Merge tag 'perf-urgent-2020-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A set of fixes and improvements for the perf subsystem:
Kernel fixes:
- Install cgroup events to the correct CPU context to prevent a
potential list double add
- Prevent an integer underflow in the perf mlock accounting
- Add a missing prototype for arch_perf_update_userpage()
Tooling:
- Add a missing unlock in the error path of maps__insert() in perf
maps.
- Fix the build with the latest libbfd
- Fix the perf parser so it does not delete parse event terms, which
caused a regression for using perf with the ARM CoreSight as the
sink configuration was missing due to the deletion.
- Fix the double free in the perf CPU map merging test case
- Add the missing ustring support for the perf probe command"
* tag 'perf-urgent-2020-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf maps: Add missing unlock to maps__insert() error case
perf probe: Add ustring support for perf probe command
perf: Make perf able to build with latest libbfd
perf test: Fix test case Merge cpu map
perf parse: Copy string to perf_evsel_config_term
perf parse: Refactor 'struct perf_evsel_config_term'
kernel/events: Add a missing prototype for arch_perf_update_userpage()
perf/cgroups: Install cgroup events to correct cpuctx
perf/core: Fix mlock accounting in perf_mmap()
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index cf65763..547773f 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1544,4 +1544,8 @@
#define perf_event_exit_cpu NULL
#endif
+extern void __weak arch_perf_update_userpage(struct perf_event *event,
+ struct perf_event_mmap_page *userpg,
+ u64 now);
+
#endif /* _LINUX_PERF_EVENT_H */
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 17f9a4a..e453589 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -951,9 +951,9 @@
/*
* Because cgroup events are always per-cpu events,
- * this will always be called from the right CPU.
+ * @ctx == &cpuctx->ctx.
*/
- cpuctx = __get_cpu_context(ctx);
+ cpuctx = container_of(ctx, struct perf_cpu_context, ctx);
/*
* Since setting cpuctx->cgrp is conditional on the current @cgrp
@@ -979,7 +979,8 @@
cpuctx_entry = &cpuctx->cgrp_cpuctx_entry;
if (add)
- list_add(cpuctx_entry, this_cpu_ptr(&cgrp_cpuctx_list));
+ list_add(cpuctx_entry,
+ per_cpu_ptr(&cgrp_cpuctx_list, event->cpu));
else
list_del(cpuctx_entry);
}
@@ -5916,7 +5917,15 @@
*/
user_lock_limit *= num_online_cpus();
- user_locked = atomic_long_read(&user->locked_vm) + user_extra;
+ user_locked = atomic_long_read(&user->locked_vm);
+
+ /*
+ * sysctl_perf_event_mlock may have changed, so that
+ * user->locked_vm > user_lock_limit
+ */
+ if (user_locked > user_lock_limit)
+ user_locked = user_lock_limit;
+ user_locked += user_extra;
if (user_locked > user_lock_limit) {
/*
diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index ede040c..2898cfd 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -226,7 +226,7 @@
if (term->type != PERF_EVSEL__CONFIG_TERM_DRV_CFG)
continue;
- sink = term->val.drv_cfg;
+ sink = term->val.str;
snprintf(path, PATH_MAX, "sinks/%s", sink);
ret = perf_pmu__scan_file(pmu, path, "%x", &hash);
diff --git a/tools/perf/tests/cpumap.c b/tools/perf/tests/cpumap.c
index 4ac5674..29c793a 100644
--- a/tools/perf/tests/cpumap.c
+++ b/tools/perf/tests/cpumap.c
@@ -131,7 +131,6 @@
TEST_ASSERT_VAL("failed to merge map: bad nr", c->nr == 5);
cpu_map__snprint(c, buf, sizeof(buf));
TEST_ASSERT_VAL("failed to merge map: bad result", !strcmp(buf, "1-2,4-5,7"));
- perf_cpu_map__put(a);
perf_cpu_map__put(b);
perf_cpu_map__put(c);
return 0;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a69e642..c8dc445 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -808,12 +808,12 @@
perf_evsel__reset_sample_bit(evsel, TIME);
break;
case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
- callgraph_buf = term->val.callgraph;
+ callgraph_buf = term->val.str;
break;
case PERF_EVSEL__CONFIG_TERM_BRANCH:
- if (term->val.branch && strcmp(term->val.branch, "no")) {
+ if (term->val.str && strcmp(term->val.str, "no")) {
perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
- parse_branch_str(term->val.branch,
+ parse_branch_str(term->val.str,
&attr->branch_sample_type);
} else
perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
@@ -1265,6 +1265,8 @@
list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
list_del_init(&term->list);
+ if (term->free_str)
+ zfree(&term->val.str);
free(term);
}
}
diff --git a/tools/perf/util/evsel_config.h b/tools/perf/util/evsel_config.h
index 1f8d2fe..e026ab6 100644
--- a/tools/perf/util/evsel_config.h
+++ b/tools/perf/util/evsel_config.h
@@ -32,22 +32,21 @@
struct perf_evsel_config_term {
struct list_head list;
enum evsel_term_type type;
+ bool free_str;
union {
u64 period;
u64 freq;
bool time;
- char *callgraph;
- char *drv_cfg;
u64 stack_user;
int max_stack;
bool inherit;
bool overwrite;
- char *branch;
unsigned long max_events;
bool percore;
bool aux_output;
u32 aux_sample_size;
u64 cfg_chg;
+ char *str;
} val;
bool weak;
};
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index fdd5bdd..f67960b 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -549,6 +549,7 @@
if (maps_by_name == NULL) {
__maps__free_maps_by_name(maps);
+ up_write(&maps->lock);
return;
}
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ed7c008..c01ba6f 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1219,8 +1219,7 @@
static int get_config_terms(struct list_head *head_config,
struct list_head *head_terms __maybe_unused)
{
-#define ADD_CONFIG_TERM(__type, __name, __val) \
-do { \
+#define ADD_CONFIG_TERM(__type) \
struct perf_evsel_config_term *__t; \
\
__t = zalloc(sizeof(*__t)); \
@@ -1229,9 +1228,24 @@
\
INIT_LIST_HEAD(&__t->list); \
__t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
- __t->val.__name = __val; \
__t->weak = term->weak; \
- list_add_tail(&__t->list, head_terms); \
+ list_add_tail(&__t->list, head_terms)
+
+#define ADD_CONFIG_TERM_VAL(__type, __name, __val) \
+do { \
+ ADD_CONFIG_TERM(__type); \
+ __t->val.__name = __val; \
+} while (0)
+
+#define ADD_CONFIG_TERM_STR(__type, __val) \
+do { \
+ ADD_CONFIG_TERM(__type); \
+ __t->val.str = strdup(__val); \
+ if (!__t->val.str) { \
+ zfree(&__t); \
+ return -ENOMEM; \
+ } \
+ __t->free_str = true; \
} while (0)
struct parse_events_term *term;
@@ -1239,53 +1253,62 @@
list_for_each_entry(term, head_config, list) {
switch (term->type_term) {
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
- ADD_CONFIG_TERM(PERIOD, period, term->val.num);
+ ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
- ADD_CONFIG_TERM(FREQ, freq, term->val.num);
+ ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_TIME:
- ADD_CONFIG_TERM(TIME, time, term->val.num);
+ ADD_CONFIG_TERM_VAL(TIME, time, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
- ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
+ ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
- ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
+ ADD_CONFIG_TERM_STR(BRANCH, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
- ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
+ ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
+ term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_INHERIT:
- ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(INHERIT, inherit,
+ term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
- ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
+ ADD_CONFIG_TERM_VAL(INHERIT, inherit,
+ term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
- ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
+ ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
+ term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
- ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
+ ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
+ term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
- ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
+ term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
- ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
+ ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
+ term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
- ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
+ ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_PERCORE:
- ADD_CONFIG_TERM(PERCORE, percore,
- term->val.num ? true : false);
+ ADD_CONFIG_TERM_VAL(PERCORE, percore,
+ term->val.num ? true : false);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
- ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
+ term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
- ADD_CONFIG_TERM(AUX_SAMPLE_SIZE, aux_sample_size, term->val.num);
+ ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
+ term->val.num);
break;
default:
break;
@@ -1322,7 +1345,7 @@
}
if (bits)
- ADD_CONFIG_TERM(CFG_CHG, cfg_chg, bits);
+ ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits);
#undef ADD_CONFIG_TERM
return 0;
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index c470c49..1c817ad 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -303,7 +303,8 @@
char prefix;
/* TODO: check all types */
- if (cast && strcmp(cast, "string") != 0 && strcmp(cast, "x") != 0 &&
+ if (cast && strcmp(cast, "string") != 0 && strcmp(cast, "ustring") &&
+ strcmp(cast, "x") != 0 &&
strcmp(cast, "s") != 0 && strcmp(cast, "u") != 0) {
/* Non string type is OK */
/* and respect signedness/hexadecimal cast */
diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 6ccf6f6..5b7d6c1 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -193,16 +193,30 @@
bfd_vma pc, vma;
bfd_size_type size;
struct a2l_data *a2l = data;
+ flagword flags;
if (a2l->found)
return;
- if ((bfd_get_section_flags(abfd, section) & SEC_ALLOC) == 0)
+#ifdef bfd_get_section_flags
+ flags = bfd_get_section_flags(abfd, section);
+#else
+ flags = bfd_section_flags(section);
+#endif
+ if ((flags & SEC_ALLOC) == 0)
return;
pc = a2l->addr;
+#ifdef bfd_get_section_vma
vma = bfd_get_section_vma(abfd, section);
+#else
+ vma = bfd_section_vma(section);
+#endif
+#ifdef bfd_get_section_size
size = bfd_get_section_size(section);
+#else
+ size = bfd_section_size(section);
+#endif
if (pc < vma || pc >= vma + size)
return;
