* [linux-next:master 690/8423] kernel/trace/trace_events_hist.c:4594:13: warning: stack frame size (1280) exceeds limit (1024) in function 'hist_trigger_print_key'
@ 2021-08-16 11:44 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-08-16 11:44 UTC (permalink / raw)
To: Miguel Ojeda
Cc: clang-built-linux, kbuild-all, Linux Memory Management List,
Alex Gaynor, Geoffrey Thomas, Finn Behrens, Adam Bratschi-Kaye,
Wedson Almeida Filho
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: b9011c7e671dbbf59bb753283ddfd03f0c9eb865
commit: f2f6175186f4ccd33a710f4cd557676a5cc60153 [690/8423] kallsyms: increase maximum kernel symbol length to 512
config: arm-randconfig-r034-20210816 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=f2f6175186f4ccd33a710f4cd557676a5cc60153
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout f2f6175186f4ccd33a710f4cd557676a5cc60153
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
kernel/trace/trace_events_hist.c:5228:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
>> kernel/trace/trace_events_hist.c:4594:13: warning: stack frame size (1280) exceeds limit (1024) in function 'hist_trigger_print_key' [-Wframe-larger-than]
static void hist_trigger_print_key(struct seq_file *m,
^
2 warnings generated.
vim +/hist_trigger_print_key +4594 kernel/trace/trace_events_hist.c
69a0200c2e25d6 Tom Zanussi 2016-03-03 4593
a3785b7eca8fd4 Tom Zanussi 2019-02-13 @4594 static void hist_trigger_print_key(struct seq_file *m,
a3785b7eca8fd4 Tom Zanussi 2019-02-13 4595 struct hist_trigger_data *hist_data,
a3785b7eca8fd4 Tom Zanussi 2019-02-13 4596 void *key,
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4597 struct tracing_map_elt *elt)
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4598 {
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4599 struct hist_field *key_field;
c6afad49d127f6 Tom Zanussi 2016-03-03 4600 char str[KSYM_SYMBOL_LEN];
69a0200c2e25d6 Tom Zanussi 2016-03-03 4601 bool multiline = false;
85013256cf0162 Tom Zanussi 2017-09-22 4602 const char *field_name;
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4603 unsigned int i;
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4604 u64 uval;
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4605
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4606 seq_puts(m, "{ ");
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4607
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4608 for_each_hist_key_field(i, hist_data) {
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4609 key_field = hist_data->fields[i];
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4610
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4611 if (i > hist_data->n_vals)
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4612 seq_puts(m, ", ");
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4613
85013256cf0162 Tom Zanussi 2017-09-22 4614 field_name = hist_field_name(key_field, 0);
85013256cf0162 Tom Zanussi 2017-09-22 4615
0c4a6b4666e8eb Tom Zanussi 2016-03-03 4616 if (key_field->flags & HIST_FIELD_FL_HEX) {
0c4a6b4666e8eb Tom Zanussi 2016-03-03 4617 uval = *(u64 *)(key + key_field->offset);
85013256cf0162 Tom Zanussi 2017-09-22 4618 seq_printf(m, "%s: %llx", field_name, uval);
c6afad49d127f6 Tom Zanussi 2016-03-03 4619 } else if (key_field->flags & HIST_FIELD_FL_SYM) {
c6afad49d127f6 Tom Zanussi 2016-03-03 4620 uval = *(u64 *)(key + key_field->offset);
c6afad49d127f6 Tom Zanussi 2016-03-03 4621 sprint_symbol_no_offset(str, uval);
85013256cf0162 Tom Zanussi 2017-09-22 4622 seq_printf(m, "%s: [%llx] %-45s", field_name,
85013256cf0162 Tom Zanussi 2017-09-22 4623 uval, str);
c6afad49d127f6 Tom Zanussi 2016-03-03 4624 } else if (key_field->flags & HIST_FIELD_FL_SYM_OFFSET) {
c6afad49d127f6 Tom Zanussi 2016-03-03 4625 uval = *(u64 *)(key + key_field->offset);
c6afad49d127f6 Tom Zanussi 2016-03-03 4626 sprint_symbol(str, uval);
85013256cf0162 Tom Zanussi 2017-09-22 4627 seq_printf(m, "%s: [%llx] %-55s", field_name,
85013256cf0162 Tom Zanussi 2017-09-22 4628 uval, str);
6b4827ad028a1a Tom Zanussi 2016-03-03 4629 } else if (key_field->flags & HIST_FIELD_FL_EXECNAME) {
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4630 struct hist_elt_data *elt_data = elt->private_data;
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4631 char *comm;
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4632
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4633 if (WARN_ON_ONCE(!elt_data))
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4634 return;
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4635
af6a29bcaf8ff2 Tom Zanussi 2018-01-15 4636 comm = elt_data->comm;
6b4827ad028a1a Tom Zanussi 2016-03-03 4637
6b4827ad028a1a Tom Zanussi 2016-03-03 4638 uval = *(u64 *)(key + key_field->offset);
85013256cf0162 Tom Zanussi 2017-09-22 4639 seq_printf(m, "%s: %-16s[%10llu]", field_name,
85013256cf0162 Tom Zanussi 2017-09-22 4640 comm, uval);
316961988b5ec7 Tom Zanussi 2016-03-03 4641 } else if (key_field->flags & HIST_FIELD_FL_SYSCALL) {
316961988b5ec7 Tom Zanussi 2016-03-03 4642 const char *syscall_name;
316961988b5ec7 Tom Zanussi 2016-03-03 4643
316961988b5ec7 Tom Zanussi 2016-03-03 4644 uval = *(u64 *)(key + key_field->offset);
316961988b5ec7 Tom Zanussi 2016-03-03 4645 syscall_name = get_syscall_name(uval);
316961988b5ec7 Tom Zanussi 2016-03-03 4646 if (!syscall_name)
316961988b5ec7 Tom Zanussi 2016-03-03 4647 syscall_name = "unknown_syscall";
316961988b5ec7 Tom Zanussi 2016-03-03 4648
85013256cf0162 Tom Zanussi 2017-09-22 4649 seq_printf(m, "%s: %-30s[%3llu]", field_name,
85013256cf0162 Tom Zanussi 2017-09-22 4650 syscall_name, uval);
69a0200c2e25d6 Tom Zanussi 2016-03-03 4651 } else if (key_field->flags & HIST_FIELD_FL_STACKTRACE) {
69a0200c2e25d6 Tom Zanussi 2016-03-03 4652 seq_puts(m, "stacktrace:\n");
69a0200c2e25d6 Tom Zanussi 2016-03-03 4653 hist_trigger_stacktrace_print(m,
69a0200c2e25d6 Tom Zanussi 2016-03-03 4654 key + key_field->offset,
69a0200c2e25d6 Tom Zanussi 2016-03-03 4655 HIST_STACKTRACE_DEPTH);
69a0200c2e25d6 Tom Zanussi 2016-03-03 4656 multiline = true;
4b94f5b7b4a5ff Namhyung Kim 2016-03-03 4657 } else if (key_field->flags & HIST_FIELD_FL_LOG2) {
85013256cf0162 Tom Zanussi 2017-09-22 4658 seq_printf(m, "%s: ~ 2^%-2llu", field_name,
4b94f5b7b4a5ff Namhyung Kim 2016-03-03 4659 *(u64 *)(key + key_field->offset));
0c4a6b4666e8eb Tom Zanussi 2016-03-03 4660 } else if (key_field->flags & HIST_FIELD_FL_STRING) {
85013256cf0162 Tom Zanussi 2017-09-22 4661 seq_printf(m, "%s: %-50s", field_name,
76a3b0c8ac344e Tom Zanussi 2016-03-03 4662 (char *)(key + key_field->offset));
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4663 } else {
76a3b0c8ac344e Tom Zanussi 2016-03-03 4664 uval = *(u64 *)(key + key_field->offset);
85013256cf0162 Tom Zanussi 2017-09-22 4665 seq_printf(m, "%s: %10llu", field_name, uval);
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4666 }
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4667 }
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4668
69a0200c2e25d6 Tom Zanussi 2016-03-03 4669 if (!multiline)
69a0200c2e25d6 Tom Zanussi 2016-03-03 4670 seq_puts(m, " ");
69a0200c2e25d6 Tom Zanussi 2016-03-03 4671
7ef224d1d0e3a1 Tom Zanussi 2016-03-03 4672 seq_puts(m, "}");
a3785b7eca8fd4 Tom Zanussi 2019-02-13 4673 }
a3785b7eca8fd4 Tom Zanussi 2019-02-13 4674
:::::: The code at line 4594 was first introduced by commit
:::::: a3785b7eca8fd45c7c39f2ddfcd67368af30c1b4 tracing: Add hist trigger snapshot() action
:::::: TO: Tom Zanussi <tom.zanussi@linux.intel.com>
:::::: CC: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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2021-08-16 11:44 [linux-next:master 690/8423] kernel/trace/trace_events_hist.c:4594:13: warning: stack frame size (1280) exceeds limit (1024) in function 'hist_trigger_print_key' kernel test robot
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