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Subject[tip:perf/probes] perf probe: Use elfutils-libdw for analyzing debuginfo
Commit-ID:  804b36068eccd8163ccea420c662fb5d1a21b141
Gitweb: http://git.kernel.org/tip/804b36068eccd8163ccea420c662fb5d1a21b141
Author: Masami Hiramatsu <mhiramat@redhat.com>
AuthorDate: Thu, 25 Feb 2010 08:35:42 -0500
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 25 Feb 2010 17:49:29 +0100

perf probe: Use elfutils-libdw for analyzing debuginfo

Newer gcc introduces newer & richer debuginfo, and only libdw
in elfutils project can support it. So perf probe moves onto
elfutils-libdw from libdwarf.

Changes in v3:
- Cast Dwarf_Addr/Dwarf_Word to uintmax_t for printf-formats.
- Recover a sign-prefix which was removed in v2 by mistake.

Changes in v2:
- Fix a type-casting bug in Makefile.
- Cast Dwarf_Addr/Dwarf_Word to unsigned long long for printf-formats.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
LKML-Reference: <20100225133542.6725.34724.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/Makefile | 10 +-
tools/perf/builtin-probe.c | 22 +-
tools/perf/util/probe-finder.c | 696 ++++++++++++++++------------------------
tools/perf/util/probe-finder.h | 52 ++--
4 files changed, 314 insertions(+), 466 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 54a5b50..2d53738 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -500,12 +500,12 @@ else
msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel and glibc-dev[el]);
endif

-ifneq ($(shell sh -c "(echo '\#ifndef _MIPS_SZLONG'; echo '\#define _MIPS_SZLONG 0'; echo '\#endif'; echo '\#include <dwarf.h>'; echo '\#include <libdwarf.h>'; echo 'int main(void) { Dwarf_Debug dbg; Dwarf_Error err; Dwarf_Ranges *rng; dwarf_init(0, DW_DLC_READ, 0, 0, &dbg, &err); dwarf_get_ranges(dbg, 0, &rng, 0, 0, &err); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/libdwarf -ldwarf -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
- msg := $(warning No libdwarf.h found or old libdwarf.h found, disables dwarf support. Please install libdwarf-dev/libdwarf-devel >= 20081231);
- BASIC_CFLAGS += -DNO_LIBDWARF
+ifneq ($(shell sh -c "(echo '\#include <dwarf.h>'; echo '\#include <libdw.h>'; echo 'int main(void) { Dwarf *dbg; dbg = dwarf_begin(0, DWARF_C_READ); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/elfutils -ldw -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y)
+ msg := $(warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/elfutils-dev);
+ BASIC_CFLAGS += -DNO_DWARF_SUPPORT
else
- BASIC_CFLAGS += -I/usr/include/libdwarf
- EXTLIBS += -lelf -ldwarf
+ BASIC_CFLAGS += -I/usr/include/elfutils
+ EXTLIBS += -lelf -ldw
LIB_OBJS += util/probe-finder.o
endif

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index c3e6119..d8d3f05 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -128,7 +128,7 @@ static void evaluate_probe_point(struct probe_point *pp)
pp->function);
}

-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
static int open_vmlinux(void)
{
if (map__load(session.kmaps[MAP__FUNCTION], NULL) < 0) {
@@ -156,7 +156,7 @@ static const char * const probe_usage[] = {
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
"perf probe --list",
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
"perf probe --line 'LINEDESC'",
#endif
NULL
@@ -165,7 +165,7 @@ static const char * const probe_usage[] = {
static const struct option options[] = {
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show parsed arguments, etc)"),
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
#endif
@@ -174,7 +174,7 @@ static const struct option options[] = {
OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
opt_del_probe_event),
OPT_CALLBACK('a', "add", NULL,
-#ifdef NO_LIBDWARF
+#ifdef NO_DWARF_SUPPORT
"[EVENT=]FUNC[+OFFS|%return] [ARG ...]",
#else
"[EVENT=]FUNC[+OFFS|%return|:RLN][@SRC]|SRC:ALN [ARG ...]",
@@ -185,7 +185,7 @@ static const struct option options[] = {
"\t\tFUNC:\tFunction name\n"
"\t\tOFFS:\tOffset from function entry (in byte)\n"
"\t\t%return:\tPut the probe at function return\n"
-#ifdef NO_LIBDWARF
+#ifdef NO_DWARF_SUPPORT
"\t\tARG:\tProbe argument (only \n"
#else
"\t\tSRC:\tSource code path\n"
@@ -197,7 +197,7 @@ static const struct option options[] = {
opt_add_probe_event),
OPT_BOOLEAN('f', "force", &session.force_add, "forcibly add events"
" with existing name"),
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
OPT_CALLBACK('L', "line", NULL,
"FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]",
"Show source code lines.", opt_show_lines),
@@ -225,7 +225,7 @@ static void init_vmlinux(void)
int cmd_probe(int argc, const char **argv, const char *prefix __used)
{
int i, ret;
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
int fd;
#endif
struct probe_point *pp;
@@ -261,7 +261,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
return 0;
}

-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
if (session.show_lines) {
if (session.nr_probe != 0 || session.dellist) {
pr_warning(" Error: Don't use --line with"
@@ -292,9 +292,9 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
init_vmlinux();

if (session.need_dwarf)
-#ifdef NO_LIBDWARF
+#ifdef NO_DWARF_SUPPORT
die("Debuginfo-analysis is not supported");
-#else /* !NO_LIBDWARF */
+#else /* !NO_DWARF_SUPPORT */
pr_debug("Some probes require debuginfo.\n");

fd = open_vmlinux();
@@ -335,7 +335,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
close(fd);

end_dwarf:
-#endif /* !NO_LIBDWARF */
+#endif /* !NO_DWARF_SUPPORT */

/* Synthesize probes without dwarf */
for (i = 0; i < session.nr_probe; i++) {
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index c819fd5..c422472 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -44,8 +44,6 @@ struct die_link {
Dwarf_Die die; /* Current die */
};

-static Dwarf_Debug __dw_debug;
-static Dwarf_Error __dw_error;

/*
* Generic dwarf analysis helpers
@@ -114,157 +112,114 @@ static int strtailcmp(const char *s1, const char *s2)
}

/* Find the fileno of the target file. */
-static Dwarf_Unsigned cu_find_fileno(Dwarf_Die cu_die, const char *fname)
+static int cu_find_fileno(Dwarf_Die *cu_die, const char *fname)
{
- Dwarf_Signed cnt, i;
- Dwarf_Unsigned found = 0;
- char **srcs;
+ Dwarf_Files *files;
+ size_t nfiles, i;
+ const char *src;
int ret;

if (!fname)
- return 0;
+ return -EINVAL;

- ret = dwarf_srcfiles(cu_die, &srcs, &cnt, &__dw_error);
- if (ret == DW_DLV_OK) {
- for (i = 0; i < cnt && !found; i++) {
- if (strtailcmp(srcs[i], fname) == 0)
- found = i + 1;
- dwarf_dealloc(__dw_debug, srcs[i], DW_DLA_STRING);
+ ret = dwarf_getsrcfiles(cu_die, &files, &nfiles);
+ if (ret == 0) {
+ for (i = 0; i < nfiles; i++) {
+ src = dwarf_filesrc(files, i, NULL, NULL);
+ if (strtailcmp(src, fname) == 0) {
+ ret = (int)i; /*???: +1 or not?*/
+ break;
+ }
}
- for (; i < cnt; i++)
- dwarf_dealloc(__dw_debug, srcs[i], DW_DLA_STRING);
- dwarf_dealloc(__dw_debug, srcs, DW_DLA_LIST);
+ if (ret)
+ pr_debug("found fno: %d\n", ret);
}
- if (found)
- pr_debug("found fno: %d\n", (int)found);
- return found;
+ return ret;
}

-static int cu_get_filename(Dwarf_Die cu_die, Dwarf_Unsigned fno, char **buf)
+struct __addr_die_search_param {
+ Dwarf_Addr addr;
+ Dwarf_Die *die_mem;
+};
+
+static int __die_search_func_cb(Dwarf_Die *fn_die, void *data)
{
- Dwarf_Signed cnt, i;
- char **srcs;
- int ret = 0;
+ struct __addr_die_search_param *ad = data;

- if (!buf || !fno)
- return -EINVAL;
+ if (dwarf_tag(fn_die) == DW_TAG_subprogram &&
+ dwarf_haspc(fn_die, ad->addr)) {
+ memcpy(ad->die_mem, fn_die, sizeof(Dwarf_Die));
+ return DWARF_CB_ABORT;
+ }
+ return DWARF_CB_OK;
+}

- ret = dwarf_srcfiles(cu_die, &srcs, &cnt, &__dw_error);
- if (ret == DW_DLV_OK) {
- if ((Dwarf_Unsigned)cnt > fno - 1) {
- *buf = strdup(srcs[fno - 1]);
- ret = 0;
- pr_debug("found filename: %s\n", *buf);
- } else
- ret = -ENOENT;
- for (i = 0; i < cnt; i++)
- dwarf_dealloc(__dw_debug, srcs[i], DW_DLA_STRING);
- dwarf_dealloc(__dw_debug, srcs, DW_DLA_LIST);
- } else
- ret = -EINVAL;
- return ret;
+/* Search a real subprogram including this line, */
+static Dwarf_Die *die_get_real_subprogram(Dwarf_Die *cu_die, Dwarf_Addr addr,
+ Dwarf_Die *die_mem)
+{
+ struct __addr_die_search_param ad;
+ ad.addr = addr;
+ ad.die_mem = die_mem;
+ /* dwarf_getscopes can't find subprogram. */
+ if (!dwarf_getfuncs(cu_die, __die_search_func_cb, &ad, 0))
+ return NULL;
+ else
+ return die_mem;
}

/* Compare diename and tname */
-static int die_compare_name(Dwarf_Die dw_die, const char *tname)
+static bool die_compare_name(Dwarf_Die *dw_die, const char *tname)
{
- char *name;
- int ret;
- ret = dwarf_diename(dw_die, &name, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK) {
- ret = strcmp(tname, name);
- dwarf_dealloc(__dw_debug, name, DW_DLA_STRING);
- } else
- ret = -1;
- return ret;
+ const char *name;
+ name = dwarf_diename(dw_die);
+ DIE_IF(name == NULL);
+ return strcmp(tname, name);
}

/* Check the address is in the subprogram(function). */
-static int die_within_subprogram(Dwarf_Die sp_die, Dwarf_Addr addr,
- Dwarf_Signed *offs)
+static bool die_within_subprogram(Dwarf_Die *sp_die, Dwarf_Addr addr,
+ size_t *offs)
{
- Dwarf_Addr lopc, hipc;
+ Dwarf_Addr epc;
int ret;

- /* TODO: check ranges */
- ret = dwarf_lowpc(sp_die, &lopc, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_NO_ENTRY)
- return 0;
- ret = dwarf_highpc(sp_die, &hipc, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- if (lopc <= addr && addr < hipc) {
- *offs = addr - lopc;
- return 1;
- } else
- return 0;
-}
+ ret = dwarf_haspc(sp_die, addr);
+ if (ret <= 0)
+ return false;

-/* Check the die is inlined function */
-static Dwarf_Bool die_inlined_subprogram(Dwarf_Die dw_die)
-{
- /* TODO: check strictly */
- Dwarf_Bool inl;
- int ret;
+ if (offs) {
+ ret = dwarf_entrypc(sp_die, &epc);
+ DIE_IF(ret == -1);
+ *offs = addr - epc;
+ }

- ret = dwarf_hasattr(dw_die, DW_AT_inline, &inl, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- return inl;
+ return true;
}

-/* Get the offset of abstruct_origin */
-static Dwarf_Off die_get_abstract_origin(Dwarf_Die dw_die)
+/* Get entry pc(or low pc, 1st entry of ranges) of the die */
+static Dwarf_Addr die_get_entrypc(Dwarf_Die *dw_die)
{
- Dwarf_Attribute attr;
- Dwarf_Off cu_offs;
+ Dwarf_Addr epc;
int ret;

- ret = dwarf_attr(dw_die, DW_AT_abstract_origin, &attr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- ret = dwarf_formref(attr, &cu_offs, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
- return cu_offs;
+ ret = dwarf_entrypc(dw_die, &epc);
+ DIE_IF(ret == -1);
+ return epc;
}

-/* Get entry pc(or low pc, 1st entry of ranges) of the die */
-static Dwarf_Addr die_get_entrypc(Dwarf_Die dw_die)
+/* Check if the abstract origin's address or not */
+static bool die_compare_abstract_origin(Dwarf_Die *in_die, void *origin_addr)
{
Dwarf_Attribute attr;
- Dwarf_Addr addr;
- Dwarf_Off offs;
- Dwarf_Ranges *ranges;
- Dwarf_Signed cnt;
- int ret;
+ Dwarf_Die origin;

- /* Try to get entry pc */
- ret = dwarf_attr(dw_die, DW_AT_entry_pc, &attr, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK) {
- ret = dwarf_formaddr(attr, &addr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
- return addr;
- }
+ if (!dwarf_attr(in_die, DW_AT_abstract_origin, &attr))
+ return false;
+ if (!dwarf_formref_die(&attr, &origin))
+ return false;

- /* Try to get low pc */
- ret = dwarf_lowpc(dw_die, &addr, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK)
- return addr;
-
- /* Try to get ranges */
- ret = dwarf_attr(dw_die, DW_AT_ranges, &attr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- ret = dwarf_formref(attr, &offs, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- ret = dwarf_get_ranges(__dw_debug, offs, &ranges, &cnt, NULL,
- &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- addr = ranges[0].dwr_addr1;
- dwarf_ranges_dealloc(__dw_debug, ranges, cnt);
- return addr;
+ return origin.addr == origin_addr;
}

/*
@@ -275,7 +230,6 @@ static int __search_die_tree(struct die_link *cur_link,
int (*die_cb)(struct die_link *, void *),
void *data)
{
- Dwarf_Die new_die;
struct die_link new_link;
int ret;

@@ -285,31 +239,24 @@ static int __search_die_tree(struct die_link *cur_link,
/* Check current die */
while (!(ret = die_cb(cur_link, data))) {
/* Check child die */
- ret = dwarf_child(cur_link->die, &new_die, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK) {
+ ret = dwarf_child(&cur_link->die, &new_link.die);
+ if (ret == 0) {
new_link.parent = cur_link;
- new_link.die = new_die;
ret = __search_die_tree(&new_link, die_cb, data);
if (ret)
break;
}

/* Move to next sibling */
- ret = dwarf_siblingof(__dw_debug, cur_link->die, &new_die,
- &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- dwarf_dealloc(__dw_debug, cur_link->die, DW_DLA_DIE);
- cur_link->die = new_die;
- if (ret == DW_DLV_NO_ENTRY)
+ ret = dwarf_siblingof(&cur_link->die, &cur_link->die);
+ if (ret != 0)
return 0;
}
- dwarf_dealloc(__dw_debug, cur_link->die, DW_DLA_DIE);
return ret;
}

/* Search a die in its children's die tree */
-static int search_die_from_children(Dwarf_Die parent_die,
+static int search_die_from_children(Dwarf_Die *parent_die,
int (*die_cb)(struct die_link *, void *),
void *data)
{
@@ -317,125 +264,58 @@ static int search_die_from_children(Dwarf_Die parent_die,
int ret;

new_link.parent = NULL;
- ret = dwarf_child(parent_die, &new_link.die, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK)
+ ret = dwarf_child(parent_die, &new_link.die);
+ if (ret == 0)
return __search_die_tree(&new_link, die_cb, data);
else
return 0;
}

-/* Find a locdesc corresponding to the address */
-static int attr_get_locdesc(Dwarf_Attribute attr, Dwarf_Locdesc *desc,
- Dwarf_Addr addr)
-{
- Dwarf_Signed lcnt;
- Dwarf_Locdesc **llbuf;
- int ret, i;
-
- ret = dwarf_loclist_n(attr, &llbuf, &lcnt, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- ret = DW_DLV_NO_ENTRY;
- for (i = 0; i < lcnt; ++i) {
- if (llbuf[i]->ld_lopc <= addr &&
- llbuf[i]->ld_hipc > addr) {
- memcpy(desc, llbuf[i], sizeof(Dwarf_Locdesc));
- desc->ld_s =
- malloc(sizeof(Dwarf_Loc) * llbuf[i]->ld_cents);
- DIE_IF(desc->ld_s == NULL);
- memcpy(desc->ld_s, llbuf[i]->ld_s,
- sizeof(Dwarf_Loc) * llbuf[i]->ld_cents);
- ret = DW_DLV_OK;
- break;
- }
- dwarf_dealloc(__dw_debug, llbuf[i]->ld_s, DW_DLA_LOC_BLOCK);
- dwarf_dealloc(__dw_debug, llbuf[i], DW_DLA_LOCDESC);
- }
- /* Releasing loop */
- for (; i < lcnt; ++i) {
- dwarf_dealloc(__dw_debug, llbuf[i]->ld_s, DW_DLA_LOC_BLOCK);
- dwarf_dealloc(__dw_debug, llbuf[i], DW_DLA_LOCDESC);
- }
- dwarf_dealloc(__dw_debug, llbuf, DW_DLA_LIST);
- return ret;
-}
-
-/* Get decl_file attribute value (file number) */
-static Dwarf_Unsigned die_get_decl_file(Dwarf_Die sp_die)
-{
- Dwarf_Attribute attr;
- Dwarf_Unsigned fno;
- int ret;
-
- ret = dwarf_attr(sp_die, DW_AT_decl_file, &attr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_formudata(attr, &fno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
- return fno;
-}
-
-/* Get decl_line attribute value (line number) */
-static Dwarf_Unsigned die_get_decl_line(Dwarf_Die sp_die)
-{
- Dwarf_Attribute attr;
- Dwarf_Unsigned lno;
- int ret;
-
- ret = dwarf_attr(sp_die, DW_AT_decl_line, &attr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_formudata(attr, &lno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
- return lno;
-}

/*
* Probe finder related functions
*/

/* Show a location */
-static void show_location(Dwarf_Loc *loc, struct probe_finder *pf)
+static void show_location(Dwarf_Op *op, struct probe_finder *pf)
{
- Dwarf_Small op;
- Dwarf_Unsigned regn;
- Dwarf_Signed offs;
+ unsigned int regn;
+ Dwarf_Word offs = 0;
int deref = 0, ret;
const char *regs;

- op = loc->lr_atom;
-
+ /* TODO: support CFA */
/* If this is based on frame buffer, set the offset */
- if (op == DW_OP_fbreg) {
+ if (op->atom == DW_OP_fbreg) {
+ if (pf->fb_ops == NULL)
+ die("The attribute of frame base is not supported.\n");
deref = 1;
- offs = (Dwarf_Signed)loc->lr_number;
- op = pf->fbloc.ld_s[0].lr_atom;
- loc = &pf->fbloc.ld_s[0];
- } else
- offs = 0;
+ offs = op->number;
+ op = &pf->fb_ops[0];
+ }

- if (op >= DW_OP_breg0 && op <= DW_OP_breg31) {
- regn = op - DW_OP_breg0;
- offs += (Dwarf_Signed)loc->lr_number;
+ if (op->atom >= DW_OP_breg0 && op->atom <= DW_OP_breg31) {
+ regn = op->atom - DW_OP_breg0;
+ offs += op->number;
deref = 1;
- } else if (op >= DW_OP_reg0 && op <= DW_OP_reg31) {
- regn = op - DW_OP_reg0;
- } else if (op == DW_OP_bregx) {
- regn = loc->lr_number;
- offs += (Dwarf_Signed)loc->lr_number2;
+ } else if (op->atom >= DW_OP_reg0 && op->atom <= DW_OP_reg31) {
+ regn = op->atom - DW_OP_reg0;
+ } else if (op->atom == DW_OP_bregx) {
+ regn = op->number;
+ offs += op->number2;
deref = 1;
- } else if (op == DW_OP_regx) {
- regn = loc->lr_number;
+ } else if (op->atom == DW_OP_regx) {
+ regn = op->number;
} else
- die("Dwarf_OP %d is not supported.", op);
+ die("DW_OP %d is not supported.", op->atom);

regs = get_arch_regstr(regn);
if (!regs)
- die("%lld exceeds max register number.", regn);
+ die("%u exceeds max register number.", regn);

if (deref)
- ret = snprintf(pf->buf, pf->len,
- " %s=%+lld(%s)", pf->var, offs, regs);
+ ret = snprintf(pf->buf, pf->len, " %s=+%ju(%s)",
+ pf->var, (uintmax_t)offs, regs);
else
ret = snprintf(pf->buf, pf->len, " %s=%s", pf->var, regs);
DIE_IF(ret < 0);
@@ -443,41 +323,41 @@ static void show_location(Dwarf_Loc *loc, struct probe_finder *pf)
}

/* Show a variables in kprobe event format */
-static void show_variable(Dwarf_Die vr_die, struct probe_finder *pf)
+static void show_variable(Dwarf_Die *vr_die, struct probe_finder *pf)
{
Dwarf_Attribute attr;
- Dwarf_Locdesc ld;
+ Dwarf_Op *expr;
+ size_t nexpr;
int ret;

- ret = dwarf_attr(vr_die, DW_AT_location, &attr, &__dw_error);
- if (ret != DW_DLV_OK)
+ if (dwarf_attr(vr_die, DW_AT_location, &attr) == NULL)
goto error;
- ret = attr_get_locdesc(attr, &ld, (pf->addr - pf->cu_base));
- if (ret != DW_DLV_OK)
+ /* TODO: handle more than 1 exprs */
+ ret = dwarf_getlocation_addr(&attr, (pf->addr - pf->cu_base),
+ &expr, &nexpr, 1);
+ if (ret <= 0 || nexpr == 0)
goto error;
- /* TODO? */
- DIE_IF(ld.ld_cents != 1);
- show_location(&ld.ld_s[0], pf);
- free(ld.ld_s);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
+
+ show_location(expr, pf);
+ /* *expr will be cached in libdw. Don't free it. */
return ;
error:
+ /* TODO: Support const_value */
die("Failed to find the location of %s at this address.\n"
" Perhaps, it has been optimized out.", pf->var);
}

-static int variable_callback(struct die_link *dlink, void *data)
+static int variable_search_cb(struct die_link *dlink, void *data)
{
struct probe_finder *pf = (struct probe_finder *)data;
- Dwarf_Half tag;
- int ret;
+ int tag;

- ret = dwarf_tag(dlink->die, &tag, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
+ tag = dwarf_tag(&dlink->die);
+ DIE_IF(tag < 0);
if ((tag == DW_TAG_formal_parameter ||
tag == DW_TAG_variable) &&
- (die_compare_name(dlink->die, pf->var) == 0)) {
- show_variable(dlink->die, pf);
+ (die_compare_name(&dlink->die, pf->var) == 0)) {
+ show_variable(&dlink->die, pf);
return 1;
}
/* TODO: Support struct members and arrays */
@@ -485,7 +365,7 @@ static int variable_callback(struct die_link *dlink, void *data)
}

/* Find a variable in a subprogram die */
-static void find_variable(Dwarf_Die sp_die, struct probe_finder *pf)
+static void find_variable(Dwarf_Die *sp_die, struct probe_finder *pf)
{
int ret;

@@ -499,43 +379,25 @@ static void find_variable(Dwarf_Die sp_die, struct probe_finder *pf)

pr_debug("Searching '%s' variable in context.\n", pf->var);
/* Search child die for local variables and parameters. */
- ret = search_die_from_children(sp_die, variable_callback, pf);
+ ret = search_die_from_children(sp_die, variable_search_cb, pf);
if (!ret)
die("Failed to find '%s' in this function.", pf->var);
}

-/* Get a frame base on the address */
-static void get_current_frame_base(Dwarf_Die sp_die, struct probe_finder *pf)
-{
- Dwarf_Attribute attr;
- int ret;
-
- ret = dwarf_attr(sp_die, DW_AT_frame_base, &attr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- ret = attr_get_locdesc(attr, &pf->fbloc, (pf->addr - pf->cu_base));
- DIE_IF(ret != DW_DLV_OK);
- dwarf_dealloc(__dw_debug, attr, DW_DLA_ATTR);
-}
-
-static void free_current_frame_base(struct probe_finder *pf)
-{
- free(pf->fbloc.ld_s);
- memset(&pf->fbloc, 0, sizeof(Dwarf_Locdesc));
-}
-
/* Show a probe point to output buffer */
-static void show_probe_point(Dwarf_Die sp_die, Dwarf_Signed offs,
+static void show_probe_point(Dwarf_Die *sp_die, size_t offs,
struct probe_finder *pf)
{
struct probe_point *pp = pf->pp;
- char *name;
+ const char *name;
char tmp[MAX_PROBE_BUFFER];
int ret, i, len;
+ Dwarf_Attribute fb_attr;
+ size_t nops;

/* Output name of probe point */
- ret = dwarf_diename(sp_die, &name, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_OK) {
+ name = dwarf_diename(sp_die);
+ if (name) {
ret = snprintf(tmp, MAX_PROBE_BUFFER, "%s+%u", name,
(unsigned int)offs);
/* Copy the function name if possible */
@@ -543,14 +405,14 @@ static void show_probe_point(Dwarf_Die sp_die, Dwarf_Signed offs,
pp->function = strdup(name);
pp->offset = offs;
}
- dwarf_dealloc(__dw_debug, name, DW_DLA_STRING);
} else {
/* This function has no name. */
- ret = snprintf(tmp, MAX_PROBE_BUFFER, "0x%llx", pf->addr);
+ ret = snprintf(tmp, MAX_PROBE_BUFFER, "0x%jx",
+ (uintmax_t)pf->addr);
if (!pp->function) {
/* TODO: Use _stext */
pp->function = strdup("");
- pp->offset = (int)pf->addr;
+ pp->offset = (size_t)pf->addr;
}
}
DIE_IF(ret < 0);
@@ -558,8 +420,15 @@ static void show_probe_point(Dwarf_Die sp_die, Dwarf_Signed offs,
len = ret;
pr_debug("Probe point found: %s\n", tmp);

+ /* Get the frame base attribute/ops */
+ dwarf_attr(sp_die, DW_AT_frame_base, &fb_attr);
+ ret = dwarf_getlocation_addr(&fb_attr, (pf->addr - pf->cu_base),
+ &pf->fb_ops, &nops, 1);
+ if (ret <= 0 || nops == 0)
+ pf->fb_ops = NULL;
+
/* Find each argument */
- get_current_frame_base(sp_die, pf);
+ /* TODO: use dwarf_cfi_addrframe */
for (i = 0; i < pp->nr_args; i++) {
pf->var = pp->args[i];
pf->buf = &tmp[len];
@@ -567,131 +436,106 @@ static void show_probe_point(Dwarf_Die sp_die, Dwarf_Signed offs,
find_variable(sp_die, pf);
len += strlen(pf->buf);
}
- free_current_frame_base(pf);
+
+ /* *pf->fb_ops will be cached in libdw. Don't free it. */
+ pf->fb_ops = NULL;

pp->probes[pp->found] = strdup(tmp);
pp->found++;
}

-static int probeaddr_callback(struct die_link *dlink, void *data)
-{
- struct probe_finder *pf = (struct probe_finder *)data;
- Dwarf_Half tag;
- Dwarf_Signed offs;
- int ret;
-
- ret = dwarf_tag(dlink->die, &tag, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- /* Check the address is in this subprogram */
- if (tag == DW_TAG_subprogram &&
- die_within_subprogram(dlink->die, pf->addr, &offs)) {
- show_probe_point(dlink->die, offs, pf);
- return 1;
- }
- return 0;
-}
-
/* Find probe point from its line number */
static void find_probe_point_by_line(struct probe_finder *pf)
{
- Dwarf_Signed cnt, i, clm;
- Dwarf_Line *lines;
- Dwarf_Unsigned lineno = 0;
- Dwarf_Addr addr;
- Dwarf_Unsigned fno;
+ Dwarf_Lines *lines;
+ Dwarf_Line *line;
+ size_t nlines, i;
+ Dwarf_Addr addr, epc;
+ int lineno;
int ret;
+ Dwarf_Die *sp_die, die_mem;

- ret = dwarf_srclines(pf->cu_die, &lines, &cnt, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
-
- for (i = 0; i < cnt; i++) {
- ret = dwarf_line_srcfileno(lines[i], &fno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- if (fno != pf->fno)
- continue;
+ ret = dwarf_getsrclines(&pf->cu_die, &lines, &nlines);
+ DIE_IF(ret != 0);

- ret = dwarf_lineno(lines[i], &lineno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ for (i = 0; i < nlines; i++) {
+ line = dwarf_onesrcline(lines, i);
+ dwarf_lineno(line, &lineno);
if (lineno != pf->lno)
continue;

- ret = dwarf_lineoff(lines[i], &clm, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ /* TODO: Get fileno from line, but how? */
+ if (strtailcmp(dwarf_linesrc(line, NULL, NULL), pf->fname) != 0)
+ continue;

- ret = dwarf_lineaddr(lines[i], &addr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- pr_debug("Probe line found: line[%d]:%u,%d addr:0x%llx\n",
- (int)i, (unsigned)lineno, (int)clm, addr);
+ ret = dwarf_lineaddr(line, &addr);
+ DIE_IF(ret != 0);
+ pr_debug("Probe line found: line[%d]:%d addr:0x%jx\n",
+ (int)i, lineno, (uintmax_t)addr);
pf->addr = addr;
- /* Search a real subprogram including this line, */
- ret = search_die_from_children(pf->cu_die,
- probeaddr_callback, pf);
- if (ret == 0)
+
+ sp_die = die_get_real_subprogram(&pf->cu_die, addr, &die_mem);
+ if (!sp_die)
die("Probe point is not found in subprograms.");
+ dwarf_entrypc(sp_die, &epc);
+ show_probe_point(sp_die, (size_t)(addr - epc), pf);
/* Continuing, because target line might be inlined. */
}
- dwarf_srclines_dealloc(__dw_debug, lines, cnt);
}

+
/* Search function from function name */
-static int probefunc_callback(struct die_link *dlink, void *data)
+static int probe_point_search_cb(struct die_link *dlink, void *data)
{
struct probe_finder *pf = (struct probe_finder *)data;
struct probe_point *pp = pf->pp;
struct die_link *lk;
- Dwarf_Signed offs;
- Dwarf_Half tag;
+ size_t offs;
+ int tag;
int ret;

- ret = dwarf_tag(dlink->die, &tag, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
+ tag = dwarf_tag(&dlink->die);
if (tag == DW_TAG_subprogram) {
- if (die_compare_name(dlink->die, pp->function) == 0) {
+ if (die_compare_name(&dlink->die, pp->function) == 0) {
if (pp->line) { /* Function relative line */
- pf->fno = die_get_decl_file(dlink->die);
- pf->lno = die_get_decl_line(dlink->die)
- + pp->line;
+ pf->fname = dwarf_decl_file(&dlink->die);
+ dwarf_decl_line(&dlink->die, &pf->lno);
+ pf->lno += pp->line;
find_probe_point_by_line(pf);
return 1;
}
- if (die_inlined_subprogram(dlink->die)) {
+ if (dwarf_func_inline(&dlink->die)) {
/* Inlined function, save it. */
- ret = dwarf_die_CU_offset(dlink->die,
- &pf->inl_offs,
- &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- pr_debug("inline definition offset %lld\n",
- pf->inl_offs);
+ pf->origin = dlink->die.addr;
return 0; /* Continue to search */
}
/* Get probe address */
- pf->addr = die_get_entrypc(dlink->die);
+ pf->addr = die_get_entrypc(&dlink->die);
pf->addr += pp->offset;
/* TODO: Check the address in this function */
- show_probe_point(dlink->die, pp->offset, pf);
+ show_probe_point(&dlink->die, pp->offset, pf);
return 1; /* Exit; no same symbol in this CU. */
}
- } else if (tag == DW_TAG_inlined_subroutine && pf->inl_offs) {
- if (die_get_abstract_origin(dlink->die) == pf->inl_offs) {
+ } else if (tag == DW_TAG_inlined_subroutine && pf->origin) {
+ if (die_compare_abstract_origin(&dlink->die, pf->origin)) {
/* Get probe address */
- pf->addr = die_get_entrypc(dlink->die);
+ pf->addr = die_get_entrypc(&dlink->die);
pf->addr += pp->offset;
- pr_debug("found inline addr: 0x%llx\n", pf->addr);
+ pr_debug("found inline addr: 0x%jx\n",
+ (uintmax_t)pf->addr);
/* Inlined function. Get a real subprogram */
for (lk = dlink->parent; lk != NULL; lk = lk->parent) {
- tag = 0;
- dwarf_tag(lk->die, &tag, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
+ tag = dwarf_tag(&lk->die);
if (tag == DW_TAG_subprogram &&
- !die_inlined_subprogram(lk->die))
+ !dwarf_func_inline(&lk->die))
goto found;
}
die("Failed to find real subprogram.");
found:
/* Get offset from subprogram */
- ret = die_within_subprogram(lk->die, pf->addr, &offs);
+ ret = die_within_subprogram(&lk->die, pf->addr, &offs);
DIE_IF(!ret);
- show_probe_point(lk->die, offs, pf);
+ show_probe_point(&lk->die, offs, pf);
/* Continue to search */
}
}
@@ -700,43 +544,43 @@ found:

static void find_probe_point_by_func(struct probe_finder *pf)
{
- search_die_from_children(pf->cu_die, probefunc_callback, pf);
+ search_die_from_children(&pf->cu_die, probe_point_search_cb, pf);
}

/* Find a probe point */
int find_probe_point(int fd, struct probe_point *pp)
{
- Dwarf_Half addr_size = 0;
- Dwarf_Unsigned next_cuh = 0;
- int cu_number = 0, ret;
struct probe_finder pf = {.pp = pp};
-
- ret = dwarf_init(fd, DW_DLC_READ, 0, 0, &__dw_debug, &__dw_error);
- if (ret != DW_DLV_OK)
+ int ret;
+ Dwarf_Off off, noff;
+ size_t cuhl;
+ Dwarf_Die *diep;
+ Dwarf *dbg;
+ int fno = 0;
+
+ dbg = dwarf_begin(fd, DWARF_C_READ);
+ if (!dbg)
return -ENOENT;

pp->found = 0;
- while (++cu_number) {
- /* Search CU (Compilation Unit) */
- ret = dwarf_next_cu_header(__dw_debug, NULL, NULL, NULL,
- &addr_size, &next_cuh, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_NO_ENTRY)
- break;
-
+ off = 0;
+ /* Loop on CUs (Compilation Unit) */
+ while (!dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL)) {
/* Get the DIE(Debugging Information Entry) of this CU */
- ret = dwarf_siblingof(__dw_debug, 0, &pf.cu_die, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ diep = dwarf_offdie(dbg, off + cuhl, &pf.cu_die);
+ if (!diep)
+ continue;

/* Check if target file is included. */
if (pp->file)
- pf.fno = cu_find_fileno(pf.cu_die, pp->file);
+ fno = cu_find_fileno(&pf.cu_die, pp->file);
+ else
+ fno = 0;

- if (!pp->file || pf.fno) {
+ if (!pp->file || fno) {
/* Save CU base address (for frame_base) */
- ret = dwarf_lowpc(pf.cu_die, &pf.cu_base, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_NO_ENTRY)
+ ret = dwarf_lowpc(&pf.cu_die, &pf.cu_base);
+ if (ret != 0)
pf.cu_base = 0;
if (pp->function)
find_probe_point_by_func(&pf);
@@ -745,10 +589,9 @@ int find_probe_point(int fd, struct probe_point *pp)
find_probe_point_by_line(&pf);
}
}
- dwarf_dealloc(__dw_debug, pf.cu_die, DW_DLA_DIE);
+ off = noff;
}
- ret = dwarf_finish(__dw_debug, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ dwarf_end(dbg);

return pp->found;
}
@@ -781,69 +624,76 @@ found:
/* Find line range from its line number */
static void find_line_range_by_line(struct line_finder *lf)
{
- Dwarf_Signed cnt, i;
- Dwarf_Line *lines;
- Dwarf_Unsigned lineno = 0;
- Dwarf_Unsigned fno;
+ Dwarf_Lines *lines;
+ Dwarf_Line *line;
+ size_t nlines, i;
Dwarf_Addr addr;
+ int lineno;
int ret;
+ const char *src;

INIT_LIST_HEAD(&lf->lr->line_list);
- ret = dwarf_srclines(lf->cu_die, &lines, &cnt, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ ret = dwarf_getsrclines(&lf->cu_die, &lines, &nlines);
+ DIE_IF(ret != 0);

- for (i = 0; i < cnt; i++) {
- ret = dwarf_line_srcfileno(lines[i], &fno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- if (fno != lf->fno)
+ for (i = 0; i < nlines; i++) {
+ line = dwarf_onesrcline(lines, i);
+ dwarf_lineno(line, &lineno);
+ if (lf->lno_s > lineno || lf->lno_e < lineno)
continue;

- ret = dwarf_lineno(lines[i], &lineno, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
- if (lf->lno_s > lineno || lf->lno_e < lineno)
+ /* TODO: Get fileno from line, but how? */
+ src = dwarf_linesrc(line, NULL, NULL);
+ if (strtailcmp(src, lf->fname) != 0)
continue;

/* Filter line in the function address range */
if (lf->addr_s && lf->addr_e) {
- ret = dwarf_lineaddr(lines[i], &addr, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ ret = dwarf_lineaddr(line, &addr);
+ DIE_IF(ret != 0);
if (lf->addr_s > addr || lf->addr_e <= addr)
continue;
}
+ /* Copy real path */
+ if (!lf->lr->path)
+ lf->lr->path = strdup(src);
line_range_add_line(lf->lr, (unsigned int)lineno);
}
- dwarf_srclines_dealloc(__dw_debug, lines, cnt);
+ /* Update status */
if (!list_empty(&lf->lr->line_list))
lf->found = 1;
+ else {
+ free(lf->lr->path);
+ lf->lr->path = NULL;
+ }
}

/* Search function from function name */
-static int linefunc_callback(struct die_link *dlink, void *data)
+static int line_range_search_cb(struct die_link *dlink, void *data)
{
struct line_finder *lf = (struct line_finder *)data;
struct line_range *lr = lf->lr;
- Dwarf_Half tag;
+ int tag;
int ret;

- ret = dwarf_tag(dlink->die, &tag, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
+ tag = dwarf_tag(&dlink->die);
if (tag == DW_TAG_subprogram &&
- die_compare_name(dlink->die, lr->function) == 0) {
+ die_compare_name(&dlink->die, lr->function) == 0) {
/* Get the address range of this function */
- ret = dwarf_highpc(dlink->die, &lf->addr_e, &__dw_error);
- if (ret == DW_DLV_OK)
- ret = dwarf_lowpc(dlink->die, &lf->addr_s, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_NO_ENTRY) {
+ ret = dwarf_highpc(&dlink->die, &lf->addr_e);
+ if (ret == 0)
+ ret = dwarf_lowpc(&dlink->die, &lf->addr_s);
+ if (ret != 0) {
lf->addr_s = 0;
lf->addr_e = 0;
}

- lf->fno = die_get_decl_file(dlink->die);
- lr->offset = die_get_decl_line(dlink->die);;
+ lf->fname = dwarf_decl_file(&dlink->die);
+ dwarf_decl_line(&dlink->die, &lr->offset);
+ pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
lf->lno_s = lr->offset + lr->start;
if (!lr->end)
- lf->lno_e = (Dwarf_Unsigned)-1;
+ lf->lno_e = INT_MAX;
else
lf->lno_e = lr->offset + lr->end;
lr->start = lf->lno_s;
@@ -856,55 +706,57 @@ static int linefunc_callback(struct die_link *dlink, void *data)

static void find_line_range_by_func(struct line_finder *lf)
{
- search_die_from_children(lf->cu_die, linefunc_callback, lf);
+ search_die_from_children(&lf->cu_die, line_range_search_cb, lf);
}

int find_line_range(int fd, struct line_range *lr)
{
- Dwarf_Half addr_size = 0;
- Dwarf_Unsigned next_cuh = 0;
+ struct line_finder lf = {.lr = lr, .found = 0};
int ret;
- struct line_finder lf = {.lr = lr};
-
- ret = dwarf_init(fd, DW_DLC_READ, 0, 0, &__dw_debug, &__dw_error);
- if (ret != DW_DLV_OK)
+ Dwarf_Off off = 0, noff;
+ size_t cuhl;
+ Dwarf_Die *diep;
+ Dwarf *dbg;
+ int fno;
+
+ dbg = dwarf_begin(fd, DWARF_C_READ);
+ if (!dbg)
return -ENOENT;

+ /* Loop on CUs (Compilation Unit) */
while (!lf.found) {
- /* Search CU (Compilation Unit) */
- ret = dwarf_next_cu_header(__dw_debug, NULL, NULL, NULL,
- &addr_size, &next_cuh, &__dw_error);
- DIE_IF(ret == DW_DLV_ERROR);
- if (ret == DW_DLV_NO_ENTRY)
+ ret = dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL);
+ if (ret != 0)
break;

/* Get the DIE(Debugging Information Entry) of this CU */
- ret = dwarf_siblingof(__dw_debug, 0, &lf.cu_die, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ diep = dwarf_offdie(dbg, off + cuhl, &lf.cu_die);
+ if (!diep)
+ continue;

/* Check if target file is included. */
if (lr->file)
- lf.fno = cu_find_fileno(lf.cu_die, lr->file);
+ fno = cu_find_fileno(&lf.cu_die, lr->file);
+ else
+ fno = 0;

- if (!lr->file || lf.fno) {
+ if (!lr->file || fno) {
if (lr->function)
find_line_range_by_func(&lf);
else {
+ lf.fname = lr->file;
lf.lno_s = lr->start;
if (!lr->end)
- lf.lno_e = (Dwarf_Unsigned)-1;
+ lf.lno_e = INT_MAX;
else
lf.lno_e = lr->end;
find_line_range_by_line(&lf);
}
- /* Get the real file path */
- if (lf.found)
- cu_get_filename(lf.cu_die, lf.fno, &lr->path);
}
- dwarf_dealloc(__dw_debug, lf.cu_die, DW_DLA_DIE);
+ off = noff;
}
- ret = dwarf_finish(__dw_debug, &__dw_error);
- DIE_IF(ret != DW_DLV_OK);
+ pr_debug("path: %lx\n", (unsigned long)lr->path);
+ dwarf_end(dbg);
return lf.found;
}

diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index b2a2524..9dd4a88 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -1,6 +1,7 @@
#ifndef _PROBE_FINDER_H
#define _PROBE_FINDER_H

+#include <stdbool.h>
#include "util.h"

#define MAX_PATH_LEN 256
@@ -46,53 +47,48 @@ struct line_range {
char *function; /* Function name */
unsigned int start; /* Start line number */
unsigned int end; /* End line number */
- unsigned int offset; /* Start line offset */
+ int offset; /* Start line offset */
char *path; /* Real path name */
struct list_head line_list; /* Visible lines */
};

-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
extern int find_probe_point(int fd, struct probe_point *pp);
extern int find_line_range(int fd, struct line_range *lr);

-/* Workaround for undefined _MIPS_SZLONG bug in libdwarf.h: */
-#ifndef _MIPS_SZLONG
-# define _MIPS_SZLONG 0
-#endif
-
#include <dwarf.h>
-#include <libdwarf.h>
+#include <libdw.h>

struct probe_finder {
- struct probe_point *pp; /* Target probe point */
+ struct probe_point *pp; /* Target probe point */

/* For function searching */
- Dwarf_Addr addr; /* Address */
- Dwarf_Unsigned fno; /* File number */
- Dwarf_Unsigned lno; /* Line number */
- Dwarf_Off inl_offs; /* Inline offset */
- Dwarf_Die cu_die; /* Current CU */
+ Dwarf_Addr addr; /* Address */
+ const char *fname; /* File name */
+ int lno; /* Line number */
+ void *origin; /* Inline origin addr */
+ Dwarf_Die cu_die; /* Current CU */

/* For variable searching */
- Dwarf_Addr cu_base; /* Current CU base address */
- Dwarf_Locdesc fbloc; /* Location of Current Frame Base */
- const char *var; /* Current variable name */
- char *buf; /* Current output buffer */
- int len; /* Length of output buffer */
+ Dwarf_Op *fb_ops; /* Frame base attribute */
+ Dwarf_Addr cu_base; /* Current CU base address */
+ const char *var; /* Current variable name */
+ char *buf; /* Current output buffer */
+ int len; /* Length of output buffer */
};

struct line_finder {
- struct line_range *lr; /* Target line range */
-
- Dwarf_Unsigned fno; /* File number */
- Dwarf_Unsigned lno_s; /* Start line number */
- Dwarf_Unsigned lno_e; /* End line number */
- Dwarf_Addr addr_s; /* Start address */
- Dwarf_Addr addr_e; /* End address */
- Dwarf_Die cu_die; /* Current CU */
+ struct line_range *lr; /* Target line range */
+
+ const char *fname; /* File name */
+ int lno_s; /* Start line number */
+ int lno_e; /* End line number */
+ Dwarf_Addr addr_s; /* Start address */
+ Dwarf_Addr addr_e; /* End address */
+ Dwarf_Die cu_die; /* Current CU */
int found;
};

-#endif /* NO_LIBDWARF */
+#endif /* NO_DWARF_SUPPORT */

#endif /*_PROBE_FINDER_H */

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  Last update: 2010-02-25 20:35    [W:0.731 / U:0.448 seconds]
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