diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2025-02-27 13:58:06 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-03-04 11:27:23 -0500 |
| commit | ff5c9c576e754563b3be4922c3968bc3b0269541 (patch) | |
| tree | e4db7403fd922448eca4aac9011ac5779f050834 /kernel/trace/trace_entries.h | |
| parent | 533c20b062d7c25cbcbadb31e3ecb95a08ddb877 (diff) | |
| download | linux-next-ff5c9c576e754563b3be4922c3968bc3b0269541.tar.gz linux-next-ff5c9c576e754563b3be4922c3968bc3b0269541.zip | |
ftrace: Add support for function argument to graph tracer
Wire up the code to print function arguments in the function graph
tracer. This functionality can be enabled/disabled during runtime with
options/funcgraph-args.
Example usage:
6) | dummy_xmit [dummy](skb = 0x8887c100, dev = 0x872ca000) {
6) | consume_skb(skb = 0x8887c100) {
6) | skb_release_head_state(skb = 0x8887c100) {
6) 0.178 us | sock_wfree(skb = 0x8887c100)
6) 0.627 us | }
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Guo Ren <guoren@kernel.org>
Cc: Donglin Peng <dolinux.peng@gmail.com>
Cc: Zheng Yejian <zhengyejian@huaweicloud.com>
Link: https://lore.kernel.org/20250227185822.810321199@goodmis.org
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Co-developed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_entries.h')
| -rw-r--r-- | kernel/trace/trace_entries.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h index fbfb396905a6..77a8ba3bc1e3 100644 --- a/kernel/trace/trace_entries.h +++ b/kernel/trace/trace_entries.h @@ -72,17 +72,18 @@ FTRACE_ENTRY_REG(function, ftrace_entry, ); /* Function call entry */ -FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry, +FTRACE_ENTRY(funcgraph_entry, ftrace_graph_ent_entry, TRACE_GRAPH_ENT, F_STRUCT( __field_struct( struct ftrace_graph_ent, graph_ent ) __field_packed( unsigned long, graph_ent, func ) - __field_packed( int, graph_ent, depth ) + __field_packed( unsigned long, graph_ent, depth ) + __dynamic_array(unsigned long, args ) ), - F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth) + F_printk("--> %ps (%lu)", (void *)__entry->func, __entry->depth) ); #ifdef CONFIG_FUNCTION_GRAPH_RETADDR |