diff options
author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-04-04 00:51:41 +0200 |
---|---|---|
committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-13 15:37:30 +0200 |
commit | dfec072ecd35ba6ecad2d51dde325253ac9a2936 (patch) | |
tree | ccf682a631ef8edc0675d68d004bc3a80b34b648 /arch/x86/include/asm/kmemcheck.h | |
parent | kmemcheck: add the kmemcheck documentation (diff) | |
download | linux-dfec072ecd35ba6ecad2d51dde325253ac9a2936.tar.xz linux-dfec072ecd35ba6ecad2d51dde325253ac9a2936.zip |
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 'arch/x86/include/asm/kmemcheck.h')
-rw-r--r-- | arch/x86/include/asm/kmemcheck.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kmemcheck.h b/arch/x86/include/asm/kmemcheck.h new file mode 100644 index 000000000000..ed01518f297e --- /dev/null +++ b/arch/x86/include/asm/kmemcheck.h @@ -0,0 +1,42 @@ +#ifndef ASM_X86_KMEMCHECK_H +#define ASM_X86_KMEMCHECK_H + +#include <linux/types.h> +#include <asm/ptrace.h> + +#ifdef CONFIG_KMEMCHECK +bool kmemcheck_active(struct pt_regs *regs); + +void kmemcheck_show(struct pt_regs *regs); +void kmemcheck_hide(struct pt_regs *regs); + +bool kmemcheck_fault(struct pt_regs *regs, + unsigned long address, unsigned long error_code); +bool kmemcheck_trap(struct pt_regs *regs); +#else +static inline bool kmemcheck_active(struct pt_regs *regs) +{ + return false; +} + +static inline void kmemcheck_show(struct pt_regs *regs) +{ +} + +static inline void kmemcheck_hide(struct pt_regs *regs) +{ +} + +static inline bool kmemcheck_fault(struct pt_regs *regs, + unsigned long address, unsigned long error_code) +{ + return false; +} + +static inline bool kmemcheck_trap(struct pt_regs *regs) +{ + return false; +} +#endif /* CONFIG_KMEMCHECK */ + +#endif |