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| author | Frank Ch. Eigler <fche@elastic.org> | 2009-03-27 12:15:19 -0400 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@elastic.org> | 2009-03-27 12:15:19 -0400 |
| commit | e904ad9554d7eb3363612f4f32141c6dbc4f50d4 (patch) | |
| tree | edd86436170bad118b16b61e0f64708e3f089c85 /stapprobes.3stap.in | |
| parent | 28f569c22b5a4ec666be5ccdf26fd194d3643c29 (diff) | |
| download | systemtap-steved-e904ad9554d7eb3363612f4f32141c6dbc4f50d4.tar.gz systemtap-steved-e904ad9554d7eb3363612f4f32141c6dbc4f50d4.tar.xz systemtap-steved-e904ad9554d7eb3363612f4f32141c6dbc4f50d4.zip | |
PR6819: clarify syntactic vs. semantic probe point validity
Diffstat (limited to 'stapprobes.3stap.in')
| -rw-r--r-- | stapprobes.3stap.in | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/stapprobes.3stap.in b/stapprobes.3stap.in index f175e6e0..a8988c71 100644 --- a/stapprobes.3stap.in +++ b/stapprobes.3stap.in @@ -49,12 +49,16 @@ including alias's body is skipped. The condition is stacked up through all levels of alias/wildcard expansion. So the final condition becomes the logical-and of conditions of all expanded alias/wildcard. -These are all syntactically valid probe points: +These are all +.B syntactically +valid probe points. (They are generally +.B semantically +invalid, depending on the contents of the tapsets, and the versions of +kernel/user software installed.) .SAMPLE kernel.function("foo").return -syscall(22) -user.inode("/bin/vi").statement(0x2222) +process("/bin/vi").statement(0x2222) end syscall.* kernel.function("no_such_function") ? @@ -62,6 +66,7 @@ module("awol").function("no_such_function") ! signal.*? if (switch) .ESAMPLE + Probes may be broadly classified into "synchronous" and "asynchronous". A "synchronous" event is deemed to occur when any processor executes an instruction matched by the specification. This |