Hi, All.
Rishikesh K. Rajak wrote:
On Wed, 2008-11-12 at 13:34 +0300, Andrew Vagin wrote:
Hi, All.
Rishi, can you attach log from strace -f
./testcases/kernel/mem/mtest07/mallocstress ?
Andrew, Sorry i could not expect this mail to go somewhere else.
Attached is the strace output.
Thanks.
I found error for help valgrind.
==13393== Thread 56:
==13393== Invalid write of size 8
==13393== at 0x400C27: allocate_free (mallocstress.c:198)
==13393== by 0x400E4D: alloc_mem (mallocstress.c:281)
==13393== by 0x3B5F007299: start_thread (in /lib64/libpthread-2.8.so)
==13393== by 0x3B5E4E439C: clone (in /lib64/libc-2.8.so)
==13393== Address 0x4c36a60 is 0 bytes inside a block of size 1 alloc'd
==13393== at 0x4A0739E: malloc (vg_replace_malloc.c:207)
==13393== by 0x400BF0: allocate_free (mallocstress.c:192)
==13393== by 0x400E4D: alloc_mem (mallocstress.c:281)
==13393== by 0x3B5F007299: start_thread (in /lib64/libpthread-2.8.so)
==13393== by 0x3B5E4E439C: clone (in /lib64/libc-2.8.so)
(gdb) print i
$1 = 0
(gdb) print alloc_num
No symbol "alloc_num" in current context.
(gdb) print num_alloc
$2 = 0
(gdb) print size
$3 = 1
strick the eye, we have pointer with type long, but allocate one byte only.
size_t size = 1;
long *ptrs[MAXPTRS];
......
ptrs[num_alloc] = (long *)malloc(size);
I use valgrind first time. Thanks for this possibility:).
see the attached patch
test passed and valgrind don't report errors after my patch
Thread [34]: allocate_free() returned 0, succeeded. Thread exiting.
main(): test passed.
==13299==
==13299== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 1)
==13299== malloc/free: in use at exit: 0 bytes in 0 blocks.
==13299== malloc/free: 233,080 allocs, 227,080 frees, 5,454,975,665,283
bytes allocated.
ps: I use oldsize = 5, because long will be equal 8 in more case.
oldsize is previous value of fibannoci series
- Rishi
diff --git a/testcases/kernel/containers/netns/container_ftp.pl
b/testcases/kernel/containers/netns/container_ftp.pl
old mode 100644
new mode 100755
diff --git a/testcases/kernel/mem/mtest07/Makefile
b/testcases/kernel/mem/mtest07/Makefile
index 544c196..c4ab953 100644
--- a/testcases/kernel/mem/mtest07/Makefile
+++ b/testcases/kernel/mem/mtest07/Makefile
@@ -1,4 +1,4 @@
-CFLAGS += -Wall -O -g
+CFLAGS += -Wall -g
LDLIBS := -lpthread -lm
SRCS=$(wildcard *.c)
diff --git a/testcases/kernel/mem/mtest07/mallocstress.c
b/testcases/kernel/mem/mtest07/mallocstress.c
index 9c96703..7b7e36a 100644
--- a/testcases/kernel/mem/mtest07/mallocstress.c
+++ b/testcases/kernel/mem/mtest07/mallocstress.c
@@ -168,8 +168,8 @@ allocate_free(int repeat, /* number of times to
repeat allocate/free */
for (loop = 0; loop < repeat; loop++)
{
- size_t oldsize = 1; /* remember size for fibannoci
series */
- size_t size = 1; /* size of next block in ptrs[]
*/
+ size_t oldsize = 5; /* remember size for fibannoci
series */
+ size_t size = sizeof(long); /* size of next block in ptrs[]
*/
long *ptrs[MAXPTRS]; /* the pointers allocated in this loop
*/
int num_alloc; /* number of elements in ptrs[] so far */
int i;
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