mirror of https://github.com/wolfpld/tracy.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1368 lines
36 KiB
C++
1368 lines
36 KiB
C++
/* elf.c -- Get debug data from a Mach-O file for backtraces.
|
|
Copyright (C) 2020-2021 Free Software Foundation, Inc.
|
|
Written by Ian Lance Taylor, Google.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
(1) Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
(2) Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the
|
|
distribution.
|
|
|
|
(3) The name of the author may not be used to
|
|
endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE. */
|
|
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_MACH_O_DYLD_H
|
|
#include <mach-o/dyld.h>
|
|
#endif
|
|
|
|
#include "backtrace.hpp"
|
|
#include "internal.hpp"
|
|
|
|
namespace tracy
|
|
{
|
|
|
|
/* Mach-O file header for a 32-bit executable. */
|
|
|
|
struct macho_header_32
|
|
{
|
|
uint32_t magic; /* Magic number (MACH_O_MAGIC_32) */
|
|
uint32_t cputype; /* CPU type */
|
|
uint32_t cpusubtype; /* CPU subtype */
|
|
uint32_t filetype; /* Type of file (object, executable) */
|
|
uint32_t ncmds; /* Number of load commands */
|
|
uint32_t sizeofcmds; /* Total size of load commands */
|
|
uint32_t flags; /* Flags for special features */
|
|
};
|
|
|
|
/* Mach-O file header for a 64-bit executable. */
|
|
|
|
struct macho_header_64
|
|
{
|
|
uint32_t magic; /* Magic number (MACH_O_MAGIC_64) */
|
|
uint32_t cputype; /* CPU type */
|
|
uint32_t cpusubtype; /* CPU subtype */
|
|
uint32_t filetype; /* Type of file (object, executable) */
|
|
uint32_t ncmds; /* Number of load commands */
|
|
uint32_t sizeofcmds; /* Total size of load commands */
|
|
uint32_t flags; /* Flags for special features */
|
|
uint32_t reserved; /* Reserved */
|
|
};
|
|
|
|
/* Mach-O file header for a fat executable. */
|
|
|
|
struct macho_header_fat
|
|
{
|
|
uint32_t magic; /* Magic number (MACH_O_MH_(MAGIC|CIGAM)_FAT(_64)?) */
|
|
uint32_t nfat_arch; /* Number of components */
|
|
};
|
|
|
|
/* Values for the header magic field. */
|
|
|
|
#define MACH_O_MH_MAGIC_32 0xfeedface
|
|
#define MACH_O_MH_MAGIC_64 0xfeedfacf
|
|
#define MACH_O_MH_MAGIC_FAT 0xcafebabe
|
|
#define MACH_O_MH_CIGAM_FAT 0xbebafeca
|
|
#define MACH_O_MH_MAGIC_FAT_64 0xcafebabf
|
|
#define MACH_O_MH_CIGAM_FAT_64 0xbfbafeca
|
|
|
|
/* Value for the header filetype field. */
|
|
|
|
#define MACH_O_MH_EXECUTE 0x02
|
|
#define MACH_O_MH_DYLIB 0x06
|
|
#define MACH_O_MH_DSYM 0x0a
|
|
|
|
/* A component of a fat file. A fat file starts with a
|
|
macho_header_fat followed by nfat_arch instances of this
|
|
struct. */
|
|
|
|
struct macho_fat_arch
|
|
{
|
|
uint32_t cputype; /* CPU type */
|
|
uint32_t cpusubtype; /* CPU subtype */
|
|
uint32_t offset; /* File offset of this entry */
|
|
uint32_t size; /* Size of this entry */
|
|
uint32_t align; /* Alignment of this entry */
|
|
};
|
|
|
|
/* A component of a 64-bit fat file. This is used if the magic field
|
|
is MAGIC_FAT_64. This is only used when some file size or file
|
|
offset is too large to represent in the 32-bit format. */
|
|
|
|
struct macho_fat_arch_64
|
|
{
|
|
uint32_t cputype; /* CPU type */
|
|
uint32_t cpusubtype; /* CPU subtype */
|
|
uint64_t offset; /* File offset of this entry */
|
|
uint64_t size; /* Size of this entry */
|
|
uint32_t align; /* Alignment of this entry */
|
|
uint32_t reserved; /* Reserved */
|
|
};
|
|
|
|
/* Values for the fat_arch cputype field (and the header cputype
|
|
field). */
|
|
|
|
#define MACH_O_CPU_ARCH_ABI64 0x01000000
|
|
|
|
#define MACH_O_CPU_TYPE_X86 7
|
|
#define MACH_O_CPU_TYPE_ARM 12
|
|
#define MACH_O_CPU_TYPE_PPC 18
|
|
|
|
#define MACH_O_CPU_TYPE_X86_64 (MACH_O_CPU_TYPE_X86 | MACH_O_CPU_ARCH_ABI64)
|
|
#define MACH_O_CPU_TYPE_ARM64 (MACH_O_CPU_TYPE_ARM | MACH_O_CPU_ARCH_ABI64)
|
|
#define MACH_O_CPU_TYPE_PPC64 (MACH_O_CPU_TYPE_PPC | MACH_O_CPU_ARCH_ABI64)
|
|
|
|
/* The header of a load command. */
|
|
|
|
struct macho_load_command
|
|
{
|
|
uint32_t cmd; /* The type of load command */
|
|
uint32_t cmdsize; /* Size in bytes of the entire command */
|
|
};
|
|
|
|
/* Values for the load_command cmd field. */
|
|
|
|
#define MACH_O_LC_SEGMENT 0x01
|
|
#define MACH_O_LC_SYMTAB 0x02
|
|
#define MACH_O_LC_SEGMENT_64 0x19
|
|
#define MACH_O_LC_UUID 0x1b
|
|
|
|
/* The length of a section of segment name. */
|
|
|
|
#define MACH_O_NAMELEN (16)
|
|
|
|
/* LC_SEGMENT load command. */
|
|
|
|
struct macho_segment_command
|
|
{
|
|
uint32_t cmd; /* The type of load command (LC_SEGMENT) */
|
|
uint32_t cmdsize; /* Size in bytes of the entire command */
|
|
char segname[MACH_O_NAMELEN]; /* Segment name */
|
|
uint32_t vmaddr; /* Virtual memory address */
|
|
uint32_t vmsize; /* Virtual memory size */
|
|
uint32_t fileoff; /* Offset of data to be mapped */
|
|
uint32_t filesize; /* Size of data in file */
|
|
uint32_t maxprot; /* Maximum permitted virtual protection */
|
|
uint32_t initprot; /* Initial virtual memory protection */
|
|
uint32_t nsects; /* Number of sections in this segment */
|
|
uint32_t flags; /* Flags */
|
|
};
|
|
|
|
/* LC_SEGMENT_64 load command. */
|
|
|
|
struct macho_segment_64_command
|
|
{
|
|
uint32_t cmd; /* The type of load command (LC_SEGMENT) */
|
|
uint32_t cmdsize; /* Size in bytes of the entire command */
|
|
char segname[MACH_O_NAMELEN]; /* Segment name */
|
|
uint64_t vmaddr; /* Virtual memory address */
|
|
uint64_t vmsize; /* Virtual memory size */
|
|
uint64_t fileoff; /* Offset of data to be mapped */
|
|
uint64_t filesize; /* Size of data in file */
|
|
uint32_t maxprot; /* Maximum permitted virtual protection */
|
|
uint32_t initprot; /* Initial virtual memory protection */
|
|
uint32_t nsects; /* Number of sections in this segment */
|
|
uint32_t flags; /* Flags */
|
|
};
|
|
|
|
/* LC_SYMTAB load command. */
|
|
|
|
struct macho_symtab_command
|
|
{
|
|
uint32_t cmd; /* The type of load command (LC_SEGMENT) */
|
|
uint32_t cmdsize; /* Size in bytes of the entire command */
|
|
uint32_t symoff; /* File offset of symbol table */
|
|
uint32_t nsyms; /* Number of symbols */
|
|
uint32_t stroff; /* File offset of string table */
|
|
uint32_t strsize; /* String table size */
|
|
};
|
|
|
|
/* The length of a Mach-O uuid. */
|
|
|
|
#define MACH_O_UUID_LEN (16)
|
|
|
|
/* LC_UUID load command. */
|
|
|
|
struct macho_uuid_command
|
|
{
|
|
uint32_t cmd; /* Type of load command (LC_UUID) */
|
|
uint32_t cmdsize; /* Size in bytes of command */
|
|
unsigned char uuid[MACH_O_UUID_LEN]; /* UUID */
|
|
};
|
|
|
|
/* 32-bit section header within a LC_SEGMENT segment. */
|
|
|
|
struct macho_section
|
|
{
|
|
char sectname[MACH_O_NAMELEN]; /* Section name */
|
|
char segment[MACH_O_NAMELEN]; /* Segment of this section */
|
|
uint32_t addr; /* Address in memory */
|
|
uint32_t size; /* Section size */
|
|
uint32_t offset; /* File offset */
|
|
uint32_t align; /* Log2 of section alignment */
|
|
uint32_t reloff; /* File offset of relocations */
|
|
uint32_t nreloc; /* Number of relocs for this section */
|
|
uint32_t flags; /* Flags */
|
|
uint32_t reserved1;
|
|
uint32_t reserved2;
|
|
};
|
|
|
|
/* 64-bit section header within a LC_SEGMENT_64 segment. */
|
|
|
|
struct macho_section_64
|
|
{
|
|
char sectname[MACH_O_NAMELEN]; /* Section name */
|
|
char segment[MACH_O_NAMELEN]; /* Segment of this section */
|
|
uint64_t addr; /* Address in memory */
|
|
uint64_t size; /* Section size */
|
|
uint32_t offset; /* File offset */
|
|
uint32_t align; /* Log2 of section alignment */
|
|
uint32_t reloff; /* File offset of section relocations */
|
|
uint32_t nreloc; /* Number of relocs for this section */
|
|
uint32_t flags; /* Flags */
|
|
uint32_t reserved1;
|
|
uint32_t reserved2;
|
|
uint32_t reserved3;
|
|
};
|
|
|
|
/* 32-bit symbol data. */
|
|
|
|
struct macho_nlist
|
|
{
|
|
uint32_t n_strx; /* Index of name in string table */
|
|
uint8_t n_type; /* Type flag */
|
|
uint8_t n_sect; /* Section number */
|
|
uint16_t n_desc; /* Stabs description field */
|
|
uint32_t n_value; /* Value */
|
|
};
|
|
|
|
/* 64-bit symbol data. */
|
|
|
|
struct macho_nlist_64
|
|
{
|
|
uint32_t n_strx; /* Index of name in string table */
|
|
uint8_t n_type; /* Type flag */
|
|
uint8_t n_sect; /* Section number */
|
|
uint16_t n_desc; /* Stabs description field */
|
|
uint64_t n_value; /* Value */
|
|
};
|
|
|
|
/* Value found in nlist n_type field. */
|
|
|
|
#define MACH_O_N_STAB 0xe0 /* Stabs debugging symbol */
|
|
#define MACH_O_N_TYPE 0x0e /* Mask for type bits */
|
|
|
|
/* Values found after masking with MACH_O_N_TYPE. */
|
|
#define MACH_O_N_UNDF 0x00 /* Undefined symbol */
|
|
#define MACH_O_N_ABS 0x02 /* Absolute symbol */
|
|
#define MACH_O_N_SECT 0x0e /* Defined in section from n_sect field */
|
|
|
|
|
|
/* Information we keep for a Mach-O symbol. */
|
|
|
|
struct macho_symbol
|
|
{
|
|
const char *name; /* Symbol name */
|
|
uintptr_t address; /* Symbol address */
|
|
};
|
|
|
|
/* Information to pass to macho_syminfo. */
|
|
|
|
struct macho_syminfo_data
|
|
{
|
|
struct macho_syminfo_data *next; /* Next module */
|
|
struct macho_symbol *symbols; /* Symbols sorted by address */
|
|
size_t count; /* Number of symbols */
|
|
};
|
|
|
|
/* Names of sections, indexed by enum dwarf_section in internal.h. */
|
|
|
|
static const char * const dwarf_section_names[DEBUG_MAX] =
|
|
{
|
|
"__debug_info",
|
|
"__debug_line",
|
|
"__debug_abbrev",
|
|
"__debug_ranges",
|
|
"__debug_str",
|
|
"", /* DEBUG_ADDR */
|
|
"__debug_str_offs",
|
|
"", /* DEBUG_LINE_STR */
|
|
"__debug_rnglists"
|
|
};
|
|
|
|
/* Forward declaration. */
|
|
|
|
static int macho_add (struct backtrace_state *, const char *, int, off_t,
|
|
const unsigned char *, struct libbacktrace_base_address,
|
|
int, backtrace_error_callback, void *, fileline *,
|
|
int *);
|
|
|
|
/* A dummy callback function used when we can't find any debug info. */
|
|
|
|
static int
|
|
macho_nodebug (struct backtrace_state *state ATTRIBUTE_UNUSED,
|
|
uintptr_t pc ATTRIBUTE_UNUSED,
|
|
backtrace_full_callback callback ATTRIBUTE_UNUSED,
|
|
backtrace_error_callback error_callback, void *data)
|
|
{
|
|
error_callback (data, "no debug info in Mach-O executable", -1);
|
|
return 0;
|
|
}
|
|
|
|
/* A dummy callback function used when we can't find a symbol
|
|
table. */
|
|
|
|
static void
|
|
macho_nosyms (struct backtrace_state *state ATTRIBUTE_UNUSED,
|
|
uintptr_t addr ATTRIBUTE_UNUSED,
|
|
backtrace_syminfo_callback callback ATTRIBUTE_UNUSED,
|
|
backtrace_error_callback error_callback, void *data)
|
|
{
|
|
error_callback (data, "no symbol table in Mach-O executable", -1);
|
|
}
|
|
|
|
/* Add a single DWARF section to DWARF_SECTIONS, if we need the
|
|
section. Returns 1 on success, 0 on failure. */
|
|
|
|
static int
|
|
macho_add_dwarf_section (struct backtrace_state *state, int descriptor,
|
|
const char *sectname, uint32_t offset, uint64_t size,
|
|
backtrace_error_callback error_callback, void *data,
|
|
struct dwarf_sections *dwarf_sections)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < (int) DEBUG_MAX; ++i)
|
|
{
|
|
if (dwarf_section_names[i][0] != '\0'
|
|
&& strncmp (sectname, dwarf_section_names[i], MACH_O_NAMELEN) == 0)
|
|
{
|
|
struct backtrace_view section_view;
|
|
|
|
/* FIXME: Perhaps it would be better to try to use a single
|
|
view to read all the DWARF data, as we try to do for
|
|
ELF. */
|
|
|
|
if (!backtrace_get_view (state, descriptor, offset, size,
|
|
error_callback, data, §ion_view))
|
|
return 0;
|
|
dwarf_sections->data[i] = (const unsigned char *) section_view.data;
|
|
dwarf_sections->size[i] = size;
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Collect DWARF sections from a DWARF segment. Returns 1 on success,
|
|
0 on failure. */
|
|
|
|
static int
|
|
macho_add_dwarf_segment (struct backtrace_state *state, int descriptor,
|
|
off_t offset, unsigned int cmd, const char *psecs,
|
|
size_t sizesecs, unsigned int nsects,
|
|
backtrace_error_callback error_callback, void *data,
|
|
struct dwarf_sections *dwarf_sections)
|
|
{
|
|
size_t sec_header_size;
|
|
size_t secoffset;
|
|
unsigned int i;
|
|
|
|
switch (cmd)
|
|
{
|
|
case MACH_O_LC_SEGMENT:
|
|
sec_header_size = sizeof (struct macho_section);
|
|
break;
|
|
case MACH_O_LC_SEGMENT_64:
|
|
sec_header_size = sizeof (struct macho_section_64);
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
secoffset = 0;
|
|
for (i = 0; i < nsects; ++i)
|
|
{
|
|
if (secoffset + sec_header_size > sizesecs)
|
|
{
|
|
error_callback (data, "section overflow withing segment", 0);
|
|
return 0;
|
|
}
|
|
|
|
switch (cmd)
|
|
{
|
|
case MACH_O_LC_SEGMENT:
|
|
{
|
|
struct macho_section section;
|
|
|
|
memcpy (§ion, psecs + secoffset, sizeof section);
|
|
macho_add_dwarf_section (state, descriptor, section.sectname,
|
|
offset + section.offset, section.size,
|
|
error_callback, data, dwarf_sections);
|
|
}
|
|
break;
|
|
|
|
case MACH_O_LC_SEGMENT_64:
|
|
{
|
|
struct macho_section_64 section;
|
|
|
|
memcpy (§ion, psecs + secoffset, sizeof section);
|
|
macho_add_dwarf_section (state, descriptor, section.sectname,
|
|
offset + section.offset, section.size,
|
|
error_callback, data, dwarf_sections);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
secoffset += sec_header_size;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Compare struct macho_symbol for qsort. */
|
|
|
|
static int
|
|
macho_symbol_compare (const void *v1, const void *v2)
|
|
{
|
|
const struct macho_symbol *m1 = (const struct macho_symbol *) v1;
|
|
const struct macho_symbol *m2 = (const struct macho_symbol *) v2;
|
|
|
|
if (m1->address < m2->address)
|
|
return -1;
|
|
else if (m1->address > m2->address)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Compare an address against a macho_symbol for bsearch. We allocate
|
|
one extra entry in the array so that this can safely look at the
|
|
next entry. */
|
|
|
|
static int
|
|
macho_symbol_search (const void *vkey, const void *ventry)
|
|
{
|
|
const uintptr_t *key = (const uintptr_t *) vkey;
|
|
const struct macho_symbol *entry = (const struct macho_symbol *) ventry;
|
|
uintptr_t addr;
|
|
|
|
addr = *key;
|
|
if (addr < entry->address)
|
|
return -1;
|
|
else if (entry->name[0] == '\0'
|
|
&& entry->address == ~(uintptr_t) 0)
|
|
return -1;
|
|
else if ((entry + 1)->name[0] == '\0'
|
|
&& (entry + 1)->address == ~(uintptr_t) 0)
|
|
return -1;
|
|
else if (addr >= (entry + 1)->address)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Return whether the symbol type field indicates a symbol table entry
|
|
that we care about: a function or data symbol. */
|
|
|
|
static int
|
|
macho_defined_symbol (uint8_t type)
|
|
{
|
|
if ((type & MACH_O_N_STAB) != 0)
|
|
return 0;
|
|
switch (type & MACH_O_N_TYPE)
|
|
{
|
|
case MACH_O_N_UNDF:
|
|
return 0;
|
|
case MACH_O_N_ABS:
|
|
return 1;
|
|
case MACH_O_N_SECT:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Add symbol table information for a Mach-O file. */
|
|
|
|
static int
|
|
macho_add_symtab (struct backtrace_state *state, int descriptor,
|
|
struct libbacktrace_base_address base_address, int is_64,
|
|
off_t symoff, unsigned int nsyms, off_t stroff,
|
|
unsigned int strsize,
|
|
backtrace_error_callback error_callback, void *data)
|
|
{
|
|
size_t symsize;
|
|
struct backtrace_view sym_view;
|
|
int sym_view_valid;
|
|
struct backtrace_view str_view;
|
|
int str_view_valid;
|
|
size_t ndefs;
|
|
size_t symtaboff;
|
|
unsigned int i;
|
|
size_t macho_symbol_size;
|
|
struct macho_symbol *macho_symbols;
|
|
unsigned int j;
|
|
struct macho_syminfo_data *sdata;
|
|
|
|
sym_view_valid = 0;
|
|
str_view_valid = 0;
|
|
macho_symbol_size = 0;
|
|
macho_symbols = NULL;
|
|
|
|
if (is_64)
|
|
symsize = sizeof (struct macho_nlist_64);
|
|
else
|
|
symsize = sizeof (struct macho_nlist);
|
|
|
|
if (!backtrace_get_view (state, descriptor, symoff, nsyms * symsize,
|
|
error_callback, data, &sym_view))
|
|
goto fail;
|
|
sym_view_valid = 1;
|
|
|
|
if (!backtrace_get_view (state, descriptor, stroff, strsize,
|
|
error_callback, data, &str_view))
|
|
return 0;
|
|
str_view_valid = 1;
|
|
|
|
ndefs = 0;
|
|
symtaboff = 0;
|
|
for (i = 0; i < nsyms; ++i, symtaboff += symsize)
|
|
{
|
|
if (is_64)
|
|
{
|
|
struct macho_nlist_64 nlist;
|
|
|
|
memcpy (&nlist, (const char *) sym_view.data + symtaboff,
|
|
sizeof nlist);
|
|
if (macho_defined_symbol (nlist.n_type))
|
|
++ndefs;
|
|
}
|
|
else
|
|
{
|
|
struct macho_nlist nlist;
|
|
|
|
memcpy (&nlist, (const char *) sym_view.data + symtaboff,
|
|
sizeof nlist);
|
|
if (macho_defined_symbol (nlist.n_type))
|
|
++ndefs;
|
|
}
|
|
}
|
|
|
|
/* Add 1 to ndefs to make room for a sentinel. */
|
|
macho_symbol_size = (ndefs + 1) * sizeof (struct macho_symbol);
|
|
macho_symbols = ((struct macho_symbol *)
|
|
backtrace_alloc (state, macho_symbol_size, error_callback,
|
|
data));
|
|
if (macho_symbols == NULL)
|
|
goto fail;
|
|
|
|
j = 0;
|
|
symtaboff = 0;
|
|
for (i = 0; i < nsyms; ++i, symtaboff += symsize)
|
|
{
|
|
uint32_t strx;
|
|
uint64_t value;
|
|
const char *name;
|
|
|
|
strx = 0;
|
|
value = 0;
|
|
if (is_64)
|
|
{
|
|
struct macho_nlist_64 nlist;
|
|
|
|
memcpy (&nlist, (const char *) sym_view.data + symtaboff,
|
|
sizeof nlist);
|
|
if (!macho_defined_symbol (nlist.n_type))
|
|
continue;
|
|
|
|
strx = nlist.n_strx;
|
|
value = nlist.n_value;
|
|
}
|
|
else
|
|
{
|
|
struct macho_nlist nlist;
|
|
|
|
memcpy (&nlist, (const char *) sym_view.data + symtaboff,
|
|
sizeof nlist);
|
|
if (!macho_defined_symbol (nlist.n_type))
|
|
continue;
|
|
|
|
strx = nlist.n_strx;
|
|
value = nlist.n_value;
|
|
}
|
|
|
|
if (strx >= strsize)
|
|
{
|
|
error_callback (data, "symbol string index out of range", 0);
|
|
goto fail;
|
|
}
|
|
|
|
name = (const char *) str_view.data + strx;
|
|
if (name[0] == '_')
|
|
++name;
|
|
macho_symbols[j].name = name;
|
|
macho_symbols[j].address = libbacktrace_add_base (value, base_address);
|
|
++j;
|
|
}
|
|
|
|
sdata = ((struct macho_syminfo_data *)
|
|
backtrace_alloc (state, sizeof *sdata, error_callback, data));
|
|
if (sdata == NULL)
|
|
goto fail;
|
|
|
|
/* We need to keep the string table since it holds the names, but we
|
|
can release the symbol table. */
|
|
|
|
backtrace_release_view (state, &sym_view, error_callback, data);
|
|
sym_view_valid = 0;
|
|
str_view_valid = 0;
|
|
|
|
/* Add a trailing sentinel symbol. */
|
|
macho_symbols[j].name = "";
|
|
macho_symbols[j].address = ~(uintptr_t) 0;
|
|
|
|
backtrace_qsort (macho_symbols, ndefs + 1, sizeof (struct macho_symbol),
|
|
macho_symbol_compare);
|
|
|
|
sdata->next = NULL;
|
|
sdata->symbols = macho_symbols;
|
|
sdata->count = ndefs;
|
|
|
|
if (!state->threaded)
|
|
{
|
|
struct macho_syminfo_data **pp;
|
|
|
|
for (pp = (struct macho_syminfo_data **) (void *) &state->syminfo_data;
|
|
*pp != NULL;
|
|
pp = &(*pp)->next)
|
|
;
|
|
*pp = sdata;
|
|
}
|
|
else
|
|
{
|
|
while (1)
|
|
{
|
|
struct macho_syminfo_data **pp;
|
|
|
|
pp = (struct macho_syminfo_data **) (void *) &state->syminfo_data;
|
|
|
|
while (1)
|
|
{
|
|
struct macho_syminfo_data *p;
|
|
|
|
p = backtrace_atomic_load_pointer (pp);
|
|
|
|
if (p == NULL)
|
|
break;
|
|
|
|
pp = &p->next;
|
|
}
|
|
|
|
if (__sync_bool_compare_and_swap (pp, NULL, sdata))
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
|
|
fail:
|
|
if (macho_symbols != NULL)
|
|
backtrace_free (state, macho_symbols, macho_symbol_size,
|
|
error_callback, data);
|
|
if (sym_view_valid)
|
|
backtrace_release_view (state, &sym_view, error_callback, data);
|
|
if (str_view_valid)
|
|
backtrace_release_view (state, &str_view, error_callback, data);
|
|
return 0;
|
|
}
|
|
|
|
/* Return the symbol name and value for an ADDR. */
|
|
|
|
static void
|
|
macho_syminfo (struct backtrace_state *state, uintptr_t addr,
|
|
backtrace_syminfo_callback callback,
|
|
backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
|
|
void *data)
|
|
{
|
|
struct macho_syminfo_data *sdata;
|
|
struct macho_symbol *sym;
|
|
|
|
sym = NULL;
|
|
if (!state->threaded)
|
|
{
|
|
for (sdata = (struct macho_syminfo_data *) state->syminfo_data;
|
|
sdata != NULL;
|
|
sdata = sdata->next)
|
|
{
|
|
sym = ((struct macho_symbol *)
|
|
bsearch (&addr, sdata->symbols, sdata->count,
|
|
sizeof (struct macho_symbol), macho_symbol_search));
|
|
if (sym != NULL)
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct macho_syminfo_data **pp;
|
|
|
|
pp = (struct macho_syminfo_data **) (void *) &state->syminfo_data;
|
|
while (1)
|
|
{
|
|
sdata = backtrace_atomic_load_pointer (pp);
|
|
if (sdata == NULL)
|
|
break;
|
|
|
|
sym = ((struct macho_symbol *)
|
|
bsearch (&addr, sdata->symbols, sdata->count,
|
|
sizeof (struct macho_symbol), macho_symbol_search));
|
|
if (sym != NULL)
|
|
break;
|
|
|
|
pp = &sdata->next;
|
|
}
|
|
}
|
|
|
|
if (sym == NULL)
|
|
callback (data, addr, NULL, 0, 0);
|
|
else
|
|
callback (data, addr, sym->name, sym->address, 0);
|
|
}
|
|
|
|
/* Look through a fat file to find the relevant executable. Returns 1
|
|
on success, 0 on failure (in both cases descriptor is closed). */
|
|
|
|
static int
|
|
macho_add_fat (struct backtrace_state *state, const char *filename,
|
|
int descriptor, int swapped, off_t offset,
|
|
const unsigned char *match_uuid,
|
|
struct libbacktrace_base_address base_address,
|
|
int skip_symtab, uint32_t nfat_arch, int is_64,
|
|
backtrace_error_callback error_callback, void *data,
|
|
fileline *fileline_fn, int *found_sym)
|
|
{
|
|
int arch_view_valid;
|
|
unsigned int cputype;
|
|
size_t arch_size;
|
|
struct backtrace_view arch_view;
|
|
unsigned int i;
|
|
|
|
arch_view_valid = 0;
|
|
|
|
#if defined (__x86_64__)
|
|
cputype = MACH_O_CPU_TYPE_X86_64;
|
|
#elif defined (__i386__)
|
|
cputype = MACH_O_CPU_TYPE_X86;
|
|
#elif defined (__aarch64__)
|
|
cputype = MACH_O_CPU_TYPE_ARM64;
|
|
#elif defined (__arm__)
|
|
cputype = MACH_O_CPU_TYPE_ARM;
|
|
#elif defined (__ppc__)
|
|
cputype = MACH_O_CPU_TYPE_PPC;
|
|
#elif defined (__ppc64__)
|
|
cputype = MACH_O_CPU_TYPE_PPC64;
|
|
#else
|
|
error_callback (data, "unknown Mach-O architecture", 0);
|
|
goto fail;
|
|
#endif
|
|
|
|
if (is_64)
|
|
arch_size = sizeof (struct macho_fat_arch_64);
|
|
else
|
|
arch_size = sizeof (struct macho_fat_arch);
|
|
|
|
if (!backtrace_get_view (state, descriptor, offset,
|
|
nfat_arch * arch_size,
|
|
error_callback, data, &arch_view))
|
|
goto fail;
|
|
|
|
for (i = 0; i < nfat_arch; ++i)
|
|
{
|
|
uint32_t fcputype;
|
|
uint64_t foffset;
|
|
|
|
if (is_64)
|
|
{
|
|
struct macho_fat_arch_64 fat_arch_64;
|
|
|
|
memcpy (&fat_arch_64,
|
|
(const char *) arch_view.data + i * arch_size,
|
|
arch_size);
|
|
fcputype = fat_arch_64.cputype;
|
|
foffset = fat_arch_64.offset;
|
|
if (swapped)
|
|
{
|
|
fcputype = __builtin_bswap32 (fcputype);
|
|
foffset = __builtin_bswap64 (foffset);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct macho_fat_arch fat_arch_32;
|
|
|
|
memcpy (&fat_arch_32,
|
|
(const char *) arch_view.data + i * arch_size,
|
|
arch_size);
|
|
fcputype = fat_arch_32.cputype;
|
|
foffset = (uint64_t) fat_arch_32.offset;
|
|
if (swapped)
|
|
{
|
|
fcputype = __builtin_bswap32 (fcputype);
|
|
foffset = (uint64_t) __builtin_bswap32 ((uint32_t) foffset);
|
|
}
|
|
}
|
|
|
|
if (fcputype == cputype)
|
|
{
|
|
/* FIXME: What about cpusubtype? */
|
|
backtrace_release_view (state, &arch_view, error_callback, data);
|
|
return macho_add (state, filename, descriptor, foffset, match_uuid,
|
|
base_address, skip_symtab, error_callback, data,
|
|
fileline_fn, found_sym);
|
|
}
|
|
}
|
|
|
|
error_callback (data, "could not find executable in fat file", 0);
|
|
|
|
fail:
|
|
if (arch_view_valid)
|
|
backtrace_release_view (state, &arch_view, error_callback, data);
|
|
if (descriptor != -1)
|
|
backtrace_close (descriptor, error_callback, data);
|
|
return 0;
|
|
}
|
|
|
|
/* Look for the dsym file for FILENAME. This is called if FILENAME
|
|
does not have debug info or a symbol table. Returns 1 on success,
|
|
0 on failure. */
|
|
|
|
static int
|
|
macho_add_dsym (struct backtrace_state *state, const char *filename,
|
|
struct libbacktrace_base_address base_address,
|
|
const unsigned char *uuid,
|
|
backtrace_error_callback error_callback, void *data,
|
|
fileline* fileline_fn)
|
|
{
|
|
const char *p;
|
|
const char *dirname;
|
|
char *diralc;
|
|
size_t dirnamelen;
|
|
const char *basename;
|
|
size_t basenamelen;
|
|
const char *dsymsuffixdir;
|
|
size_t dsymsuffixdirlen;
|
|
size_t dsymlen;
|
|
char *dsym;
|
|
char *ps;
|
|
int d;
|
|
int does_not_exist;
|
|
int dummy_found_sym;
|
|
|
|
diralc = NULL;
|
|
dirnamelen = 0;
|
|
dsym = NULL;
|
|
dsymlen = 0;
|
|
|
|
p = strrchr (filename, '/');
|
|
if (p == NULL)
|
|
{
|
|
dirname = ".";
|
|
dirnamelen = 1;
|
|
basename = filename;
|
|
basenamelen = strlen (basename);
|
|
diralc = NULL;
|
|
}
|
|
else
|
|
{
|
|
dirnamelen = p - filename;
|
|
diralc = (char*)backtrace_alloc (state, dirnamelen + 1, error_callback, data);
|
|
if (diralc == NULL)
|
|
goto fail;
|
|
memcpy (diralc, filename, dirnamelen);
|
|
diralc[dirnamelen] = '\0';
|
|
dirname = diralc;
|
|
basename = p + 1;
|
|
basenamelen = strlen (basename);
|
|
}
|
|
|
|
dsymsuffixdir = ".dSYM/Contents/Resources/DWARF/";
|
|
dsymsuffixdirlen = strlen (dsymsuffixdir);
|
|
|
|
dsymlen = (dirnamelen
|
|
+ 1
|
|
+ basenamelen
|
|
+ dsymsuffixdirlen
|
|
+ basenamelen
|
|
+ 1);
|
|
dsym = (char*)backtrace_alloc (state, dsymlen, error_callback, data);
|
|
if (dsym == NULL)
|
|
goto fail;
|
|
|
|
ps = dsym;
|
|
memcpy (ps, dirname, dirnamelen);
|
|
ps += dirnamelen;
|
|
*ps++ = '/';
|
|
memcpy (ps, basename, basenamelen);
|
|
ps += basenamelen;
|
|
memcpy (ps, dsymsuffixdir, dsymsuffixdirlen);
|
|
ps += dsymsuffixdirlen;
|
|
memcpy (ps, basename, basenamelen);
|
|
ps += basenamelen;
|
|
*ps = '\0';
|
|
|
|
if (diralc != NULL)
|
|
{
|
|
backtrace_free (state, diralc, dirnamelen + 1, error_callback, data);
|
|
diralc = NULL;
|
|
}
|
|
|
|
d = backtrace_open (dsym, error_callback, data, &does_not_exist);
|
|
if (d < 0)
|
|
{
|
|
/* The file does not exist, so we can't read the debug info.
|
|
Just return success. */
|
|
backtrace_free (state, dsym, dsymlen, error_callback, data);
|
|
return 1;
|
|
}
|
|
|
|
if (!macho_add (state, dsym, d, 0, uuid, base_address, 1,
|
|
error_callback, data, fileline_fn, &dummy_found_sym))
|
|
goto fail;
|
|
|
|
backtrace_free (state, dsym, dsymlen, error_callback, data);
|
|
|
|
return 1;
|
|
|
|
fail:
|
|
if (dsym != NULL)
|
|
backtrace_free (state, dsym, dsymlen, error_callback, data);
|
|
if (diralc != NULL)
|
|
backtrace_free (state, diralc, dirnamelen, error_callback, data);
|
|
return 0;
|
|
}
|
|
|
|
/* Add the backtrace data for a Macho-O file. Returns 1 on success, 0
|
|
on failure (in both cases descriptor is closed).
|
|
|
|
FILENAME: the name of the executable.
|
|
DESCRIPTOR: an open descriptor for the executable, closed here.
|
|
OFFSET: the offset within the file of this executable, for fat files.
|
|
MATCH_UUID: if not NULL, UUID that must match.
|
|
BASE_ADDRESS: the load address of the executable.
|
|
SKIP_SYMTAB: if non-zero, ignore the symbol table; used for dSYM files.
|
|
FILELINE_FN: set to the fileline function, by backtrace_dwarf_add.
|
|
FOUND_SYM: set to non-zero if we found the symbol table.
|
|
*/
|
|
|
|
static int
|
|
macho_add (struct backtrace_state *state, const char *filename, int descriptor,
|
|
off_t offset, const unsigned char *match_uuid,
|
|
struct libbacktrace_base_address base_address, int skip_symtab,
|
|
backtrace_error_callback error_callback, void *data,
|
|
fileline *fileline_fn, int *found_sym)
|
|
{
|
|
struct backtrace_view header_view;
|
|
struct macho_header_32 header;
|
|
off_t hdroffset;
|
|
int is_64;
|
|
struct backtrace_view cmds_view;
|
|
int cmds_view_valid;
|
|
struct dwarf_sections dwarf_sections;
|
|
int have_dwarf;
|
|
unsigned char uuid[MACH_O_UUID_LEN];
|
|
int have_uuid;
|
|
size_t cmdoffset;
|
|
unsigned int i;
|
|
|
|
*found_sym = 0;
|
|
|
|
cmds_view_valid = 0;
|
|
|
|
/* The 32-bit and 64-bit file headers start out the same, so we can
|
|
just always read the 32-bit version. A fat header is shorter but
|
|
it will always be followed by data, so it's OK to read extra. */
|
|
|
|
if (!backtrace_get_view (state, descriptor, offset,
|
|
sizeof (struct macho_header_32),
|
|
error_callback, data, &header_view))
|
|
goto fail;
|
|
|
|
memcpy (&header, header_view.data, sizeof header);
|
|
|
|
backtrace_release_view (state, &header_view, error_callback, data);
|
|
|
|
switch (header.magic)
|
|
{
|
|
case MACH_O_MH_MAGIC_32:
|
|
is_64 = 0;
|
|
hdroffset = offset + sizeof (struct macho_header_32);
|
|
break;
|
|
case MACH_O_MH_MAGIC_64:
|
|
is_64 = 1;
|
|
hdroffset = offset + sizeof (struct macho_header_64);
|
|
break;
|
|
case MACH_O_MH_MAGIC_FAT:
|
|
case MACH_O_MH_MAGIC_FAT_64:
|
|
{
|
|
struct macho_header_fat fat_header;
|
|
|
|
hdroffset = offset + sizeof (struct macho_header_fat);
|
|
memcpy (&fat_header, &header, sizeof fat_header);
|
|
return macho_add_fat (state, filename, descriptor, 0, hdroffset,
|
|
match_uuid, base_address, skip_symtab,
|
|
fat_header.nfat_arch,
|
|
header.magic == MACH_O_MH_MAGIC_FAT_64,
|
|
error_callback, data, fileline_fn, found_sym);
|
|
}
|
|
case MACH_O_MH_CIGAM_FAT:
|
|
case MACH_O_MH_CIGAM_FAT_64:
|
|
{
|
|
struct macho_header_fat fat_header;
|
|
uint32_t nfat_arch;
|
|
|
|
hdroffset = offset + sizeof (struct macho_header_fat);
|
|
memcpy (&fat_header, &header, sizeof fat_header);
|
|
nfat_arch = __builtin_bswap32 (fat_header.nfat_arch);
|
|
return macho_add_fat (state, filename, descriptor, 1, hdroffset,
|
|
match_uuid, base_address, skip_symtab,
|
|
nfat_arch,
|
|
header.magic == MACH_O_MH_CIGAM_FAT_64,
|
|
error_callback, data, fileline_fn, found_sym);
|
|
}
|
|
default:
|
|
error_callback (data, "executable file is not in Mach-O format", 0);
|
|
goto fail;
|
|
}
|
|
|
|
switch (header.filetype)
|
|
{
|
|
case MACH_O_MH_EXECUTE:
|
|
case MACH_O_MH_DYLIB:
|
|
case MACH_O_MH_DSYM:
|
|
break;
|
|
default:
|
|
error_callback (data, "executable file is not an executable", 0);
|
|
goto fail;
|
|
}
|
|
|
|
if (!backtrace_get_view (state, descriptor, hdroffset, header.sizeofcmds,
|
|
error_callback, data, &cmds_view))
|
|
goto fail;
|
|
cmds_view_valid = 1;
|
|
|
|
memset (&dwarf_sections, 0, sizeof dwarf_sections);
|
|
have_dwarf = 0;
|
|
memset (&uuid, 0, sizeof uuid);
|
|
have_uuid = 0;
|
|
|
|
cmdoffset = 0;
|
|
for (i = 0; i < header.ncmds; ++i)
|
|
{
|
|
const char *pcmd;
|
|
struct macho_load_command load_command;
|
|
|
|
if (cmdoffset + sizeof load_command > header.sizeofcmds)
|
|
break;
|
|
|
|
pcmd = (const char *) cmds_view.data + cmdoffset;
|
|
memcpy (&load_command, pcmd, sizeof load_command);
|
|
|
|
switch (load_command.cmd)
|
|
{
|
|
case MACH_O_LC_SEGMENT:
|
|
{
|
|
struct macho_segment_command segcmd;
|
|
|
|
memcpy (&segcmd, pcmd, sizeof segcmd);
|
|
if (memcmp (segcmd.segname,
|
|
"__DWARF\0\0\0\0\0\0\0\0\0",
|
|
MACH_O_NAMELEN) == 0)
|
|
{
|
|
if (!macho_add_dwarf_segment (state, descriptor, offset,
|
|
load_command.cmd,
|
|
pcmd + sizeof segcmd,
|
|
(load_command.cmdsize
|
|
- sizeof segcmd),
|
|
segcmd.nsects, error_callback,
|
|
data, &dwarf_sections))
|
|
goto fail;
|
|
have_dwarf = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case MACH_O_LC_SEGMENT_64:
|
|
{
|
|
struct macho_segment_64_command segcmd;
|
|
|
|
memcpy (&segcmd, pcmd, sizeof segcmd);
|
|
if (memcmp (segcmd.segname,
|
|
"__DWARF\0\0\0\0\0\0\0\0\0",
|
|
MACH_O_NAMELEN) == 0)
|
|
{
|
|
if (!macho_add_dwarf_segment (state, descriptor, offset,
|
|
load_command.cmd,
|
|
pcmd + sizeof segcmd,
|
|
(load_command.cmdsize
|
|
- sizeof segcmd),
|
|
segcmd.nsects, error_callback,
|
|
data, &dwarf_sections))
|
|
goto fail;
|
|
have_dwarf = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case MACH_O_LC_SYMTAB:
|
|
if (!skip_symtab)
|
|
{
|
|
struct macho_symtab_command symcmd;
|
|
|
|
memcpy (&symcmd, pcmd, sizeof symcmd);
|
|
if (!macho_add_symtab (state, descriptor, base_address, is_64,
|
|
offset + symcmd.symoff, symcmd.nsyms,
|
|
offset + symcmd.stroff, symcmd.strsize,
|
|
error_callback, data))
|
|
goto fail;
|
|
|
|
*found_sym = 1;
|
|
}
|
|
break;
|
|
|
|
case MACH_O_LC_UUID:
|
|
{
|
|
struct macho_uuid_command uuidcmd;
|
|
|
|
memcpy (&uuidcmd, pcmd, sizeof uuidcmd);
|
|
memcpy (&uuid[0], &uuidcmd.uuid[0], MACH_O_UUID_LEN);
|
|
have_uuid = 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
cmdoffset += load_command.cmdsize;
|
|
}
|
|
|
|
if (!backtrace_close (descriptor, error_callback, data))
|
|
goto fail;
|
|
descriptor = -1;
|
|
|
|
backtrace_release_view (state, &cmds_view, error_callback, data);
|
|
cmds_view_valid = 0;
|
|
|
|
if (match_uuid != NULL)
|
|
{
|
|
/* If we don't have a UUID, or it doesn't match, just ignore
|
|
this file. */
|
|
if (!have_uuid
|
|
|| memcmp (match_uuid, &uuid[0], MACH_O_UUID_LEN) != 0)
|
|
return 1;
|
|
}
|
|
|
|
if (have_dwarf)
|
|
{
|
|
int is_big_endian;
|
|
|
|
is_big_endian = 0;
|
|
#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
|
|
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
|
|
is_big_endian = 1;
|
|
#endif
|
|
#endif
|
|
|
|
if (!backtrace_dwarf_add (state, base_address, &dwarf_sections,
|
|
is_big_endian, NULL, error_callback, data,
|
|
fileline_fn, NULL))
|
|
goto fail;
|
|
}
|
|
|
|
if (!have_dwarf && have_uuid)
|
|
{
|
|
if (!macho_add_dsym (state, filename, base_address, &uuid[0],
|
|
error_callback, data, fileline_fn))
|
|
goto fail;
|
|
}
|
|
|
|
return 1;
|
|
|
|
fail:
|
|
if (cmds_view_valid)
|
|
backtrace_release_view (state, &cmds_view, error_callback, data);
|
|
if (descriptor != -1)
|
|
backtrace_close (descriptor, error_callback, data);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef HAVE_MACH_O_DYLD_H
|
|
|
|
/* Initialize the backtrace data we need from a Mach-O executable
|
|
using the dyld support functions. This closes descriptor. */
|
|
|
|
int
|
|
backtrace_initialize (struct backtrace_state *state, const char *filename,
|
|
int descriptor, backtrace_error_callback error_callback,
|
|
void *data, fileline *fileline_fn)
|
|
{
|
|
uint32_t c;
|
|
uint32_t i;
|
|
int closed_descriptor;
|
|
int found_sym;
|
|
fileline macho_fileline_fn;
|
|
|
|
closed_descriptor = 0;
|
|
found_sym = 0;
|
|
macho_fileline_fn = macho_nodebug;
|
|
|
|
c = _dyld_image_count ();
|
|
for (i = 0; i < c; ++i)
|
|
{
|
|
struct libbacktrace_base_address base_address;
|
|
const char *name;
|
|
int d;
|
|
fileline mff;
|
|
int mfs;
|
|
|
|
name = _dyld_get_image_name (i);
|
|
if (name == NULL)
|
|
continue;
|
|
|
|
if (strcmp (name, filename) == 0 && !closed_descriptor)
|
|
{
|
|
d = descriptor;
|
|
closed_descriptor = 1;
|
|
}
|
|
else
|
|
{
|
|
int does_not_exist;
|
|
|
|
d = backtrace_open (name, error_callback, data, &does_not_exist);
|
|
if (d < 0)
|
|
continue;
|
|
}
|
|
|
|
base_address.m = _dyld_get_image_vmaddr_slide (i);
|
|
|
|
mff = macho_nodebug;
|
|
if (!macho_add (state, name, d, 0, NULL, base_address, 0,
|
|
error_callback, data, &mff, &mfs))
|
|
continue;
|
|
|
|
if (mff != macho_nodebug)
|
|
macho_fileline_fn = mff;
|
|
if (mfs)
|
|
found_sym = 1;
|
|
}
|
|
|
|
if (!closed_descriptor)
|
|
backtrace_close (descriptor, error_callback, data);
|
|
|
|
if (!state->threaded)
|
|
{
|
|
if (found_sym)
|
|
state->syminfo_fn = macho_syminfo;
|
|
else if (state->syminfo_fn == NULL)
|
|
state->syminfo_fn = macho_nosyms;
|
|
}
|
|
else
|
|
{
|
|
if (found_sym)
|
|
backtrace_atomic_store_pointer (&state->syminfo_fn, &macho_syminfo);
|
|
else
|
|
(void) __sync_bool_compare_and_swap (&state->syminfo_fn, NULL,
|
|
macho_nosyms);
|
|
}
|
|
|
|
if (!state->threaded)
|
|
*fileline_fn = state->fileline_fn;
|
|
else
|
|
*fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
|
|
|
|
if (*fileline_fn == NULL || *fileline_fn == macho_nodebug)
|
|
*fileline_fn = macho_fileline_fn;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#else /* !defined (HAVE_MACH_O_DYLD_H) */
|
|
|
|
/* Initialize the backtrace data we need from a Mach-O executable
|
|
without using the dyld support functions. This closes
|
|
descriptor. */
|
|
|
|
int
|
|
backtrace_initialize (struct backtrace_state *state, const char *filename,
|
|
int descriptor, backtrace_error_callback error_callback,
|
|
void *data, fileline *fileline_fn)
|
|
{
|
|
fileline macho_fileline_fn;
|
|
struct libbacktrace_base_address zero_base_address;
|
|
int found_sym;
|
|
|
|
macho_fileline_fn = macho_nodebug;
|
|
memset (&zero_base_address, 0, sizeof zero_base_address);
|
|
if (!macho_add (state, filename, descriptor, 0, NULL, zero_base_address, 0,
|
|
error_callback, data, &macho_fileline_fn, &found_sym))
|
|
return 0;
|
|
|
|
if (!state->threaded)
|
|
{
|
|
if (found_sym)
|
|
state->syminfo_fn = macho_syminfo;
|
|
else if (state->syminfo_fn == NULL)
|
|
state->syminfo_fn = macho_nosyms;
|
|
}
|
|
else
|
|
{
|
|
if (found_sym)
|
|
backtrace_atomic_store_pointer (&state->syminfo_fn, &macho_syminfo);
|
|
else
|
|
(void) __sync_bool_compare_and_swap (&state->syminfo_fn, NULL,
|
|
macho_nosyms);
|
|
}
|
|
|
|
if (!state->threaded)
|
|
*fileline_fn = state->fileline_fn;
|
|
else
|
|
*fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
|
|
|
|
if (*fileline_fn == NULL || *fileline_fn == macho_nodebug)
|
|
*fileline_fn = macho_fileline_fn;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif /* !defined (HAVE_MACH_O_DYLD_H) */
|
|
|
|
}
|