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authorMasami Hiramatsu <mhiramat@kernel.org>2019-06-20 00:08:18 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-08-31 12:19:39 -0400
commitab10d69eb714961d1eca4129e4f8cda5e0618f66 (patch)
treea1706af78fe43a9a4b7bee56152fc673734def0a /kernel/trace
parenteb5bf81330a722d0079d28eed13d3a9355d938bf (diff)
downloadlinux-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.c31
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 *