From: Namhyung Kim Date: Fri, 9 Nov 2012 17:27:15 +0000 (+0900) Subject: perf annotate: Don't try to follow jump target on PLT symbols X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=32ae1efd9d40645601cd4e09fa83a2711dd1ad6d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git perf annotate: Don't try to follow jump target on PLT symbols The perf annotate browser on TUI can identify a jump target for a selected instruction. It assumes that the jump target is within the function but it's not the case of PLT symbols which have offset out of the function as a target. Since it caused a segmentation fault, do not try to follow jump target on the PLT symbols. Signed-off-by: Namhyung Kim Cc: Andi Kleen Cc: David Ahern Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1352482044-3443-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c index 3eff17f703f3..5dab3ca96980 100644 --- a/tools/perf/ui/browsers/annotate.c +++ b/tools/perf/ui/browsers/annotate.c @@ -188,6 +188,12 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser) struct disasm_line *cursor = ab->selection, *target; struct browser_disasm_line *btarget, *bcursor; unsigned int from, to; + struct map_symbol *ms = ab->b.priv; + struct symbol *sym = ms->sym; + + /* PLT symbols contain external offsets */ + if (strstr(sym->name, "@plt")) + return; if (!cursor || !cursor->ins || !ins__is_jump(cursor->ins) || !disasm_line__has_offset(cursor)) @@ -771,6 +777,12 @@ static void annotate_browser__mark_jump_targets(struct annotate_browser *browser size_t size) { u64 offset; + struct map_symbol *ms = browser->b.priv; + struct symbol *sym = ms->sym; + + /* PLT symbols contain external offsets */ + if (strstr(sym->name, "@plt")) + return; for (offset = 0; offset < size; ++offset) { struct disasm_line *dl = browser->offsets[offset], *dlt;