问题
In the command line, i can use vmmap -v -purge 50554 to find the memory information of the process 50554, and get the output like below:
VIRTUAL RESIDENT DIRTY SWAPPED VOLATILE NONVOL EMPTY REGION
REGION TYPE SIZE SIZE SIZE SIZE SIZE SIZE SIZE COUNT (non-coalesced)
=========== ======= ======== ===== ======= ======== ====== ===== =======
Accelerate.framework 256K 256K 256K 0K 0K 256K 0K 3
Activity Tracing 2048K 40K 40K 0K 0K 0K 0K 2
......
VIRTUAL RESIDENT DIRTY SWAPPED ALLOCATION BYTES REGION
MALLOC ZONE SIZE SIZE SIZE SIZE COUNT ALLOCATED % FULL COUNT
=========== ======= ========= ========= ========= ========= ========= ====== ======
DefaultMallocZone_0x10453d000 532.5M 524.4M 476.8M 0K 3203739 424.3M 79% 829
DefaultPurgeableMallocZone_0x117c92000 14.2M 13.7M 13.7M 0K 3 14.2M 99% 4
WebKit Malloc_0x7fff7c65ecb8 12.0M 8928K 8756K 0K 3 12.0M 100% 3
QuartzCore_0x7fc9519bc000 1516K 1516K 1516K 0K 27313 1390K 91% 207
unnamed_zone_0x120a0a000 1024K 12K 12K 0K 4 224 0% 2
x-alloc_0x7fc95189ec00 12K 12K 12K 0K 48 1696 13% 1
x-alloc_0x7fc951047800 8K 8K 8K 0K 4 448 5% 1
GFXMallocZone_0x10598d000 0K 0K 0K 0K 0 0K 0
=========== ======= ========= ========= ========= ========= ========= ====== ======
TOTAL 561.1M 548.3M 500.5M 0K 3231114 451.8M 80% 1047
But is there any API that i can call the implement the same function?
回答1:
The answer to your question is somewhat complex, but can be found in the kernel source code for mach_vm_region_info(): https://opensource.apple.com/source/xnu/xnu-201/osfmk/vm/vm_debug.c
This code (among other things) runs through the VM map table and builds a linked list of structures which contain all of the info displayed by the vmmap(1) command.
来源：https://stackoverflow.com/questions/33337740/is-there-any-api-for-the-command-vmmap