diff options
| -rw-r--r-- | NEWS | 37 |
1 files changed, 31 insertions, 6 deletions
@@ -1,5 +1,30 @@ * What's new +- All user-space-related probes support $PATH-resolved executable + names, so + + probe process("ls").syscall {} + probe process("./a.out").syscall {} + + work now, instead of just + + probe process("/bin/ls").syscall {} + probe process("/my/directory/a.out").syscall {} + +- Prototype symbolic user-space probing support: + + # stap -e 'probe process("ls").function("*").call { + log (probefunc()." ".$$parms) + }' \ + -c 'ls -l' + + This requires: + - debugging information for the named program + - a version of utrace in the kernel that is compatible with the "uprobes" + kernel module prototype. This includes RHEL5 and older Fedora, but not + yet current lkml-track utrace; a "pass 4a"-time build failure means + your system cannot use this yet. + - Prototype systemtap client and compile server are now available. These allow you to compile a systemtap module on a host other than the one which it will be run, providing the client and server @@ -10,10 +35,10 @@ was specified. See stap-server(8) for more details. - Global variables which are written to but never read are now - automatically displayed when the session does a shutdown. For example: + automatically displayed when the session does a shutdown. For example: - global running_tasks - probe timer.profile {running_tasks[pid(),tid()] = execname()} + global running_tasks + probe timer.profile {running_tasks[pid(),tid()] = execname()} probe timer.ms(8000) {exit()} - A formatted string representation of the variables, parameters, or local @@ -109,7 +134,7 @@ printf ("%*d", four, two) // prints <space><space><space>2 - Preprocessor conditional expressions can now include wildcard style - matches on kernel versions. + matches on kernel versions. %( kernel_vr != "*xen" %? foo %: bar %) - Prototype support for user-space probing is showing some progress. @@ -303,12 +328,12 @@ handlers are invoked, as a safety improvement. - Add an optional numeric parameter for begin/end probe specifications, - to order their execution. + to order their execution. probe begin(10) { } /* comes after */ probe begin(-10) {} - Add an optional array size declaration, which is handy for very small or very large ones. - global little[5], big[20000] + global little[5], big[20000] - Include some example scripts along with the documentation. |