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authorArnaldo Carvalho de Melo <acme@redhat.com>2019-10-09 16:06:43 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-10-09 16:06:43 -0300
commit3f41b77843b338e836f52cc2d486be689d6cb9c1 (patch)
tree70d92f6447e510f2cc342205d46caea91376adf8 /tools/perf/builtin-trace.c
parentd4097f1937f2242d0aa0a7c654d2159a6895e5c8 (diff)
perf trace: Add a strtoul() method to 'struct syscall_arg_fmt'
This will go from a string to a number, so that filter expressions can be constructed with strings and then, before applying the tracepoint filters (or eBPF, in the future) we can map those strings to numbers. The first one will be for 'msr' tracepoint arguments, but real quickly we will be able to reuse all strarrays for that. 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-wgqq48agcgr95b8dmn6fygtr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2c1968061b4b..faa5bf4a5a3a 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -86,8 +86,12 @@
# define F_LINUX_SPECIFIC_BASE 1024
#endif
+/*
+ * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
+ */
struct syscall_arg_fmt {
size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
+ bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
void *parm;
const char *name;
@@ -1543,8 +1547,10 @@ syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field
} else {
struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
- if (fmt)
+ if (fmt) {
arg->scnprintf = fmt->scnprintf;
+ arg->strtoul = fmt->strtoul;
+ }
}
}