lkml.org 
[lkml]   [2019]   [Oct]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[BUGFIX PATCH 1/5] selftests: proc: Make va_max 3GB on 32bit arch
Date
Currently proc-self-map-files-002.c sets va_max (max test address
of user virtual address) to 4GB, but it is too big for 32bit
arch and 1UL << 32 is overflow on 32bit long.

Make va_max 3GB on 32bit arch like i386 and arm.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
---
.../selftests/proc/proc-self-map-files-002.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/proc/proc-self-map-files-002.c b/tools/testing/selftests/proc/proc-self-map-files-002.c
index 47b7473dedef..d517f8c479fb 100644
--- a/tools/testing/selftests/proc/proc-self-map-files-002.c
+++ b/tools/testing/selftests/proc/proc-self-map-files-002.c
@@ -22,6 +22,7 @@
#include <unistd.h>
#include <sys/mman.h>
#include <stdlib.h>
+#include <asm/bitsperlong.h>

static void pass(const char *fmt, unsigned long a, unsigned long b)
{
@@ -44,10 +45,18 @@ static void fail(const char *fmt, unsigned long a, unsigned long b)
exit(1);
}

+#if __BITS_PER_LONG == 32
+# define VA_MAX (3UL << 30)
+#elif __BITS_PER_LONG == 64
+# define VA_MAX (1UL << 32)
+#else
+# define VA_MAX 0
+#endif
+
int main(void)
{
const int PAGE_SIZE = sysconf(_SC_PAGESIZE);
- const unsigned long va_max = 1UL << 32;
+ const unsigned long va_max = VA_MAX;
unsigned long va;
void *p;
int fd;
\
 
 \ /
  Last update: 2019-10-07 17:21    [W:0.063 / U:0.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site