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| author | Robert Morris <[email protected]> | 2019-07-11 05:41:59 -0400 |
|---|---|---|
| committer | Robert Morris <[email protected]> | 2019-07-11 05:41:59 -0400 |
| commit | 7797a384236cee31b924d27d8f814ef9543662cd (patch) | |
| tree | c6222d9a40f9ce0bc9f589525d33e882f1670a6b /kernel/kalloc.c | |
| parent | 4bc900e78bdbff3ba22ccccd26833cf70fd300b1 (diff) | |
| download | xv6-labs-7797a384236cee31b924d27d8f814ef9543662cd.tar.gz xv6-labs-7797a384236cee31b924d27d8f814ef9543662cd.tar.bz2 xv6-labs-7797a384236cee31b924d27d8f814ef9543662cd.zip | |
another test, to help with locking exercises
Diffstat (limited to 'kernel/kalloc.c')
| -rw-r--r-- | kernel/kalloc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/kalloc.c b/kernel/kalloc.c index afadb02..d72e0ab 100644 --- a/kernel/kalloc.c +++ b/kernel/kalloc.c @@ -55,8 +55,9 @@ kfree(void *pa) // Fill with junk to catch dangling refs. memset(pa, 1, PGSIZE); - acquire(&kmem.lock); r = (struct run*)pa; + + acquire(&kmem.lock); r->next = kmem.freelist; kmem.freelist = r; release(&kmem.lock); @@ -75,6 +76,7 @@ kalloc(void) if(r) kmem.freelist = r->next; release(&kmem.lock); + if(r) memset((char*)r, 5, PGSIZE); // fill with junk return (void*)r; |