perf probe: Fix the logic of die_compare_name

Invert the return value of die_compare_name(), because it returns a 'bool'
result which should be expeced true if the die's name is same as compared
string.

LKML-Reference: <4C36EBED.1000006@hitachi.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 37dcdb651a69bbd5b7c1e76491a8f1f1fc487440..f88070ea5b909e39a88f15f831bcd114b1da138b 100644 (file)
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -158,7 +158,7 @@ static bool die_compare_name(Dwarf_Die *dw_die, const char *tname)
 {
        const char *name;
        name = dwarf_diename(dw_die);
-       return name ? strcmp(tname, name) : -1;
+       return name ? (strcmp(tname, name) == 0) : false;
 }
 
 /* Get type die, but skip qualifiers and typedef */
@@ -329,7 +329,7 @@ static int __die_find_variable_cb(Dwarf_Die *die_mem, void *data)
        tag = dwarf_tag(die_mem);
        if ((tag == DW_TAG_formal_parameter ||
             tag == DW_TAG_variable) &&
-           (die_compare_name(die_mem, name) == 0))
+           die_compare_name(die_mem, name))
                return DIE_FIND_CB_FOUND;
 
        return DIE_FIND_CB_CONTINUE;
@@ -348,7 +348,7 @@ static int __die_find_member_cb(Dwarf_Die *die_mem, void *data)
        const char *name = data;
 
        if ((dwarf_tag(die_mem) == DW_TAG_member) &&
-           (die_compare_name(die_mem, name) == 0))
+           die_compare_name(die_mem, name))
                return DIE_FIND_CB_FOUND;
 
        return DIE_FIND_CB_SIBLING;
@@ -506,8 +506,8 @@ static int convert_variable_type(Dwarf_Die *vr_die,
                                return -ENOMEM;
                        }
                }
-               if (die_compare_name(&type, "char") != 0 &&
-                   die_compare_name(&type, "unsigned char") != 0) {
+               if (!die_compare_name(&type, "char") &&
+                   !die_compare_name(&type, "unsigned char")) {
                        pr_warning("Failed to cast into string: "
                                   "%s is not (unsigned) char *.",
                                   dwarf_diename(vr_die));
@@ -1017,7 +1017,7 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
 
        /* Check tag and diename */
        if (dwarf_tag(sp_die) != DW_TAG_subprogram ||
-           die_compare_name(sp_die, pp->function) != 0)
+           !die_compare_name(sp_die, pp->function))
                return DWARF_CB_OK;
 
        pf->fname = dwarf_decl_file(sp_die);
@@ -1340,7 +1340,7 @@ static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
        struct line_range *lr = lf->lr;
 
        if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
-           die_compare_name(sp_die, lr->function) == 0) {
+           die_compare_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);