linux-kernel - [tip:perf/urgent] perf beauty mmap: PROT_WRITE should come before PROT

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Date:   Thu, 3 Jan 2019 05:10:41 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, acme@...hat.com, hpa@...or.com,
        mingo@...nel.org, wangnan0@...wei.com, jolsa@...nel.org,
        tglx@...utronix.de, adrian.hunter@...el.com, namhyung@...nel.org,
        lclaudio@...hat.com
Subject: [tip:perf/urgent] perf beauty mmap: PROT_WRITE should come before
 PROT_EXEC

Commit-ID:  5ce29d522e9b8cdc158329a8539bcd6206fc5bf4
Gitweb:     https://git.kernel.org/tip/5ce29d522e9b8cdc158329a8539bcd6206fc5bf4
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 19 Dec 2018 10:10:51 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 21 Dec 2018 09:42:46 -0300

perf beauty mmap: PROT_WRITE should come before PROT_EXEC

To match strace output:

  # cat mmap.c
  #include <sys/mman.h>

  int main(void)
  {
	  mmap(0, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
	  return 0;
  }
  # strace -e mmap ./mmap |& grep -v ^+++
  mmap(NULL, 103484, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f5bae400000
  mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bae3fe000
  mmap(NULL, 3889792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f5bade40000
  mmap(0x7f5bae1ec000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ac000) = 0x7f5bae1ec000
  mmap(0x7f5bae1f2000, 14976, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f5bae1f2000
  mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bae419000
  # trace -e mmap ./mmap |& grep -v ^+++
  mmap(NULL, 103484, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6646c25000
  mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f6646c23000
  mmap(NULL, 3889792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6646665000
  mmap(0x7f6646a11000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ac000) = 0x7f6646a11000
  mmap(0x7f6646a17000, 14976, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS) = 0x7f6646a17000
  mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f6646c3e000
  #

Reported-by: Namhyung Kim <namhyung@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@...hat.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-nt49d6iqle80cw8f529ovaqi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/trace/beauty/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/trace/beauty/mmap.c b/tools/perf/trace/beauty/mmap.c
index eb31089790e3..859a8a9db2c6 100644
--- a/tools/perf/trace/beauty/mmap.c
+++ b/tools/perf/trace/beauty/mmap.c
@@ -18,8 +18,8 @@ static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
 	}
 
 	P_MMAP_PROT(READ);
-	P_MMAP_PROT(EXEC);
 	P_MMAP_PROT(WRITE);
+	P_MMAP_PROT(EXEC);
 	P_MMAP_PROT(SEM);
 	P_MMAP_PROT(GROWSDOWN);
 	P_MMAP_PROT(GROWSUP);