summaryrefslogtreecommitdiff
path: root/include/linux/kmemcheck.h
diff options
context:
space:
mode:
authorVegard Nossum <vegard.nossum@gmail.com>2008-04-04 00:51:41 +0200
committerVegard Nossum <vegard.nossum@gmail.com>2009-06-13 15:37:30 +0200
commitdfec072ecd35ba6ecad2d51dde325253ac9a2936 (patch)
treeccf682a631ef8edc0675d68d004bc3a80b34b648 /include/linux/kmemcheck.h
parente594c8de3bd4e7732ed3340fb01e18ec94b12df2 (diff)
kmemcheck: add the kmemcheck core
General description: kmemcheck is a patch to the linux kernel that detects use of uninitialized memory. It does this by trapping every read and write to memory that was allocated dynamically (e.g. using kmalloc()). If a memory address is read that has not previously been written to, a message is printed to the kernel log. Thanks to Andi Kleen for the set_memory_4k() solution. Andrew Morton suggested documenting the shadow member of struct page. Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> [export kmemcheck_mark_initialized] [build fix for setup_max_cpus] Signed-off-by: Ingo Molnar <mingo@elte.hu> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>
Diffstat (limited to 'include/linux/kmemcheck.h')
-rw-r--r--include/linux/kmemcheck.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/kmemcheck.h b/include/linux/kmemcheck.h
new file mode 100644
index 000000000000..39480c91b2f9
--- /dev/null
+++ b/include/linux/kmemcheck.h
@@ -0,0 +1,17 @@
+#ifndef LINUX_KMEMCHECK_H
+#define LINUX_KMEMCHECK_H
+
+#include <linux/mm_types.h>
+#include <linux/types.h>
+
+#ifdef CONFIG_KMEMCHECK
+extern int kmemcheck_enabled;
+
+int kmemcheck_show_addr(unsigned long address);
+int kmemcheck_hide_addr(unsigned long address);
+#else
+#define kmemcheck_enabled 0
+
+#endif /* CONFIG_KMEMCHECK */
+
+#endif /* LINUX_KMEMCHECK_H */