From: Anton Blanchard <anton@samba.org>
Date: Thu, 16 Jul 2009 13:44:29 +0000 (+0200)
Subject: perf_counter: Synthesize VDSO mmap event
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=11b5f81e1b0ea0bc84fe32f0a27054e052b2bf84;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

perf_counter: Synthesize VDSO mmap event

perf record synthesizes mmap events for the running process.
Right now it just catches file mappings, but we can check for
the vdso symbol and add that too.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090716104817.517264409@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4ef78a5e6f32..072aaf0369f8 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -313,6 +313,10 @@ static void pid_synthesize_mmap_samples(pid_t pid)
 		if (*pbf == 'x') { /* vm_exec */
 			char *execname = strchr(bf, '/');
 
+			/* Catch VDSO */
+			if (execname == NULL)
+				execname = strstr(bf, "[vdso]");
+
 			if (execname == NULL)
 				continue;