Aaron Patterson tenderlove
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tenderlove
/ foo.c
Created
June 24, 2020 20:44
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| page_body = (struct heap_page_body *)rb_aligned_malloc(HEAP_PAGE_ALIGN, HEAP_PAGE_SIZE); | |
| /* cut.. */ | |
| page = calloc1(sizeof(struct heap_page)); | |
| /* cut.. */ | |
| assert((getpagesize() * 4) == HEAP_PAGE_ALIGN); | |
| intptr_t page_body_end = (intptr_t)page_body + (getpagesize() * 4); |
tenderlove
/ foo.c
Created
June 24, 2020 20:44
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| page_body = (struct heap_page_body *)rb_aligned_malloc(HEAP_PAGE_ALIGN, HEAP_PAGE_SIZE); | |
| /* cut.. */ | |
| page = calloc1(sizeof(struct heap_page)); |
tenderlove
/ read-barrier-code.rb
Created
June 24, 2020 20:44
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| def segv_handler(info) | |
| # Only triggered if someone tried to read from a MOVED location | |
| move_all_objects_back(find_page(info.read_address)) | |
| end | |
| def compact | |
| register_segv_handler :segv_handler | |
| ruby_heap.pages.each do |page| | |
| move_objects_on(page) |
tenderlove
/ foo.c
Created
June 24, 2020 20:43
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| REQUIRED_SIZE_BY_MALLOC = (sizeof(size_t) * 5), | |
| HEAP_PAGE_SIZE = (HEAP_PAGE_ALIGN - REQUIRED_SIZE_BY_MALLOC), |
tenderlove
/ foo.c
Created
June 24, 2020 20:43
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| /* assign heap_page body (contains heap_page_header and RVALUEs) */ | |
| page_body = (struct heap_page_body *)rb_aligned_malloc(HEAP_PAGE_ALIGN, HEAP_PAGE_SIZE); | |
| if (page_body == 0) { | |
| rb_memerror(); | |
| } | |
| /* assign heap_page entry */ | |
| page = calloc1(sizeof(struct heap_page)); | |
| if (page == 0) { | |
| rb_aligned_free(page_body); |
tenderlove
/ foo.c
Created
June 24, 2020 20:42
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| struct heap_page_header { | |
| struct heap_page *page; | |
| }; | |
| struct heap_page_body { | |
| struct heap_page_header header; | |
| /* char gap[]; */ | |
| /* RVALUE values[]; */ | |
| }; |
tenderlove
/ foo.c
Created
June 24, 2020 20:41
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| struct heap_page_header { | |
| struct heap_page *page; | |
| }; | |
| struct heap_page_body { | |
| struct heap_page_header header; | |
| /* char gap[]; */ | |
| /* RVALUE values[]; */ | |
| }; |
tenderlove
/ gist:9c40b50aa3b64a9b6e0002e99672504d
Created
June 24, 2020 20:41
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| struct heap_page_header { | |
| struct heap_page *page; | |
| }; | |
| struct heap_page_body { | |
| struct heap_page_header header; | |
| /* char gap[]; */ | |
| /* RVALUE values[]; */ | |
| }; |
tenderlove
/ heap_page_struct.c
Created
June 24, 2020 20:39
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| struct heap_page { | |
| short total_slots; | |
| short free_slots; | |
| short pinned_slots; | |
| short final_slots; | |
| struct { | |
| unsigned int before_sweep : 1; | |
| unsigned int has_remembered_objects : 1; | |
| unsigned int has_uncollectible_shady_objects : 1; | |
| unsigned int in_tomb : 1; |
tenderlove
/ heap_page_struct.c
Created
June 24, 2020 20:39
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| struct heap_page { | |
| short total_slots; | |
| short free_slots; | |
| short pinned_slots; | |
| short final_slots; | |
| struct { | |
| unsigned int before_sweep : 1; | |
| unsigned int has_remembered_objects : 1; | |
| unsigned int has_uncollectible_shady_objects : 1; | |
| unsigned int in_tomb : 1; |