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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-06-20 00:08:18 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-08-31 12:19:39 -0400 |
| commit | ab10d69eb714961d1eca4129e4f8cda5e0618f66 (patch) | |
| tree | a1706af78fe43a9a4b7bee56152fc673734def0a /kernel/trace | |
| parent | eb5bf81330a722d0079d28eed13d3a9355d938bf (diff) | |
| download | linux-ab10d69eb714961d1eca4129e4f8cda5e0618f66.tar.bz2 | |
tracing/uprobe: Add per-probe delete from event
Add per-probe delete method from one event passing the head of
definition. In other words, the events which match the head
N parameters are deleted.
Link: http://lkml.kernel.org/r/156095689811.28024.221706761151739433.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index d84e09abb8de..84925b5b6db5 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -284,13 +284,42 @@ static bool trace_uprobe_is_busy(struct dyn_event *ev) return trace_probe_is_enabled(&tu->tp); } +static bool trace_uprobe_match_command_head(struct trace_uprobe *tu, + int argc, const char **argv) +{ + char buf[MAX_ARGSTR_LEN + 1]; + int len; + + if (!argc) + return true; + + len = strlen(tu->filename); + if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':') + return false; + + if (tu->ref_ctr_offset == 0) + snprintf(buf, sizeof(buf), "0x%0*lx", + (int)(sizeof(void *) * 2), tu->offset); + else + snprintf(buf, sizeof(buf), "0x%0*lx(0x%lx)", + (int)(sizeof(void *) * 2), tu->offset, + tu->ref_ctr_offset); + if (strcmp(buf, &argv[0][len + 1])) + return false; + + argc--; argv++; + + return trace_probe_match_command_args(&tu->tp, argc, argv); +} + static bool trace_uprobe_match(const char *system, const char *event, int argc, const char **argv, struct dyn_event *ev) { struct trace_uprobe *tu = to_trace_uprobe(ev); return strcmp(trace_probe_name(&tu->tp), event) == 0 && - (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0); + (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) && + trace_uprobe_match_command_head(tu, argc, argv); } static nokprobe_inline struct trace_uprobe * |