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Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6

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* 'kmemleak' of git://linux-arm.org/linux-2.6:
  kmemleak: Do not force the slab debugging Kconfig options
  kmemleak: use pr_fmt
This commit is contained in:
Linus Torvalds 2009-06-23 11:25:04 -07:00
commit 95b3692d9c
2 changed files with 27 additions and 30 deletions
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5
lib/Kconfig.debug
View File

@ -340,8 +340,6 @@ config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
depends on DEBUG_KERNEL && EXPERIMENTAL && (X86 || ARM) && \
!MEMORY_HOTPLUG
select DEBUG_SLAB if SLAB
select SLUB_DEBUG if SLUB
select DEBUG_FS if SYSFS
select STACKTRACE if STACKTRACE_SUPPORT
select KALLSYMS
@ -355,6 +353,9 @@ config DEBUG_KMEMLEAK
allocations. See Documentation/kmemleak.txt for more
details.
Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances
of finding leaks due to the slab objects poisoning.
In order to access the kmemleak file, debugfs needs to be
mounted (usually at /sys/kernel/debug).

52
mm/kmemleak.c
View File

@ -61,6 +61,8 @@
* structure.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
@ -311,7 +313,7 @@ static int unreferenced_object(struct kmemleak_object *object)
static void print_referenced(struct kmemleak_object *object)
{
pr_info("kmemleak: referenced object 0x%08lx (size %zu)\n",
pr_info("referenced object 0x%08lx (size %zu)\n",
object->pointer, object->size);
}
@ -320,7 +322,7 @@ static void print_unreferenced(struct seq_file *seq,
{
int i;
print_helper(seq, "kmemleak: unreferenced object 0x%08lx (size %zu):\n",
print_helper(seq, "unreferenced object 0x%08lx (size %zu):\n",
object->pointer, object->size);
print_helper(seq, " comm \"%s\", pid %d, jiffies %lu\n",
object->comm, object->pid, object->jiffies);
@ -344,7 +346,7 @@ static void dump_object_info(struct kmemleak_object *object)
trace.nr_entries = object->trace_len;
trace.entries = object->trace;
pr_notice("kmemleak: Object 0x%08lx (size %zu):\n",
pr_notice("Object 0x%08lx (size %zu):\n",
object->tree_node.start, object->size);
pr_notice(" comm \"%s\", pid %d, jiffies %lu\n",
object->comm, object->pid, object->jiffies);
@ -372,7 +374,7 @@ static struct kmemleak_object *lookup_object(unsigned long ptr, int alias)
object = prio_tree_entry(node, struct kmemleak_object,
tree_node);
if (!alias && object->pointer != ptr) {
kmemleak_warn("kmemleak: Found object by alias");
kmemleak_warn("Found object by alias");
object = NULL;
}
} else
@ -467,8 +469,7 @@ static void create_object(unsigned long ptr, size_t size, int min_count,
object = kmem_cache_alloc(object_cache, gfp & GFP_KMEMLEAK_MASK);
if (!object) {
kmemleak_stop("kmemleak: Cannot allocate a kmemleak_object "
"structure\n");
kmemleak_stop("Cannot allocate a kmemleak_object structure\n");
return;
}
@ -527,8 +528,8 @@ static void create_object(unsigned long ptr, size_t size, int min_count,
if (node != &object->tree_node) {
unsigned long flags;
kmemleak_stop("kmemleak: Cannot insert 0x%lx into the object "
"search tree (already existing)\n", ptr);
kmemleak_stop("Cannot insert 0x%lx into the object search tree "
"(already existing)\n", ptr);
object = lookup_object(ptr, 1);
spin_lock_irqsave(&object->lock, flags);
dump_object_info(object);
@ -553,7 +554,7 @@ static void delete_object(unsigned long ptr)
write_lock_irqsave(&kmemleak_lock, flags);
object = lookup_object(ptr, 0);
if (!object) {
kmemleak_warn("kmemleak: Freeing unknown object at 0x%08lx\n",
kmemleak_warn("Freeing unknown object at 0x%08lx\n",
ptr);
write_unlock_irqrestore(&kmemleak_lock, flags);
return;
@ -588,8 +589,7 @@ static void make_gray_object(unsigned long ptr)
object = find_and_get_object(ptr, 0);
if (!object) {
kmemleak_warn("kmemleak: Graying unknown object at 0x%08lx\n",
ptr);
kmemleak_warn("Graying unknown object at 0x%08lx\n", ptr);
return;
}
@ -610,8 +610,7 @@ static void make_black_object(unsigned long ptr)
object = find_and_get_object(ptr, 0);
if (!object) {
kmemleak_warn("kmemleak: Blacking unknown object at 0x%08lx\n",
ptr);
kmemleak_warn("Blacking unknown object at 0x%08lx\n", ptr);
return;
}
@ -634,21 +633,20 @@ static void add_scan_area(unsigned long ptr, unsigned long offset,
object = find_and_get_object(ptr, 0);
if (!object) {
kmemleak_warn("kmemleak: Adding scan area to unknown "
"object at 0x%08lx\n", ptr);
kmemleak_warn("Adding scan area to unknown object at 0x%08lx\n",
ptr);
return;
}
area = kmem_cache_alloc(scan_area_cache, gfp & GFP_KMEMLEAK_MASK);
if (!area) {
kmemleak_warn("kmemleak: Cannot allocate a scan area\n");
kmemleak_warn("Cannot allocate a scan area\n");
goto out;
}
spin_lock_irqsave(&object->lock, flags);
if (offset + length > object->size) {
kmemleak_warn("kmemleak: Scan area larger than object "
"0x%08lx\n", ptr);
kmemleak_warn("Scan area larger than object 0x%08lx\n", ptr);
dump_object_info(object);
kmem_cache_free(scan_area_cache, area);
goto out_unlock;
@ -677,8 +675,7 @@ static void object_no_scan(unsigned long ptr)
object = find_and_get_object(ptr, 0);
if (!object) {
kmemleak_warn("kmemleak: Not scanning unknown object at "
"0x%08lx\n", ptr);
kmemleak_warn("Not scanning unknown object at 0x%08lx\n", ptr);
return;
}
@ -699,7 +696,7 @@ static void log_early(int op_type, const void *ptr, size_t size,
struct early_log *log;
if (crt_early_log >= ARRAY_SIZE(early_log)) {
kmemleak_stop("kmemleak: Early log buffer exceeded\n");
kmemleak_stop("Early log buffer exceeded\n");
return;
}
@ -966,7 +963,7 @@ static void kmemleak_scan(void)
* 1 reference to any object at this point.
*/
if (atomic_read(&object->use_count) > 1) {
pr_debug("kmemleak: object->use_count = %d\n",
pr_debug("object->use_count = %d\n",
atomic_read(&object->use_count));
dump_object_info(object);
}
@ -1062,7 +1059,7 @@ static int kmemleak_scan_thread(void *arg)
{
static int first_run = 1;
pr_info("kmemleak: Automatic memory scanning thread started\n");
pr_info("Automatic memory scanning thread started\n");
/*
* Wait before the first scan to allow the system to fully initialize.
@ -1108,7 +1105,7 @@ static int kmemleak_scan_thread(void *arg)
timeout = schedule_timeout_interruptible(timeout);
}
pr_info("kmemleak: Automatic memory scanning thread ended\n");
pr_info("Automatic memory scanning thread ended\n");
return 0;
}
@ -1123,7 +1120,7 @@ void start_scan_thread(void)
return;
scan_thread = kthread_run(kmemleak_scan_thread, NULL, "kmemleak");
if (IS_ERR(scan_thread)) {
pr_warning("kmemleak: Failed to create the scan thread\n");
pr_warning("Failed to create the scan thread\n");
scan_thread = NULL;
}
}
@ -1367,7 +1364,7 @@ static void kmemleak_cleanup(void)
cleanup_thread = kthread_run(kmemleak_cleanup_thread, NULL,
"kmemleak-clean");
if (IS_ERR(cleanup_thread))
pr_warning("kmemleak: Failed to create the clean-up thread\n");
pr_warning("Failed to create the clean-up thread\n");
}
/*
@ -1488,8 +1485,7 @@ static int __init kmemleak_late_init(void)
dentry = debugfs_create_file("kmemleak", S_IRUGO, NULL, NULL,
&kmemleak_fops);
if (!dentry)
pr_warning("kmemleak: Failed to create the debugfs kmemleak "
"file\n");
pr_warning("Failed to create the debugfs kmemleak file\n");
mutex_lock(&kmemleak_mutex);
start_scan_thread();
mutex_unlock(&kmemleak_mutex);