Re: [Jikesrvm-researchers] Mapping from IP to Object via VM_CodeArray

[Ian R. <ian...@ma...>]

Mathias Payer wrote:
> Is there a way to check if the region is mapped and in use by Jikes?
> (I think that the CopyingGC maybe freed the memory and the sample points
> in the old space...)
>   
Hi Mathias,

you can always see what pages are mapped to a process in Linux by having 
a look at /proc/<PID of Jikes RVM>/maps . Where the PID is the program 
identifier of the Jikes RVM determinable from either top or ps. E.g.

irogers>ps
  PID TTY          TIME CMD
23243 pts/14   00:00:00 bash
28511 pts/14   00:00:00 JikesRVM
28526 pts/14   00:00:00 ps
irogers>cat /proc/28511/maps
08048000-0805e000 r-xp 00000000 09:03 43729527   /xxx/JikesRVM
0805e000-08060000 rwxp 00016000 09:03 43729527   /xxx/JikesRVM
08060000-08081000 rwxp 08060000 00:00 0          [heap]
40000000-40015000 r-xp 00000000 09:02 2268585    /lib/ld-2.3.5.so
40015000-40017000 rwxp 00014000 09:02 2268585    /lib/ld-2.3.5.so
40017000-40019000 r-xp 00000000 09:03 43729529   /xxx/libsyswrap.so
40019000-4001a000 rwxp 00001000 09:03 43729529   /xxx/libsyswrap.so
4001a000-4001b000 rwxp 4001a000 00:00 0
4001b000-40027000 r-xp 00000000 09:03 43729523   /xxx/libjavalang.so
40027000-40028000 rwxp 0000b000 09:03 43729523   /xxx/libjavalang.so
40028000-4002c000 r-xp 00000000 09:03 43729520   /xxx/libjavaio.so
4002c000-4002d000 rwxp 00003000 09:03 43729520   /xxx/libjavaio.so
4002d000-40032000 r-xp 00000000 09:03 43729525   /xxx/libjavanio.so
40032000-40033000 rwxp 00004000 09:03 43729525   /xxx/libjavanio.so
40033000-40035000 r-xp 00000000 09:03 43729528   /xxx/libjpnexec.so
40035000-40036000 rwxp 00001000 09:03 43729528   /xxx/libjpnexec.so
40041000-40043000 r-xp 00000000 09:02 2268600    /lib/libdl-2.3.5.so
40043000-40045000 rwxp 00001000 09:02 2268600    /lib/libdl-2.3.5.so
40045000-40053000 r-xp 00000000 09:02 2268635    
/lib/tls/libpthread-2.3.5.so
40053000-40055000 rwxp 0000d000 09:02 2268635    
/lib/tls/libpthread-2.3.5.so
40055000-40057000 rwxp 40055000 00:00 0
40057000-40129000 r-xp 00000000 09:02 1932625    /usr/lib/libstdc++.so.6.0.6
40129000-4012e000 rwxp 000d2000 09:02 1932625    /usr/lib/libstdc++.so.6.0.6
4012e000-40133000 rwxp 4012e000 00:00 0
40133000-40157000 r-xp 00000000 09:02 2268633    /lib/tls/libm-2.3.5.so
40157000-40159000 rwxp 00023000 09:02 2268633    /lib/tls/libm-2.3.5.so
40159000-40163000 r-xp 00000000 09:02 2268641    /lib/libgcc_s.so.1
40163000-40164000 rwxp 00009000 09:02 2268641    /lib/libgcc_s.so.1
40164000-40165000 rwxp 40164000 00:00 0
40165000-4027e000 r-xp 00000000 09:02 2268631    /lib/tls/libc-2.3.5.so
4027e000-4027f000 r-xp 00119000 09:02 2268631    /lib/tls/libc-2.3.5.so
4027f000-40282000 rwxp 0011a000 09:02 2268631    /lib/tls/libc-2.3.5.so
40282000-40285000 rwxp 40282000 00:00 0
40285000-40286000 ---p 40285000 00:00 0
40286000-40486000 rwxp 40286000 00:00 0
47000000-49f5a000 rwxp 00000000 09:03 43729518   /xxx/RVM.image
57000000-57100000 rwxp 57000000 00:00 0
59000000-59100000 rwxp 59000000 00:00 0
5b000000-5b100000 rwxp 5b000000 00:00 0
a0c00000-a0d00000 rwxp a0c00000 00:00 0
bf9ba000-bf9d0000 rwxp bf9ba000 00:00 0          [stack]
ffffe000-fffff000 ---p 00000000 00:00 0          [vdso]

Regards,

Ian Rogers