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support zero-initialized memory detection

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daan 2019-09-02 13:16:52 -07:00
parent 216d75a222
commit d1bd1644d5
9 changed files with 123 additions and 48 deletions
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9
include/mimalloc-types.h
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@ -131,9 +131,11 @@ typedef enum mi_delayed_e {
// test if both are false (`value == 0`) in the `mi_free` routine.
typedef union mi_page_flags_u {
uint16_t value;
uint8_t full_aligned;
struct {
bool in_full;
bool has_aligned;
bool in_full:1;
bool has_aligned:1;
bool is_zero; // `true` if the blocks in the free list are zero initialized
};
} mi_page_flags_t;
@ -165,7 +167,8 @@ typedef struct mi_page_s {
bool segment_in_use:1; // `true` if the segment allocated this page
bool is_reset:1; // `true` if the page memory was reset
bool is_committed:1; // `true` if the page virtual memory is committed
bool is_zero_init:1; // `true` if the page was zero initialized
// layout like this to optimize access in `mi_malloc` and `mi_free`
uint16_t capacity; // number of blocks committed, must be the first field, see `segment.c:page_clear`
uint16_t reserved; // number of blocks reserved in memory