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fixed bug in buffer debug code in allocator

This commit is contained in:
Arvid Norberg 2011-04-17 08:39:52 +00:00
parent 8e92cad2db
commit a15b23f8e8
1 changed files with 2 additions and 2 deletions
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4
src/allocator.cpp
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@ -92,7 +92,7 @@ namespace libtorrent
{
#ifdef TORRENT_DEBUG_BUFFERS
int page = page_size();
int num_pages = (bytes + (page-1)) + 2;
int num_pages = (bytes + (page-1)) / page + 2;
char* ret = (char*)valloc(num_pages * page);
// make the two surrounding pages non-readable and -writable
alloc_header* h = (alloc_header*)ret;
@ -135,7 +135,7 @@ namespace libtorrent
// make the two surrounding pages non-readable and -writable
mprotect(block - page, page, PROT_READ | PROT_WRITE);
alloc_header* h = (alloc_header*)(block - page);
int num_pages = (h->size + (page-1)) + 2;
int num_pages = (h->size + (page-1)) / page + 2;
TORRENT_ASSERT(h->magic == 0x1337);
mprotect(block + (num_pages-2) * page, page, PROT_READ | PROT_WRITE);
// fprintf(stderr, "free: %p head: %p tail: %p size: %d\n", block, block - page, block + h->size, int(h->size));