'Retrieving the memory map of its own process in OS X 10.5/10.6
In Linux, the easiest way to look at a process' memory map is looking at /proc/PID/maps, giving something like this:
08048000-08056000 r-xp 00000000 03:0c 64593 /usr/sbin/gpm 08056000-08058000 rw-p 0000d000 03:0c 64593 /usr/sbin/gpm 08058000-0805b000 rwxp 00000000 00:00 0 40000000-40013000 r-xp 00000000 03:0c 4165 /lib/ld-2.2.4.so 40013000-40015000 rw-p 00012000 03:0c 4165 /lib/ld-2.2.4.so 4001f000-40135000 r-xp 00000000 03:0c 45494 /lib/libc-2.2.4.so 40135000-4013e000 rw-p 00115000 03:0c 45494 /lib/libc-2.2.4.so 4013e000-40142000 rw-p 00000000 00:00 0 bffff000-c0000000 rwxp 00000000 00:00 0
How can a process get the equivalent information (address ranges, protection, mapped filename, etc...) about a process' own memory map under OSX 10.5 or 10.6?
Solution 1:[1]
Take a look at this thread from 2007 on the Darwin-kernel mailing list. In a nutshell, your choices are to popen vmmap (which is setgid appropriately) or use the Mach VM region APIs in /usr/include/mach/mach_vm.h. I found a decent example of using the Mach API in the Sage Mathematics System sources.
Solution 2:[2]
A couple more links for those looking for vmmap source (it's not published):
- http://www.newosxbook.com/src.jl?tree=listings&file=12-1-vmmap.c
- https://code.google.com/p/psutil/source/browse/psutil/_psutil_osx.c#274 (get_process_memory_maps) and https://code.google.com/p/psutil/issues/detail?id=260
Getting the the mapped file name and the names of libraries from dyld_shared_cache: https://stackoverflow.com/a/17180619/1026
Solution 3:[3]
GNUlib (http://www.gnu.org/software/gnulib/) contains a function for iterating over all the virtual memory segments in most OSes including MAC OS X. It's in vma-iter.c
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Ben Stiglitz |
| Solution 2 | Community |
| Solution 3 | Dan Fego |