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perf trace: Introduce a strtoul() method for 'struct strarrays'

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And also for 'struct strarray', since its needed to implement
strarrays__strtoul(). This just traverses the entries and when finding a
match, returns (offset + index), i.e. the value associated with the
searched string.

E.g. "EFER" (MSR_EFER) returns:

  # grep -w EFER -B2 /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c
  #define x86_64_specific_MSRs_offset 0xc0000080
  static const char *x86_64_specific_MSRs[] = {
	[0xc0000080 - x86_64_specific_MSRs_offset] = "EFER",
  #

  0xc0000080

This will be auto-attached to 'struct syscall_arg_fmt' entries
associated with strarrays as soon as we add a ->strarray and ->strarrays
to 'struct syscall_arg_fmt'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-r2hpaahf8lishyb1owko9vs1@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-10-09 16:11:36 -03:00
parent 3f41b77843
commit d0a3a10410
2 changed files with 33 additions and 0 deletions
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28
tools/perf/builtin-trace.c
View File

@ -477,6 +477,34 @@ size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const
return printed;
}
bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
{
int i;
for (i = 0; i < sa->nr_entries; ++i) {
if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
*ret = sa->offset + i;
return true;
}
}
return false;
}
bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
{
int i;
for (i = 0; i < sas->nr_entries; ++i) {
struct strarray *sa = sas->entries[i];
if (strarray__strtoul(sa, bf, size, ret))
return true;
}
return false;
}
size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
struct syscall_arg *arg)
{

5
tools/perf/trace/beauty/beauty.h
View File

@ -5,6 +5,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <sys/types.h>
#include <stdbool.h>
struct strarray {
u64 offset;
@ -29,6 +30,8 @@ struct strarray {
size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val);
size_t strarray__scnprintf_flags(struct strarray *sa, char *bf, size_t size, bool show_prefix, unsigned long flags);
bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret);
struct trace;
struct thread;
@ -51,6 +54,8 @@ struct strarrays {
size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val);
bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret);
size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size);
extern struct strarray strarray__socket_families;