pid, void *src);
-
-/* Handy routine to read aggregated data from pid using ptrace. The read
- * values are written to the dest locations directly.
- */
-extern void get_remote_struct(int pid, void *src, void *dst, size_t size);
-
-/* Find the containing map for the pc */
-const mapinfo *pc_to_mapinfo (mapinfo *mi, unsigned pc, unsigned *rel_pc);
-
-/* Map a pc address to the name of the containing ELF file */
-const char *map_to_name(mapinfo *mi, unsigned pc, const char* def);
-
-/* Log information onto the tombstone */
-extern void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...);
-
-/* Determine whether si_addr is valid for this signal */
-bool signal_has_address(int sig);
+/* Log information onto the tombstone. */
+void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
+ __attribute__ ((format(printf, 3, 4)));
#define LOG(fmt...) _LOG(-1, 0, fmt)
@@ -76,4 +43,30 @@
#define XLOG2(fmt...) do {} while(0)
#endif
-#endif
+/*
+ * Returns true if the specified signal has an associated address.
+ * (i.e. it sets siginfo_t.si_addr).
+ */
+bool signal_has_address(int sig);
+
+/*
+ * Dumps the backtrace and contents of the stack.
+ */
+void dump_backtrace_and_stack(ptrace_context_t* context, int tfd, pid_t pid, bool at_fault);
+
+/*
+ * Dumps a few bytes of memory, starting a bit before and ending a bit
+ * after the specified address.
+ */
+void dump_memory(int tfd, pid_t tid, uintptr_t addr, bool at_fault);
+
+/*
+ * If this isn't clearly a null pointer dereference, dump the
+ * /proc/maps entries near the fault address.
+ *
+ * This only makes sense to do on the thread that crashed.
+ */
+void dump_nearby_maps(ptrace_context_t* context, int tfd, pid_t tid);
+
+
+#endif // _DEBUGGERD_UTILITY_H
diff --git a/debuggerd/x86/machine.c b/debuggerd/x86/machine.c
index 9d418cf..57f51c8 100644
--- a/debuggerd/x86/machine.c
+++ b/debuggerd/x86/machine.c
@@ -31,31 +31,43 @@
#include <cutils/sockets.h>
#include <cutils/properties.h>
+#include <corkscrew/backtrace.h>
+#include <corkscrew/ptrace.h>
+
#include <linux/input.h>
+#include "../machine.h"
#include "../utility.h"
-#include "x86_utility.h"
-void dump_registers(int tfd, int pid, bool at_fault)
-{
+static void dump_registers(ptrace_context_t* context __attribute((unused)),
+ int tfd, pid_t pid, bool at_fault) {
struct pt_regs_x86 r;
bool only_in_tombstone = !at_fault;
if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
- _LOG(tfd, only_in_tombstone,
- "cannot get registers: %s\n", strerror(errno));
+ _LOG(tfd, only_in_tombstone, "cannot get registers: %s\n", strerror(errno));
return;
}
-//if there is no stack, no print just like arm
+ //if there is no stack, no print just like arm
if(!r.ebp)
return;
- _LOG(tfd, only_in_tombstone, " eax %08x ebx %08x ecx %08x edx %08x\n",
+ _LOG(tfd, only_in_tombstone, " eax %08x ebx %08x ecx %08x edx %08x\n",
r.eax, r.ebx, r.ecx, r.edx);
- _LOG(tfd, only_in_tombstone, " esi %08x edi %08x\n",
+ _LOG(tfd, only_in_tombstone, " esi %08x edi %08x\n",
r.esi, r.edi);
- _LOG(tfd, only_in_tombstone, " xcs %08x xds %08x xes %08x xfs %08x xss %08x\n",
+ _LOG(tfd, only_in_tombstone, " xcs %08x xds %08x xes %08x xfs %08x xss %08x\n",
r.xcs, r.xds, r.xes, r.xfs, r.xss);
- _LOG(tfd, only_in_tombstone,
- " eip %08x ebp %08x esp %08x flags %08x\n",
+ _LOG(tfd, only_in_tombstone, " eip %08x ebp %08x esp %08x flags %08x\n",
r.eip, r.ebp, r.esp, r.eflags);
}
+
+void dump_thread(ptrace_context_t* context, int tfd, pid_t tid, bool at_fault) {
+ dump_registers(context, tfd, tid, at_fault);
+
+ dump_backtrace_and_stack(context, tfd, tid, at_fault);
+
+ if (at_fault) {
+ dump_nearby_maps(context, tfd, tid);
+ }
+}
+
diff --git a/debuggerd/x86/unwind.c b/debuggerd/x86/unwind.c
deleted file mode 100644
index 0a7f04c..0000000
--- a/debuggerd/x86/unwind.c
+++ /dev/null
@@ -1,86 +0,0 @@
-#include <cutils/logd.h>
-#include <sys/ptrace.h>
-#include "../utility.h"
-#include "x86_utility.h"
-
-
-int unwind_backtrace_with_ptrace_x86(int tfd, pid_t pid, mapinfo *map,
- bool at_fault)
-{
- struct pt_regs_x86 r;
- unsigned int stack_level = 0;
- unsigned int stack_depth = 0;
- unsigned int rel_pc;
- unsigned int stack_ptr;
- unsigned int stack_content;
-
- if(ptrace(PTRACE_GETREGS, pid, 0, &r)) return 0;
- unsigned int eip = (unsigned int)r.eip;
- unsigned int ebp = (unsigned int)r.ebp;
- unsigned int cur_sp = (unsigned int)r.esp;
- const mapinfo *mi;
- const struct symbol* sym = 0;
-
-
-//ebp==0, it indicates that the stack is poped to the bottom or there is no stack at all.
- while (ebp) {
- mi = pc_to_mapinfo(map, eip, &rel_pc);
-
- /* See if we can determine what symbol this stack frame resides in */
- if (mi != 0 && mi->symbols != 0) {
- sym = symbol_table_lookup(mi->symbols, rel_pc);
- }
- if (sym) {
- _LOG(tfd, !at_fault, " #%02d eip: %08x %s (%s)\n",
- stack_level, eip, mi ? mi->name : "", sym->name);
- } else {
- _LOG(tfd, !at_fault, " #%02d eip: %08x %s\n",
- stack_level, eip, mi ? mi->name : "");
- }
-
- stack_level++;
- if (stack_level >= STACK_DEPTH || eip == 0)
- break;
- eip = ptrace(PTRACE_PEEKTEXT, pid, (void*)(ebp + 4), NULL);
- ebp = ptrace(PTRACE_PEEKTEXT, pid, (void*)ebp, NULL);
- }
- ebp = (unsigned int)r.ebp;
- stack_depth = stack_level;
- stack_level = 0;
- if (ebp)
- _LOG(tfd, !at_fault, "stack: \n");
- while (ebp) {
- stack_ptr = cur_sp;
- while((int)(ebp - stack_ptr) >= 0) {
- stack_content = ptrace(PTRACE_PEEKTEXT, pid, (void*)stack_ptr, NULL);
- mi = pc_to_mapinfo(map, stack_content, &rel_pc);
-
- /* See if we can determine what symbol this stack frame resides in */
- if (mi != 0 && mi->symbols != 0) {
- sym = symbol_table_lookup(mi->symbols, rel_pc);
- }
- if (sym) {
- _LOG(tfd, !at_fault, " #%02d %08x %08x %s (%s)\n",
- stack_level, stack_ptr, stack_content, mi ? mi->name : "", sym->name);
- } else {
- _LOG(tfd, !at_fault, " #%02d %08x %08x %s\n",
- stack_level, stack_ptr, stack_content, mi ? mi->name : "");
- }
-
- stack_ptr = stack_ptr + 4;
- //the stack frame may be very deep.
- if((int)(stack_ptr - cur_sp) >= STACK_FRAME_DEPTH) {
- _LOG(tfd, !at_fault, " ...... ...... \n");
- break;
- }
- }
- cur_sp = ebp + 4;
- stack_level++;
- if (stack_level >= STACK_DEPTH || stack_level >= stack_depth)
- break;
- ebp = ptrace(PTRACE_PEEKTEXT, pid, (void*)ebp, NULL);
- }
-
- return stack_depth;
-}
-
diff --git a/debuggerd/x86/x86_utility.h b/debuggerd/x86/x86_utility.h
deleted file mode 100644
index ac6a885..0000000
--- a/debuggerd/x86/x86_utility.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
-**
-** Copyright 2006, 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.
-*/
-
-#define STACK_DEPTH 8
-#define STACK_FRAME_DEPTH 64
-
-typedef struct pt_regs_x86 {
- long ebx;
- long ecx;
- long edx;
- long esi;
- long edi;
- long ebp;
- long eax;
- int xds;
- int xes;
- int xfs;
- int xgs;
- long orig_eax;
- long eip;
- int xcs;
- long eflags;
- long esp;
- int xss;
-}pt_regs_x86;
-