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kmemleak: Add the vmalloc memory allocation/freeing hooks 

This patch adds the callbacks to kmemleak_(alloc|free) functions from
vmalloc/vfree.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2009-06-11 13:23:19 +01:00
parent 06f22f13f3
commit 89219d37a2
1 changed files with 27 additions and 3 deletions
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30
mm/vmalloc.c
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@ -25,6 +25,7 @@
#include <linux/rcupdate.h> #include <linux/rcupdate.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/pfn.h> #include <linux/pfn.h>
#include <linux/kmemleak.h>
#include <asm/atomic.h> #include <asm/atomic.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
@ -1327,6 +1328,9 @@ static void __vunmap(const void *addr, int deallocate_pages)
void vfree(const void *addr) void vfree(const void *addr)
{ {
BUG_ON(in_interrupt()); BUG_ON(in_interrupt());
kmemleak_free(addr);
__vunmap(addr, 1); __vunmap(addr, 1);
} }
EXPORT_SYMBOL(vfree); EXPORT_SYMBOL(vfree);
@ -1439,8 +1443,17 @@ fail:
void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot) void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot)
{ {
return __vmalloc_area_node(area, gfp_mask, prot, -1, void *addr = __vmalloc_area_node(area, gfp_mask, prot, -1,
__builtin_return_address(0)); __builtin_return_address(0));
/*
* A ref_count = 3 is needed because the vm_struct and vmap_area
* structures allocated in the __get_vm_area_node() function contain
* references to the virtual address of the vmalloc'ed block.
*/
kmemleak_alloc(addr, area->size - PAGE_SIZE, 3, gfp_mask);
return addr;
} }
/** /**
@ -1459,6 +1472,8 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
int node, void *caller) int node, void *caller)
{ {
struct vm_struct *area; struct vm_struct *area;
void *addr;
unsigned long real_size = size;
size = PAGE_ALIGN(size); size = PAGE_ALIGN(size);
if (!size || (size >> PAGE_SHIFT) > num_physpages) if (!size || (size >> PAGE_SHIFT) > num_physpages)
@ -1470,7 +1485,16 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
if (!area) if (!area)
return NULL; return NULL;
return __vmalloc_area_node(area, gfp_mask, prot, node, caller); addr = __vmalloc_area_node(area, gfp_mask, prot, node, caller);
/*
* A ref_count = 3 is needed because the vm_struct and vmap_area
* structures allocated in the __get_vm_area_node() function contain
* references to the virtual address of the vmalloc'ed block.
*/
kmemleak_alloc(addr, real_size, 3, gfp_mask);
return addr;
} }
void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot) void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)