summaryrefslogtreecommitdiff
path: root/tools/perf/util/probe-finder.c
diff options
context:
space:
mode:
authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2015-05-08 04:03:35 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-08 22:31:02 +0300
commit4c859351226c920b227fec040a3b447f0d482af3 (patch)
treed490363d516b25e191e9c05205d0c660964b5bff /tools/perf/util/probe-finder.c
parent6cfd1f6805ca0b4a341794d67eb605089435f938 (diff)
downloadlinux-4c859351226c920b227fec040a3b447f0d482af3.tar.xz
perf probe: Support glob wildcards for function name
Support glob wildcards for function name when adding new probes. This will allow us to build caches of function-entry level information with $params. e.g. ---- # perf probe --no-inlines --add 'kmalloc* $params' Added new events: probe:kmalloc_slab (on kmalloc* with $params) probe:kmalloc_large_node (on kmalloc* with $params) probe:kmalloc_order_trace (on kmalloc* with $params) You can now use it in all perf tools, such as: perf record -e probe:kmalloc_order_trace -aR sleep 1 # perf probe --list probe:kmalloc_large_node (on kmalloc_large_node@mm/slub.c with size flags node) probe:kmalloc_order_trace (on kmalloc_order_trace@mm/slub.c with size flags order) probe:kmalloc_slab (on kmalloc_slab@mm/slab_common.c with size flags) ---- Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20150508010335.24812.19972.stgit@localhost.localdomain Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-finder.c')
-rw-r--r--tools/perf/util/probe-finder.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 1713421112f8..d5f60c055554 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -717,7 +717,7 @@ static int find_best_scope_cb(Dwarf_Die *fn_die, void *data)
}
/* If the function name is given, that's what user expects */
if (fsp->function) {
- if (die_compare_name(fn_die, fsp->function)) {
+ if (die_match_name(fn_die, fsp->function)) {
memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
fsp->found = true;
return 1;
@@ -920,13 +920,14 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
/* Check tag and diename */
if (!die_is_func_def(sp_die) ||
- !die_compare_name(sp_die, pp->function))
+ !die_match_name(sp_die, pp->function))
return DWARF_CB_OK;
/* Check declared file */
if (pp->file && strtailcmp(pp->file, dwarf_decl_file(sp_die)))
return DWARF_CB_OK;
+ pr_debug("Matched function: %s\n", dwarf_diename(sp_die));
pf->fname = dwarf_decl_file(sp_die);
if (pp->line) { /* Function relative line */
dwarf_decl_line(sp_die, &pf->lno);
@@ -943,10 +944,20 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
/* TODO: Check the address in this function */
param->retval = call_probe_finder(sp_die, pf);
}
- } else if (!probe_conf.no_inlines)
+ } else if (!probe_conf.no_inlines) {
/* Inlined function: search instances */
param->retval = die_walk_instances(sp_die,
probe_point_inline_cb, (void *)pf);
+ /* This could be a non-existed inline definition */
+ if (param->retval == -ENOENT && strisglob(pp->function))
+ param->retval = 0;
+ }
+
+ /* We need to find other candidates */
+ if (strisglob(pp->function) && param->retval >= 0) {
+ param->retval = 0; /* We have to clear the result */
+ return DWARF_CB_OK;
+ }
return DWARF_CB_ABORT; /* Exit; no same symbol in this CU. */
}
@@ -975,7 +986,7 @@ static int pubname_search_cb(Dwarf *dbg, Dwarf_Global *gl, void *data)
if (dwarf_tag(param->sp_die) != DW_TAG_subprogram)
return DWARF_CB_OK;
- if (die_compare_name(param->sp_die, param->function)) {
+ if (die_match_name(param->sp_die, param->function)) {
if (!dwarf_offdie(dbg, gl->cu_offset, param->cu_die))
return DWARF_CB_OK;
@@ -1028,7 +1039,7 @@ static int debuginfo__find_probes(struct debuginfo *dbg,
return -ENOMEM;
/* Fastpath: lookup by function name from .debug_pubnames section */
- if (pp->function) {
+ if (pp->function && !strisglob(pp->function)) {
struct pubname_callback_param pubname_param = {
.function = pp->function,
.file = pp->file,
@@ -1177,6 +1188,10 @@ static int add_probe_trace_event(Dwarf_Die *sc_die, struct probe_finder *pf)
if (ret < 0)
return ret;
+ tev->point.realname = strdup(dwarf_diename(sc_die));
+ if (!tev->point.realname)
+ return -ENOMEM;
+
pr_debug("Probe point found: %s+%lu\n", tev->point.symbol,
tev->point.offset);
@@ -1535,7 +1550,7 @@ static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
return DWARF_CB_OK;
if (die_is_func_def(sp_die) &&
- die_compare_name(sp_die, lr->function)) {
+ die_match_name(sp_die, lr->function)) {
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);