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Implement chunk hook support for page run commit/decommit.

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Cascade from decommit to purge when purging unused dirty pages, so that
it is possible to decommit cleaned memory rather than just purging.  For
non-Windows debug builds, decommit runs rather than purging them, since
this causes access of deallocated runs to segfault.

This resolves #251.
This commit is contained in:
Jason Evans
2015-08-04 10:49:46 -07:00
parent 5716d97f75
commit 8fadb1a8c2
15 changed files with 561 additions and 283 deletions
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8
src/chunk_mmap.c
View File

@@ -4,7 +4,7 @@
/******************************************************************************/
static void *
chunk_alloc_mmap_slow(size_t size, size_t alignment, bool *zero)
chunk_alloc_mmap_slow(size_t size, size_t alignment, bool *zero, bool *commit)
{
void *ret, *pages;
size_t alloc_size, leadsize;
@@ -24,11 +24,12 @@ chunk_alloc_mmap_slow(size_t size, size_t alignment, bool *zero)
assert(ret != NULL);
*zero = true;
*commit = true;
return (ret);
}
void *
chunk_alloc_mmap(size_t size, size_t alignment, bool *zero)
chunk_alloc_mmap(size_t size, size_t alignment, bool *zero, bool *commit)
{
void *ret;
size_t offset;
@@ -55,11 +56,12 @@ chunk_alloc_mmap(size_t size, size_t alignment, bool *zero)
offset = ALIGNMENT_ADDR2OFFSET(ret, alignment);
if (offset != 0) {
pages_unmap(ret, size);
return (chunk_alloc_mmap_slow(size, alignment, zero));
return (chunk_alloc_mmap_slow(size, alignment, zero, commit));
}
assert(ret != NULL);
*zero = true;
*commit = true;
return (ret);
}