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tools/rtla: fix collision with glibc sched_attr/sched_set_attr

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glibc commit 21571ca0d703 ("Linux: Add the sched_setattr
and sched_getattr functions") now also provides 'struct sched_attr'
and sched_setattr() which collide with the ones from rtla.

  In file included from src/trace.c:11:
  src/utils.h:49:8: error: redefinition of ‘struct sched_attr’
     49 | struct sched_attr {
        |        ^~~~~~~~~~
  In file included from /usr/include/bits/sched.h:60,
                   from /usr/include/sched.h:43,
                   from /usr/include/tracefs/tracefs.h:10,
                   from src/trace.c:4:
  /usr/include/linux/sched/types.h:98:8: note: originally defined here
     98 | struct sched_attr {
        |        ^~~~~~~~~~

Define 'struct sched_attr' conditionally, similar to what strace did:
  https://lore.kernel.org/all/20240930222913.3981407-1-raj.khem@gmail.com/
and rename rtla's version of sched_setattr() to avoid collision.

Link: https://lore.kernel.org/8088f66a7a57c1b209cd8ae0ae7c336a7f8c930d.1728572865.git.jstancek@redhat.com
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Jan Stancek 2024-10-10 17:09:48 +02:00 • committed by Steven Rostedt (Google)
parent 099a84019b
commit 0eecee3406
2 changed files with 4 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
tools/tracing/rtla/src/utils.c
View file

@ -229,7 +229,7 @@ long parse_ns_duration(char *val)
#define SCHED_DEADLINE 6
static inline int sched_setattr(pid_t pid, const struct sched_attr *attr,
static inline int syscall_sched_setattr(pid_t pid, const struct sched_attr *attr,
unsigned int flags) {
return syscall(__NR_sched_setattr, pid, attr, flags);
}
@ -239,7 +239,7 @@ int __set_sched_attr(int pid, struct sched_attr *attr)
int flags = 0;
int retval;
retval = sched_setattr(pid, attr, flags);
retval = syscall_sched_setattr(pid, attr, flags);
if (retval < 0) {
err_msg("Failed to set sched attributes to the pid %d: %s\n",
pid, strerror(errno));

2
tools/tracing/rtla/src/utils.h
View file

@ -46,6 +46,7 @@ update_sum(unsigned long long *a, unsigned long long *b)
*a += *b;
}
#ifndef SCHED_ATTR_SIZE_VER0
struct sched_attr {
uint32_t size;
uint32_t sched_policy;
@ -56,6 +57,7 @@ struct sched_attr {
uint64_t sched_deadline;
uint64_t sched_period;
};
#endif /* SCHED_ATTR_SIZE_VER0 */
int parse_prio(char *arg, struct sched_attr *sched_param);
int parse_cpu_set(char *cpu_list, cpu_set_t *set);