From 3cb8bc6ac95ff86147d11ee1d36d18e1ddf3637c Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:35:27 -0500
Subject: perf probe: Fix bugs in line range finder
Fix find_line_range_by_line() to init line_list and remove
misconseptional found marking which should be done when
real lines are found (if there is no lines probe-able,
find_line_range() should return 0).
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: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
LKML-Reference: <20100225133527.6725.52418.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 1b2124d12f6..3e10dbe22ab 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -788,6 +788,7 @@ static void find_line_range_by_line(struct line_finder *lf)
Dwarf_Addr addr;
int ret;
+ INIT_LIST_HEAD(&lf->lr->line_list);
ret = dwarf_srclines(lf->cu_die, &lines, &cnt, &__dw_error);
DIE_IF(ret != DW_DLV_OK);
@@ -848,8 +849,6 @@ static int linefunc_callback(struct die_link *dlink, void *data)
lr->start = lf->lno_s;
lr->end = lf->lno_e;
find_line_range_by_line(lf);
- /* If we find a target function, this should be end. */
- lf->found = 1;
return 1;
}
return 0;
--
cgit v1.2.3-18-g5258
From 81cb8aa327b5923b38eccc795c8b7170be20b9ff Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:35:34 -0500
Subject: perf probe: Rename probe finder functions
Rename *_probepoint to *_probe_point, for nothing
but a cosmetic reason.
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: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
LKML-Reference: <20100225133534.6725.52615.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 12 ++++++------
tools/perf/util/probe-finder.h | 2 +-
2 files changed, 7 insertions(+), 7 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 3e10dbe22ab..c819fd59da9 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -524,8 +524,8 @@ static void free_current_frame_base(struct probe_finder *pf)
}
/* Show a probe point to output buffer */
-static void show_probepoint(Dwarf_Die sp_die, Dwarf_Signed offs,
- struct probe_finder *pf)
+static void show_probe_point(Dwarf_Die sp_die, Dwarf_Signed offs,
+ struct probe_finder *pf)
{
struct probe_point *pp = pf->pp;
char *name;
@@ -585,7 +585,7 @@ static int probeaddr_callback(struct die_link *dlink, void *data)
/* Check the address is in this subprogram */
if (tag == DW_TAG_subprogram &&
die_within_subprogram(dlink->die, pf->addr, &offs)) {
- show_probepoint(dlink->die, offs, pf);
+ show_probe_point(dlink->die, offs, pf);
return 1;
}
return 0;
@@ -668,7 +668,7 @@ static int probefunc_callback(struct die_link *dlink, void *data)
pf->addr = die_get_entrypc(dlink->die);
pf->addr += pp->offset;
/* TODO: Check the address in this function */
- show_probepoint(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) {
@@ -691,7 +691,7 @@ found:
/* Get offset from subprogram */
ret = die_within_subprogram(lk->die, pf->addr, &offs);
DIE_IF(!ret);
- show_probepoint(lk->die, offs, pf);
+ show_probe_point(lk->die, offs, pf);
/* Continue to search */
}
}
@@ -704,7 +704,7 @@ static void find_probe_point_by_func(struct probe_finder *pf)
}
/* Find a probe point */
-int find_probepoint(int fd, struct probe_point *pp)
+int find_probe_point(int fd, struct probe_point *pp)
{
Dwarf_Half addr_size = 0;
Dwarf_Unsigned next_cuh = 0;
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 972b386116f..b2a25241135 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -52,7 +52,7 @@ struct line_range {
};
#ifndef NO_LIBDWARF
-extern int find_probepoint(int fd, struct probe_point *pp);
+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: */
--
cgit v1.2.3-18-g5258
From 804b36068eccd8163ccea420c662fb5d1a21b141 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:35:42 -0500
Subject: 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/util/probe-finder.c | 696 ++++++++++++++++-------------------------
tools/perf/util/probe-finder.h | 52 ++-
2 files changed, 298 insertions(+), 450 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index c819fd59da9..c422472fe4d 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 b2a25241135..9dd4a884d0e 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 */
--
cgit v1.2.3-18-g5258
From e92b85e1ffaa0bd8e5d92e7c378a3909e7f23122 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:35:50 -0500
Subject: perf probe: Use libdw callback routines
Use libdw callback functions aggressively, and remove
local tree-search API. This change simplifies the code.
Changes in v3:
- Cast Dwarf_Addr to uintmax_t for printf-formats.
Changes in v2:
- Cast Dwarf_Addr 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: <20100225133549.6725.81499.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 262 ++++++++++++++---------------------------
tools/perf/util/probe-finder.h | 1 -
2 files changed, 86 insertions(+), 177 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index c422472fe4d..6305f344f38 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -38,13 +38,6 @@
#include "probe-finder.h"
-/* Dwarf_Die Linkage to parent Die */
-struct die_link {
- struct die_link *parent; /* Parent die */
- Dwarf_Die die; /* Current die */
-};
-
-
/*
* Generic dwarf analysis helpers
*/
@@ -177,26 +170,6 @@ static bool die_compare_name(Dwarf_Die *dw_die, const char *tname)
return strcmp(tname, name);
}
-/* Check the address is in the subprogram(function). */
-static bool die_within_subprogram(Dwarf_Die *sp_die, Dwarf_Addr addr,
- size_t *offs)
-{
- Dwarf_Addr epc;
- int ret;
-
- ret = dwarf_haspc(sp_die, addr);
- if (ret <= 0)
- return false;
-
- if (offs) {
- ret = dwarf_entrypc(sp_die, &epc);
- DIE_IF(ret == -1);
- *offs = addr - epc;
- }
-
- return true;
-}
-
/* Get entry pc(or low pc, 1st entry of ranges) of the die */
static Dwarf_Addr die_get_entrypc(Dwarf_Die *dw_die)
{
@@ -208,70 +181,34 @@ static Dwarf_Addr die_get_entrypc(Dwarf_Die *dw_die)
return epc;
}
-/* 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_Die origin;
-
- if (!dwarf_attr(in_die, DW_AT_abstract_origin, &attr))
- return false;
- if (!dwarf_formref_die(&attr, &origin))
- return false;
-
- return origin.addr == origin_addr;
-}
-
-/*
- * Search a Die from Die tree.
- * Note: cur_link->die should be deallocated in this function.
- */
-static int __search_die_tree(struct die_link *cur_link,
- int (*die_cb)(struct die_link *, void *),
- void *data)
+/* Get a variable die */
+static Dwarf_Die *die_find_variable(Dwarf_Die *sp_die, const char *name,
+ Dwarf_Die *die_mem)
{
- struct die_link new_link;
+ Dwarf_Die child_die;
+ int tag;
int ret;
- if (!die_cb)
- return 0;
-
- /* Check current die */
- while (!(ret = die_cb(cur_link, data))) {
- /* Check child die */
- ret = dwarf_child(&cur_link->die, &new_link.die);
- if (ret == 0) {
- new_link.parent = cur_link;
- ret = __search_die_tree(&new_link, die_cb, data);
- if (ret)
- break;
- }
+ ret = dwarf_child(sp_die, die_mem);
+ if (ret != 0)
+ return NULL;
- /* Move to next sibling */
- ret = dwarf_siblingof(&cur_link->die, &cur_link->die);
- if (ret != 0)
- return 0;
- }
- return ret;
-}
+ do {
+ tag = dwarf_tag(die_mem);
+ if ((tag == DW_TAG_formal_parameter ||
+ tag == DW_TAG_variable) &&
+ (die_compare_name(die_mem, name) == 0))
+ return die_mem;
-/* Search a die in its children's die tree */
-static int search_die_from_children(Dwarf_Die *parent_die,
- int (*die_cb)(struct die_link *, void *),
- void *data)
-{
- struct die_link new_link;
- int ret;
+ if (die_find_variable(die_mem, name, &child_die)) {
+ memcpy(die_mem, &child_die, sizeof(Dwarf_Die));
+ return die_mem;
+ }
+ } while (dwarf_siblingof(die_mem, die_mem) == 0);
- new_link.parent = NULL;
- ret = dwarf_child(parent_die, &new_link.die);
- if (ret == 0)
- return __search_die_tree(&new_link, die_cb, data);
- else
- return 0;
+ return NULL;
}
-
/*
* Probe finder related functions
*/
@@ -347,28 +284,13 @@ error:
" Perhaps, it has been optimized out.", pf->var);
}
-static int variable_search_cb(struct die_link *dlink, void *data)
-{
- struct probe_finder *pf = (struct probe_finder *)data;
- int tag;
-
- 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);
- return 1;
- }
- /* TODO: Support struct members and arrays */
- return 0;
-}
-
/* Find a variable in a subprogram die */
static void find_variable(Dwarf_Die *sp_die, struct probe_finder *pf)
{
int ret;
+ Dwarf_Die vr_die;
+ /* TODO: Support struct members and arrays */
if (!is_c_varname(pf->var)) {
/* Output raw parameters */
ret = snprintf(pf->buf, pf->len, " %s", pf->var);
@@ -379,31 +301,42 @@ 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_search_cb, pf);
- if (!ret)
+ if (!die_find_variable(sp_die, pf->var, &vr_die))
die("Failed to find '%s' in this function.", pf->var);
+
+ show_variable(&vr_die, pf);
}
/* Show a probe point to output buffer */
-static void show_probe_point(Dwarf_Die *sp_die, size_t offs,
- struct probe_finder *pf)
+static void show_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
{
struct probe_point *pp = pf->pp;
+ Dwarf_Addr eaddr;
+ Dwarf_Die die_mem;
const char *name;
char tmp[MAX_PROBE_BUFFER];
int ret, i, len;
Dwarf_Attribute fb_attr;
size_t nops;
+ /* If no real subprogram, find a real one */
+ if (!sp_die || dwarf_tag(sp_die) != DW_TAG_subprogram) {
+ sp_die = die_get_real_subprogram(&pf->cu_die,
+ pf->addr, &die_mem);
+ if (!sp_die)
+ die("Probe point is not found in subprograms.");
+ }
+
/* Output name of probe point */
name = dwarf_diename(sp_die);
if (name) {
- ret = snprintf(tmp, MAX_PROBE_BUFFER, "%s+%u", name,
- (unsigned int)offs);
+ dwarf_entrypc(sp_die, &eaddr);
+ ret = snprintf(tmp, MAX_PROBE_BUFFER, "%s+%lu", name,
+ (unsigned long)(pf->addr - eaddr));
/* Copy the function name if possible */
if (!pp->function) {
pp->function = strdup(name);
- pp->offset = offs;
+ pp->offset = (size_t)(pf->addr - eaddr);
}
} else {
/* This function has no name. */
@@ -450,10 +383,9 @@ static void find_probe_point_by_line(struct probe_finder *pf)
Dwarf_Lines *lines;
Dwarf_Line *line;
size_t nlines, i;
- Dwarf_Addr addr, epc;
+ Dwarf_Addr addr;
int lineno;
int ret;
- Dwarf_Die *sp_die, die_mem;
ret = dwarf_getsrclines(&pf->cu_die, &lines, &nlines);
DIE_IF(ret != 0);
@@ -474,77 +406,57 @@ static void find_probe_point_by_line(struct probe_finder *pf)
(int)i, lineno, (uintmax_t)addr);
pf->addr = addr;
- 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);
+ show_probe_point(NULL, pf);
/* Continuing, because target line might be inlined. */
}
}
+static int probe_point_inline_cb(Dwarf_Die *in_die, void *data)
+{
+ struct probe_finder *pf = (struct probe_finder *)data;
+ struct probe_point *pp = pf->pp;
+
+ /* Get probe address */
+ pf->addr = die_get_entrypc(in_die);
+ pf->addr += pp->offset;
+ pr_debug("found inline addr: 0x%jx\n", (uintmax_t)pf->addr);
+
+ show_probe_point(in_die, pf);
+ return DWARF_CB_OK;
+}
/* Search function from function name */
-static int probe_point_search_cb(struct die_link *dlink, void *data)
+static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
{
struct probe_finder *pf = (struct probe_finder *)data;
struct probe_point *pp = pf->pp;
- struct die_link *lk;
- size_t offs;
- int tag;
- int ret;
- tag = dwarf_tag(&dlink->die);
- if (tag == DW_TAG_subprogram) {
- if (die_compare_name(&dlink->die, pp->function) == 0) {
- if (pp->line) { /* Function relative 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 (dwarf_func_inline(&dlink->die)) {
- /* Inlined function, save it. */
- pf->origin = dlink->die.addr;
- return 0; /* Continue to search */
- }
- /* Get probe address */
- 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);
- return 1; /* Exit; no same symbol in this CU. */
- }
- } 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 += pp->offset;
- 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 = dwarf_tag(&lk->die);
- if (tag == DW_TAG_subprogram &&
- !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);
- DIE_IF(!ret);
- show_probe_point(&lk->die, offs, pf);
- /* Continue to search */
- }
- }
- return 0;
+ /* Check tag and diename */
+ if (dwarf_tag(sp_die) != DW_TAG_subprogram ||
+ die_compare_name(sp_die, pp->function) != 0)
+ return 0;
+
+ if (pp->line) { /* Function relative line */
+ pf->fname = dwarf_decl_file(sp_die);
+ dwarf_decl_line(sp_die, &pf->lno);
+ pf->lno += pp->line;
+ find_probe_point_by_line(pf);
+ } else if (!dwarf_func_inline(sp_die)) {
+ /* Real function */
+ pf->addr = die_get_entrypc(sp_die);
+ pf->addr += pp->offset;
+ /* TODO: Check the address in this function */
+ show_probe_point(sp_die, pf);
+ } else
+ /* Inlined function: search instances */
+ dwarf_func_inline_instances(sp_die, probe_point_inline_cb, pf);
+
+ return 1; /* Exit; no same symbol in this CU. */
}
static void find_probe_point_by_func(struct probe_finder *pf)
{
- search_die_from_children(&pf->cu_die, probe_point_search_cb, pf);
+ dwarf_getfuncs(&pf->cu_die, probe_point_search_cb, pf, 0);
}
/* Find a probe point */
@@ -669,27 +581,25 @@ static void find_line_range_by_line(struct line_finder *lf)
}
/* Search function from function name */
-static int line_range_search_cb(struct die_link *dlink, void *data)
+static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
{
struct line_finder *lf = (struct line_finder *)data;
struct line_range *lr = lf->lr;
- int tag;
int ret;
- tag = dwarf_tag(&dlink->die);
- if (tag == DW_TAG_subprogram &&
- die_compare_name(&dlink->die, lr->function) == 0) {
+ if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
+ die_compare_name(sp_die, lr->function) == 0) {
/* Get the address range of this function */
- ret = dwarf_highpc(&dlink->die, &lf->addr_e);
+ ret = dwarf_highpc(sp_die, &lf->addr_e);
if (ret == 0)
- ret = dwarf_lowpc(&dlink->die, &lf->addr_s);
+ ret = dwarf_lowpc(sp_die, &lf->addr_s);
if (ret != 0) {
lf->addr_s = 0;
lf->addr_e = 0;
}
- lf->fname = dwarf_decl_file(&dlink->die);
- dwarf_decl_line(&dlink->die, &lr->offset);
+ lf->fname = dwarf_decl_file(sp_die);
+ dwarf_decl_line(sp_die, &lr->offset);
pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
lf->lno_s = lr->offset + lr->start;
if (!lr->end)
@@ -706,7 +616,7 @@ static int line_range_search_cb(struct die_link *dlink, void *data)
static void find_line_range_by_func(struct line_finder *lf)
{
- search_die_from_children(&lf->cu_die, line_range_search_cb, lf);
+ dwarf_getfuncs(&lf->cu_die, line_range_search_cb, lf, 0);
}
int find_line_range(int fd, struct line_range *lr)
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 9dd4a884d0e..74525aeb30f 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -66,7 +66,6 @@ struct probe_finder {
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 */
--
cgit v1.2.3-18-g5258
From 161a26b0c231b5d2e60e9c132fa360cd9dac4720 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:35:57 -0500
Subject: perf probe: Check function address range strictly in line finder
Check (inlined) function address range strictly for
improving output of probe-able lines of inline functions.
Without this change, perf probe --line <function> sometimes
showed other inline function bodies too, because it didn't
filter out inlined functions.
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: <20100225133557.6725.20697.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 74 ++++++++++++++++++++++++++++++------------
tools/perf/util/probe-finder.h | 2 --
2 files changed, 53 insertions(+), 23 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 6305f344f38..a41035634dd 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -161,6 +161,31 @@ static Dwarf_Die *die_get_real_subprogram(Dwarf_Die *cu_die, Dwarf_Addr addr,
return die_mem;
}
+/* Similar to dwarf_getfuncs, but returns inlined_subroutine if exists. */
+static Dwarf_Die *die_get_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
+ Dwarf_Die *die_mem)
+{
+ Dwarf_Die child_die;
+ int ret;
+
+ ret = dwarf_child(sp_die, die_mem);
+ if (ret != 0)
+ return NULL;
+
+ do {
+ if (dwarf_tag(die_mem) == DW_TAG_inlined_subroutine &&
+ dwarf_haspc(die_mem, addr))
+ return die_mem;
+
+ if (die_get_inlinefunc(die_mem, addr, &child_die)) {
+ memcpy(die_mem, &child_die, sizeof(Dwarf_Die));
+ return die_mem;
+ }
+ } while (dwarf_siblingof(die_mem, die_mem) == 0);
+
+ return NULL;
+}
+
/* Compare diename and tname */
static bool die_compare_name(Dwarf_Die *dw_die, const char *tname)
{
@@ -534,7 +559,7 @@ found:
}
/* Find line range from its line number */
-static void find_line_range_by_line(struct line_finder *lf)
+static void find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
{
Dwarf_Lines *lines;
Dwarf_Line *line;
@@ -543,6 +568,7 @@ static void find_line_range_by_line(struct line_finder *lf)
int lineno;
int ret;
const char *src;
+ Dwarf_Die die_mem;
INIT_LIST_HEAD(&lf->lr->line_list);
ret = dwarf_getsrclines(&lf->cu_die, &lines, &nlines);
@@ -550,22 +576,28 @@ static void find_line_range_by_line(struct line_finder *lf)
for (i = 0; i < nlines; i++) {
line = dwarf_onesrcline(lines, i);
- dwarf_lineno(line, &lineno);
+ ret = dwarf_lineno(line, &lineno);
+ DIE_IF(ret != 0);
if (lf->lno_s > lineno || lf->lno_e < lineno)
continue;
+ if (sp_die) {
+ /* Address filtering 1: does sp_die include addr? */
+ ret = dwarf_lineaddr(line, &addr);
+ DIE_IF(ret != 0);
+ if (!dwarf_haspc(sp_die, addr))
+ continue;
+
+ /* Address filtering 2: No child include addr? */
+ if (die_get_inlinefunc(sp_die, addr, &die_mem))
+ continue;
+ }
+
/* 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(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);
@@ -580,24 +612,20 @@ static void find_line_range_by_line(struct line_finder *lf)
}
}
+static int line_range_inline_cb(Dwarf_Die *in_die, void *data)
+{
+ find_line_range_by_line(in_die, (struct line_finder *)data);
+ return DWARF_CB_ABORT; /* No need to find other instances */
+}
+
/* Search function from function name */
static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
{
struct line_finder *lf = (struct line_finder *)data;
struct line_range *lr = lf->lr;
- int ret;
if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
die_compare_name(sp_die, lr->function) == 0) {
- /* Get the address range of this function */
- ret = dwarf_highpc(sp_die, &lf->addr_e);
- if (ret == 0)
- ret = dwarf_lowpc(sp_die, &lf->addr_s);
- if (ret != 0) {
- lf->addr_s = 0;
- lf->addr_e = 0;
- }
-
lf->fname = dwarf_decl_file(sp_die);
dwarf_decl_line(sp_die, &lr->offset);
pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
@@ -608,7 +636,11 @@ static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
lf->lno_e = lr->offset + lr->end;
lr->start = lf->lno_s;
lr->end = lf->lno_e;
- find_line_range_by_line(lf);
+ if (dwarf_func_inline(sp_die))
+ dwarf_func_inline_instances(sp_die,
+ line_range_inline_cb, lf);
+ else
+ find_line_range_by_line(sp_die, lf);
return 1;
}
return 0;
@@ -660,7 +692,7 @@ int find_line_range(int fd, struct line_range *lr)
lf.lno_e = INT_MAX;
else
lf.lno_e = lr->end;
- find_line_range_by_line(&lf);
+ find_line_range_by_line(NULL, &lf);
}
}
off = noff;
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 74525aeb30f..75a660d4bdb 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -82,8 +82,6 @@ struct line_finder {
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;
};
--
cgit v1.2.3-18-g5258
From 5c8d1cbbbed39dcab2ecf429d6e56ea548c0fda4 Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:36:04 -0500
Subject: perf probe: Show more lines after last line
Show 2 more lines after the last probe-able line.
This will clearly show the last closed-brace of
inline functions.
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: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
LKML-Reference: <20100225133604.6725.76820.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-event.c | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 71b0dd590a3..91f55f24fa9 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -716,6 +716,7 @@ void del_trace_kprobe_events(struct strlist *dellist)
}
#define LINEBUF_SIZE 256
+#define NR_ADDITIONAL_LINES 2
static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
{
@@ -776,5 +777,11 @@ void show_line_range(struct line_range *lr)
show_one_line(fp, (l++) - lr->offset, false, false);
show_one_line(fp, (l++) - lr->offset, false, true);
}
+
+ if (lr->end == INT_MAX)
+ lr->end = l + NR_ADDITIONAL_LINES;
+ while (l < lr->end && !feof(fp))
+ show_one_line(fp, (l++) - lr->offset, false, false);
+
fclose(fp);
}
--
cgit v1.2.3-18-g5258
From 2a9c8c36092de41c13fdd81fe59556915b080c3e Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 25 Feb 2010 08:36:12 -0500
Subject: perf probe: Add lazy line matching support
Add lazy line matching support for specifying new probes.
This also changes the syntax of perf probe a bit. Now
perf probe accepts one of below probe event definitions.
1) Define event based on function name
[EVENT=]FUNC[@SRC][:RLN|+OFF|%return|;PTN] [ARG ...]
2) Define event based on source file with line number
[EVENT=]SRC:ALN [ARG ...]
3) Define event based on source file with lazy pattern
[EVENT=]SRC;PTN [ARG ...]
- New lazy matching pattern(PTN) follows ';' (semicolon). And it
must be put the end of the definition.
- So, @SRC is no longer the part which must be put at the end
of the definition.
Note that ';' (semicolon) can be interpreted as the end of
a command by the shell. This means that you need to quote it.
(anyway you will need to quote the lazy pattern itself too,
because it may contains other sensitive characters, like
'[',']' etc.).
Lazy matching
-------------
The lazy line matching is similar to glob matching except
ignoring spaces in both of pattern and target.
e.g.
'a=*' can matches 'a=b', 'a = b', 'a == b' and so on.
This provides some sort of flexibility and robustness to
probe point definitions against minor code changes.
(for example, actual 10th line of schedule() can be changed
easily by modifying schedule(), but the same line matching
'rq=cpu_rq*' may still exist.)
Changes in v3:
- Cast Dwarf_Addr to uintmax_t for printf-formats.
Changes in v2:
- Cast Dwarf_Addr 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: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
LKML-Reference: <20100225133611.6725.45078.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-event.c | 48 +++++---
tools/perf/util/probe-finder.c | 249 +++++++++++++++++++++++++++++++----------
tools/perf/util/probe-finder.h | 2 +
tools/perf/util/string.c | 55 ++++++---
tools/perf/util/string.h | 1 +
5 files changed, 264 insertions(+), 91 deletions(-)
(limited to 'tools/perf/util')
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 91f55f24fa9..fa156f008e0 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -119,14 +119,14 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
char c, nc = 0;
/*
* <Syntax>
- * perf probe [EVENT=]SRC:LN
- * perf probe [EVENT=]FUNC[+OFFS|%return][@SRC]
+ * perf probe [EVENT=]SRC[:LN|;PTN]
+ * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
*
* TODO:Group name support
*/
- ptr = strchr(arg, '=');
- if (ptr) { /* Event name */
+ ptr = strpbrk(arg, ";=@+%");
+ if (ptr && *ptr == '=') { /* Event name */
*ptr = '\0';
tmp = ptr + 1;
ptr = strchr(arg, ':');
@@ -139,7 +139,7 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
arg = tmp;
}
- ptr = strpbrk(arg, ":+@%");
+ ptr = strpbrk(arg, ";:+@%");
if (ptr) {
nc = *ptr;
*p