diff options
Diffstat (limited to 'linker/linker_block_allocator.cpp')
-rw-r--r-- | linker/linker_block_allocator.cpp | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/linker/linker_block_allocator.cpp b/linker/linker_block_allocator.cpp index dca944e9c..34df9a5d8 100644 --- a/linker/linker_block_allocator.cpp +++ b/linker/linker_block_allocator.cpp @@ -52,7 +52,8 @@ LinkerBlockAllocator::LinkerBlockAllocator(size_t block_size) : block_size_( round_up(block_size < sizeof(FreeBlockInfo) ? sizeof(FreeBlockInfo) : block_size, 16)), page_list_(nullptr), - free_block_list_(nullptr) + free_block_list_(nullptr), + allocated_(0) {} void* LinkerBlockAllocator::alloc() { @@ -73,6 +74,8 @@ void* LinkerBlockAllocator::alloc() { memset(block_info, 0, block_size_); + ++allocated_; + return block_info; } @@ -101,6 +104,11 @@ void LinkerBlockAllocator::free(void* block) { block_info->num_free_blocks = 1; free_block_list_ = block_info; + + --allocated_; + if (allocated_ == 0) { + free_all_pages(); + } } void LinkerBlockAllocator::protect_all(int prot) { @@ -151,3 +159,18 @@ LinkerBlockAllocatorPage* LinkerBlockAllocator::find_page(void* block) { abort(); } + +void LinkerBlockAllocator::free_all_pages() { + if (allocated_) { + abort(); + } + + LinkerBlockAllocatorPage* page = page_list_; + while (page) { + LinkerBlockAllocatorPage* next = page->next; + munmap(page, PAGE_SIZE); + page = next; + } + page_list_ = nullptr; + free_block_list_ = nullptr; +} |