Merge changes Iac3d757b,Ic31463d2,I27e95c1d,Ibd6e8769
* changes:
Revert "adb: Use new libusbhost library for USB support on Linux host."
Revert "adb: remove unnecessary include"
Revert "adb: Adjust usb_linux.c for changes in libusbhost API."
Revert "adb: avoid potential race conditions in detecting device disconnects"
diff --git a/debuggerd/Android.mk b/debuggerd/Android.mk
index 3c1cf02..ccc001b 100644
--- a/debuggerd/Android.mk
+++ b/debuggerd/Android.mk
@@ -5,7 +5,7 @@
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
-LOCAL_SRC_FILES:= debuggerd.c getevent.c unwind-arm.c pr-support.c utility.c
+LOCAL_SRC_FILES:= debuggerd.c getevent.c unwind-arm.c pr-support.c utility.c symbol_table.c
LOCAL_CFLAGS := -Wall
LOCAL_MODULE := debuggerd
diff --git a/debuggerd/debuggerd.c b/debuggerd/debuggerd.c
index e850a2e..3b2972a 100644
--- a/debuggerd/debuggerd.c
+++ b/debuggerd/debuggerd.c
@@ -63,7 +63,7 @@
/* Log information onto the tombstone */
void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
{
- char buf[128];
+ char buf[512];
va_list ap;
va_start(ap, fmt);
@@ -106,10 +106,11 @@
mi->start = strtoul(line, 0, 16);
mi->end = strtoul(line + 9, 0, 16);
- /* To be filled in parse_exidx_info if the mapped section starts with
+ /* 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;
strcpy(mi->name, line + 49);
@@ -353,7 +354,7 @@
if(sig) dump_fault_addr(tfd, tid, sig);
}
-static void parse_exidx_info(mapinfo *milist, pid_t pid)
+static void parse_elf_info(mapinfo *milist, pid_t pid)
{
mapinfo *mi;
for (mi = milist; mi != NULL; mi = mi->next) {
@@ -383,6 +384,9 @@
break;
}
}
+
+ /* Try to load symbols from this file */
+ mi->symbols = symbol_table_create(mi->name);
}
}
}
@@ -420,7 +424,7 @@
fclose(fp);
}
- parse_exidx_info(milist, tid);
+ parse_elf_info(milist, tid);
/* If stack unwinder fails, use the default solution to dump the stack
* content.
@@ -439,6 +443,7 @@
while(milist) {
mapinfo *next = milist->next;
+ symbol_table_free(milist->symbols);
free(milist);
milist = next;
}
diff --git a/debuggerd/symbol_table.c b/debuggerd/symbol_table.c
new file mode 100644
index 0000000..150c058
--- /dev/null
+++ b/debuggerd/symbol_table.c
@@ -0,0 +1,178 @@
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "symbol_table.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;
+
+ 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 dynsym_idx = -1;
+ int i;
+
+ for(i = 0; i < hdr->e_shnum; i++) {
+ if(shdr[i].sh_type == SHT_DYNSYM ) {
+ dynsym_idx = i;
+ }
+ }
+
+ if(dynsym_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->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++;
+ }
+ }
+
+ int dynstr_idx = shdr[dynsym_idx].sh_link;
+ char *dynstr = base + shdr[dynstr_idx].sh_offset;
+
+ // Now, create an entry in our symbol table structure for each symbol...
+ table->symbols = malloc(table->num_symbols * sizeof(struct symbol));
+ if(!table->symbols) {
+ free(table);
+ table = NULL;
+ 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++;
+ }
+ }
+
+ // 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
new file mode 100644
index 0000000..d9d2520
--- /dev/null
+++ b/debuggerd/symbol_table.h
@@ -0,0 +1,19 @@
+#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;
+};
+
+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/unwind-arm.c b/debuggerd/unwind-arm.c
index 9642d2e..b081161 100644
--- a/debuggerd/unwind-arm.c
+++ b/debuggerd/unwind-arm.c
@@ -37,6 +37,8 @@
#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);
@@ -393,6 +395,7 @@
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];
@@ -451,9 +454,20 @@
rel_pc = pc;
mi = pc_to_mapinfo(map, pc, &rel_pc);
- _LOG(tfd, only_in_tombstone,
- " #%02d pc %08x %s\n", stack_level, rel_pc,
- mi ? mi->name : "");
+ /* 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;
}
diff --git a/debuggerd/utility.h b/debuggerd/utility.h
index 49f5951..2ffdf56 100644
--- a/debuggerd/utility.h
+++ b/debuggerd/utility.h
@@ -21,6 +21,8 @@
#include <stddef.h>
#include <stdbool.h>
+#include "symbol_table.h"
+
#ifndef PT_ARM_EXIDX
#define PT_ARM_EXIDX 0x70000001 /* .ARM.exidx segment */
#endif
@@ -33,6 +35,7 @@
unsigned end;
unsigned exidx_start;
unsigned exidx_end;
+ struct symbol_table *symbols;
char name[];
} mapinfo;