debuggerd: IA version
Change-Id: I0c0d9c2d7e476b8d117aaf505a9480a47c0b5c05
Signed-off-by: Lei Li <lei.l.li@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk
index 244edb0..752c953 100644
--- a/debuggerd/Android.mk
+++ b/debuggerd/Android.mk
@@ -1,6 +1,6 @@
# Copyright 2005 The Android Open Source Project
-ifeq ($(TARGET_ARCH),arm)
+ifneq ($(filter arm x86,$(TARGET_ARCH)),)
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
@@ -50,4 +50,4 @@
include $(BUILD_EXECUTABLE)
endif # ARCH_ARM_HAVE_VFP == true
-endif # TARGET_ARCH == arm
+endif # arm or x86 in TARGET_ARCH
diff --git a/debuggerd/arm/unwind.c b/debuggerd/arm/unwind.c
index d191310..d9600b7 100644
--- a/debuggerd/arm/unwind.c
+++ b/debuggerd/arm/unwind.c
@@ -451,7 +451,6 @@
* 1MB boundaries, and the library may be larger than 1MB. So for .so
* addresses we print the relative offset in back trace.
*/
- rel_pc = pc;
mi = pc_to_mapinfo(map, pc, &rel_pc);
/* See if we can determine what symbol this stack frame resides in */
diff --git a/debuggerd/debuggerd.c b/debuggerd/debuggerd.c
index eda43cc..64b0bd5 100644
--- a/debuggerd/debuggerd.c
+++ b/debuggerd/debuggerd.c
@@ -240,6 +240,13 @@
}
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) {
diff --git a/debuggerd/debuggerd.h b/debuggerd/debuggerd.h
index 01736bd..e3cdc7c 100644
--- a/debuggerd/debuggerd.h
+++ b/debuggerd/debuggerd.h
@@ -37,4 +37,3 @@
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/symbol_table.c b/debuggerd/symbol_table.c
index 150c058..e76df33 100644
--- a/debuggerd/symbol_table.c
+++ b/debuggerd/symbol_table.c
@@ -5,6 +5,7 @@
#include <sys/mman.h>
#include "symbol_table.h"
+#include "utility.h"
#include <linux/elf.h>
@@ -49,6 +50,7 @@
int length;
char *base;
+ XLOG("Creating symbol table for %s\n", filename);
int fd = open(filename, O_RDONLY);
if(fd < 0) {
@@ -69,40 +71,70 @@
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) {
+ if ((dynsym_idx == -1) && (sym_idx == -1)) {
goto out_unmap;
}
- Elf32_Sym *dynsyms = (Elf32_Sym*)(base + shdr[dynsym_idx].sh_offset);
- int numsyms = shdr[dynsym_idx].sh_size / shdr[dynsym_idx].sh_entsize;
-
table = malloc(sizeof(struct symbol_table));
if(!table) {
goto out_unmap;
}
+ table->name = strdup(filename);
table->num_symbols = 0;
- // Iterate through the dynamic symbol table, and count how many symbols
- // are actually defined
- for(i = 0; i < numsyms; i++) {
- if(dynsyms[i].st_shndx != SHN_UNDEF) {
- table->num_symbols++;
- }
- }
+ Elf32_Sym *dynsyms = (Elf32_Sym*)(base + shdr[dynsym_idx].sh_offset);
+ Elf32_Sym *syms = (Elf32_Sym*)(base + shdr[sym_idx].sh_offset);
+
+ int dynnumsyms = shdr[dynsym_idx].sh_size / shdr[dynsym_idx].sh_entsize;
+ int numsyms = shdr[sym_idx].sh_size / shdr[sym_idx].sh_entsize;
int dynstr_idx = shdr[dynsym_idx].sh_link;
+ int str_idx = shdr[sym_idx].sh_link;
+
char *dynstr = base + shdr[dynstr_idx].sh_offset;
+ char *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++;
+ }
+ }
+ XLOG("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++;
+ }
+ }
+ XLOG("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);
@@ -110,14 +142,35 @@
goto out_unmap;
}
- // ...and populate them
+
int j = 0;
- for(i = 0; i < numsyms; 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;
- j++;
+ 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;
+ XLOG("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;
+ XLOG("name: %s, addr: %x, size: %x\n",
+ table->symbols[j].name, table->symbols[j].addr, table->symbols[j].size);
+ j++;
+ }
}
}
diff --git a/debuggerd/symbol_table.h b/debuggerd/symbol_table.h
index d9d2520..7f41f91 100644
--- a/debuggerd/symbol_table.h
+++ b/debuggerd/symbol_table.h
@@ -10,6 +10,7 @@
struct symbol_table {
struct symbol *symbols;
int num_symbols;
+ char *name;
};
struct symbol_table *symbol_table_create(const char *filename);
diff --git a/debuggerd/utility.c b/debuggerd/utility.c
index a9cbef7..2afdb46 100644
--- a/debuggerd/utility.c
+++ b/debuggerd/utility.c
@@ -69,11 +69,12 @@
/* 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 = pc - mi->start;
+ *rel_pc -= mi->start;
}
return mi;
}
diff --git a/debuggerd/x86/crashglue.S b/debuggerd/x86/crashglue.S
new file mode 100644
index 0000000..59df432
--- /dev/null
+++ b/debuggerd/x86/crashglue.S
@@ -0,0 +1,15 @@
+.globl crash1
+.globl crashnostack
+
+crash1:
+ movl $0xa5a50000, %eax
+ movl $0xa5a50001, %ebx
+ movl $0xa5a50002, %ecx
+
+ movl $0, %edx
+ jmp *%edx
+
+
+crashnostack:
+ movl $0, %ebp
+ jmp *%ebp
diff --git a/debuggerd/x86/machine.c b/debuggerd/x86/machine.c
new file mode 100644
index 0000000..9d418cf
--- /dev/null
+++ b/debuggerd/x86/machine.c
@@ -0,0 +1,61 @@
+/* system/debuggerd/debuggerd.c
+**
+** 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 <stdio.h>
+#include <errno.h>
+#include <signal.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <dirent.h>
+
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <sys/exec_elf.h>
+#include <sys/stat.h>
+
+#include <cutils/sockets.h>
+#include <cutils/properties.h>
+
+#include <linux/input.h>
+
+#include "../utility.h"
+#include "x86_utility.h"
+
+void dump_registers(int tfd, int 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));
+ return;
+ }
+//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",
+ r.eax, r.ebx, r.ecx, r.edx);
+ _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",
+ r.xcs, r.xds, r.xes, r.xfs, r.xss);
+ _LOG(tfd, only_in_tombstone,
+ " eip %08x ebp %08x esp %08x flags %08x\n",
+ r.eip, r.ebp, r.esp, r.eflags);
+}
diff --git a/debuggerd/x86/unwind.c b/debuggerd/x86/unwind.c
new file mode 100644
index 0000000..8f84e01
--- /dev/null
+++ b/debuggerd/x86/unwind.c
@@ -0,0 +1,85 @@
+#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) {
+ _LOG(tfd, !at_fault, "#0%d ",stack_level);
+ 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, " eip: %08x %s (%s)\n", eip, mi ? mi->name : "", sym->name);
+ } else {
+ _LOG(tfd, !at_fault, " eip: %08x %s\n", 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) {
+ _LOG(tfd, !at_fault, "#0%d \n",stack_level);
+ 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, " %08x %08x %s (%s)\n",
+ stack_ptr, stack_content, mi ? mi->name : "", sym->name);
+ } else {
+ _LOG(tfd, !at_fault, " %08x %08x %s\n", 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
new file mode 100644
index 0000000..ac6a885
--- /dev/null
+++ b/debuggerd/x86/x86_utility.h
@@ -0,0 +1,40 @@
+/*
+**
+** 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;
+