diff options
| author | fche <fche> | 2006-01-03 22:33:53 +0000 |
|---|---|---|
| committer | fche <fche> | 2006-01-03 22:33:53 +0000 |
| commit | 9a604face6354d63a3948a08e85613168a9dfb88 (patch) | |
| tree | 3b4f269604baebeb2da9c84e973bed06202bd980 /stap.1.in | |
| parent | f256184bbdab4cf63c5ad8917e5b8a31de497fb9 (diff) | |
| download | systemtap-steved-9a604face6354d63a3948a08e85613168a9dfb88.tar.gz systemtap-steved-9a604face6354d63a3948a08e85613168a9dfb88.tar.xz systemtap-steved-9a604face6354d63a3948a08e85613168a9dfb88.zip | |
2006-01-03 Frank Ch. Eigler <fche@redhat.com>
PR 1144, 1379
* tapsets.cxx (emit_probe_prologue, _epilogue): New routines.
Call from existing derived_probe spots. Implement soft errors in
epilogue code. Implement reentrancy detection in prologue code.
(dwarf_derived_probe::emit_deregistration): Add kprobes layer
"nmissed" to skipped_count.
* translate.cxx (varlock): Use nsleep(TRYLOCKDELAY) in lock
contention loop.
(emit_module_exit): Report number of soft errors and skipped probes.
(emit_function, _probe): Add __restrict__ marker to context pointer.
(translate_pass): Define new MAXTRYLOCK, TRYLOCKDELAY, MAXERRORS,
MAXSKIPPED parameters.
* tapset/logging.stp (error): Don't stp_error, just set context state.
* stap.1.in, stapfuncs.5.in: Document soft errors.
* elaborate.h: Corresponding changes.
2006-01-03 Frank Ch. Eigler <fche@redhat.com>
* io.c (_stp_softerror): New function.
2006-01-03 Frank Ch. Eigler <fche@redhat.com>
* systemtap.base/timers.exp: Extend the test run duration.
Accept skipped probe warnings at shutdown.
Diffstat (limited to 'stap.1.in')
| -rw-r--r-- | stap.1.in | 13 |
1 files changed, 10 insertions, 3 deletions
@@ -50,7 +50,7 @@ a named file, from standard input, or from the command line. The program runs until it is interrupted by the user, or if the script voluntarily invokes the .I exit() -function, or by any fatal error. +function, or by sufficient number of soft errors. .PP The language, which is described in a later section, is strictly typed, declaration free, procedural, and inspired by @@ -639,8 +639,9 @@ the module then communicates with it, copying trace data from the kernel into temporary files, until the user sends an interrupt signal. Any run-time error encountered by the probe handlers, such as running out of memory, division by zero, exceeding nesting or runtime limits, -results in an error condition that prevents further probes from -running. Finally, stpd unloads the module, and cleans up. +results in a soft error indication. Soft errors in excess of +MAXERRORS block of all subsequent probes, and terminate the session. +Finally, stpd unloads the module, and cleans up. .SH EXAMPLES See the @@ -692,6 +693,12 @@ Maximum number of statements to execute during any single probe hit. .TP MAXMAPENTRIES Maximum number of rows in any single global array. +.TP +MAXERRORS +Maximum number of soft errors before an exit is triggered. +.TP +MAXSKIPPED +Maximum number of skipped reentrant probes before an exit is triggered. .PP In case something goes wrong with |