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Add the ability to search for all the inlined instances of a given function.

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Reviewed by:	jb
Obtained from:	Juniper Networks
This commit is contained in:
David E. O'Brien 2011-05-07 01:05:31 +00:00
parent 0b96ba12be
commit 9b2a96cc04
8 changed files with 282 additions and 1 deletions
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1
lib/libdwarf/Makefile
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@ -14,6 +14,7 @@ SRCS= \
dwarf_errno.c \
dwarf_finish.c \
dwarf_form.c \
dwarf_func.c \
dwarf_init.c \
dwarf_loc.c

31
lib/libdwarf/_libdwarf.h
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@ -163,6 +163,37 @@ struct _Dwarf_Debug {
dbg_cu; /* List of compilation units. */
Dwarf_CU dbg_cu_current;
/* Ptr to the current compilation unit. */
STAILQ_HEAD(, _Dwarf_Func) dbg_func; /* List of functions */
};
struct _Dwarf_Func {
Dwarf_Die func_die;
const char *func_name;
Dwarf_Addr func_low_pc;
Dwarf_Addr func_high_pc;
int func_is_inlined;
/* inlined instance */
STAILQ_HEAD(, _Dwarf_Inlined_Func) func_inlined_instances;
STAILQ_ENTRY(_Dwarf_Func) func_next;
};
struct _Dwarf_Inlined_Func {
struct _Dwarf_Func *ifunc_origin;
Dwarf_Die ifunc_abstract;
Dwarf_Die ifunc_concrete;
Dwarf_Addr ifunc_low_pc;
Dwarf_Addr ifunc_high_pc;
STAILQ_ENTRY(_Dwarf_Inlined_Func) ifunc_next;
};
void dwarf_build_function_table(Dwarf_Debug dbg);
#ifdef DWARF_DEBUG
#include <assert.h>
#define DWARF_ASSERT(x) assert(x)
#else
#define DWARF_ASSERT(x)
#endif
#endif /* !__LIBDWARF_H_ */

227
lib/libdwarf/dwarf_func.c Normal file
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@ -0,0 +1,227 @@
/*-
* Copyright (c) 2008-2009, 2011, Juniper Networks, Inc.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 REGENTS OR CONTRIBUTORS 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.
*
* JNPR: dwarf_func.c 336441 2009-10-17 09:19:54Z deo
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdlib.h>
#include <string.h>
#include <libdwarf.h>
#include <_libdwarf.h>
static void
dwarf_add_function(Dwarf_Debug dbg, Dwarf_Func func)
{
STAILQ_INSERT_TAIL(&dbg->dbg_func, func, func_next);
}
int
dwarf_function_get_addr_range(Dwarf_Func f, Dwarf_Addr *low_pc,
Dwarf_Addr *high_pc)
{
*low_pc = f->func_low_pc;
*high_pc = f->func_high_pc;
return 0;
}
int
dwarf_inlined_function_get_addr_range(Dwarf_Inlined_Func f, Dwarf_Addr *low_pc,
Dwarf_Addr *high_pc)
{
*low_pc = f->ifunc_low_pc;
*high_pc = f->ifunc_high_pc;
return 0;
}
int
dwarf_function_is_inlined(Dwarf_Func f)
{
if (f->func_is_inlined == DW_INL_inlined ||
f->func_is_inlined == DW_INL_declared_inlined)
return 1;
else
return 0;
}
Dwarf_Func
dwarf_find_function_by_name(Dwarf_Debug dbg, const char *name)
{
/* XXX: replace with a fast version */
Dwarf_Func func;
STAILQ_FOREACH(func, &dbg->dbg_func, func_next) {
if (strcmp(name, func->func_name) == 0)
return func;
}
return NULL;
}
Dwarf_Func
dwarf_find_function_by_offset(Dwarf_Debug dbg, Dwarf_Off off)
{
Dwarf_Func func;
Dwarf_Die die;
/* printf("look for %llx\n", off); */
STAILQ_FOREACH(func, &dbg->dbg_func, func_next) {
die = func->func_die;
if ((off_t)die->die_offset == off) {
return func;
}
}
return NULL;
}
void
dwarf_build_function_table(Dwarf_Debug dbg)
{
Dwarf_CU cu;
Dwarf_AttrValue av;
Dwarf_Die die, origin_die;
Dwarf_Func func, origin_func;
Dwarf_Inlined_Func ifunc;
unsigned long long offset;
const char *name;
Dwarf_Error error;
/*
* find out all the functions
*/
STAILQ_FOREACH(cu, &dbg->dbg_cu, cu_next) {
STAILQ_FOREACH(die, &cu->cu_die, die_next) {
if (die->die_a->a_tag == DW_TAG_subprogram) {
/*
* Some function has multiple entries, i.e.
* if a function is inlined, it has many
* abstract/concrete instances, the abstract
* instances are with DW_TAG_subprogram.
*/
dwarf_attrval_string(die, DW_AT_name, &name,
&error);
func = dwarf_find_function_by_name(dbg, name);
if (func == NULL) {
func = malloc(
sizeof(struct _Dwarf_Func));
DWARF_ASSERT(func);
func->func_die = die;
func->func_name = name;
STAILQ_INIT(
&func->func_inlined_instances);
dwarf_add_function(dbg, func);
STAILQ_FOREACH(av, &die->die_attrval,
av_next) {
switch (av->av_attrib) {
case DW_AT_low_pc:
func->func_low_pc =
av->u[0].u64;
break;
case DW_AT_high_pc:
func->func_high_pc =
av->u[0].u64;
break;
case DW_AT_inline:
func->func_is_inlined =
av->u[0].u64;
break;
}
}
}
}
}
}
/*
* Now check the concrete inlined instances.
*/
STAILQ_FOREACH(cu, &dbg->dbg_cu, cu_next) {
STAILQ_FOREACH(die, &cu->cu_die, die_next) {
if (die->die_a->a_tag == DW_TAG_inlined_subroutine) {
ifunc = malloc(
sizeof(struct _Dwarf_Inlined_Func));
DWARF_ASSERT(ifunc);
STAILQ_FOREACH(av, &die->die_attrval, av_next) {
switch (av->av_attrib) {
case DW_AT_abstract_origin:
offset = av->u[0].u64 +
die->die_cu->cu_offset;
origin_die = dwarf_die_find(
die, offset);
DWARF_ASSERT(origin_die != 0);
/*
* the abstract origin must
* have been merged with
* another die
*/
dwarf_attrval_string(
origin_die, DW_AT_name,
&name, &error);
origin_func =
dwarf_find_function_by_name
(dbg, name);
DWARF_ASSERT(origin_func != 0);
STAILQ_INSERT_TAIL(
&origin_func->
func_inlined_instances,
ifunc, ifunc_next);
break;
case DW_AT_low_pc:
ifunc->ifunc_low_pc =
av->u[0].u64;
break;
case DW_AT_high_pc:
ifunc->ifunc_high_pc =
av->u[0].u64;
break;
}
}
}
}
}
}
void
dwarf_function_iterate_inlined_instance(Dwarf_Func func,
Dwarf_Inlined_Callback f, void *data)
{
Dwarf_Inlined_Func ifunc;
if (!dwarf_function_is_inlined(func))
return;
STAILQ_FOREACH(ifunc, &func->func_inlined_instances, ifunc_next) {
f(ifunc, data);
}
}

4
lib/libdwarf/dwarf_init.c
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@ -578,6 +578,9 @@ dwarf_init_info(Dwarf_Debug dbg, Dwarf_Error *error)
offset = next_offset;
}
/* Build the function table. */
dwarf_build_function_table(dbg);
return ret;
}
@ -686,6 +689,7 @@ dwarf_elf_init(Elf *elf, int mode, Dwarf_Debug *ret_dbg, Dwarf_Error *error)
dbg->dbg_mode = mode;
STAILQ_INIT(&dbg->dbg_cu);
STAILQ_INIT(&dbg->dbg_func);
*ret_dbg = dbg;

14
lib/libdwarf/libdwarf.h
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@ -51,6 +51,7 @@ typedef struct _Dwarf_Debug *Dwarf_Debug;
typedef struct _Dwarf_Die *Dwarf_Die;
typedef struct _Dwarf_Fde *Dwarf_Fde;
typedef struct _Dwarf_Func *Dwarf_Func;
typedef struct _Dwarf_Inlined_Func *Dwarf_Inlined_Func;
typedef struct _Dwarf_Global *Dwarf_Global;
typedef struct _Dwarf_Line *Dwarf_Line;
typedef struct _Dwarf_Type *Dwarf_Type;
@ -71,6 +72,9 @@ typedef struct {
Dwarf_Loc *ld_s;
} Dwarf_Locdesc;
/* receiver function for dwarf_function_iterate_inlined_instance() API */
typedef void (*Dwarf_Inlined_Callback)(Dwarf_Inlined_Func, void *);
/*
* Error numbers which are specific to this implementation.
*/
@ -157,6 +161,16 @@ void dwarf_dump_strtab(Dwarf_Debug);
void dwarf_dump_symtab(Dwarf_Debug);
void dwarf_dump_raw(Dwarf_Debug);
void dwarf_dump_tree(Dwarf_Debug);
Dwarf_Func dwarf_find_function_by_offset(Dwarf_Debug dbg, Dwarf_Off off);
Dwarf_Func dwarf_find_function_by_name(Dwarf_Debug dbg, const char *name);
int dwarf_function_get_addr_range(Dwarf_Func f,
Dwarf_Addr *low_pc, Dwarf_Addr *high_pc);
int dwarf_function_is_inlined(Dwarf_Func f);
void dwarf_function_iterate_inlined_instance(Dwarf_Func func,
Dwarf_Inlined_Callback f, void *data);
int dwarf_inlined_function_get_addr_range(Dwarf_Inlined_Func f,
Dwarf_Addr *low_pc, Dwarf_Addr *high_pc);
__END_DECLS
#endif /* !_LIBDWARF_H_ */

2
lib/libelf/Makefile
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@ -57,7 +57,7 @@ INCS= libelf.h gelf.h
GENSRCS= libelf_fsize.c libelf_msize.c libelf_convert.c
CLEANFILES= ${GENSRCS}
CFLAGS+= -I. -I${.CURDIR}
CFLAGS+= -I${.CURDIR} -I${.CURDIR}/../../sys
SHLIB_MAJOR= 1

2
lib/libelf/libelf_data.c
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@ -84,6 +84,8 @@ _libelf_xlate_shtype(uint32_t sht)
case SHT_SUNW_dof:
return (ELF_T_BYTE);
#endif
case SHT_MIPS_DWARF:
/* FALLTHROUGH */
case SHT_AMD64_UNWIND: /* == SHT_IA_64_UNWIND */
return (ELF_T_BYTE);
default:

2
sys/sys/elf_common.h
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@ -1,4 +1,5 @@
/*-
* Copyright (c) 2000, 2001, 2008, 2011, David E. O'Brien
* Copyright (c) 1998 John D. Polstra.
* All rights reserved.
*
@ -295,6 +296,7 @@ typedef struct {
#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
#define SHT_AMD64_UNWIND 0x70000001 /* unwind information */
#define SHT_MIPS_DWARF 0x7000001e /* MIPS gcc uses MIPS_DWARF */
#define SHT_HIPROC 0x7fffffff /* specific section header types */
#define SHT_LOUSER 0x80000000 /* reserved range for application */
#define SHT_HIUSER 0xffffffff /* specific indexes */