2011-06-27 15:27:27 +08:00
|
|
|
#ifndef _DWARF_AUX_H
|
|
|
|
|
#define _DWARF_AUX_H
|
|
|
|
|
/*
|
|
|
|
|
* dwarf-aux.h : libdw auxiliary interfaces
|
|
|
|
|
*
|
|
|
|
|
* 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 <dwarf.h>
|
|
|
|
|
#include <elfutils/libdw.h>
|
|
|
|
|
#include <elfutils/libdwfl.h>
|
|
|
|
|
#include <elfutils/version.h>
|
|
|
|
|
|
|
|
|
|
/* Find the realpath of the target file */
|
|
|
|
|
extern const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname);
|
|
|
|
|
|
|
|
|
|
/* Get DW_AT_comp_dir (should be NULL with older gcc) */
|
|
|
|
|
extern const char *cu_get_comp_dir(Dwarf_Die *cu_die);
|
|
|
|
|
|
|
|
|
|
/* Get a line number and file name for given address */
|
|
|
|
|
extern int cu_find_lineinfo(Dwarf_Die *cudie, unsigned long addr,
|
|
|
|
|
const char **fname, int *lineno);
|
|
|
|
|
|
2011-08-11 19:02:59 +08:00
|
|
|
/* Walk on funcitons at given address */
|
|
|
|
|
extern int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
|
|
|
|
|
int (*callback)(Dwarf_Die *, void *), void *data);
|
|
|
|
|
|
2012-04-23 11:24:36 +08:00
|
|
|
/* Ensure that this DIE is a subprogram and definition (not declaration) */
|
|
|
|
|
extern bool die_is_func_def(Dwarf_Die *dw_die);
|
|
|
|
|
|
2011-06-27 15:27:27 +08:00
|
|
|
/* Compare diename and tname */
|
|
|
|
|
extern bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
|
|
|
|
|
|
|
|
|
|
/* Get callsite line number of inline-function instance */
|
|
|
|
|
extern int die_get_call_lineno(Dwarf_Die *in_die);
|
|
|
|
|
|
perf probe: Fix to search nested inlined functions in CU
Fix perf probe to walk through the lines of all nested inlined function
call sites and declared lines when a whole CU is passed to the line
walker.
The die_walk_lines() can have two different type of DIEs, subprogram (or
inlined-subroutine) DIE and CU DIE.
If a caller passes a subprogram DIE, this means that the walker walk on
lines of given subprogram. In this case, it just needs to search on
direct children of DIE tree for finding call-site information of inlined
function which directly called from given subprogram.
On the other hand, if a caller passes a CU DIE to the walker, this means
that the walker have to walk on all lines in the source files included
in given CU DIE. In this case, it has to search whole DIE trees of all
subprograms to find the call-site information of all nested inlined
functions.
Without this patch:
$ perf probe --line kernel/cpu.c:151-157
</home/mhiramat/ksrc/linux-2.6/kernel/cpu.c:151>
static int cpu_notify(unsigned long val, void *v)
{
154 return __cpu_notify(val, v, -1, NULL);
}
With this:
$ perf probe --line kernel/cpu.c:151-157
</home/mhiramat/ksrc/linux-2.6/kernel/cpu.c:151>
152 static int cpu_notify(unsigned long val, void *v)
{
154 return __cpu_notify(val, v, -1, NULL);
}
As you can see, --line option with source line range shows the declared
lines as probe-able.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20110811110241.19900.34994.stgit@fedora15
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-08-11 19:02:41 +08:00
|
|
|
/* Get callsite file name of inlined function instance */
|
|
|
|
|
extern const char *die_get_call_file(Dwarf_Die *in_die);
|
|
|
|
|
|
2011-06-27 15:27:27 +08:00
|
|
|
/* Get type die */
|
|
|
|
|
extern Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Get a type die, but skip qualifiers and typedef */
|
|
|
|
|
extern Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Check whether the DIE is signed or not */
|
|
|
|
|
extern bool die_is_signed_type(Dwarf_Die *tp_die);
|
|
|
|
|
|
|
|
|
|
/* Get data_member_location offset */
|
|
|
|
|
extern int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
|
|
|
|
|
|
|
|
|
|
/* Return values for die_find_child() callbacks */
|
|
|
|
|
enum {
|
|
|
|
|
DIE_FIND_CB_END = 0, /* End of Search */
|
|
|
|
|
DIE_FIND_CB_CHILD = 1, /* Search only children */
|
|
|
|
|
DIE_FIND_CB_SIBLING = 2, /* Search only siblings */
|
|
|
|
|
DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Search child DIEs */
|
|
|
|
|
extern Dwarf_Die *die_find_child(Dwarf_Die *rt_die,
|
|
|
|
|
int (*callback)(Dwarf_Die *, void *),
|
|
|
|
|
void *data, Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Search a non-inlined function including given address */
|
|
|
|
|
extern Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
|
|
|
|
|
Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Search an inlined function including given address */
|
|
|
|
|
extern Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
|
|
|
|
|
Dwarf_Die *die_mem);
|
|
|
|
|
|
2011-08-11 19:03:11 +08:00
|
|
|
/* Walk on the instances of given DIE */
|
|
|
|
|
extern int die_walk_instances(Dwarf_Die *in_die,
|
|
|
|
|
int (*callback)(Dwarf_Die *, void *), void *data);
|
|
|
|
|
|
2011-06-27 15:27:27 +08:00
|
|
|
/* Walker on lines (Note: line number will not be sorted) */
|
|
|
|
|
typedef int (* line_walk_callback_t) (const char *fname, int lineno,
|
|
|
|
|
Dwarf_Addr addr, void *data);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
|
|
|
|
|
* the lines inside the subprogram, otherwise the DIE must be a CU DIE.
|
|
|
|
|
*/
|
|
|
|
|
extern int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback,
|
|
|
|
|
void *data);
|
|
|
|
|
|
|
|
|
|
/* Find a variable called 'name' at given address */
|
|
|
|
|
extern Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
|
|
|
|
|
Dwarf_Addr addr, Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Find a member called 'name' */
|
|
|
|
|
extern Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
|
|
|
|
|
Dwarf_Die *die_mem);
|
|
|
|
|
|
|
|
|
|
/* Get the name of given variable DIE */
|
|
|
|
|
extern int die_get_typename(Dwarf_Die *vr_die, char *buf, int len);
|
|
|
|
|
|
|
|
|
|
/* Get the name and type of given variable DIE, stored as "type\tname" */
|
|
|
|
|
extern int die_get_varname(Dwarf_Die *vr_die, char *buf, int len);
|
|
|
|
|
#endif
|