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perf dlfilter: Add resolve_address() to perf_dlfilter_fns

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Add a function, for use by dlfilters, to resolve addresses from branch
stacks or callchains.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-06-27 16:18:14 +03:00 committed by Arnaldo Carvalho de Melo
parent 0beb218315
commit f645744c50
3 changed files with 40 additions and 2 deletions
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6
tools/perf/Documentation/perf-dlfilter.txt
View File

@ -123,7 +123,8 @@ struct perf_dlfilter_fns {
const struct perf_dlfilter_al *(*resolve_ip)(void *ctx);
const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
char **(*args)(void *ctx, int *dlargc);
void *(*reserved[125])(void *);
__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
void *(*reserved[124])(void *);
};
----
@ -133,6 +134,9 @@ struct perf_dlfilter_fns {
'args' returns arguments from --dlarg options.
'resolve_address' provides information about 'address'. al->size must be set
before calling. Returns 0 on success, -1 otherwise.
The perf_dlfilter_al structure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

29
tools/perf/util/dlfilter.c
View File

@ -149,10 +149,39 @@ static char **dlfilter__args(void *ctx, int *dlargc)
return d->dlargv;
}
static __s32 dlfilter__resolve_address(void *ctx, __u64 address, struct perf_dlfilter_al *d_al_p)
{
struct dlfilter *d = (struct dlfilter *)ctx;
struct perf_dlfilter_al d_al;
struct addr_location al;
struct thread *thread;
__u32 sz;
if (!d->ctx_valid || !d_al_p)
return -1;
thread = get_thread(d);
if (!thread)
return -1;
thread__find_symbol_fb(thread, d->sample->cpumode, address, &al);
al_to_d_al(&al, &d_al);
d_al.is_kernel_ip = machine__kernel_ip(d->machine, address);
sz = d_al_p->size;
memcpy(d_al_p, &d_al, min((size_t)sz, sizeof(d_al)));
d_al_p->size = sz;
return 0;
}
static const struct perf_dlfilter_fns perf_dlfilter_fns = {
.resolve_ip = dlfilter__resolve_ip,
.resolve_addr = dlfilter__resolve_addr,
.args = dlfilter__args,
.resolve_address = dlfilter__resolve_address,
};
static char *find_dlfilter(const char *file)

7
tools/perf/util/perf_dlfilter.h
View File

@ -92,8 +92,13 @@ struct perf_dlfilter_fns {
const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
/* Return arguments from --dlarg option */
char **(*args)(void *ctx, int *dlargc);
/*
* Return information about address (al->size must be set before
* calling). Returns 0 on success, -1 otherwise.
*/
__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
/* Reserved */
void *(*reserved[125])(void *);
void *(*reserved[124])(void *);
};
/*