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Align pagemap entries to OS_PAGE_SIZE

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Guarantee the page map is page aligned.  Fix public API.
This commit is contained in:
Matthew Parkinson
2019-01-18 15:22:08 +00:00
parent 62ad70b17e
commit a62e77f930
2 changed files with 29 additions and 13 deletions
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17
src/mem/pagemap.h
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@@ -86,7 +86,8 @@ namespace snmalloc
value, (PagemapEntry*)LOCKED_ENTRY, std::memory_order_relaxed))
{
auto& v = default_memory_provider;
value = (PagemapEntry*)v.alloc_chunk(PAGEMAP_NODE_SIZE);
value =
(PagemapEntry*)v.alloc_chunk(PAGEMAP_NODE_SIZE, OS_PAGE_SIZE);
e->store(value, std::memory_order_release);
}
else
@@ -160,6 +161,13 @@ namespace snmalloc
return &(leaf_ix.first->values[leaf_ix.second]);
}
std::atomic<T>* get_ptr(void* p)
{
bool success;
return get_addr<true>(p, success);
}
public:
/**
* Returns the index of a pagemap entry within a given page. This is used
* in code that propagates changes to the pagemap elsewhere.
@@ -182,13 +190,6 @@ namespace snmalloc
reinterpret_cast<uintptr_t>(get_addr<true>(p, success)));
}
std::atomic<T>* get_ptr(void* p)
{
bool success;
return get_addr<true>(p, success);
}
public:
T get(void* p)
{
bool success;