linux/arch/x86/include/asm/kmemcheck.h
Vegard Nossum dfec072ecd 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>
2009-06-13 15:37:30 +02:00

43 lines
847 B
C

#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