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-rw-r--r--tools/perf/util/machine.c6
-rw-r--r--tools/perf/util/scripting-engines/trace-event-perl.c2
-rw-r--r--tools/perf/util/util.c2
-rw-r--r--tools/perf/util/util.h1
4 files changed, 7 insertions, 4 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 656c1d7ee7d4..2cb95bbf9ea6 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1764,7 +1764,7 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
*/
int mix_chain_nr = i + 1 + lbr_nr + 1;
- if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) {
+ if (mix_chain_nr > (int)sysctl_perf_event_max_stack + PERF_MAX_BRANCH_DEPTH) {
pr_warning("corrupted callchain. skipping...\n");
return 0;
}
@@ -1825,7 +1825,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
* Based on DWARF debug information, some architectures skip
* a callchain entry saved by the kernel.
*/
- if (chain->nr < PERF_MAX_STACK_DEPTH)
+ if (chain->nr < sysctl_perf_event_max_stack)
skip_idx = arch_skip_callchain_idx(thread, chain);
/*
@@ -1886,7 +1886,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
}
check_calls:
- if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) {
+ if (chain->nr > sysctl_perf_event_max_stack && (int)chain->nr > max_stack) {
pr_warning("corrupted callchain. skipping...\n");
return 0;
}
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index ae1cebc307c5..62c7f6988e0e 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -265,7 +265,7 @@ static SV *perl_process_callchain(struct perf_sample *sample,
if (thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
sample, NULL, NULL,
- PERF_MAX_STACK_DEPTH) != 0) {
+ sysctl_perf_event_max_stack) != 0) {
pr_err("Failed to resolve callchain. Skipping\n");
goto exit;
}
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9473d46c00bb..619ba2061b62 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -33,6 +33,8 @@ struct callchain_param callchain_param = {
unsigned int page_size;
int cacheline_size;
+unsigned int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH;
+
bool test_attr__enabled;
bool perf_host = true;
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 26a924651e7b..88f607af1f47 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -267,6 +267,7 @@ void sighandler_dump_stack(int sig);
extern unsigned int page_size;
extern int cacheline_size;
+extern unsigned int sysctl_perf_event_max_stack;
struct parse_tag {
char tag;