Hi Joel,
I did not notice you are running macos. Disregard my script as it is
for solaris.
Sorry, I don't know anything about macos.
max
Joel Reymont wrote:
I need to identify page-ins by library so the following script is what
I use right now.
The problem is that Snow Leopard, and I'm sure Leopard too, cache
things in the Unified Buffer Cache (UBC). The purge command does not
evict certain portions of the cache (anonymously mmaped pages?) so the
code stays cached. I do see page-ins after a reboot, though.
Note that the dynamic linker entry point for libraries is
dyld??loadPhase*, although Firefox uses dlopen for some libraries.
---%<---
typedef struct nameidata* nameidata_t; /* sys/namei.h */
pid$target::dlopen:entry
/arg0/
{
self->ppath = arg0;
self->dylib = 1;
}
pid$target::dyld??loadPhase5*:entry,
pid$target::dyld??loadPhase4*:entry
/!self->dylib && arg0/
{
self->path = copyinstr(arg0);
self->func = probefunc;
self->dylib = 1;
}
pid$target::dlopen:return
{
self->dylib = 0;
}
pid$target::dyld??loadPhase5*:return,
pid$target::dyld??loadPhase4*:return
/self->func != 0 && self->func == probefunc/
{
self->dylib = 0;
}
/* file name memory should be wired in by now */
pid$target::open:entry
/self->dylib && self->ppath && self->path == 0/
{
self->path = copyinstr(self->ppath);
}
fbt::vn_open_auth:entry
{
self->ndp = (nameidata_t)arg0;
}
/* wait to make sure ndp and vnode are fully populated */
fbt::vn_open_auth:return
/self->path != 0/
{
self->curpath = stringof((self->ndp)->ni_pathbuf);
}
/* make sure we are opening the same file */
fbt::vn_open_auth:return
/self->curpath != 0 && self->path == self->curpath/
{
this->vp = (vnode_t)(self->ndp)->ni_vp;
this->lib = stringof((this->vp)->v_name);
self->lib[this->lib] = self->path;
self->vnode[this->lib] = this->vp;
/*
printf("match = %s, lib = %s, vnode: %x\n",
self->curpath, this->lib, (long)this->vp);
*/
}
fbt::vn_open_auth:return
{
self->path = 0;
self->ppath = 0;
self->curpath = 0;
self->ndp = 0;
self->func = 0;
self->dylib = 0;
}
fbt::vnode_pagein:entry
{
self->v_name = stringof(((vnode_t)arg0)->v_name);
}
/* vnode pointers should match but v_name seems more secure */
fbt::vnode_pagein:entry
/self->lib[self->v_name] != 0/
{
printf("vnode_pagein: %s, offset: %u, size: %u\n",
self->v_name, arg3, arg4);
}
---
firefox for android!
http://wagerlabs.com
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