66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
namespace factor {
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#if defined(WINDOWS) && defined(FACTOR_64)
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const cell seh_area_size = 1024;
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#else
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const cell seh_area_size = 0;
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#endif
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struct code_heap {
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// The actual memory area
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segment* seg;
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// Memory area reserved for safepoint guard page
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cell safepoint_page;
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// Memory area reserved for SEH. Only used on Windows
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char* seh_area;
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// Memory allocator
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free_list_allocator<code_block>* allocator;
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// For fast lookup of blocks from addresses.
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std::set<cell> all_blocks;
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// Code blocks are initialized in two steps in
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// primitive_modify_code_heap() because they might reference each
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// other. First they are all allocated and placed in this map with
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// their literal tables which are GC roots until the block is
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// initialized. Then they are all initialized by
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// initialize_code_block() which resolves relocations and updates
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// addresses. Uninitialized blocks instructions must not be visited
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// by GC.
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std::map<code_block*, cell> uninitialized_blocks;
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// Code blocks which may reference objects in the nursery
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std::set<code_block*> points_to_nursery;
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// Code blocks which may reference objects in aging space or the nursery
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std::set<code_block*> points_to_aging;
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explicit code_heap(cell size);
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~code_heap();
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void write_barrier(code_block* compiled);
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void clear_remembered_set();
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bool uninitialized_p(code_block* compiled);
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void free(code_block* compiled);
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void flush_icache();
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void set_safepoint_guard(bool locked);
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void verify_all_blocks_set();
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void initialize_all_blocks_set();
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cell high_water_mark() { return allocator->size / 20; }
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void sweep();
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code_block* code_block_for_address(cell address);
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cell frame_predecessor(cell frame_top);
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bool safepoint_p(cell addr) {
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cell page_mask = ~(getpagesize() - 1);
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return (addr & page_mask) == safepoint_page;
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}
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};
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}
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