diff options
author | Masami Hiramatsu <mhiramat@kernel.org> | 2016-05-10 14:47:07 +0900 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-10 11:53:34 -0300 |
commit | bf4d5f25c90bf2eca8671f2fc4e3d15919cd7f9c (patch) | |
tree | 56de428c1d9a1085ed7dfc3c4256cc511f743100 /tools/perf/util/dwarf-aux.c | |
parent | 5cea57f30a12443c05e0c5273f35d2fcef00d30a (diff) | |
download | linux-bf4d5f25c90bf2eca8671f2fc4e3d15919cd7f9c.tar.bz2 |
perf probe: Check the return value of strbuf APIs
Check the return value of strbuf APIs in perf-probe
related code, so that it can handle errors in strbuf.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20160510054707.6158.69861.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/dwarf-aux.c')
-rw-r--r-- | tools/perf/util/dwarf-aux.c | 52 |
1 files changed, 24 insertions, 28 deletions
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c index aea189b41cc8..a347b19c961a 100644 --- a/tools/perf/util/dwarf-aux.c +++ b/tools/perf/util/dwarf-aux.c @@ -915,8 +915,7 @@ int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf) tmp = "*"; else if (tag == DW_TAG_subroutine_type) { /* Function pointer */ - strbuf_add(buf, "(function_type)", 15); - return 0; + return strbuf_add(buf, "(function_type)", 15); } else { if (!dwarf_diename(&type)) return -ENOENT; @@ -927,14 +926,10 @@ int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf) else if (tag == DW_TAG_enumeration_type) tmp = "enum "; /* Write a base name */ - strbuf_addf(buf, "%s%s", tmp, dwarf_diename(&type)); - return 0; + return strbuf_addf(buf, "%s%s", tmp, dwarf_diename(&type)); } ret = die_get_typename(&type, buf); - if (ret == 0) - strbuf_addstr(buf, tmp); - - return ret; + return ret ? ret : strbuf_addstr(buf, tmp); } /** @@ -951,12 +946,10 @@ int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf) ret = die_get_typename(vr_die, buf); if (ret < 0) { pr_debug("Failed to get type, make it unknown.\n"); - strbuf_add(buf, " (unknown_type)", 14); + ret = strbuf_add(buf, " (unknown_type)", 14); } - strbuf_addf(buf, "\t%s", dwarf_diename(vr_die)); - - return 0; + return ret < 0 ? ret : strbuf_addf(buf, "\t%s", dwarf_diename(vr_die)); } #ifdef HAVE_DWARF_GETLOCATIONS @@ -999,22 +992,24 @@ static int die_get_var_innermost_scope(Dwarf_Die *sp_die, Dwarf_Die *vr_die, } while ((offset = dwarf_ranges(&scopes[1], offset, &base, - &start, &end)) > 0) { + &start, &end)) > 0) { start -= entry; end -= entry; if (first) { - strbuf_addf(buf, "@<%s+[%" PRIu64 "-%" PRIu64, - name, start, end); + ret = strbuf_addf(buf, "@<%s+[%" PRIu64 "-%" PRIu64, + name, start, end); first = false; } else { - strbuf_addf(buf, ",%" PRIu64 "-%" PRIu64, - start, end); + ret = strbuf_addf(buf, ",%" PRIu64 "-%" PRIu64, + start, end); } + if (ret < 0) + goto out; } if (!first) - strbuf_add(buf, "]>", 2); + ret = strbuf_add(buf, "]>", 2); out: free(scopes); @@ -1054,31 +1049,32 @@ int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf) if (dwarf_attr(vr_die, DW_AT_location, &attr) == NULL) return -EINVAL; - while ((offset = dwarf_getlocations( - &attr, offset, &base, - &start, &end, &op, &nops)) > 0) { + while ((offset = dwarf_getlocations(&attr, offset, &base, + &start, &end, &op, &nops)) > 0) { if (start == 0) { /* Single Location Descriptions */ ret = die_get_var_innermost_scope(sp_die, vr_die, buf); - return ret; + goto out; } /* Location Lists */ start -= entry; end -= entry; if (first) { - strbuf_addf(buf, "@<%s+[%" PRIu64 "-%" PRIu64, - name, start, end); + ret = strbuf_addf(buf, "@<%s+[%" PRIu64 "-%" PRIu64, + name, start, end); first = false; } else { - strbuf_addf(buf, ",%" PRIu64 "-%" PRIu64, - start, end); + ret = strbuf_addf(buf, ",%" PRIu64 "-%" PRIu64, + start, end); } + if (ret < 0) + goto out; } if (!first) - strbuf_add(buf, "]>", 2); - + ret = strbuf_add(buf, "]>", 2); +out: return ret; } #else |