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-rw-r--r--tools/perf/util/annotate.c1
-rw-r--r--tools/perf/util/arm-spe.c5
-rw-r--r--tools/perf/util/arm64-frame-pointer-unwind-support.c2
-rw-r--r--tools/perf/util/bpf-event.c4
-rw-r--r--tools/perf/util/c++/clang.cpp4
-rw-r--r--tools/perf/util/header.c51
-rw-r--r--tools/perf/util/header.h1
-rw-r--r--tools/perf/util/machine.c2
-rw-r--r--tools/perf/util/parse-events.c5
-rw-r--r--tools/perf/util/session.c43
-rw-r--r--tools/perf/util/setup.py8
-rw-r--r--tools/perf/util/stat.c20
-rw-r--r--tools/perf/util/symbol-elf.c2
-rw-r--r--tools/perf/util/symbol.c37
-rw-r--r--tools/perf/util/symbol.h3
-rw-r--r--tools/perf/util/unwind-libdw.c10
-rw-r--r--tools/perf/util/unwind-libdw.h1
-rw-r--r--tools/perf/util/unwind-libunwind-local.c10
-rw-r--r--tools/perf/util/unwind-libunwind.c6
-rw-r--r--tools/perf/util/unwind.h13
20 files changed, 182 insertions, 46 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index e4c641b240df..82cc396ef516 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -2047,6 +2047,7 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
objdump_process.argv = objdump_argv;
objdump_process.out = -1;
objdump_process.err = -1;
+ objdump_process.no_stderr = 1;
if (start_command(&objdump_process)) {
pr_err("Failure starting to run %s\n", command);
err = -1;
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index d2b64e3f588b..1a80151baed9 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -1033,10 +1033,11 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session)
memset(&attr, 0, sizeof(struct perf_event_attr));
attr.size = sizeof(struct perf_event_attr);
attr.type = PERF_TYPE_HARDWARE;
- attr.sample_type = evsel->core.attr.sample_type & PERF_SAMPLE_MASK;
+ attr.sample_type = evsel->core.attr.sample_type &
+ (PERF_SAMPLE_MASK | PERF_SAMPLE_PHYS_ADDR);
attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
PERF_SAMPLE_PERIOD | PERF_SAMPLE_DATA_SRC |
- PERF_SAMPLE_WEIGHT;
+ PERF_SAMPLE_WEIGHT | PERF_SAMPLE_ADDR;
if (spe->timeless_decoding)
attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
else
diff --git a/tools/perf/util/arm64-frame-pointer-unwind-support.c b/tools/perf/util/arm64-frame-pointer-unwind-support.c
index 2242a885fbd7..4940be4a0569 100644
--- a/tools/perf/util/arm64-frame-pointer-unwind-support.c
+++ b/tools/perf/util/arm64-frame-pointer-unwind-support.c
@@ -53,7 +53,7 @@ u64 get_leaf_frame_caller_aarch64(struct perf_sample *sample, struct thread *thr
sample->user_regs.cache_regs[PERF_REG_ARM64_SP] = 0;
}
- ret = unwind__get_entries(add_entry, &entries, thread, sample, 2);
+ ret = unwind__get_entries(add_entry, &entries, thread, sample, 2, true);
sample->user_regs = old_regs;
if (ret || entries.length != 2)
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
index 94624733af7e..8271ab764eb5 100644
--- a/tools/perf/util/bpf-event.c
+++ b/tools/perf/util/bpf-event.c
@@ -22,7 +22,8 @@
#include "record.h"
#include "util/synthetic-events.h"
-struct btf * __weak btf__load_from_kernel_by_id(__u32 id)
+#ifndef HAVE_LIBBPF_BTF__LOAD_FROM_KERNEL_BY_ID
+struct btf *btf__load_from_kernel_by_id(__u32 id)
{
struct btf *btf;
#pragma GCC diagnostic push
@@ -32,6 +33,7 @@ struct btf * __weak btf__load_from_kernel_by_id(__u32 id)
return err ? ERR_PTR(err) : btf;
}
+#endif
int __weak bpf_prog_load(enum bpf_prog_type prog_type,
const char *prog_name __maybe_unused,
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index df7b18fb6b6e..1aad7d6d34aa 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -20,7 +20,11 @@
#include "llvm/Option/Option.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
+#if CLANG_VERSION_MAJOR >= 14
+#include "llvm/MC/TargetRegistry.h"
+#else
#include "llvm/Support/TargetRegistry.h"
+#endif
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d546ff724dbe..a27132e5a5ef 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -983,6 +983,57 @@ static int write_dir_format(struct feat_fd *ff,
return do_write(ff, &data->dir.version, sizeof(data->dir.version));
}
+/*
+ * Check whether a CPU is online
+ *
+ * Returns:
+ * 1 -> if CPU is online
+ * 0 -> if CPU is offline
+ * -1 -> error case
+ */
+int is_cpu_online(unsigned int cpu)
+{
+ char *str;
+ size_t strlen;
+ char buf[256];
+ int status = -1;
+ struct stat statbuf;
+
+ snprintf(buf, sizeof(buf),
+ "/sys/devices/system/cpu/cpu%d", cpu);
+ if (stat(buf, &statbuf) != 0)
+ return 0;
+
+ /*
+ * Check if /sys/devices/system/cpu/cpux/online file
+ * exists. Some cases cpu0 won't have online file since
+ * it is not expected to be turned off generally.
+ * In kernels without CONFIG_HOTPLUG_CPU, this
+ * file won't exist
+ */
+ snprintf(buf, sizeof(buf),
+ "/sys/devices/system/cpu/cpu%d/online", cpu);
+ if (stat(buf, &statbuf) != 0)
+ return 1;
+
+ /*
+ * Read online file using sysfs__read_str.
+ * If read or open fails, return -1.
+ * If read succeeds, return value from file
+ * which gets stored in "str"
+ */
+ snprintf(buf, sizeof(buf),
+ "devices/system/cpu/cpu%d/online", cpu);
+
+ if (sysfs__read_str(buf, &str, &strlen) < 0)
+ return status;
+
+ status = atoi(str);
+
+ free(str);
+ return status;
+}
+
#ifdef HAVE_LIBBPF_SUPPORT
static int write_bpf_prog_info(struct feat_fd *ff,
struct evlist *evlist __maybe_unused)
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index c9e3265832d9..0eb4bc29a5a4 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -158,6 +158,7 @@ int do_write(struct feat_fd *fd, const void *buf, size_t size);
int write_padded(struct feat_fd *fd, const void *bf,
size_t count, size_t count_aligned);
+int is_cpu_online(unsigned int cpu);
/*
* arch specific callback
*/
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index b80048546451..95391236f5f6 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2987,7 +2987,7 @@ static int thread__resolve_callchain_unwind(struct thread *thread,
return 0;
return unwind__get_entries(unwind_entry, cursor,
- thread, sample, max_stack);
+ thread, sample, max_stack, false);
}
int thread__resolve_callchain(struct thread *thread,
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 24997925ae00..dd84fed698a3 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1523,7 +1523,9 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
bool use_uncore_alias;
LIST_HEAD(config_terms);
- if (verbose > 1) {
+ pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
+
+ if (verbose > 1 && !(pmu && pmu->selectable)) {
fprintf(stderr, "Attempting to add event pmu '%s' with '",
name);
if (head_config) {
@@ -1536,7 +1538,6 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
fprintf(stderr, "' that may result in non-fatal errors\n");
}
- pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
if (!pmu) {
char *err_str;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 3b8dfe603e50..a7f93f5a1ac8 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1151,9 +1151,20 @@ static void branch_stack__printf(struct perf_sample *sample, bool callstack)
struct branch_entry *entries = perf_sample__branch_entries(sample);
uint64_t i;
- printf("%s: nr:%" PRIu64 "\n",
- !callstack ? "... branch stack" : "... branch callstack",
- sample->branch_stack->nr);
+ if (!callstack) {
+ printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
+ } else {
+ /* the reason of adding 1 to nr is because after expanding
+ * branch stack it generates nr + 1 callstack records. e.g.,
+ * B()->C()
+ * A()->B()
+ * the final callstack should be:
+ * C()
+ * B()
+ * A()
+ */
+ printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
+ }
for (i = 0; i < sample->branch_stack->nr; i++) {
struct branch_entry *e = &entries[i];
@@ -1169,8 +1180,13 @@ static void branch_stack__printf(struct perf_sample *sample, bool callstack)
(unsigned)e->flags.reserved,
e->flags.type ? branch_type_name(e->flags.type) : "");
} else {
- printf("..... %2"PRIu64": %016" PRIx64 "\n",
- i, i > 0 ? e->from : e->to);
+ if (i == 0) {
+ printf("..... %2"PRIu64": %016" PRIx64 "\n"
+ "..... %2"PRIu64": %016" PRIx64 "\n",
+ i, e->to, i+1, e->from);
+ } else {
+ printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
+ }
}
}
}
@@ -2095,6 +2111,7 @@ prefetch_event(char *buf, u64 head, size_t mmap_size,
bool needs_swap, union perf_event *error)
{
union perf_event *event;
+ u16 event_size;
/*
* Ensure we have enough space remaining to read
@@ -2107,15 +2124,23 @@ prefetch_event(char *buf, u64 head, size_t mmap_size,
if (needs_swap)
perf_event_header__bswap(&event->header);
- if (head + event->header.size <= mmap_size)
+ event_size = event->header.size;
+ if (head + event_size <= mmap_size)
return event;
/* We're not fetching the event so swap back again */
if (needs_swap)
perf_event_header__bswap(&event->header);
- pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
- " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
+ /* Check if the event fits into the next mmapped buf. */
+ if (event_size <= mmap_size - head % page_size) {
+ /* Remap buf and fetch again. */
+ return NULL;
+ }
+
+ /* Invalid input. Event size should never exceed mmap_size. */
+ pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
+ " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
return error;
}
@@ -2567,7 +2592,7 @@ int perf_session__process_events(struct perf_session *session)
if (perf_data__is_pipe(session->data))
return __perf_session__process_pipe_events(session);
- if (perf_data__is_dir(session->data))
+ if (perf_data__is_dir(session->data) && session->data->dir.nr)
return __perf_session__process_dir_events(session);
return __perf_session__process_events(session);
diff --git a/tools/perf/util/setup.py b/tools/perf/util/setup.py
index 483f05004e68..c255a2c90cd6 100644
--- a/tools/perf/util/setup.py
+++ b/tools/perf/util/setup.py
@@ -1,12 +1,14 @@
-from os import getenv
+from os import getenv, path
from subprocess import Popen, PIPE
from re import sub
cc = getenv("CC")
cc_is_clang = b"clang version" in Popen([cc.split()[0], "-v"], stderr=PIPE).stderr.readline()
+src_feature_tests = getenv('srctree') + '/tools/build/feature'
def clang_has_option(option):
- return [o for o in Popen([cc, option], stderr=PIPE).stderr.readlines() if b"unknown argument" in o] == [ ]
+ cc_output = Popen([cc, option, path.join(src_feature_tests, "test-hello.c") ], stderr=PIPE).stderr.readlines()
+ return [o for o in cc_output if ((b"unknown argument" in o) or (b"is not supported" in o))] == [ ]
if cc_is_clang:
from distutils.sysconfig import get_config_vars
@@ -23,6 +25,8 @@ if cc_is_clang:
vars[var] = sub("-fstack-protector-strong", "", vars[var])
if not clang_has_option("-fno-semantic-interposition"):
vars[var] = sub("-fno-semantic-interposition", "", vars[var])
+ if not clang_has_option("-ffat-lto-objects"):
+ vars[var] = sub("-ffat-lto-objects", "", vars[var])
from distutils.core import setup, Extension
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index ee6f03481215..c1af37e11f98 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
+#include <linux/err.h>
#include <inttypes.h>
#include <math.h>
#include <string.h>
@@ -311,7 +312,7 @@ static int check_per_pkg(struct evsel *counter, struct perf_counts_values *vals,
if (!mask) {
mask = hashmap__new(pkg_id_hash, pkg_id_equal, NULL);
- if (!mask)
+ if (IS_ERR(mask))
return -ENOMEM;
counter->per_pkg_mask = mask;
@@ -471,9 +472,10 @@ int perf_stat_process_counter(struct perf_stat_config *config,
int perf_event__process_stat_event(struct perf_session *session,
union perf_event *event)
{
- struct perf_counts_values count;
+ struct perf_counts_values count, *ptr;
struct perf_record_stat *st = &event->stat;
struct evsel *counter;
+ int cpu_map_idx;
count.val = st->val;
count.ena = st->ena;
@@ -484,8 +486,18 @@ int perf_event__process_stat_event(struct perf_session *session,
pr_err("Failed to resolve counter for stat event.\n");
return -EINVAL;
}
-
- *perf_counts(counter->counts, st->cpu, st->thread) = count;
+ cpu_map_idx = perf_cpu_map__idx(evsel__cpus(counter), (struct perf_cpu){.cpu = st->cpu});
+ if (cpu_map_idx == -1) {
+ pr_err("Invalid CPU %d for event %s.\n", st->cpu, evsel__name(counter));
+ return -EINVAL;
+ }
+ ptr = perf_counts(counter->counts, cpu_map_idx, st->thread);
+ if (ptr == NULL) {
+ pr_err("Failed to find perf count for CPU %d thread %d on event %s.\n",
+ st->cpu, st->thread, evsel__name(counter));
+ return -EINVAL;
+ }
+ *ptr = count;
counter->supported = true;
return 0;
}
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 31cd59a2b66e..ecd377938eea 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1290,7 +1290,7 @@ dso__load_sym_internal(struct dso *dso, struct map *map, struct symsrc *syms_ss,
* For misannotated, zeroed, ASM function sizes.
*/
if (nr > 0) {
- symbols__fixup_end(&dso->symbols);
+ symbols__fixup_end(&dso->symbols, false);
symbols__fixup_duplicate(&dso->symbols);
if (kmap) {
/*
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index dea0fc495185..f72baf636724 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -101,11 +101,6 @@ static int prefix_underscores_count(const char *str)
return tail - str;
}
-void __weak arch__symbols__fixup_end(struct symbol *p, struct symbol *c)
-{
- p->end = c->start;
-}
-
const char * __weak arch__normalize_symbol_name(const char *name)
{
return name;
@@ -217,7 +212,8 @@ again:
}
}
-void symbols__fixup_end(struct rb_root_cached *symbols)
+/* Update zero-sized symbols using the address of the next symbol */
+void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms)
{
struct rb_node *nd, *prevnd = rb_first_cached(symbols);
struct symbol *curr, *prev;
@@ -231,8 +227,29 @@ void symbols__fixup_end(struct rb_root_cached *symbols)
prev = curr;
curr = rb_entry(nd, struct symbol, rb_node);
- if (prev->end == prev->start || prev->end != curr->start)
- arch__symbols__fixup_end(prev, curr);
+ /*
+ * On some architecture kernel text segment start is located at
+ * some low memory address, while modules are located at high
+ * memory addresses (or vice versa). The gap between end of
+ * kernel text segment and beginning of first module's text
+ * segment is very big. Therefore do not fill this gap and do
+ * not assign it to the kernel dso map (kallsyms).
+ *
+ * In kallsyms, it determines module symbols using '[' character
+ * like in:
+ * ffffffffc1937000 T hdmi_driver_init [snd_hda_codec_hdmi]
+ */
+ if (prev->end == prev->start) {
+ /* Last kernel/module symbol mapped to end of page */
+ if (is_kallsyms && (!strchr(prev->name, '[') !=
+ !strchr(curr->name, '[')))
+ prev->end = roundup(prev->end + 4096, 4096);
+ else
+ prev->end = curr->start;
+
+ pr_debug4("%s sym:%s end:%#" PRIx64 "\n",
+ __func__, prev->name, prev->end);
+ }
}
/* Last entry */
@@ -1467,7 +1484,7 @@ int __dso__load_kallsyms(struct dso *dso, const char *filename,
if (kallsyms__delta(kmap, filename, &delta))
return -1;
- symbols__fixup_end(&dso->symbols);
+ symbols__fixup_end(&dso->symbols, true);
symbols__fixup_duplicate(&dso->symbols);
if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
@@ -1659,7 +1676,7 @@ int dso__load_bfd_symbols(struct dso *dso, const char *debugfile)
#undef bfd_asymbol_section
#endif
- symbols__fixup_end(&dso->symbols);
+ symbols__fixup_end(&dso->symbols, false);
symbols__fixup_duplicate(&dso->symbols);
dso->adjust_symbols = 1;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index fbf866d82dcc..0b893dcc8ea6 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -203,7 +203,7 @@ void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
bool kernel);
void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
void symbols__fixup_duplicate(struct rb_root_cached *symbols);
-void symbols__fixup_end(struct rb_root_cached *symbols);
+void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms);
void maps__fixup_end(struct maps *maps);
typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
@@ -241,7 +241,6 @@ const char *arch__normalize_symbol_name(const char *name);
#define SYMBOL_A 0
#define SYMBOL_B 1
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c);
int arch__compare_symbol_names(const char *namea, const char *nameb);
int arch__compare_symbol_names_n(const char *namea, const char *nameb,
unsigned int n);
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index a74b517f7497..94aa40f6e348 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -200,7 +200,8 @@ frame_callback(Dwfl_Frame *state, void *arg)
bool isactivation;
if (!dwfl_frame_pc(state, &pc, NULL)) {
- pr_err("%s", dwfl_errmsg(-1));
+ if (!ui->best_effort)
+ pr_err("%s", dwfl_errmsg(-1));
return DWARF_CB_ABORT;
}
@@ -208,7 +209,8 @@ frame_callback(Dwfl_Frame *state, void *arg)
report_module(pc, ui);
if (!dwfl_frame_pc(state, &pc, &isactivation)) {
- pr_err("%s", dwfl_errmsg(-1));
+ if (!ui->best_effort)
+ pr_err("%s", dwfl_errmsg(-1));
return DWARF_CB_ABORT;
}
@@ -222,7 +224,8 @@ frame_callback(Dwfl_Frame *state, void *arg)
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
struct perf_sample *data,
- int max_stack)
+ int max_stack,
+ bool best_effort)
{
struct unwind_info *ui, ui_buf = {
.sample = data,
@@ -231,6 +234,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
.cb = cb,
.arg = arg,
.max_stack = max_stack,
+ .best_effort = best_effort
};
Dwarf_Word ip;
int err = -EINVAL, i;
diff --git a/tools/perf/util/unwind-libdw.h b/tools/perf/util/unwind-libdw.h
index 0cbd2650e280..8c88bc4f2304 100644
--- a/tools/perf/util/unwind-libdw.h
+++ b/tools/perf/util/unwind-libdw.h
@@ -20,6 +20,7 @@ struct unwind_info {
void *arg;
int max_stack;
int idx;
+ bool best_effort;
struct unwind_entry entries[];
};
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 71a353349181..41e29fc7648a 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -96,6 +96,7 @@ struct unwind_info {
struct perf_sample *sample;
struct machine *machine;
struct thread *thread;
+ bool best_effort;
};
#define dw_read(ptr, type, end) ({ \
@@ -553,7 +554,8 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
ret = perf_reg_value(&val, &ui->sample->user_regs, id);
if (ret) {
- pr_err("unwind: can't read reg %d\n", regnum);
+ if (!ui->best_effort)
+ pr_err("unwind: can't read reg %d\n", regnum);
return ret;
}
@@ -666,7 +668,7 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
return -1;
ret = unw_init_remote(&c, addr_space, ui);
- if (ret)
+ if (ret && !ui->best_effort)
display_error(ret);
while (!ret && (unw_step(&c) > 0) && i < max_stack) {
@@ -704,12 +706,14 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
static int _unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
- struct perf_sample *data, int max_stack)
+ struct perf_sample *data, int max_stack,
+ bool best_effort)
{
struct unwind_info ui = {
.sample = data,
.thread = thread,
.machine = thread->maps->machine,
+ .best_effort = best_effort
};
if (!data->user_regs.regs)
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index e89a5479b361..509c287ee762 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -80,9 +80,11 @@ void unwind__finish_access(struct maps *maps)
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
- struct perf_sample *data, int max_stack)
+ struct perf_sample *data, int max_stack,
+ bool best_effort)
{
if (thread->maps->unwind_libunwind_ops)
- return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
+ return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data,
+ max_stack, best_effort);
return 0;
}
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index ab8ad469c8de..b2a03fa5289b 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -23,13 +23,19 @@ struct unwind_libunwind_ops {
void (*finish_access)(struct maps *maps);
int (*get_entries)(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
- struct perf_sample *data, int max_stack);
+ struct perf_sample *data, int max_stack, bool best_effort);
};
#ifdef HAVE_DWARF_UNWIND_SUPPORT
+/*
+ * When best_effort is set, don't report errors and fail silently. This could
+ * be expanded in the future to be more permissive about things other than
+ * error messages.
+ */
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
- struct perf_sample *data, int max_stack);
+ struct perf_sample *data, int max_stack,
+ bool best_effort);
/* libunwind specific */
#ifdef HAVE_LIBUNWIND_SUPPORT
#ifndef LIBUNWIND__ARCH_REG_ID
@@ -65,7 +71,8 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
void *arg __maybe_unused,
struct thread *thread __maybe_unused,
struct perf_sample *data __maybe_unused,
- int max_stack __maybe_unused)
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused)
{
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-02 23:33:07 +0300