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| author | Tatsuya S <tatsuya.s2862@gmail.com> | 2024-10-21 07:14:53 +0000 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-11-18 15:08:10 -0500 |
| commit | 6ce5a6f0a07d37cc377df08a8d8a9c283420f323 (patch) | |
| tree | 57c956d0b1fe16460edb231027ffdeb7384a0572 /kernel/trace/trace_output.c | |
| parent | ftrace: Get the true parent ip for function tracer (diff) | |
| download | linux-6ce5a6f0a07d37cc377df08a8d8a9c283420f323.tar.gz linux-6ce5a6f0a07d37cc377df08a8d8a9c283420f323.zip | |
tracing: Fix function name for trampoline
The issue that unrelated function name is shown on stack trace like
following even though it should be trampoline code address is caused by
the creation of trampoline code in the area where .init.text section
of module was freed after module is loaded.
bash-1344 [002] ..... 43.644608: <stack trace>
=> (MODULE INIT FUNCTION)
=> vfs_write
=> ksys_write
=> do_syscall_64
=> entry_SYSCALL_64_after_hwframe
To resolve this, when function address of stack trace entry is in
trampoline, output without looking up symbol name.
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20241021071454.34610-2-tatsuya.s2862@gmail.com
Signed-off-by: Tatsuya S <tatsuya.s2862@gmail.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.c')
| -rw-r--r-- | kernel/trace/trace_output.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index 2ee6613dce6d..e08aee34ef63 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -1245,6 +1245,10 @@ static enum print_line_t trace_stack_print(struct trace_iterator *iter, break; trace_seq_puts(s, " => "); + if ((*p) == FTRACE_TRAMPOLINE_MARKER) { + trace_seq_puts(s, "[FTRACE TRAMPOLINE]\n"); + continue; + } seq_print_ip_sym(s, (*p) + delta, flags); trace_seq_putc(s, '\n'); } |