diff mbox series

[v2,1/4] tracing: Update function trace addresses with module addresses

Message ID 20250325213919.460188156@goodmis.org (mailing list archive)
State Under Review
Commit 3262f698d9974c0c8df1f8b7f6bba2a42a77ab5c
Headers show
Series tracing: Have function tracing and events handle module addresses | expand

Commit Message

Steven Rostedt March 25, 2025, 9:38 p.m. UTC 
From: Steven Rostedt <rostedt@goodmis.org>

Now that module addresses are saved in the persistent ring buffer, their
addresses can be used to adjust the address in the persistent ring buffer
to the address of the module that is currently loaded.

Instead of blindly using the text_delta that only works for core kernel
code, call the trace_adjust_address() that will see if the address matches
an address saved in the persistent ring buffer, and then uses that against
the matching module if it is loaded.

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 kernel/trace/trace_output.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 1ad54fcf25cb..ca8e09436a0a 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -1006,10 +1006,10 @@  enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
 }
 
 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
-			   unsigned long parent_ip, long delta, int flags)
+			   unsigned long parent_ip, struct trace_array *tr, int flags)
 {
-	ip += delta;
-	parent_ip += delta;
+	ip = trace_adjust_address(tr, ip);
+	parent_ip = trace_adjust_address(tr, parent_ip);
 
 	seq_print_ip_sym(s, ip, flags);
 
@@ -1028,7 +1028,7 @@  static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
 
 	trace_assign_type(field, iter->ent);
 
-	print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
+	print_fn_trace(s, field->ip, field->parent_ip, iter->tr, flags);
 	trace_seq_putc(s, '\n');
 
 	return trace_handle_return(s);
@@ -1614,7 +1614,7 @@  static enum print_line_t trace_print_print(struct trace_iterator *iter,
 
 	trace_assign_type(field, iter->ent);
 
-	ip = field->ip + iter->tr->text_delta;
+	ip = trace_adjust_address(iter->tr, field->ip);
 
 	seq_print_ip_sym(s, ip, flags);
 	trace_seq_printf(s, ": %s", field->buf);
@@ -1700,7 +1700,7 @@  trace_func_repeats_print(struct trace_iterator *iter, int flags,
 
 	trace_assign_type(field, iter->ent);
 
-	print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
+	print_fn_trace(s, field->ip, field->parent_ip, iter->tr, flags);
 	trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
 	trace_print_time(s, iter,
 			 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));