kernel/trace/trace_eprobe.c:460:1: warning: stack frame size (1760) exceeds limit (1024) in '__eprobe_trace_func'
From: kernel test robot
Date: Sun Jun 18 2023 - 18:24:03 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8c1f0c38b31025f60437215dd27fffc293565fa4
commit: 672a2bf84061f0f19acfc5869f5b3689759a55a8 kernel/trace: Provide default impelentations defined in trace_probe_tmpl.h
date: 4 months ago
config: riscv-randconfig-r011-20230619 (https://download.01.org/0day-ci/archive/20230619/202306190644.qKs8k0ng-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230619/202306190644.qKs8k0ng-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306190644.qKs8k0ng-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
kernel/trace/trace_eprobe.c:428:1: warning: stack frame size (1424) exceeds limit (1024) in 'process_fetch_insn' [-Wframe-larger-than]
428 | process_fetch_insn(struct fetch_insn *code, void *rec, void *dest,
| ^
>> kernel/trace/trace_eprobe.c:460:1: warning: stack frame size (1760) exceeds limit (1024) in '__eprobe_trace_func' [-Wframe-larger-than]
460 | __eprobe_trace_func(struct eprobe_data *edata, void *rec)
| ^
2 warnings generated.
vim +/__eprobe_trace_func +460 kernel/trace/trace_eprobe.c
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 457)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 458) /* eprobe handler */
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 459) static inline void
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 @460) __eprobe_trace_func(struct eprobe_data *edata, void *rec)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 461) {
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 462) struct eprobe_trace_entry_head *entry;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 463) struct trace_event_call *call = trace_probe_event_call(&edata->ep->tp);
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 464) struct trace_event_buffer fbuffer;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 465) int dsize;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 466)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 467) if (WARN_ON_ONCE(call != edata->file->event_call))
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 468) return;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 469)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 470) if (trace_trigger_soft_disabled(edata->file))
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 471) return;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 472)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 473) dsize = get_eprobe_size(&edata->ep->tp, rec);
3e8b1a29a0e8d3 Steven Rostedt (VMware 2021-11-29 474)
3e8b1a29a0e8d3 Steven Rostedt (VMware 2021-11-29 475) entry = trace_event_buffer_reserve(&fbuffer, edata->file,
3e8b1a29a0e8d3 Steven Rostedt (VMware 2021-11-29 476) sizeof(*entry) + edata->ep->tp.size + dsize);
3e8b1a29a0e8d3 Steven Rostedt (VMware 2021-11-29 477)
3e8b1a29a0e8d3 Steven Rostedt (VMware 2021-11-29 478) if (!entry)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 479) return;
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 480)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 481) entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 482) store_trace_args(&entry[1], &edata->ep->tp, rec, sizeof(*entry), dsize);
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 483)
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 484) trace_event_buffer_commit(&fbuffer);
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 485) }
7491e2c442781a Tzvetomir Stoyanov (VMware 2021-08-19 486)
:::::: The code at line 460 was first introduced by commit
:::::: 7491e2c442781a1860181adb5ab472a52075f393 tracing: Add a probe that attaches to trace events
:::::: TO: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
:::::: CC: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
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