From 646a6e846c4dc3812c614fd061603b6db5b8d380 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Sat, 21 Nov 2015 11:23:55 +0100 Subject: [PATCH] perf callchain: Add missing parent_val initialization Adding missing parent_val callchain_node initialization. It's causing segfault in perf top: $ sudo perf top -g perf: Segmentation fault -------- backtrace -------- free_callchain_node(+0x29) in perf [0x4a4b3e] free_callchain(+0x29) in perf [0x4a5a83] hist_entry__delete(+0x126) in perf [0x4c6649] hists__delete_entry(+0x6e) in perf [0x4c66dc] hists__decay_entries(+0x7d) in perf [0x4c6776] perf_top__sort_new_samples(+0x7c) in perf [0x436a78] hist_browser__run(+0xf2) in perf [0x507760] perf_evsel__hists_browse(+0x1da) in perf [0x507c8d] perf_evlist__tui_browse_hists(+0x3e) in perf [0x5088cf] display_thread_tui(+0x7f) in perf [0x437953] start_thread(+0xc5) in libpthread-2.21.so [0x7f7068fbb555] __clone(+0x6d) in libc-2.21.so [0x7f7066fc3b9d] [0x0] Reported-and-Tested-by: Arnaldo Carvalho de Melo Signed-off-by: Jiri Olsa Acked-by: Namhyung Kim Cc: Masami Hiramatsu Cc: Wang Nan Fixes: 4b3a3212233a ("perf hists browser: Support flat callchains") Link: http://lkml.kernel.org/r/20151121102355.GA17313@krava.local Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/callchain.h | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index 6e9b5f2..8ac8f043 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -143,6 +143,7 @@ extern __thread struct callchain_cursor callchain_cursor; static inline void callchain_init(struct callchain_root *root) { INIT_LIST_HEAD(&root->node.val); + INIT_LIST_HEAD(&root->node.parent_val); root->node.parent = NULL; root->node.hit = 0; -- 2.7.4