diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 41 |
1 files changed, 40 insertions, 1 deletions
@@ -1,4 +1,19 @@ -* What's new +* What's new in version 0.9.5 + + - New probes process().insn and process().insn.block that allows + inspection of the process after each instruction or block of + instructions executed. So to count the total number of instructions + a process executes during a run do something like: + $ stap -e 'global steps; probe process("/bin/ls").insn {steps++} + probe end {printf("Total instructions: %d\n", steps);}' \ + -c /bin/ls + This feature can slow down execution of a process somewhat. + + - Systemtap probes and function man pages extracted from the tapsets + are now available under 3stap. To show the page for probe vm.pagefault + or the stap function pexecname do: + $ man 3stap vm.pagefault + $ man 3stap pexecname - Kernel tracepoints are now supported for probing predefined kernel events without any debuginfo. Tracepoints incur less overhead than @@ -39,6 +54,30 @@ This replaces any dwarf $variable expressions that could not be resolved with literal numeric zeros, along with a warning message. +- Both kernel markers and kernel tracepoint support argument listing + through stap -L 'kernel.mark("*")' or stap -L 'kernel.trace("*")' + +- Users can use -DINTERRUPTIBLE=0 to prevent interrupt reentrancy in + their script, at the cost of a bit more overhead to toggle the + interrupt mask. + +- Added reentrancy debugging. If stap is run with the arguments + "-t -DDEBUG_REENTRANCY", additional warnings will be printed for + every reentrancy event, including the probe points of the + resident and interloper probes. + +- Default to --disable-pie for configure. + Use --enable-pie to turn it back on. + +- Improved sdt.h compatibility and test suite for static dtrace + compatible user space markers. + +- Some architectures now use syscall wrappers (HAVE_SYSCALL_WRAPPERS). + The syscall tapset has been enhanced to take care of the syscall + wrappers in this release. + +- Security fix for CVE-2009-0784: stapusr module-path checking race. + * What's new in version 0.9 - Typecasting is now supported using the @cast operator. A script can |