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2003-11-14 Jeff Johnston <jjohnstn@redhat.com>

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* libunwind-frame.c: New file.
        * libunwind-frame.h: New file.
        * acconfig.h (HAVE_LIBUNWIND): #undef reference added.
        * configure.in: Add --with-libunwind option support.  Define
        HAVE_LIBUNWIND if libunwind support selected / defaulted.
        Also check for libunwind.h and libunwind-ia64.h headers.
        * configure: Regenerated.
        * Makefile.in: Add support for libunwind-frame.o.
        * config.in: Regenerated.
This commit is contained in:
Jeff Johnston 2003-11-14 21:17:51 +00:00
parent 287a334e72
commit 0e5d83e3b6
8 changed files with 1219 additions and 524 deletions
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12
gdb/ChangeLog
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@ -1,3 +1,15 @@
2003-11-14 Jeff Johnston <jjohnstn@redhat.com>
* libunwind-frame.c: New file.
* libunwind-frame.h: New file.
* acconfig.h (HAVE_LIBUNWIND): #undef reference added.
* configure.in: Add --with-libunwind option support. Define
HAVE_LIBUNWIND if libunwind support selected / defaulted.
Also check for libunwind.h and libunwind-ia64.h headers.
* configure: Regenerated.
* Makefile.in: Add support for libunwind-frame.o.
* config.in: Regenerated.
2003-11-14 Jeff Johnston <jjohnstn@redhat.com>
* config/ia64/nm-linux.h (NATIVE_XFER_UNWIND_TABLE): New macro to

8
gdb/Makefile.in
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@ -708,6 +708,7 @@ interps_h = interps.h
jv_lang_h = jv-lang.h
kod_h = kod.h
language_h = language.h
libunwind_frame_h = libunwind-frame.h
linespec_h = linespec.h
linux_nat_h = linux-nat.h
m2_lang_h = m2-lang.h
@ -1281,6 +1282,7 @@ ALLDEPFILES = \
i386gnu-nat.c i386gnu-tdep.c \
ia64-linux-nat.c ia64-linux-tdep.c ia64-tdep.c \
infptrace.c inftarg.c irix4-nat.c irix5-nat.c \
libunwind-frame.c \
lynx-nat.c m3-nat.c \
m68hc11-tdep.c \
m68k-tdep.c \
@ -1912,7 +1914,7 @@ ia64-tdep.o: ia64-tdep.c $(defs_h) $(inferior_h) $(symfile_h) $(gdbcore_h) \
$(arch_utils_h) $(floatformat_h) $(regcache_h) $(reggroups_h) \
$(frame_h) $(frame_base_h) $(frame_unwind_h) $(doublest_h) \
$(value_h) $(gdb_assert_h) $(objfiles_h) $(elf_common_h) \
$(elf_bfd_h) $(dis_asm_h)
$(elf_bfd_h) $(dis_asm_h) $(libunwind_frame_h)
infcall.o: infcall.c $(defs_h) $(breakpoint_h) $(target_h) $(regcache_h) \
$(inferior_h) $(gdb_assert_h) $(block_h) $(gdbcore_h) $(language_h) \
$(symfile_h) $(gdbcmd_h) $(command_h) $(gdb_string_h) $(infcall_h)
@ -1960,6 +1962,10 @@ kod-cisco.o: kod-cisco.c $(defs_h) $(gdb_string_h) $(kod_h)
language.o: language.c $(defs_h) $(gdb_string_h) $(symtab_h) $(gdbtypes_h) \
$(value_h) $(gdbcmd_h) $(expression_h) $(language_h) $(target_h) \
$(parser_defs_h) $(jv_lang_h) $(demangle_h)
libunwind-frame.o: libunwind-frame.c $(defs_h) \
$(frame_h) $(frame_base_h) $(frame_unwind_h) $(gdbcore_h) \
$(gdbtypes_h) $(symtab_h) $(objfiles_h) $(regcache_h) \
$(gdb_assert_h) $(gdb_string_h) $(complaints_h) $(libunwind_frame_h)
linespec.o: linespec.c $(defs_h) $(symtab_h) $(frame_h) $(command_h) \
$(symfile_h) $(objfiles_h) $(source_h) $(demangle_h) $(value_h) \
$(completer_h) $(cp_abi_h) $(parser_defs_h) $(block_h) \

3
gdb/acconfig.h
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@ -157,6 +157,9 @@
/* Define if <sys/ptrace.h> defines the PT_GETXMMREGS request. */
#undef HAVE_PT_GETXMMREGS
/* Define if libunwind library is being used. */
#undef HAVE_LIBUNWIND
/* Multi-arch enabled. */
#undef GDB_MULTI_ARCH

9
gdb/config.in
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@ -167,6 +167,9 @@
/* Define if <sys/ptrace.h> defines the PT_GETXMMREGS request. */
#undef HAVE_PT_GETXMMREGS
/* Define if libunwind library is being used. */
#undef HAVE_LIBUNWIND
/* hostfile */
#undef GDB_XM_FILE
@ -269,6 +272,12 @@
/* Define if you have the <dirent.h> header file. */
#undef HAVE_DIRENT_H
/* Define if you have the <libunwind-ia64.h> header file. */
#undef HAVE_LIBUNWIND_IA64_H
/* Define if you have the <libunwind.h> header file. */
#undef HAVE_LIBUNWIND_H
/* Define if you have the <limits.h> header file. */
#undef HAVE_LIMITS_H

1236
gdb/configure vendored
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File diff suppressed because it is too large Load Diff

24
gdb/configure.in
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@ -192,6 +192,30 @@ case $host_os in
enable_gdbtk=no ;;
esac
# Libunwind support.
AC_ARG_WITH(libunwind,
[ --with-libunwind Use libunwind frame unwinding support],
[case "${withval}" in
yes) enable_libunwind=yes ;;
no) enable_libunwind=no ;;
*) AC_MSG_ERROR(bad value ${withval} for GDB with-libunwind option) ;;
esac],[
AC_CHECK_HEADERS(libunwind.h)
AC_CHECK_HEADERS(libunwind-ia64.h)
if test x"$ac_cv_header_libunwind_h" = xyes -a x"$ac_cv_header_libunwind_ia64_h" = xyes; then
enable_libunwind=yes;
fi
])
if test x"$enable_libunwind" = xyes; then
AC_CHECK_HEADERS(libunwind.h)
AC_CHECK_HEADERS(libunwind-ia64.h)
AC_DEFINE(HAVE_LIBUNWIND, 1)
CONFIG_OBS="$CONFIG_OBS libunwind-frame.o"
CONFIG_DEPS="$CONFIG_DEPS libunwind-frame.o"
CONFIG_SRCS="$CONFIG_SRCS libunwind-frame.c"
fi
# Profiling support.
AC_ARG_ENABLE(profiling,
[ --enable-profiling enable profiling of GDB],

388
gdb/libunwind-frame.c Normal file
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@ -0,0 +1,388 @@
/* Frame unwinder for frames using the libunwind library.
Copyright 2003 Free Software Foundation, Inc.
Written by Jeff Johnston, contributed by Red Hat Inc.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "frame.h"
#include "frame-base.h"
#include "frame-unwind.h"
#include "gdbcore.h"
#include "gdbtypes.h"
#include "symtab.h"
#include "objfiles.h"
#include "regcache.h"
#include <dlfcn.h>
#include "gdb_assert.h"
#include "gdb_string.h"
#include "libunwind-frame.h"
#include "complaints.h"
static int libunwind_initialized;
static struct gdbarch_data *libunwind_descr_handle;
#ifndef LIBUNWIND_SO
#define LIBUNWIND_SO "libunwind.so"
#endif
/* Required function pointers from libunwind. */
static int (*unw_get_reg_p) (unw_cursor_t *, unw_regnum_t, unw_word_t *);
static int (*unw_get_fpreg_p) (unw_cursor_t *, unw_regnum_t, unw_fpreg_t *);
static int (*unw_get_saveloc_p) (unw_cursor_t *, unw_regnum_t, unw_save_loc_t *);
static int (*unw_step_p) (unw_cursor_t *);
static int (*unw_init_remote_p) (unw_cursor_t *, unw_addr_space_t, void *);
static unw_addr_space_t (*unw_create_addr_space_p) (unw_accessors_t *, int);
static int (*unw_search_unwind_table_p) (unw_addr_space_t, unw_word_t, unw_dyn_info_t *,
unw_proc_info_t *, int, void *);
static unw_word_t (*unw_find_dyn_list_p) (unw_addr_space_t, void *, size_t,
unw_word_t, unw_word_t, void *);
struct libunwind_frame_cache
{
CORE_ADDR base;
CORE_ADDR func_addr;
unw_cursor_t cursor;
};
/* We need to qualify the function names with a platform-specific prefix to match
the names used by the libunwind library. The UNW_OBJ macro is provided by the
libunwind.h header file. */
#define STRINGIFY2(name) #name
#define STRINGIFY(name) STRINGIFY2(name)
static char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg));
static char *get_fpreg_name = STRINGIFY(UNW_OBJ(get_fpreg));
static char *get_saveloc_name = STRINGIFY(UNW_OBJ(get_save_loc));
static char *step_name = STRINGIFY(UNW_OBJ(step));
static char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote));
static char *create_addr_space_name = STRINGIFY(UNW_OBJ(create_addr_space));
static char *search_unwind_table_name = STRINGIFY(UNW_OBJ(search_unwind_table));
static char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list));
static struct libunwind_descr *
libunwind_descr (struct gdbarch *gdbarch)
{
return gdbarch_data (gdbarch, libunwind_descr_handle);
}
static void *
libunwind_descr_init (struct gdbarch *gdbarch)
{
struct libunwind_descr *descr = GDBARCH_OBSTACK_ZALLOC (gdbarch,
struct libunwind_descr);
return descr;
}
void
libunwind_frame_set_descr (struct gdbarch *gdbarch, struct libunwind_descr *descr)
{
struct libunwind_descr *arch_descr;
gdb_assert (gdbarch != NULL);
arch_descr = gdbarch_data (gdbarch, libunwind_descr_handle);
if (arch_descr == NULL)
{
/* First time here. Must initialize data area. */
arch_descr = libunwind_descr_init (gdbarch);
set_gdbarch_data (gdbarch, libunwind_descr_handle, arch_descr);
}
/* Copy new descriptor info into arch descriptor. */
arch_descr->gdb2uw = descr->gdb2uw;
arch_descr->uw2gdb = descr->uw2gdb;
arch_descr->is_fpreg = descr->is_fpreg;
arch_descr->accessors = descr->accessors;
}
static struct libunwind_frame_cache *
libunwind_frame_cache (struct frame_info *next_frame, void **this_cache)
{
unw_accessors_t *acc;
unw_addr_space_t as;
unw_word_t fp;
unw_regnum_t uw_sp_regnum;
struct libunwind_frame_cache *cache;
struct libunwind_descr *descr;
int i, ret;
if (*this_cache)
return *this_cache;
/* Allocate a new cache. */
cache = FRAME_OBSTACK_ZALLOC (struct libunwind_frame_cache);
cache->func_addr = frame_func_unwind (next_frame);
/* Get a libunwind cursor to the previous frame. We do this by initializing
a cursor. Libunwind treats a new cursor as the top of stack and will get
the current register set via the libunwind register accessor. Now, we
provide the platform-specific accessors and we set up the register accessor to use
the frame register unwinding interfaces so that we properly get the registers for
the current frame rather than the top. We then use the unw_step function to
move the libunwind cursor back one frame. We can later use this cursor to find previous
registers via the unw_get_reg interface which will invoke libunwind's special logic. */
descr = libunwind_descr (get_frame_arch (next_frame));
acc = descr->accessors;
as = unw_create_addr_space_p (acc,
TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
unw_init_remote_p (&cache->cursor, as, next_frame);
unw_step_p (&cache->cursor);
/* To get base address, get sp from previous frame. */
uw_sp_regnum = descr->gdb2uw (SP_REGNUM);
ret = unw_get_reg_p (&cache->cursor, uw_sp_regnum, &fp);
if (ret < 0)
error ("Can't get libunwind sp register.");
cache->base = (CORE_ADDR)fp;
*this_cache = cache;
return cache;
}
unw_word_t
libunwind_find_dyn_list (unw_addr_space_t as, void *table, size_t table_size,
unw_word_t segbase, unw_word_t gp, void *arg)
{
return unw_find_dyn_list_p (as, table, table_size, segbase, gp, arg);
}
static const struct frame_unwind libunwind_frame_unwind =
{
NORMAL_FRAME,
libunwind_frame_this_id,
libunwind_frame_prev_register
};
/* Verify if there is sufficient libunwind information for the frame to use
libunwind frame unwinding. */
const struct frame_unwind *
libunwind_frame_sniffer (struct frame_info *next_frame)
{
unw_cursor_t cursor;
unw_accessors_t *acc;
unw_addr_space_t as;
struct libunwind_descr *descr;
int i, ret;
/* To test for libunwind unwind support, initialize a cursor to the current frame and try to back
up. We use this same method when setting up the frame cache (see libunwind_frame_cache()).
If libunwind returns success for this operation, it means that it has found sufficient
libunwind unwinding information to do so. */
descr = libunwind_descr (get_frame_arch (next_frame));
acc = descr->accessors;
as = unw_create_addr_space_p (acc,
TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
ret = unw_init_remote_p (&cursor, as, next_frame);
if (ret >= 0)
ret = unw_step_p (&cursor);
if (ret < 0)
return NULL;
return &libunwind_frame_unwind;
}
void
libunwind_frame_this_id (struct frame_info *next_frame, void **this_cache,
struct frame_id *this_id)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (next_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->func_addr);
}
void
libunwind_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realnump, void *valuep)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (next_frame, this_cache);
void *ptr;
unw_cursor_t *c;
unw_save_loc_t sl;
int i, ret;
unw_word_t intval;
unw_fpreg_t fpval;
unw_regnum_t uw_regnum;
struct libunwind_descr *descr;
/* Convert from gdb register number to libunwind register number. */
descr = libunwind_descr (get_frame_arch (next_frame));
uw_regnum = descr->gdb2uw (regnum);
gdb_assert (regnum >= 0);
if (!target_has_registers)
error ("No registers.");
*optimizedp = 0;
*addrp = 0;
*lvalp = not_lval;
*realnump = -1;
memset (valuep, 0, register_size (current_gdbarch, regnum));
if (uw_regnum < 0)
return;
/* To get the previous register, we use the libunwind register APIs with
the cursor we have already pushed back to the previous frame. */
if (descr->is_fpreg (uw_regnum))
{
ret = unw_get_fpreg_p (&cache->cursor, uw_regnum, &fpval);
ptr = &fpval;
}
else
{
ret = unw_get_reg_p (&cache->cursor, uw_regnum, &intval);
ptr = &intval;
}
if (ret < 0)
return;
memcpy (valuep, ptr, register_size (current_gdbarch, regnum));
if (unw_get_saveloc_p (&cache->cursor, uw_regnum, &sl) < 0)
return;
switch (sl.type)
{
case UNW_SLT_NONE:
*optimizedp = 1;
break;
case UNW_SLT_MEMORY:
*lvalp = lval_memory;
*addrp = sl.u.addr;
break;
case UNW_SLT_REG:
*lvalp = lval_register;
*realnump = regnum;
break;
}
}
CORE_ADDR
libunwind_frame_base_address (struct frame_info *next_frame, void **this_cache)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (next_frame, this_cache);
return cache->base;
}
/* The following is a glue routine to call the libunwind unwind table
search function to get unwind information for a specified ip address. */
int
libunwind_search_unwind_table (void *as, long ip, void *di,
void *pi, int need_unwind_info, void *args)
{
return unw_search_unwind_table_p (*(unw_addr_space_t *)as, (unw_word_t )ip,
di, pi, need_unwind_info, args);
}
static int
libunwind_load (void)
{
void *handle;
handle = dlopen (LIBUNWIND_SO, RTLD_NOW);
if (handle == NULL)
return 0;
/* Initialize pointers to the dynamic library functions we will use. */
unw_get_reg_p = dlsym (handle, get_reg_name);
if (unw_get_reg_p == NULL)
return 0;
unw_get_fpreg_p = dlsym (handle, get_fpreg_name);
if (unw_get_fpreg_p == NULL)
return 0;
unw_get_saveloc_p = dlsym (handle, get_saveloc_name);
if (unw_get_saveloc_p == NULL)
return 0;
unw_step_p = dlsym (handle, step_name);
if (unw_step_p == NULL)
return 0;
unw_init_remote_p = dlsym (handle, init_remote_name);
if (unw_init_remote_p == NULL)
return 0;
unw_create_addr_space_p = dlsym (handle, create_addr_space_name);
if (unw_create_addr_space_p == NULL)
return 0;
unw_search_unwind_table_p = dlsym (handle, search_unwind_table_name);
if (unw_search_unwind_table_p == NULL)
return 0;
unw_find_dyn_list_p = dlsym (handle, find_dyn_list_name);
if (unw_find_dyn_list_p == NULL)
return 0;
return 1;
}
int
libunwind_is_initialized (void)
{
return libunwind_initialized;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_libunwind_frame (void);
void
_initialize_libunwind_frame (void)
{
libunwind_descr_handle = register_gdbarch_data (libunwind_descr_init);
libunwind_initialized = libunwind_load ();
}

63
gdb/libunwind-frame.h Normal file
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@ -0,0 +1,63 @@
/* Frame unwinder for frames with libunwind frame information.
Copyright 2003 Free Software Foundation, Inc.
Contributed by Jeff Johnston.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef HAVE_LIBUNWIND_H
#ifndef LIBUNWIND_FRAME_H
#define LIBUNWIND_FRAME_H 1
#include "libunwind.h"
struct frame_info;
struct libunwind_descr
{
int (*gdb2uw) (int);
int (*uw2gdb) (int);
int (*is_fpreg) (int);
void *accessors;
};
const struct frame_unwind *libunwind_frame_sniffer (struct frame_info *next_frame);
void libunwind_frame_set_descr (struct gdbarch *arch, struct libunwind_descr *descr);
void libunwind_frame_this_id (struct frame_info *next_frame, void **this_cache,
struct frame_id *this_id);
void libunwind_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
int *realnump, void *valuep);
CORE_ADDR libunwind_frame_base_address (struct frame_info *next_frame, void **this_cache);
int libunwind_is_initialized (void);
int libunwind_search_unwind_table (void *as, long ip, void *di,
void *pi, int need_unwind_info, void *args);
unw_word_t libunwind_find_dyn_list (unw_addr_space_t, void *, size_t,
unw_word_t, unw_word_t, void *);
#endif /* libunwind-frame.h */
#endif /* HAVE_LIBUNWIND_H */