similar to: access to errno when using pid provider

I''m interested in monitoring the amount of stack used by a multi-threaded program. I assume ''stackdepth'' built-in would be useful...but not sure. Been through demo''s, ToolKit, and internals..but it''s just not clicking for me yet. Not sure how to measure start/end of stack size dynamically...Anyone know how to break this down? This message posted from

I''ve been trying to get access to a userland string that''s behind a second level pointer using DTrace, but I can''t seem to get it to work. I started with the example on the Team DTrace Tips and Tricks slides: trace(copyinstr(*(uintptr_t *)copyin(arg0, curpsinfo->pr_dmodel == PR_MODEL_ILP32 ? 4 : 8))); And when I couldn''t get it to work, I started

How would I determine the address of the ulwp_t structure for the current thread of a process from a 32-bit i386 executable looking at a 32-bit executable? (This is in support of a fix for 6593259: "libdtrace should prefer pid probes to breakpoints".) For example, if I compile the following code 64-bit snippet, I can get that address from 32-bit or 64-bit executables:

Hi all, OK, so this at first looked like a clear cut "Don''t do it, or at worst handle the results" issue my customer has come to me with, but the more we discuss it, the more it looks like we should have better ways of dealing with this issue. > We have user defined dtrace probe points in the application which use > as parameter 64 bit values: > > provider adv {

Hi, I was going through the implementation of the fasttrap provider. I found that when displaced execution happens (ie., when the instruction traced is being executed out of the scratch space) if an asynchrnous signal comes we need to defer the delivery. Can somebody explain why this is necessary and how is it implemented? Thanks in advance Saravanan S -------------- next part -------------- An

Just to let people know what my big picture is, I''m trying to write a script that will let me run a program, and name a progeny of that program that I want to debug. My script should find the first occurrence of that progeny, and run it until it finishes initializing the runtime linker, but stop it before it runs any shared library startup routines. (Failing that, I''d be okay

HI there, I?ve discovered DTrace few days ago and I?m currently stuck on a cpu stats problem. I?m trying to poll the cpu_t.cpu_acct[] array to pull idle, system and user values. So, I made this little script: ------------------------------------------------------------------------------------------------------ #!/usr/sbin/dtrace -s #pragma D option quiet this uint64_t start; this hrtime_t

Hello, I see a reproducable panic when doing ibping and aborting it with ^C. My setup is two machines with Mellanox Infinihost III HCAs (one Linux one FreeBSD) connected back-to-back. Details below. I can upload 2 crash dumps, if this is useful. For some reason the port doesn't become ACTIVE, so no packets arrive, but that is probably unrelated. % uname -a FreeBSD cosel.inf.tu-dresden.de

The vendor wanted to come in and replace an HDD in the 2nd X4500, as it was "constantly busy", and since our x4500 has always died miserably in the past when a HDD dies, they wanted to replace it before the HDD actually died. The usual was done, HDD replaced, resilvering started and ran for about 50 minutes. Then the system hung, same as always, all ZFS related commands would just

Hi I encountered this problem a few times in the past, but only now it is consistent enough so I can write this email. In short, the problem is that after I copy some structure from the profiled program to the dtrace space, and set a "this-dataP" variable to point to the local copy, after a while some of the fields of the local structure are overridden with junk values. In

Hi, I have a situation where a DTrace script is printing out extra characters, despite the copyin() call giving a specific length. Can anyone think of why this might be? It''s fine the first time all of the probes fire, but on a second run of my generating operations, I get junk in there. For example: set setop length 5, FOUND KEY, STORED set setop length 5, FOUND KEY, STORED get

I have a clause that look like this: syscall::write:entry /execname == "ntpd" && self->recspec/ { speculate(self->recspec); printf(" fd=%d buf=%d\n%s",arg0,arg2, stringof(copyin(arg1,arg2-1))); } The ntpd program always write a \n trminated string in this context, so I used the "arg2-1" to drop the \n. This works

Hi all, I am trying to write a D script which would print ustack() for every program in the system receiving SIGSEGV. All the stacks printed in trap()/sigtoproc() context do not have meaningful symbols. The following solves the problem to some degree but I''d much rather have a self-contained D script. dtrace -w -n ''fbt:genunix:sigtoproc:entry/arg2 == 11/ {

[1] Predicates in one-liners I would like to list the probe modules in my executable and then dynamically create a dscript to trace execution of those modules alone (by excluding the 3rd party and system libraries). I tried the below script without success. The conditional given in the predicate is not taking effect. Why is this so ? $ dtrace -ln ''pid$target:::

Hi Expert I want to use dtrace to monitor the content change of one file. I made following scripts, #!/usr/sbin/dtrace -s inline int MYPID = $1; syscall::write:entry /pid == MYPID/ { tracemem(arg1, arg2); printf("\n"); } It always has an following error bash-3.00$ sudo dumpFIFO.dtrace 3836 dtrace: failed to compile script ./dumpFIFO.dtrace: line 19: tracemem( ) argument #2

I''m using a fbt probe where I get a system call id as an argument, how do I look up the name of it? At the moment I''m post-processing the output using /etc/name/to_sysnum but that doesn''t feel right :) cheers, /Martin -- This message posted from opensolaris.org

From: Maros Zatko <hacxman@gmail.com> This adds --copy SOURCE:DEST, equivalent of calling g#cp_a src dst. RFE: RHBZ#1203817 Maros Zatko (1): customize: add --copy builder/cmdline.ml | 2 +- customize/customize_run.ml | 4 ++++ generator/customize.ml | 10 ++++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) -- 1.9.3

Perhaps someone has ideas on this topic, a recent attempt to play with Xen was a reather unlucky event, all what I will be able to demonstrate on that system is a PV ONNV domU which ikely will not be very attractive to the audience :( HW: U40M2, 2 x 2 core AMD revF procs, 8GB MEM, Phonix BIOS 1.5 (latest) 1 x 200GB internal SATA drive SW: dom0 ONNV build 82, latest VirtManager from

hi, I''m using the PID provider to trace a 32-bit app, prtdiag. I''m trying to print the value of "propname" (arg1) in the following func: int picl_get_propval_by_name(picl_nodehdl_t nodeh, const char *propname, void *valbuf, size_t nbytes) ... i''ve tried many versions, but this is a representative one: 53 this string propname; 54 55

There is a Slashdot discussion today titled "Cambridge Researcher Breaks OpenBSD Systrace". Slashdot anonymous member has a comment "Even Sun''s Dtrace might be vulnerable." I don''t think it is. Comments? Exploiting Concurrency Vulnerabilities in System Call Wrappers http://www.watson.org/~robert/2007woot/2007usenixwoot-exploitingconcurrency.pdf Abstract