perf dlfilter: Add resolve_address() to perf_dlfilter_fns

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>

diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt
index 5795ab3..642323a 100644 (file)
--- a/tools/perf/Documentation/perf-dlfilter.txt
+++ b/tools/perf/Documentation/perf-dlfilter.txt
@@ -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
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

diff --git a/tools/perf/util/dlfilter.c b/tools/perf/util/dlfilter.c
index eaa3cea..4b03227 100644 (file)
--- a/tools/perf/util/dlfilter.c
+++ b/tools/perf/util/dlfilter.c
@@ -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)

diff --git a/tools/perf/util/perf_dlfilter.h b/tools/perf/util/perf_dlfilter.h
index 35e03aa..dfd0f84 100644 (file)
--- a/tools/perf/util/perf_dlfilter.h
+++ b/tools/perf/util/perf_dlfilter.h
@@ -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 *);
 };
 
 /*