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Message-Id: <20181109113036.21512-1-rafael.tinoco@linaro.org>
Date: Fri, 9 Nov 2018 09:30:36 -0200
From: Rafael David Tinoco <rafael.tinoco@...aro.org>
To: gorcunov@...il.com
Cc: adobriyan@...il.com, akpm@...ux-foundation.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, rafael.tinoco@...aro.org,
shuah@...nel.org
Subject: [PATCH] proc: fix and merge proc-self-map-file tests
Merge proc-self-map-files tests into one since this test should focus in
testing readlink in /proc/self/map_files/* only, and not trying to test
mapping virtual address 0.
Lowest virtual address for user space mapping in other architectures,
like arm, is *at least* *(PAGE_SIZE * 2) and NULL hint does not
guarantee that when MAP_FIXED flag, important to this test, is given.
This patch also fixes this issue in remaining test.
Link: https://bugs.linaro.org/show_bug.cgi?id=3782
Signed-off-by: Rafael David Tinoco <rafael.tinoco@...aro.org>
---
tools/testing/selftests/proc/.gitignore | 1 -
tools/testing/selftests/proc/Makefile | 1 -
.../selftests/proc/proc-self-map-files-001.c | 5 +-
.../selftests/proc/proc-self-map-files-002.c | 85 -------------------
4 files changed, 3 insertions(+), 89 deletions(-)
delete mode 100644 tools/testing/selftests/proc/proc-self-map-files-002.c
diff --git a/tools/testing/selftests/proc/.gitignore b/tools/testing/selftests/proc/.gitignore
index 82121a81681f..d44ec8755879 100644
--- a/tools/testing/selftests/proc/.gitignore
+++ b/tools/testing/selftests/proc/.gitignore
@@ -3,7 +3,6 @@
/fd-003-kthread
/proc-loadavg-001
/proc-self-map-files-001
-/proc-self-map-files-002
/proc-self-syscall
/proc-self-wchan
/proc-uptime-001
diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
index 1c12c34cf85d..6c17557c2f9a 100644
--- a/tools/testing/selftests/proc/Makefile
+++ b/tools/testing/selftests/proc/Makefile
@@ -7,7 +7,6 @@ TEST_GEN_PROGS += fd-002-posix-eq
TEST_GEN_PROGS += fd-003-kthread
TEST_GEN_PROGS += proc-loadavg-001
TEST_GEN_PROGS += proc-self-map-files-001
-TEST_GEN_PROGS += proc-self-map-files-002
TEST_GEN_PROGS += proc-self-syscall
TEST_GEN_PROGS += proc-self-wchan
TEST_GEN_PROGS += proc-uptime-001
diff --git a/tools/testing/selftests/proc/proc-self-map-files-001.c b/tools/testing/selftests/proc/proc-self-map-files-001.c
index 4209c64283d6..646d8d3fba3a 100644
--- a/tools/testing/selftests/proc/proc-self-map-files-001.c
+++ b/tools/testing/selftests/proc/proc-self-map-files-001.c
@@ -46,16 +46,17 @@ static void fail(const char *fmt, unsigned long a, unsigned long b)
int main(void)
{
- const unsigned int PAGE_SIZE = sysconf(_SC_PAGESIZE);
void *p;
int fd;
unsigned long a, b;
+ const long PAGE_SIZE = sysconf(_SC_PAGESIZE);
fd = open("/dev/zero", O_RDONLY);
if (fd == -1)
return 1;
- p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE, fd, 0);
+ p = mmap((void *) (2 * PAGE_SIZE), PAGE_SIZE, PROT_NONE,
+ MAP_PRIVATE|MAP_FILE, fd, 0);
if (p == MAP_FAILED)
return 1;
diff --git a/tools/testing/selftests/proc/proc-self-map-files-002.c b/tools/testing/selftests/proc/proc-self-map-files-002.c
deleted file mode 100644
index 6f1f4a6e1ecb..000000000000
--- a/tools/testing/selftests/proc/proc-self-map-files-002.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * Copyright © 2018 Alexey Dobriyan <adobriyan@...il.com>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-/* Test readlink /proc/self/map_files/... with address 0. */
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <stdlib.h>
-
-static void pass(const char *fmt, unsigned long a, unsigned long b)
-{
- char name[64];
- char buf[64];
-
- snprintf(name, sizeof(name), fmt, a, b);
- if (readlink(name, buf, sizeof(buf)) == -1)
- exit(1);
-}
-
-static void fail(const char *fmt, unsigned long a, unsigned long b)
-{
- char name[64];
- char buf[64];
-
- snprintf(name, sizeof(name), fmt, a, b);
- if (readlink(name, buf, sizeof(buf)) == -1 && errno == ENOENT)
- return;
- exit(1);
-}
-
-int main(void)
-{
- const unsigned int PAGE_SIZE = sysconf(_SC_PAGESIZE);
- void *p;
- int fd;
- unsigned long a, b;
-
- fd = open("/dev/zero", O_RDONLY);
- if (fd == -1)
- return 1;
-
- p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE|MAP_FIXED, fd, 0);
- if (p == MAP_FAILED) {
- if (errno == EPERM)
- return 2;
- return 1;
- }
-
- a = (unsigned long)p;
- b = (unsigned long)p + PAGE_SIZE;
-
- pass("/proc/self/map_files/%lx-%lx", a, b);
- fail("/proc/self/map_files/ %lx-%lx", a, b);
- fail("/proc/self/map_files/%lx -%lx", a, b);
- fail("/proc/self/map_files/%lx- %lx", a, b);
- fail("/proc/self/map_files/%lx-%lx ", a, b);
- fail("/proc/self/map_files/0%lx-%lx", a, b);
- fail("/proc/self/map_files/%lx-0%lx", a, b);
- if (sizeof(long) == 4) {
- fail("/proc/self/map_files/100000000%lx-%lx", a, b);
- fail("/proc/self/map_files/%lx-100000000%lx", a, b);
- } else if (sizeof(long) == 8) {
- fail("/proc/self/map_files/10000000000000000%lx-%lx", a, b);
- fail("/proc/self/map_files/%lx-10000000000000000%lx", a, b);
- } else
- return 1;
-
- return 0;
-}
--
2.19.1
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