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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-15 09:36:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-15 09:36:24 -0800
commit0ca9b67606f0ce984b5811b0830cfd7d143f6077 (patch)
tree0352af98e9760edd8bbd1712cd0c79f77156217a
parent051b29f2798b5f1a95e745613117eeb367ab4bce (diff)
parent41ac18ebfc429ce3f4d369ef07447d652999a0cd (diff)
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Thomas Gleixner: "Mostly updates to the perf tool plus two fixes to the kernel core code: - Handle tracepoint filters correctly for inherited events (Peter Zijlstra) - Prevent a deadlock in perf_lock_task_context (Paul McKenney) - Add missing newlines to some pr_err() calls (Arnaldo Carvalho de Melo) - Print full source file paths when using 'perf annotate --print-line --full-paths' (Michael Petlan) - Fix 'perf probe -d' when just one out of uprobes and kprobes is enabled (Wang Nan) - Add compiler.h to list.h to fix 'make perf-tar-src-pkg' generated tarballs, i.e. out of tree building (Arnaldo Carvalho de Melo) - Add the llvm-src-base.c and llvm-src-kbuild.c files, generated by the 'perf test' LLVM entries, when running it in-tree, to .gitignore (Yunlong Song) - libbpf error reporting improvements, using a strerror interface to more precisely tell the user about problems with the provided scriptlet, be it in C or as a ready made object file (Wang Nan) - Do not be case sensitive when searching for matching 'perf test' entries (Arnaldo Carvalho de Melo) - Inform the user about objdump failures in 'perf annotate' (Andi Kleen) - Improve the LLVM 'perf test' entry, introduce a new ones for BPF and kbuild tests to check the environment used by clang to compile .c scriptlets (Wang Nan)" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) perf/x86/intel/rapl: Remove the unused RAPL_EVENT_DESC() macro tools include: Add compiler.h to list.h perf probe: Verify parameters in two functions perf session: Add missing newlines to some pr_err() calls perf annotate: Support full source file paths for srcline fix perf test: Add llvm-src-base.c and llvm-src-kbuild.c to .gitignore perf: Fix inherited events vs. tracepoint filters perf: Disable IRQs across RCU RS CS that acquires scheduler lock perf test: Do not be case sensitive when searching for matching tests perf test: Add 'perf test BPF' perf test: Enhance the LLVM tests: add kbuild test perf test: Enhance the LLVM test: update basic BPF test program perf bpf: Improve BPF related error messages perf tools: Make fetch_kernel_version() publicly available bpf tools: Add new API bpf_object__get_kversion() bpf tools: Improve libbpf error reporting perf probe: Cleanup find_perf_probe_point_from_map to reduce redundancy perf annotate: Inform the user about objdump failures in --stdio perf stat: Make stat options global perf sched latency: Fix thread pid reuse issue ...
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_rapl.c6
-rw-r--r--kernel/events/core.c21
-rw-r--r--tools/include/linux/list.h1
-rw-r--r--tools/lib/bpf/.gitignore2
-rw-r--r--tools/lib/bpf/Makefile2
-rw-r--r--tools/lib/bpf/libbpf.c171
-rw-r--r--tools/lib/bpf/libbpf.h23
-rw-r--r--tools/perf/Documentation/perf-trace.txt1
-rw-r--r--tools/perf/Makefile2
-rw-r--r--tools/perf/builtin-sched.c5
-rw-r--r--tools/perf/builtin-stat.c222
-rw-r--r--tools/perf/tests/.gitignore2
-rw-r--r--tools/perf/tests/Build17
-rw-r--r--tools/perf/tests/attr.c3
-rw-r--r--tools/perf/tests/bpf-script-example.c4
-rw-r--r--tools/perf/tests/bpf-script-test-kbuild.c21
-rw-r--r--tools/perf/tests/bpf.c209
-rw-r--r--tools/perf/tests/builtin-test.c6
-rw-r--r--tools/perf/tests/code-reading.c8
-rw-r--r--tools/perf/tests/keep-tracking.c4
-rw-r--r--tools/perf/tests/llvm.c146
-rw-r--r--tools/perf/tests/llvm.h18
-rw-r--r--tools/perf/tests/make5
-rw-r--r--tools/perf/tests/switch-tracking.c4
-rw-r--r--tools/perf/tests/tests.h1
-rw-r--r--tools/perf/util/annotate.c21
-rw-r--r--tools/perf/util/bpf-loader.c143
-rw-r--r--tools/perf/util/bpf-loader.h33
-rw-r--r--tools/perf/util/llvm-utils.c54
-rw-r--r--tools/perf/util/map.c10
-rw-r--r--tools/perf/util/parse-events.c11
-rw-r--r--tools/perf/util/probe-event.c6
-rw-r--r--tools/perf/util/probe-file.c6
-rw-r--r--tools/perf/util/session.c8
-rw-r--r--tools/perf/util/stat-shadow.c5
-rw-r--r--tools/perf/util/util.c30
-rw-r--r--tools/perf/util/util.h8
37 files changed, 947 insertions, 292 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
index 81431c0f0614..ed446bdcbf31 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -107,12 +107,6 @@ static ssize_t __rapl_##_var##_show(struct kobject *kobj, \
static struct kobj_attribute format_attr_##_var = \
__ATTR(_name, 0444, __rapl_##_var##_show, NULL)
-#define RAPL_EVENT_DESC(_name, _config) \
-{ \
- .attr = __ATTR(_name, 0444, rapl_event_show, NULL), \
- .config = _config, \
-}
-
#define RAPL_CNTR_WIDTH 32 /* 32-bit rapl counters */
#define RAPL_EVENT_ATTR_STR(_name, v, str) \
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 1a734e0adfa7..36babfd20648 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1050,13 +1050,13 @@ retry:
/*
* One of the few rules of preemptible RCU is that one cannot do
* rcu_read_unlock() while holding a scheduler (or nested) lock when
- * part of the read side critical section was preemptible -- see
+ * part of the read side critical section was irqs-enabled -- see
* rcu_read_unlock_special().
*
* Since ctx->lock nests under rq->lock we must ensure the entire read
- * side critical section is non-preemptible.
+ * side critical section has interrupts disabled.
*/
- preempt_disable();
+ local_irq_save(*flags);
rcu_read_lock();
ctx = rcu_dereference(task->perf_event_ctxp[ctxn]);
if (ctx) {
@@ -1070,21 +1070,22 @@ retry:
* if so. If we locked the right context, then it
* can't get swapped on us any more.
*/
- raw_spin_lock_irqsave(&ctx->lock, *flags);
+ raw_spin_lock(&ctx->lock);
if (ctx != rcu_dereference(task->perf_event_ctxp[ctxn])) {
- raw_spin_unlock_irqrestore(&ctx->lock, *flags);
+ raw_spin_unlock(&ctx->lock);
rcu_read_unlock();
- preempt_enable();
+ local_irq_restore(*flags);
goto retry;
}
if (!atomic_inc_not_zero(&ctx->refcount)) {
- raw_spin_unlock_irqrestore(&ctx->lock, *flags);
+ raw_spin_unlock(&ctx->lock);
ctx = NULL;
}
}
rcu_read_unlock();
- preempt_enable();
+ if (!ctx)
+ local_irq_restore(*flags);
return ctx;
}
@@ -6913,6 +6914,10 @@ static int perf_tp_filter_match(struct perf_event *event,
{
void *record = data->raw->data;
+ /* only top level events have filters set */
+ if (event->parent)
+ event = event->parent;
+
if (likely(!event->filter) || filter_match_preds(event->filter, record))
return 1;
return 0;
diff --git a/tools/include/linux/list.h b/tools/include/linux/list.h
index 76b014c96893..a017f1595676 100644
--- a/tools/include/linux/list.h
+++ b/tools/include/linux/list.h
@@ -1,3 +1,4 @@
+#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/types.h>
diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore
index 812aeedaea38..f81e549ddfdb 100644
--- a/tools/lib/bpf/.gitignore
+++ b/tools/lib/bpf/.gitignore
@@ -1,2 +1,2 @@
libbpf_version.h
-FEATURE-DUMP
+FEATURE-DUMP.libbpf
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index fc9af57b666e..a3caaf3eafbd 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -180,7 +180,7 @@ config-clean:
clean:
$(call QUIET_CLEAN, libbpf) $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d \
$(RM) LIBBPF-CFLAGS
- $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP
+ $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 4252fc22f78f..e176bad19bcb 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -61,6 +61,60 @@ void libbpf_set_print(libbpf_print_fn_t warn,
__pr_debug = debug;
}
+#define STRERR_BUFSIZE 128
+
+#define ERRNO_OFFSET(e) ((e) - __LIBBPF_ERRNO__START)
+#define ERRCODE_OFFSET(c) ERRNO_OFFSET(LIBBPF_ERRNO__##c)
+#define NR_ERRNO (__LIBBPF_ERRNO__END - __LIBBPF_ERRNO__START)
+
+static const char *libbpf_strerror_table[NR_ERRNO] = {
+ [ERRCODE_OFFSET(LIBELF)] = "Something wrong in libelf",
+ [ERRCODE_OFFSET(FORMAT)] = "BPF object format invalid",
+ [ERRCODE_OFFSET(KVERSION)] = "'version' section incorrect or lost",
+ [ERRCODE_OFFSET(ENDIAN)] = "Endian missmatch",
+ [ERRCODE_OFFSET(INTERNAL)] = "Internal error in libbpf",
+ [ERRCODE_OFFSET(RELOC)] = "Relocation failed",
+ [ERRCODE_OFFSET(VERIFY)] = "Kernel verifier blocks program loading",
+ [ERRCODE_OFFSET(PROG2BIG)] = "Program too big",
+ [ERRCODE_OFFSET(KVER)] = "Incorrect kernel version",
+};
+
+int libbpf_strerror(int err, char *buf, size_t size)
+{
+ if (!buf || !size)
+ return -1;
+
+ err = err > 0 ? err : -err;
+
+ if (err < __LIBBPF_ERRNO__START) {
+ int ret;
+
+ ret = strerror_r(err, buf, size);
+ buf[size - 1] = '\0';
+ return ret;
+ }
+
+ if (err < __LIBBPF_ERRNO__END) {
+ const char *msg;
+
+ msg = libbpf_strerror_table[ERRNO_OFFSET(err)];
+ snprintf(buf, size, "%s", msg);
+ buf[size - 1] = '\0';
+ return 0;
+ }
+
+ snprintf(buf, size, "Unknown libbpf error %d", err);
+ buf[size - 1] = '\0';
+ return -1;
+}
+
+#define CHECK_ERR(action, err, out) do { \
+ err = action; \
+ if (err) \
+ goto out; \
+} while(0)
+
+
/* Copied from tools/perf/util/util.h */
#ifndef zfree
# define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
@@ -258,7 +312,7 @@ static struct bpf_object *bpf_object__new(const char *path,
obj = calloc(1, sizeof(struct bpf_object) + strlen(path) + 1);
if (!obj) {
pr_warning("alloc memory failed for %s\n", path);
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
strcpy(obj->path, path);
@@ -305,7 +359,7 @@ static int bpf_object__elf_init(struct bpf_object *obj)
if (obj_elf_valid(obj)) {
pr_warning("elf init: internal error\n");
- return -EEXIST;
+ return -LIBBPF_ERRNO__LIBELF;
}
if (obj->efile.obj_buf_sz > 0) {
@@ -331,14 +385,14 @@ static int bpf_object__elf_init(struct bpf_object *obj)
if (!obj->efile.elf) {
pr_warning("failed to open %s as ELF file\n",
obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__LIBELF;
goto errout;
}
if (!gelf_getehdr(obj->efile.elf, &obj->efile.ehdr)) {
pr_warning("failed to get EHDR from %s\n",
obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__FORMAT;
goto errout;
}
ep = &obj->efile.ehdr;
@@ -346,7 +400,7 @@ static int bpf_object__elf_init(struct bpf_object *obj)
if ((ep->e_type != ET_REL) || (ep->e_machine != 0)) {
pr_warning("%s is not an eBPF object file\n",
obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__FORMAT;
goto errout;
}
@@ -374,14 +428,14 @@ bpf_object__check_endianness(struct bpf_object *obj)
goto mismatch;
break;
default:
- return -EINVAL;
+ return -LIBBPF_ERRNO__ENDIAN;
}
return 0;
mismatch:
pr_warning("Error: endianness mismatch.\n");
- return -EINVAL;
+ return -LIBBPF_ERRNO__ENDIAN;
}
static int
@@ -402,7 +456,7 @@ bpf_object__init_kversion(struct bpf_object *obj,
if (size != sizeof(kver)) {
pr_warning("invalid kver section in %s\n", obj->path);
- return -EINVAL;
+ return -LIBBPF_ERRNO__FORMAT;
}
memcpy(&kver, data, sizeof(kver));
obj->kern_version = kver;
@@ -444,7 +498,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL)) {
pr_warning("failed to get e_shstrndx from %s\n",
obj->path);
- return -EINVAL;
+ return -LIBBPF_ERRNO__FORMAT;
}
while ((scn = elf_nextscn(elf, scn)) != NULL) {
@@ -456,7 +510,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (gelf_getshdr(scn, &sh) != &sh) {
pr_warning("failed to get section header from %s\n",
obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__FORMAT;
goto out;
}
@@ -464,7 +518,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (!name) {
pr_warning("failed to get section name from %s\n",
obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__FORMAT;
goto out;
}
@@ -472,7 +526,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (!data) {
pr_warning("failed to get section data from %s(%s)\n",
name, obj->path);
- err = -EINVAL;
+ err = -LIBBPF_ERRNO__FORMAT;
goto out;
}
pr_debug("section %s, size %ld, link %d, flags %lx, type=%d\n",
@@ -495,7 +549,7 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
if (obj->efile.symbols) {
pr_warning("bpf: multiple SYMTAB in %s\n",
obj->path);
- err = -EEXIST;
+ err = -LIBBPF_ERRNO__FORMAT;
} else
obj->efile.symbols = data;
} else if ((sh.sh_type == SHT_PROGBITS) &&
@@ -504,7 +558,8 @@ static int bpf_object__elf_collect(struct bpf_object *obj)
err = bpf_object__add_program(obj, data->d_buf,
data->d_size, name, idx);
if (err) {
- char errmsg[128];
+ char errmsg[STRERR_BUFSIZE];
+
strerror_r(-err, errmsg, sizeof(errmsg));
pr_warning("failed to alloc program %s (%s): %s",
name, obj->path, errmsg);
@@ -576,7 +631,7 @@ bpf_program__collect_reloc(struct bpf_program *prog,
if (!gelf_getrel(data, i, &rel)) {
pr_warning("relocation: failed to get %d reloc\n", i);
- return -EINVAL;
+ return -LIBBPF_ERRNO__FORMAT;
}
insn_idx = rel.r_offset / sizeof(struct bpf_insn);
@@ -587,20 +642,20 @@ bpf_program__collect_reloc(struct bpf_program *prog,
&sym)) {
pr_warning("relocation: symbol %"PRIx64" not found\n",
GELF_R_SYM(rel.r_info));
- return -EINVAL;
+ return -LIBBPF_ERRNO__FORMAT;
}
if (insns[insn_idx].code != (BPF_LD | BPF_IMM | BPF_DW)) {
pr_warning("bpf: relocation: invalid relo for insns[%d].code 0x%x\n",
insn_idx, insns[insn_idx].code);
- return -EINVAL;
+ return -LIBBPF_ERRNO__RELOC;
}
map_idx = sym.st_value / sizeof(struct bpf_map_def);
if (map_idx >= nr_maps) {
pr_warning("bpf relocation: map_idx %d large than %d\n",
(int)map_idx, (int)nr_maps - 1);
- return -EINVAL;
+ return -LIBBPF_ERRNO__RELOC;
}
prog->reloc_desc[i].insn_idx = insn_idx;
@@ -683,7 +738,7 @@ bpf_program__relocate(struct bpf_program *prog, int *map_fds)
if (insn_idx >= (int)prog->insns_cnt) {
pr_warning("relocation out of range: '%s'\n",
prog->section_name);
- return -ERANGE;
+ return -LIBBPF_ERRNO__RELOC;
}
insns[insn_idx].src_reg = BPF_PSEUDO_MAP_FD;
insns[insn_idx].imm = map_fds[map_idx];
@@ -721,7 +776,7 @@ static int bpf_object__collect_reloc(struct bpf_object *obj)
if (!obj_elf_valid(obj)) {
pr_warning("Internal error: elf object is closed\n");
- return -EINVAL;
+ return -LIBBPF_ERRNO__INTERNAL;
}
for (i = 0; i < obj->efile.nr_reloc; i++) {
@@ -734,21 +789,21 @@ static int bpf_object__collect_reloc(struct bpf_object *obj)
if (shdr->sh_type != SHT_REL) {
pr_warning("internal error at %d\n", __LINE__);
- return -EINVAL;
+ return -LIBBPF_ERRNO__INTERNAL;
}
prog = bpf_object__find_prog_by_idx(obj, idx);
if (!prog) {
pr_warning("relocation failed: no %d section\n",
idx);
- return -ENOENT;
+ return -LIBBPF_ERRNO__RELOC;
}
err = bpf_program__collect_reloc(prog, nr_maps,
shdr, data,
obj->efile.symbols);
if (err)
- return -EINVAL;
+ return err;
}
return 0;
}
@@ -777,13 +832,23 @@ load_program(struct bpf_insn *insns, int insns_cnt,
goto out;
}
- ret = -EINVAL;
+ ret = -LIBBPF_ERRNO__LOAD;
pr_warning("load bpf program failed: %s\n", strerror(errno));
- if (log_buf) {
+ if (log_buf && log_buf[0] != '\0') {
+ ret = -LIBBPF_ERRNO__VERIFY;
pr_warning("-- BEGIN DUMP LOG ---\n");
pr_warning("\n%s\n", log_buf);
pr_warning("-- END LOG --\n");
+ } else {
+ if (insns_cnt >= BPF_MAXINSNS) {
+ pr_warning("Program too large (%d insns), at most %d insns\n",
+ insns_cnt, BPF_MAXINSNS);
+ ret = -LIBBPF_ERRNO__PROG2BIG;
+ } else if (log_buf) {
+ pr_warning("log buffer is empty\n");
+ ret = -LIBBPF_ERRNO__KVER;
+ }
}
out:
@@ -831,7 +896,7 @@ static int bpf_object__validate(struct bpf_object *obj)
if (obj->kern_version == 0) {
pr_warning("%s doesn't provide kernel version\n",
obj->path);
- return -EINVAL;
+ return -LIBBPF_ERRNO__KVERSION;
}
return 0;
}
@@ -840,32 +905,28 @@ static struct bpf_object *
__bpf_object__open(const char *path, void *obj_buf, size_t obj_buf_sz)
{
struct bpf_object *obj;
+ int err;
if (elf_version(EV_CURRENT) == EV_NONE) {
pr_warning("failed to init libelf for %s\n", path);
- return NULL;
+ return ERR_PTR(-LIBBPF_ERRNO__LIBELF);
}
obj = bpf_object__new(path, obj_buf, obj_buf_sz);
- if (!obj)
- return NULL;
+ if (IS_ERR(obj))
+ return obj;
- if (bpf_object__elf_init(obj))
- goto out;
- if (bpf_object__check_endianness(obj))
- goto out;
- if (bpf_object__elf_collect(obj))
- goto out;
- if (bpf_object__collect_reloc(obj))
- goto out;
- if (bpf_object__validate(obj))
- goto out;
+ CHECK_ERR(bpf_object__elf_init(obj), err, out);
+ CHECK_ERR(bpf_object__check_endianness(obj), err, out);
+ CHECK_ERR(bpf_object__elf_collect(obj), err, out);
+ CHECK_ERR(bpf_object__collect_reloc(obj), err, out);
+ CHECK_ERR(bpf_object__validate(obj), err, out);
bpf_object__elf_finish(obj);
return obj;
out:
bpf_object__close(obj);
- return NULL;
+ return ERR_PTR(err);
}
struct bpf_object *bpf_object__open(const char *path)
@@ -922,6 +983,8 @@ int bpf_object__unload(struct bpf_object *obj)
int bpf_object__load(struct bpf_object *obj)
{
+ int err;
+
if (!obj)
return -EINVAL;
@@ -931,18 +994,16 @@ int bpf_object__load(struct bpf_object *obj)
}
obj->loaded = true;
- if (bpf_object__create_maps(obj))
- goto out;
- if (bpf_object__relocate(obj))
- goto out;
- if (bpf_object__load_progs(obj))
- goto out;
+
+ CHECK_ERR(bpf_object__create_maps(obj), err, out);
+ CHECK_ERR(bpf_object__relocate(obj), err, out);
+ CHECK_ERR(bpf_object__load_progs(obj), err, out);
return 0;
out:
bpf_object__unload(obj);
pr_warning("failed to load object '%s'\n", obj->path);
- return -EINVAL;
+ return err;
}
void bpf_object__close(struct bpf_object *obj)
@@ -990,10 +1051,18 @@ const char *
bpf_object__get_name(struct bpf_object *obj)
{
if (!obj)
- return NULL;
+ return ERR_PTR(-EINVAL);
return obj->path;
}
+unsigned int
+bpf_object__get_kversion(struct bpf_object *obj)
+{
+ if (!obj)
+ return 0;
+ return obj->kern_version;
+}
+
struct bpf_program *
bpf_program__next(struct bpf_program *prev, struct bpf_object *obj)
{
@@ -1034,16 +1103,16 @@ int bpf_program__get_private(struct bpf_program *prog, void **ppriv)
return 0;
}
-const char *bpf_program__title(struct bpf_program *prog, bool dup)
+const char *bpf_program__title(struct bpf_program *prog, bool needs_copy)
{
const char *title;
title = prog->section_name;
- if (dup) {
+ if (needs_copy) {
title = strdup(title);
if (!title) {
pr_warning("failed to strdup program title\n");
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
}
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f16170c95ffd..c9a9aef2806c 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -10,6 +10,26 @@
#include <stdio.h>
#include <stdbool.h>
+#include <linux/err.h>
+
+enum libbpf_errno {
+ __LIBBPF_ERRNO__START = 4000,
+
+ /* Something wrong in libelf */
+ LIBBPF_ERRNO__LIBELF = __LIBBPF_ERRNO__START,
+ LIBBPF_ERRNO__FORMAT, /* BPF object format invalid */
+ LIBBPF_ERRNO__KVERSION, /* Incorrect or no 'version' section */
+ LIBBPF_ERRNO__ENDIAN, /* Endian missmatch */
+ LIBBPF_ERRNO__INTERNAL, /* Internal error in libbpf */
+ LIBBPF_ERRNO__RELOC, /* Relocation failed */
+ LIBBPF_ERRNO__LOAD, /* Load program failure for unknown reason */
+ LIBBPF_ERRNO__VERIFY, /* Kernel verifier blocks program loading */
+ LIBBPF_ERRNO__PROG2BIG, /* Program too big */
+ LIBBPF_ERRNO__KVER, /* Incorrect kernel version */
+ __LIBBPF_ERRNO__END,
+};
+
+int libbpf_strerror(int err, char *buf, size_t size);
/*
* In include/linux/compiler-gcc.h, __printf is defined. However
@@ -36,6 +56,7 @@ void bpf_object__close(struct bpf_object *object);
int bpf_object__load(struct bpf_object *obj);
int bpf_object__unload(struct bpf_object *obj);
const char *bpf_object__get_name(struct bpf_object *obj);
+unsigned int bpf_object__get_kversion(struct bpf_object *obj);
struct bpf_object *bpf_object__next(struct bpf_object *prev);
#define bpf_object__for_each_safe(pos, tmp) \
@@ -63,7 +84,7 @@ int bpf_program__set_private(struct bpf_program *prog, void *priv,
int bpf_program__get_private(struct bpf_program *prog,
void **ppriv);
-const char *bpf_program__title(struct bpf_program *prog, bool dup);
+const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);
int bpf_program__fd(struct bpf_program *prog);
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
index 7ea078658a87..13293de8869f 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -62,7 +62,6 @@ OPTIONS
--verbose=::
Verbosity level.
--i::
--no-inherit::
Child tasks do not inherit counters.
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 480546d5f13b..dcd9a70c7193 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -78,7 +78,7 @@ clean:
# The build-test target is not really parallel, don't print the jobs info:
#
build-test:
- @$(MAKE) -f tests/make --no-print-directory
+ @$(MAKE) SHUF=1 -f tests/make --no-print-directory
#
# All other targets get passed through:
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 0ee6d900e100..e3d3e32c0a93 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1203,12 +1203,13 @@ static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_
static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
{
+ if (l->thread == r->thread)
+ return 0;
if (l->thread->tid < r->thread->tid)
return -1;
if (l->thread->tid > r->thread->tid)
return 1;
-
- return 0;
+ return (int)(l->thread - r->thread);
}
static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 2f438f76cceb..e77880b5094d 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -122,6 +122,9 @@ static bool forever = false;
static struct timespec ref_time;
static struct cpu_map *aggr_map;
static aggr_get_id_t aggr_get_id;
+static bool append_file;
+static const char *output_name;
+static int output_fd;
static volatile int done = 0;
@@ -513,15 +516,6 @@ static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
if (evsel->cgrp)
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
-
- if (csv_output || stat_config.interval)
- return;
-
- if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
- fprintf(output, " # %8.3f CPUs utilized ",
- avg / avg_stats(&walltime_nsecs_stats));
- else
- fprintf(output, " ");
}
static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
@@ -529,7 +523,6 @@ static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
FILE *output = stat_config.output;
double sc = evsel->scale;
const char *fmt;
- int cpu = cpu_map__id_to_cpu(id);
if (csv_output) {
fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
@@ -542,9 +535,6 @@ static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
aggr_printout(evsel, id, nr);
- if (stat_config.aggr_mode == AGGR_GLOBAL)
- cpu = 0;
-
fprintf(output, fmt, avg, csv_sep);
if (evsel->unit)
@@ -556,12 +546,24 @@ static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
if (evsel->cgrp)
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
+}
- if (csv_output || stat_config.interval)
- return;
+static void printout(int id, int nr, struct perf_evsel *counter, double uval)
+{
+ int cpu = cpu_map__id_to_cpu(id);
+
+ if (stat_config.aggr_mode == AGGR_GLOBAL)
+ cpu = 0;
- perf_stat__print_shadow_stats(output, evsel, avg, cpu,
- stat_config.aggr_mode);
+ if (nsec_counter(counter))
+ nsec_printout(id, nr, counter, uval);
+ else
+ abs_printout(id, nr, counter, uval);
+
+ if (!csv_output && !stat_config.interval)
+ perf_stat__print_shadow_stats(stat_config.output, counter,
+ uval, cpu,
+ stat_config.aggr_mode);
}
static void print_aggr(char *prefix)
@@ -617,12 +619,7 @@ static void print_aggr(char *prefix)
continue;
}
uval = val * counter->scale;
-
- if (nsec_counter(counter))
- nsec_printout(id, nr, counter, uval);
- else
- abs_printout(id, nr, counter, uval);
-
+ printout(id, nr, counter, uval);
if (!csv_output)
print_noise(counter, 1.0);
@@ -653,11 +650,7 @@ static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
fprintf(output, "%s", prefix);
uval = val * counter->scale;
-
- if (nsec_counter(counter))
- nsec_printout(thread, 0, counter, uval);
- else
- abs_printout(thread, 0, counter, uval);
+ printout(thread, 0, counter, uval);
if (!csv_output)
print_noise(counter, 1.0);
@@ -707,11 +700,7 @@ static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
}
uval = avg * counter->scale;
-
- if (nsec_counter(counter))
- nsec_printout(-1, 0, counter, uval);
- else
- abs_printout(-1, 0, counter, uval);
+ printout(-1, 0, counter, uval);
print_noise(counter, avg);
@@ -764,12 +753,7 @@ static void print_counter(struct perf_evsel *counter, char *prefix)
}
uval = val * counter->scale;
-
- if (nsec_counter(counter))
- nsec_printout(cpu, 0, counter, uval);
- else
- abs_printout(cpu, 0, counter, uval);
-
+ printout(cpu, 0, counter, uval);
if (!csv_output)
print_noise(counter, 1.0);
print_running(run, ena);
@@ -946,6 +930,67 @@ static int stat__set_big_num(const struct option *opt __maybe_unused,
return 0;
}
+static const struct option stat_options[] = {
+ OPT_BOOLEAN('T', "transaction", &transaction_run,
+ "hardware transaction statistics"),
+ OPT_CALLBACK('e', "event", &evsel_list, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events_option),
+ OPT_CALLBACK(0, "filter", &evsel_list, "filter",
+ "event filter", parse_filter),
+ OPT_BOOLEAN('i', "no-inherit", &no_inherit,
+ "child tasks do not inherit counters"),
+ OPT_STRING('p', "pid", &target.pid, "pid",
+ "stat events on existing process id"),
+ OPT_STRING('t', "tid", &target.tid, "tid",
+ "stat events on existing thread id"),
+ OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_BOOLEAN('g', "group", &group,
+ "put the counters into a counter group"),
+ OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_INTEGER('r', "repeat", &run_count,
+ "repeat command and print average + stddev (max: 100, forever: 0)"),
+ OPT_BOOLEAN('n', "null", &null_run,
+ "null run - dont start any counters"),
+ OPT_INCR('d', "detailed", &detailed_run,
+ "detailed run - start a lot of events"),
+ OPT_BOOLEAN('S', "sync", &sync_run,
+ "call sync() before starting a run"),
+ OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
+ "print large numbers with thousands\' separators",
+ stat__set_big_num),
+ OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
+ "list of cpus to monitor in system-wide"),
+ OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
+ "disable CPU count aggregation", AGGR_NONE),
+ OPT_STRING('x', "field-separator", &csv_sep, "separator",
+ "print counts with custom separator"),
+ OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
+ "monitor event in cgroup name only", parse_cgroups),
+ OPT_STRING('o', "output", &output_name, "file", "output file name"),
+ OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
+ OPT_INTEGER(0, "log-fd", &output_fd,
+ "log output to fd, instead of stderr"),
+ OPT_STRING(0, "pre", &pre_cmd, "command",
+ "command to run prior to the measured command"),
+ OPT_STRING(0, "post", &post_cmd, "command",
+ "command to run after to the measured command"),
+ OPT_UINTEGER('I', "interval-print", &stat_config.interval,
+ "print counts at regular interval in ms (>= 10)"),
+ OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
+ "aggregate counts per processor socket", AGGR_SOCKET),
+ OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
+ "aggregate counts per physical processor core", AGGR_CORE),
+ OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
+ "aggregate counts per thread", AGGR_THREAD),
+ OPT_UINTEGER('D', "delay", &initial_delay,
+ "ms to wait before starting measurement after program start"),
+ OPT_END()
+};
+
static int perf_stat__get_socket(struct cpu_map *map, int cpu)
{
return cpu_map__get_socket(map, cpu, NULL);
@@ -1193,69 +1238,6 @@ static int add_default_attributes(void)
int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
{
- bool append_file = false;
- int output_fd = 0;
- const char *output_name = NULL;
- const struct option options[] = {
- OPT_BOOLEAN('T', "transaction", &transaction_run,
- "hardware transaction statistics"),
- OPT_CALLBACK('e', "event", &evsel_list, "event",
- "event selector. use 'perf list' to list available events",
- parse_events_option),
- OPT_CALLBACK(0, "filter", &evsel_list, "filter",
- "event filter", parse_filter),
- OPT_BOOLEAN('i', "no-inherit", &no_inherit,
- "child tasks do not inherit counters"),
- OPT_STRING('p', "pid", &target.pid, "pid",
- "stat events on existing process id"),
- OPT_STRING('t', "tid", &target.tid, "tid",
- "stat events on existing thread id"),
- OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
- "system-wide collection from all CPUs"),
- OPT_BOOLEAN('g', "group", &group,
- "put the counters into a counter group"),
- OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
- OPT_INCR('v', "verbose", &verbose,
- "be more verbose (show counter open errors, etc)"),
- OPT_INTEGER('r', "repeat", &run_count,
- "repeat command and print average + stddev (max: 100, forever: 0)"),
- OPT_BOOLEAN('n', "null", &null_run,
- "null run - dont start any counters"),
- OPT_INCR('d', "detailed", &detailed_run,
- "detailed run - start a lot of events"),
- OPT_BOOLEAN('S', "sync", &sync_run,
- "call sync() before starting a run"),
- OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
- "print large numbers with thousands\' separators",
- stat__set_big_num),
- OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
- "list of cpus to monitor in system-wide"),
- OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
- "disable CPU count aggregation", AGGR_NONE),
- OPT_STRING('x', "field-separator", &csv_sep, "separator",
- "print counts with custom separator"),
- OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
- "monitor event in cgroup name only", parse_cgroups),
- OPT_STRING('o', "output", &output_name, "file", "output file name"),
- OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
- OPT_INTEGER(0, "log-fd", &output_fd,
- "log output to fd, instead of stderr"),
- OPT_STRING(0, "pre", &pre_cmd, "command",
- "command to run prior to the measured command"),
- OPT_STRING(0, "post", &post_cmd, "command",
- "command to run after to the measured command"),
- OPT_UINTEGER('I', "interval-print", &stat_config.interval,
- "print counts at regular interval in ms (>= 10)"),
- OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
- "aggregate counts per processor socket", AGGR_SOCKET),
- OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
- "aggregate counts per physical processor core", AGGR_CORE),
- OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
- "aggregate counts per thread", AGGR_THREAD),
- OPT_UINTEGER('D', "delay", &initial_delay,
- "ms to wait before starting measurement after program start"),
- OPT_END()
- };
const char * const stat_usage[] = {
"perf stat [<options>] [<command>]",
NULL
@@ -1271,7 +1253,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (evsel_list == NULL)
return -ENOMEM;
- argc = parse_options(argc, argv, options, stat_usage,
+ argc = parse_options(argc, argv, stat_options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
interval = stat_config.interval;
@@ -1281,14 +1263,14 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (output_name && output_fd) {
fprintf(stderr, "cannot use both --output and --log-fd\n");
- parse_options_usage(stat_usage, options, "o", 1);
- parse_options_usage(NULL, options, "log-fd", 0);
+ parse_options_usage(stat_usage, stat_options, "o", 1);
+ parse_options_usage(NULL, stat_options, "log-fd", 0);
goto out;
}
if (output_fd < 0) {
fprintf(stderr, "argument to --log-fd must be a > 0\n");
- parse_options_usage(stat_usage, options, "log-fd", 0);
+ parse_options_usage(stat_usage, stat_options, "log-fd", 0);
goto out;
}
@@ -1328,8 +1310,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
/* User explicitly passed -B? */
if (big_num_opt == 1) {
fprintf(stderr, "-B option not supported with -x\n");
- parse_options_usage(stat_usage, options, "B", 1);
- parse_options_usage(NULL, options, "x", 1);
+ parse_options_usage(stat_usage, stat_options, "B", 1);
+ parse_options_usage(NULL, stat_options, "x", 1);
goto out;
} else /* Nope, so disable big number formatting */
big_num = false;
@@ -1337,11 +1319,11 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
big_num = false;
if (!argc && target__none(&target))
- usage_with_options(stat_usage, options);
+ usage_with_options(stat_usage, stat_options);
if (run_count < 0) {
pr_err("Run count must be a positive number\n");
- parse_options_usage(stat_usage, options, "r", 1);
+ parse_options_usage(stat_usage, stat_options, "r", 1);
goto out;
} else if (run_count == 0) {
forever = true;
@@ -1351,8 +1333,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
fprintf(stderr, "The --per-thread option is only available "
"when monitoring via -p -t options.\n");
- parse_options_usage(NULL, options, "p", 1);
- parse_options_usage(NULL, options, "t", 1);
+ parse_options_usage(NULL, stat_options, "p", 1);
+ parse_options_usage(NULL, stat_options, "t", 1);
goto out;
}
@@ -1366,9 +1348,9 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
fprintf(stderr, "both cgroup and no-aggregation "
"modes only available in system-wide mode\n");
- parse_options_usage(stat_usage, options, "G", 1);
- parse_options_usage(NULL, options, "A", 1);
- parse_options_usage(NULL, options, "a", 1);
+ parse_options_usage(stat_usage, stat_options, "G", 1);
+ parse_options_usage(NULL, stat_options, "A", 1);
+ parse_options_usage(NULL, stat_options, "a", 1);
goto out;
}
@@ -1380,12 +1362,12 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (perf_evlist__create_maps(evsel_list, &target) < 0) {
if (target__has_task(&target)) {
pr_err("Problems finding threads of monitor\n");
- parse_options_usage(stat_usage, options, "p", 1);
- parse_options_usage(NULL, options, "t", 1);
+ parse_options_usage(stat_usage, stat_options, "p", 1);
+ parse_options_usage(NULL, stat_options, "t", 1);
} else if (target__has_cpu(&target)) {
perror("failed to parse CPUs map");
- parse_options_usage(stat_usage, options, "C", 1);
- parse_options_usage(NULL, options, "a", 1);
+ parse_options_usage(stat_usage, stat_options, "C", 1);
+ parse_options_usage(NULL, stat_options, "a", 1);
}
goto out;
}
@@ -1400,7 +1382,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (interval && interval < 100) {
if (interval < 10) {
pr_err("print interval must be >= 10ms\n");
- parse_options_usage(stat_usage, options, "I", 1);
+ parse_options_usage(stat_usage, stat_options, "I", 1);
goto out;
} else
pr_warning("print interval < 100ms. "
diff --git a/tools/perf/tests/.gitignore b/tools/perf/tests/.gitignore
new file mode 100644
index 000000000000..489fc9ffbcb0
--- /dev/null
+++ b/tools/perf/tests/.gitignore
@@ -0,0 +1,2 @@
+llvm-src-base.c
+llvm-src-kbuild.c
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 50de2253cff6..f41ebf8849fe 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -31,9 +31,24 @@ perf-y += sample-parsing.o
perf-y += parse-no-sample-id-all.o
perf-y += kmod-path.o
perf-y += thread-map.o
-perf-y += llvm.o
+perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o
+perf-y += bpf.o
perf-y += topology.o
+$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c
+ $(call rule_mkdir)
+ $(Q)echo '#include <tests/llvm.h>' > $@
+ $(Q)echo 'const char test_llvm__bpf_base_prog[] =' >> $@
+ $(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
+ $(Q)echo ';' >> $@
+
+$(OUTPUT)tests/llvm-src-kbuild.c: tests/bpf-script-test-kbuild.c
+ $(call rule_mkdir)
+ $(Q)echo '#include <tests/llvm.h>' > $@
+ $(Q)echo 'const char test_llvm__bpf_test_kbuild_prog[] =' >> $@
+ $(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
+ $(Q)echo ';' >> $@
+
ifeq ($(ARCH),$(filter $(ARCH),x86 arm arm64))
perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
endif
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
index 2dfc9ad0e6f2..638875a0960a 100644
--- a/tools/perf/tests/attr.c
+++ b/tools/perf/tests/attr.c
@@ -171,6 +171,5 @@ int test__attr(void)
!lstat(path_perf, &st))
return run_dir(path_dir, path_perf);
- fprintf(stderr, " (omitted)");
- return 0;
+ return TEST_SKIP;
}
diff --git a/tools/perf/tests/bpf-script-example.c b/tools/perf/tests/bpf-script-example.c
index 410a70b93b93..0ec9c2c03164 100644
--- a/tools/perf/tests/bpf-script-example.c
+++ b/tools/perf/tests/bpf-script-example.c
@@ -1,3 +1,7 @@
+/*
+ * bpf-script-example.c
+ * Test basic LLVM building
+ */
#ifndef LINUX_VERSION_CODE
# error Need LINUX_VERSION_CODE
# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
diff --git a/tools/perf/tests/bpf-script-test-kbuild.c b/tools/perf/tests/bpf-script-test-kbuild.c
new file mode 100644
index 000000000000..3626924740d8
--- /dev/null
+++ b/tools/perf/tests/bpf-script-test-kbuild.c
@@ -0,0 +1,21 @@
+/*
+ * bpf-script-test-kbuild.c
+ * Test include from kernel header
+ */
+#ifndef LINUX_VERSION_CODE
+# error Need LINUX_VERSION_CODE
+# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
+#endif
+#define SEC(NAME) __attribute__((section(NAME), used))
+
+#include <uapi/linux/fs.h>
+#include <uapi/asm/ptrace.h>
+
+SEC("func=vfs_llseek")
+int bpf_func__vfs_llseek(void *ctx)
+{
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";
+int _version SEC("version") = LINUX_VERSION_CODE;
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
new file mode 100644
index 000000000000..ec16f7812c8b
--- /dev/null
+++ b/tools/perf/tests/bpf.c
@@ -0,0 +1,209 @@
+#include <stdio.h>
+#include <sys/epoll.h>
+#include <util/bpf-loader.h>
+#include <util/evlist.h>
+#include "tests.h"
+#include "llvm.h"
+#include "debug.h"
+#define NR_ITERS 111
+
+#ifdef HAVE_LIBBPF_SUPPORT
+
+static int epoll_pwait_loop(void)
+{
+ int i;
+
+ /* Should fail NR_ITERS times */
+ for (i = 0; i < NR_ITERS; i++)
+ epoll_pwait(-(i + 1), NULL, 0, 0, NULL);
+ return 0;
+}
+
+static struct {
+ enum test_llvm__testcase prog_id;
+ const char *desc;
+ const char *name;
+ const char *msg_compile_fail;
+ const char *msg_load_fail;
+ int (*target_func)(void);
+ int expect_result;
+} bpf_testcase_table[] = {
+ {
+ LLVM_TESTCASE_BASE,
+ "Test basic BPF filtering",
+ "[basic_bpf_test]",
+ "fix 'perf test LLVM' first",
+ "load bpf object failed",
+ &epoll_pwait_loop,
+ (NR_ITERS + 1) / 2,
+ },
+};
+
+static int do_test(struct bpf_object *obj, int (*func)(void),
+ int expect)
+{
+ struct record_opts opts = {
+ .target = {
+ .uid = UINT_MAX,
+ .uses_mmap = true,
+ },
+ .freq = 0,
+ .mmap_pages = 256,
+ .default_interval = 1,
+ };
+
+ char pid[16];
+ char sbuf[STRERR_BUFSIZE];
+ struct perf_evlist *evlist;
+ int i, ret = TEST_FAIL, err = 0, count = 0;
+
+ struct parse_events_evlist parse_evlist;
+ struct parse_events_error parse_error;
+
+ bzero(&parse_error, sizeof(parse_error));
+ bzero(&parse_evlist, sizeof(parse_evlist));
+ parse_evlist.error = &parse_error;
+ INIT_LIST_HEAD(&parse_evlist.list);
+
+ err = parse_events_load_bpf_obj(&parse_evlist, &parse_evlist.list, obj);
+ if (err || list_empty(&parse_evlist.list)) {
+ pr_debug("Failed to add events selected by BPF\n");
+ if (!err)
+ return TEST_FAIL;
+ }
+
+ snprintf(pid, sizeof(pid), "%d", getpid());
+ pid[sizeof(pid) - 1] = '\0';
+ opts.target.tid = opts.target.pid = pid;
+
+ /* Instead of perf_evlist__new_default, don't add default events */
+ evlist = perf_evlist__new();
+ if (!evlist) {
+ pr_debug("No ehough memory to create evlist\n");
+ return TEST_FAIL;
+ }
+
+ err = perf_evlist__create_maps(evlist, &opts.target);
+ if (err < 0) {
+ pr_debug("Not enough memory to create thread/cpu maps\n");
+ goto out_delete_evlist;
+ }
+
+ perf_evlist__splice_list_tail(evlist, &parse_evlist.list);
+ evlist->nr_groups = parse_evlist.nr_groups;
+
+ perf_evlist__config(evlist, &opts);
+
+ err = perf_evlist__open(evlist);
+ if (err < 0) {
+ pr_debug("perf_evlist__open: %s\n",
+ strerror_r(errno, sbuf, sizeof(sbuf)));
+ goto out_delete_evlist;
+ }
+
+ err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
+ if (err < 0) {
+ pr_debug("perf_evlist__mmap: %s\n",
+ strerror_r(errno, sbuf, sizeof(sbuf)));
+ goto out_delete_evlist;
+ }
+
+ perf_evlist__enable(evlist);
+ (*func)();
+ perf_evlist__disable(evlist);
+
+ for (i = 0; i < evlist->nr_mmaps; i++) {
+ union perf_event *event;
+
+ while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+ const u32 type = event->header.type;
+
+ if (type == PERF_RECORD_SAMPLE)
+ count ++;
+ }
+ }
+
+ if (count != expect)
+ pr_debug("BPF filter result incorrect\n");
+
+ ret = TEST_OK;
+
+out_delete_evlist:
+ perf_evlist__delete(evlist);
+ return ret;
+}
+
+static struct bpf_object *
+prepare_bpf(void *obj_buf, size_t obj_buf_sz, const char *name)
+{
+ struct bpf_object *obj;
+
+ obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
+ if (IS_ERR(obj)) {
+ pr_debug("Compile BPF program failed.\n");
+ return NULL;
+ }
+ return obj;
+}
+
+static int __test__bpf(int index)
+{
+ int ret;
+ void *obj_buf;
+ size_t obj_buf_sz;
+ struct bpf_object *obj;
+
+ ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
+ bpf_testcase_table[index].prog_id,
+ true);
+ if (ret != TEST_OK || !obj_buf || !obj_buf_sz) {
+ pr_debug("Unable to get BPF object, %s\n",
+ bpf_testcase_table[index].msg_compile_fail);
+ if (index == 0)
+ return TEST_SKIP;
+ else
+ return TEST_FAIL;
+ }
+
+ obj = prepare_bpf(obj_buf, obj_buf_sz,
+ bpf_testcase_table[index].name);
+ if (!obj) {
+ ret = TEST_FAIL;
+ goto out;
+ }
+
+ ret = do_test(obj,
+ bpf_testcase_table[index].target_func,
+ bpf_testcase_table[index].expect_result);
+out:
+ bpf__clear();
+ return ret;
+}
+
+int test__bpf(void)
+{
+ unsigned int i;
+ int err;
+
+ if (geteuid() != 0) {
+ pr_debug("Only root can run BPF test\n");
+ return TEST_SKIP;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bpf_testcase_table); i++) {
+ err = __test__bpf(i);
+
+ if (err != TEST_OK)
+ return err;
+ }
+
+ return TEST_OK;
+}
+
+#else
+int test__bpf(void)
+{
+ pr_debug("Skip BPF test because BPF support is not compiled\n");
+ return TEST_SKIP;
+}
+#endif
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 66f72d3d6677..80c442eab767 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -166,6 +166,10 @@ static struct test generic_tests[] = {
.func = test_session_topology,
},
{
+ .desc = "Test BPF filter",
+ .func = test__bpf,
+ },
+ {
.func = NULL,
},
};
@@ -192,7 +196,7 @@ static bool perf_test__matches(struct test *test, int curr, int argc, const char
continue;
}
- if (strstr(test->desc, argv[i]))
+ if (strcasestr(test->desc, argv[i]))
return true;
}
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 49b1959dda41..a767a6400c5c 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -613,16 +613,16 @@ int test__code_reading(void)
case TEST_CODE_READING_OK:
return 0;
case TEST_CODE_READING_NO_VMLINUX:
- fprintf(stderr, " (no vmlinux)");
+ pr_debug("no vmlinux\n");
return 0;
case TEST_CODE_READING_NO_KCORE:
- fprintf(stderr, " (no kcore)");
+ pr_debug("no kcore\n");
return 0;
case TEST_CODE_READING_NO_ACCESS:
- fprintf(stderr, " (no access)");
+ pr_debug("no access\n");
return 0;
case TEST_CODE_READING_NO_KERNEL_OBJ:
- fprintf(stderr, " (no kernel obj)");
+ pr_debug("no kernel obj\n");
return 0;
default:
return -1;
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 4d4b9837b630..a2e2269aa093 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -90,8 +90,8 @@ int test__keep_tracking(void)
evsel->attr.enable_on_exec = 0;
if (perf_evlist__open(evlist) < 0) {
- fprintf(stderr, " (not supported)");
- err = 0;
+ pr_debug("Unable to open dummy and cycles event\n");
+ err = TEST_SKIP;
goto out_err;
}
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index 52d55971f66f..bc4cf507cde5 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -2,6 +2,7 @@
#include <bpf/libbpf.h>
#include <util/llvm-utils.h>
#include <util/cache.h>
+#include "llvm.h"
#include "tests.h"
#include "debug.h"
@@ -11,42 +12,58 @@ static int perf_config_cb(const char *var, const char *val,
return perf_default_config(var, val, arg);
}
-/*
- * Randomly give it a "version" section since we don't really load it
- * into kernel
- */
-static const char test_bpf_prog[] =
- "__attribute__((section(\"do_fork\"), used)) "
- "int fork(void *ctx) {return 0;} "
- "char _license[] __attribute__((section(\"license\"), used)) = \"GPL\";"
- "int _version __attribute__((section(\"version\"), used)) = 0x40100;";
-
#ifdef HAVE_LIBBPF_SUPPORT
static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
{
struct bpf_object *obj;
obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
- if (!obj)
- return -1;
+ if (IS_ERR(obj))
+ return TEST_FAIL;
bpf_object__close(obj);
- return 0;
+ return TEST_OK;
}
#else
static int test__bpf_parsing(void *obj_buf __maybe_unused,
size_t obj_buf_sz __maybe_unused)
{
- fprintf(stderr, " (skip bpf parsing)");
- return 0;
+ pr_debug("Skip bpf parsing\n");
+ return TEST_OK;
}
#endif
-int test__llvm(void)
+static struct {
+ const char *source;
+ const char *desc;
+} bpf_source_table[__LLVM_TESTCASE_MAX] = {
+ [LLVM_TESTCASE_BASE] = {
+ .source = test_llvm__bpf_base_prog,
+ .desc = "Basic BPF llvm compiling test",
+ },
+ [LLVM_TESTCASE_KBUILD] = {
+ .source = test_llvm__bpf_test_kbuild_prog,
+ .desc = "Test kbuild searching",
+ },
+};
+
+
+int
+test_llvm__fetch_bpf_obj(void **p_obj_buf,
+ size_t *p_obj_buf_sz,
+ enum test_llvm__testcase index,
+ bool force)
{
- char *tmpl_new, *clang_opt_new;
- void *obj_buf;
- size_t obj_buf_sz;
- int err, old_verbose;
+ const char *source;
+ const char *desc;
+ const char *tmpl_old, *clang_opt_old;
+ char *tmpl_new = NULL, *clang_opt_new = NULL;
+ int err, old_verbose, ret = TEST_FAIL;
+
+ if (index >= __LLVM_TESTCASE_MAX)
+ return TEST_FAIL;
+
+ source = bpf_source_table[index].source;
+ desc = bpf_source_table[index].desc;
perf_config(perf_config_cb, NULL);
@@ -54,45 +71,100 @@ int test__llvm(void)
* Skip this test if user's .perfconfig doesn't set [llvm] section
* and clang is not found in $PATH, and this is not perf test -v
*/
- if (verbose == 0 && !llvm_param.user_set_param && llvm__search_clang()) {
- fprintf(stderr, " (no clang, try 'perf test -v LLVM')");
+ if (!force && (verbose == 0 &&
+ !llvm_param.user_set_param &&
+ llvm__search_clang())) {
+ pr_debug("No clang and no verbosive, skip this test\n");
return TEST_SKIP;
}
- old_verbose = verbose;
/*
* llvm is verbosity when error. Suppress all error output if
* not 'perf test -v'.
*/
+ old_verbose = verbose;
if (verbose == 0)
verbose = -1;
+ *p_obj_buf = NULL;
+ *p_obj_buf_sz = 0;
+
if (!llvm_param.clang_bpf_cmd_template)
- return -1;
+ goto out;
if (!llvm_param.clang_opt)
llvm_param.clang_opt = strdup("");
- err = asprintf(&tmpl_new, "echo '%s' | %s", test_bpf_prog,
- llvm_param.clang_bpf_cmd_template);
+ err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
+ llvm_param.clang_bpf_cmd_template,
+ old_verbose ? "" : " 2>/dev/null");
if (err < 0)
- return -1;
+ goto out;
err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
if (err < 0)
- return -1;
+ goto out;
+ tmpl_old = llvm_param.clang_bpf_cmd_template;
llvm_param.clang_bpf_cmd_template = tmpl_new;
+ clang_opt_old = llvm_param.clang_opt;
llvm_param.clang_opt = clang_opt_new;
- err = llvm__compile_bpf("-", &obj_buf, &obj_buf_sz);
+
+ err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
+
+ llvm_param.clang_bpf_cmd_template = tmpl_old;
+ llvm_param.clang_opt = clang_opt_old;
verbose = old_verbose;
- if (err) {
- if (!verbose)
- fprintf(stderr, " (use -v to see error message)");
- return -1;
- }
+ if (err)
+ goto out;
+
+ ret = TEST_OK;
+out:
+ free(tmpl_new);
+ free(clang_opt_new);
+ if (ret != TEST_OK)
+ pr_debug("Failed to compile test case: '%s'\n", desc);
+ return ret;
+}
+
+int test__llvm(void)
+{
+ enum test_llvm__testcase i;
+
+ for (i = 0; i < __LLVM_TESTCASE_MAX; i++) {
+ int ret;
+ void *obj_buf = NULL;
+ size_t obj_buf_sz = 0;
+
+ ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
+ i, false);
- err = test__bpf_parsing(obj_buf, obj_buf_sz);
- free(obj_buf);
- return err;
+ if (ret == TEST_OK) {
+ ret = test__bpf_parsing(obj_buf, obj_buf_sz);
+ if (ret != TEST_OK)
+ pr_debug("Failed to parse test case '%s'\n",
+ bpf_source_table[i].desc);
+ }
+ free(obj_buf);
+
+ switch (ret) {
+ case TEST_SKIP:
+ return TEST_SKIP;
+ case TEST_OK:
+ break;
+ default:
+ /*
+ * Test 0 is the basic LLVM test. If test 0
+ * fail, the basic LLVM support not functional
+ * so the whole test should fail. If other test
+ * case fail, it can be fixed by adjusting
+ * config so don't report error.
+ */
+ if (i == 0)
+ return TEST_FAIL;
+ else
+ return TEST_SKIP;
+ }
+ }
+ return TEST_OK;
}
diff --git a/tools/perf/tests/llvm.h b/tools/perf/tests/llvm.h
new file mode 100644
index 000000000000..d91d8f44efee
--- /dev/null
+++ b/tools/perf/tests/llvm.h
@@ -0,0 +1,18 @@
+#ifndef PERF_TEST_LLVM_H
+#define PERF_TEST_LLVM_H
+
+#include <stddef.h> /* for size_t */
+#include <stdbool.h> /* for bool */
+
+extern const char test_llvm__bpf_base_prog[];
+extern const char test_llvm__bpf_test_kbuild_prog[];
+
+enum test_llvm__testcase {
+ LLVM_TESTCASE_BASE,
+ LLVM_TESTCASE_KBUILD,
+ __LLVM_TESTCASE_MAX,
+};
+
+int test_llvm__fetch_bpf_obj(void **p_obj_buf, size_t *p_obj_buf_sz,
+ enum test_llvm__testcase index, bool force);
+#endif
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index 2cbd0c6901e3..8ea3dffc5065 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -221,6 +221,11 @@ test_O = $(if $(test_$1),$(test_$1),$(test_default_O))
all:
+ifdef SHUF
+run := $(shell shuf -e $(run))
+run_O := $(shell shuf -e $(run_O))
+endif
+
ifdef DEBUG
d := $(info run $(run))
d := $(info run_O $(run_O))
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index e698742d4fec..a02af503100c 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -366,7 +366,7 @@ int test__switch_tracking(void)
/* Third event */
if (!perf_evlist__can_select_event(evlist, sched_switch)) {
- fprintf(stderr, " (no sched_switch)");
+ pr_debug("No sched_switch\n");
err = 0;
goto out;
}
@@ -442,7 +442,7 @@ int test__switch_tracking(void)
}
if (perf_evlist__open(evlist) < 0) {
- fprintf(stderr, " (not supported)");
+ pr_debug("Not supported\n");
err = 0;
goto out;
}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index c80486969f83..3c8734a3abbc 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -66,6 +66,7 @@ int test__fdarray__add(void);
int test__kmod_path__parse(void);
int test__thread_map(void);
int test__llvm(void);
+int test__bpf(void);
int test_session_topology(void);
#if defined(__arm__) || defined(__aarch64__)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 0fc8d7a2fea5..1dd1949b0e79 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1084,6 +1084,7 @@ int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
struct kcore_extract kce;
bool delete_extract = false;
int lineno = 0;
+ int nline;
if (filename)
symbol__join_symfs(symfs_filename, filename);
@@ -1179,6 +1180,9 @@ fallback:
ret = decompress_to_file(m.ext, symfs_filename, fd);
+ if (ret)
+ pr_err("Cannot decompress %s %s\n", m.ext, symfs_filename);
+
free(m.ext);
close(fd);
@@ -1204,13 +1208,25 @@ fallback:
pr_debug("Executing: %s\n", command);
file = popen(command, "r");
- if (!file)
+ if (!file) {
+ pr_err("Failure running %s\n", command);
+ /*
+ * If we were using debug info should retry with
+ * original binary.
+ */
goto out_remove_tmp;
+ }
- while (!feof(file))
+ nline = 0;
+ while (!feof(file)) {
if (symbol__parse_objdump_line(sym, map, file, privsize,
&lineno) < 0)
break;
+ nline++;
+ }
+
+ if (nline == 0)
+ pr_err("No output from %s\n", command);
/*
* kallsyms does not have symbol sizes so there may a nop at the end.
@@ -1604,6 +1620,7 @@ int symbol__tty_annotate(struct symbol *sym, struct map *map,
len = symbol__size(sym);
if (print_lines) {
+ srcline_full_filename = full_paths;
symbol__get_source_line(sym, map, evsel, &source_line, len);
print_summary(&source_line, dso->long_name);
}
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index ba6f7526b282..4c50411371db 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -26,18 +26,40 @@ static int libbpf_##name(const char *fmt, ...) \
return ret; \
}
-DEFINE_PRINT_FN(warning, 0)
-DEFINE_PRINT_FN(info, 0)
+DEFINE_PRINT_FN(warning, 1)
+DEFINE_PRINT_FN(info, 1)
DEFINE_PRINT_FN(debug, 1)
struct bpf_prog_priv {
struct perf_probe_event pev;
};
+static bool libbpf_initialized;
+
+struct bpf_object *
+bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz, const char *name)
+{
+ struct bpf_object *obj;
+
+ if (!libbpf_initialized) {
+ libbpf_set_print(libbpf_warning,
+ libbpf_info,
+ libbpf_debug);
+ libbpf_initialized = true;
+ }
+
+ obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, name);
+ if (IS_ERR(obj)) {
+ pr_debug("bpf: failed to load buffer\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ return obj;
+}
+
struct bpf_object *bpf__prepare_load(const char *filename, bool source)
{
struct bpf_object *obj;
- static bool libbpf_initialized;
if (!libbpf_initialized) {
libbpf_set_print(libbpf_warning,
@@ -53,15 +75,15 @@ struct bpf_object *bpf__prepare_load(const char *filename, bool source)
err = llvm__compile_bpf(filename, &obj_buf, &obj_buf_sz);
if (err)
- return ERR_PTR(err);
+ return ERR_PTR(-BPF_LOADER_ERRNO__COMPILE);
obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, filename);
free(obj_buf);
} else
obj = bpf_object__open(filename);
- if (!obj) {
+ if (IS_ERR(obj)) {
pr_debug("bpf: failed to load %s\n", filename);
- return ERR_PTR(-EINVAL);
+ return obj;
}
return obj;
@@ -96,9 +118,9 @@ config_bpf_program(struct bpf_program *prog)
int err;
config_str = bpf_program__title(prog, false);
- if (!config_str) {
+ if (IS_ERR(config_str)) {
pr_debug("bpf: unable to get title for program\n");
- return -EINVAL;
+ return PTR_ERR(config_str);
}
priv = calloc(sizeof(*priv), 1);
@@ -113,14 +135,14 @@ config_bpf_program(struct bpf_program *prog)
if (err < 0) {
pr_debug("bpf: '%s' is not a valid config string\n",
config_str);
- err = -EINVAL;
+ err = -BPF_LOADER_ERRNO__CONFIG;
goto errout;
}
if (pev->group && strcmp(pev->group, PERF_BPF_PROBE_GROUP)) {
pr_debug("bpf: '%s': group for event is set and not '%s'.\n",
config_str, PERF_BPF_PROBE_GROUP);
- err = -EINVAL;
+ err = -BPF_LOADER_ERRNO__GROUP;
goto errout;
} else if (!pev->group)
pev->group = strdup(PERF_BPF_PROBE_GROUP);
@@ -132,9 +154,9 @@ config_bpf_program(struct bpf_program *prog)
}
if (!pev->event) {
- pr_debug("bpf: '%s': event name is missing\n",
+ pr_debug("bpf: '%s': event name is missing. Section name should be 'key=value'\n",
config_str);
- err = -EINVAL;
+ err = -BPF_LOADER_ERRNO__EVENTNAME;
goto errout;
}
pr_debug("bpf: config '%s' is ok\n", config_str);
@@ -285,7 +307,7 @@ int bpf__foreach_tev(struct bpf_object *obj,
(void **)&priv);
if (err || !priv) {
pr_debug("bpf: failed to get private field\n");
- return -EINVAL;
+ return -BPF_LOADER_ERRNO__INTERNAL;
}
pev = &priv->pev;
@@ -308,13 +330,57 @@ int bpf__foreach_tev(struct bpf_object *obj,
return 0;
}
+#define ERRNO_OFFSET(e) ((e) - __BPF_LOADER_ERRNO__START)
+#define ERRCODE_OFFSET(c) ERRNO_OFFSET(BPF_LOADER_ERRNO__##c)
+#define NR_ERRNO (__BPF_LOADER_ERRNO__END - __BPF_LOADER_ERRNO__START)
+
+static const char *bpf_loader_strerror_table[NR_ERRNO] = {
+ [ERRCODE_OFFSET(CONFIG)] = "Invalid config string",
+ [ERRCODE_OFFSET(GROUP)] = "Invalid group name",
+ [ERRCODE_OFFSET(EVENTNAME)] = "No event name found in config string",
+ [ERRCODE_OFFSET(INTERNAL)] = "BPF loader internal error",
+ [ERRCODE_OFFSET(COMPILE)] = "Error when compiling BPF scriptlet",
+};
+
+static int
+bpf_loader_strerror(int err, char *buf, size_t size)
+{
+ char sbuf[STRERR_BUFSIZE];
+ const char *msg;
+
+ if (!buf || !size)
+ return -1;
+
+ err = err > 0 ? err : -err;
+
+ if (err >= __LIBBPF_ERRNO__START)
+ return libbpf_strerror(err, buf, size);
+
+ if (err >= __BPF_LOADER_ERRNO__START && err < __BPF_LOADER_ERRNO__END) {
+ msg = bpf_loader_strerror_table[ERRNO_OFFSET(err)];
+ snprintf(buf, size, "%s", msg);
+ buf[size - 1] = '\0';
+ return 0;
+ }
+
+ if (err >= __BPF_LOADER_ERRNO__END)
+ snprintf(buf, size, "Unknown bpf loader error %d", err);
+ else
+ snprintf(buf, size, "%s",
+ strerror_r(err, sbuf, sizeof(sbuf)));
+
+ buf[size - 1] = '\0';
+ return -1;
+}
+
#define bpf__strerror_head(err, buf, size) \
char sbuf[STRERR_BUFSIZE], *emsg;\
if (!size)\
return 0;\
if (err < 0)\
err = -err;\
- emsg = strerror_r(err, sbuf, sizeof(sbuf));\
+ bpf_loader_strerror(err, sbuf, sizeof(sbuf));\
+ emsg = sbuf;\
switch (err) {\
default:\
scnprintf(buf, size, "%s", emsg);\
@@ -330,23 +396,62 @@ int bpf__foreach_tev(struct bpf_object *obj,
}\
buf[size - 1] = '\0';
+int bpf__strerror_prepare_load(const char *filename, bool source,
+ int err, char *buf, size_t size)
+{
+ size_t n;
+ int ret;
+
+ n = snprintf(buf, size, "Failed to load %s%s: ",
+ filename, source ? " from source" : "");
+ if (n >= size) {
+ buf[size - 1] = '\0';
+ return 0;
+ }
+ buf += n;
+ size -= n;
+
+ ret = bpf_loader_strerror(err, buf, size);
+ buf[size - 1] = '\0';
+ return ret;
+}
+
int bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
int err, char *buf, size_t size)
{
bpf__strerror_head(err, buf, size);
bpf__strerror_entry(EEXIST, "Probe point exist. Try use 'perf probe -d \"*\"'");
- bpf__strerror_entry(EPERM, "You need to be root, and /proc/sys/kernel/kptr_restrict should be 0\n");
- bpf__strerror_entry(ENOENT, "You need to check probing points in BPF file\n");
+ bpf__strerror_entry(EACCES, "You need to be root");
+ bpf__strerror_entry(EPERM, "You need to be root, and /proc/sys/kernel/kptr_restrict should be 0");
+ bpf__strerror_entry(ENOENT, "You need to check probing points in BPF file");
bpf__strerror_end(buf, size);
return 0;
}
-int bpf__strerror_load(struct bpf_object *obj __maybe_unused,
+int bpf__strerror_load(struct bpf_object *obj,
int err, char *buf, size_t size)
{
bpf__strerror_head(err, buf, size);
- bpf__strerror_entry(EINVAL, "%s: Are you root and runing a CONFIG_BPF_SYSCALL kernel?",
- emsg)
+ case LIBBPF_ERRNO__KVER: {
+ unsigned int obj_kver = bpf_object__get_kversion(obj);
+ unsigned int real_kver;
+
+ if (fetch_kernel_version(&real_kver, NULL, 0)) {
+ scnprintf(buf, size, "Unable to fetch kernel version");
+ break;
+ }
+
+ if (obj_kver != real_kver) {
+ scnprintf(buf, size,
+ "'version' ("KVER_FMT") doesn't match running kernel ("KVER_FMT")",
+ KVER_PARAM(obj_kver),
+ KVER_PARAM(real_kver));
+ break;
+ }
+
+ scnprintf(buf, size, "Failed to load program for unknown reason");
+ break;
+ }
bpf__strerror_end(buf, size);
return 0;
}
diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h
index ccd8d7fd79d3..9caf3ae4acf3 100644
--- a/tools/perf/util/bpf-loader.h
+++ b/tools/perf/util/bpf-loader.h
@@ -8,9 +8,21 @@
#include <linux/compiler.h>
#include <linux/err.h>
#include <string.h>
+#include <bpf/libbpf.h>
#include "probe-event.h"
#include "debug.h"
+enum bpf_loader_errno {
+ __BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100,
+ /* Invalid config string */
+ BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START,
+ BPF_LOADER_ERRNO__GROUP, /* Invalid group name */
+ BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */
+ BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */
+ BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */
+ __BPF_LOADER_ERRNO__END,
+};
+
struct bpf_object;
#define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
@@ -19,6 +31,11 @@ typedef int (*bpf_prog_iter_callback_t)(struct probe_trace_event *tev,
#ifdef HAVE_LIBBPF_SUPPORT
struct bpf_object *bpf__prepare_load(const char *filename, bool source);
+int bpf__strerror_prepare_load(const char *filename, bool source,
+ int err, char *buf, size_t size);
+
+struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz,
+ const char *name);
void bpf__clear(void);
@@ -41,6 +58,13 @@ bpf__prepare_load(const char *filename __maybe_unused,
return ERR_PTR(-ENOTSUP);
}
+static inline struct bpf_object *
+bpf__prepare_load_buffer(void *obj_buf __maybe_unused,
+ size_t obj_buf_sz __maybe_unused)
+{
+ return ERR_PTR(-ENOTSUP);
+}
+
static inline void bpf__clear(void) { }
static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;}
@@ -67,6 +91,15 @@ __bpf_strerror(char *buf, size_t size)
return 0;
}
+static inline
+int bpf__strerror_prepare_load(const char *filename __maybe_unused,
+ bool source __maybe_unused,
+ int err __maybe_unused,
+ char *buf, size_t size)
+{
+ return __bpf_strerror(buf, size);
+}
+
static inline int
bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
int err __maybe_unused,
diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 4f6a4780bd5f..00724d496d38 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -4,17 +4,18 @@
*/
#include <stdio.h>
-#include <sys/utsname.h>
#include "util.h"
#include "debug.h"
#include "llvm-utils.h"
#include "cache.h"
#define CLANG_BPF_CMD_DEFAULT_TEMPLATE \
- "$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS " \
- "$KERNEL_INC_OPTIONS -Wno-unused-value " \
- "-Wno-pointer-sign -working-directory " \
- "$WORKING_DIR -c \"$CLANG_SOURCE\" -target bpf -O2 -o -"
+ "$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\
+ "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \
+ "$CLANG_OPTIONS $KERNEL_INC_OPTIONS " \
+ "-Wno-unused-value -Wno-pointer-sign " \
+ "-working-directory $WORKING_DIR " \
+ "-c \"$CLANG_SOURCE\" -target bpf -O2 -o -"
struct llvm_param llvm_param = {
.clang_path = "clang",
@@ -214,18 +215,19 @@ static int detect_kbuild_dir(char **kbuild_dir)
const char *suffix_dir = "";
char *autoconf_path;
- struct utsname utsname;
int err;
if (!test_dir) {
- err = uname(&utsname);
- if (err) {
- pr_warning("uname failed: %s\n", strerror(errno));
+ /* _UTSNAME_LENGTH is 65 */
+ char release[128];
+
+ err = fetch_kernel_version(NULL, release,
+ sizeof(release));
+ if (err)
return -EINVAL;
- }
- test_dir = utsname.release;
+ test_dir = release;
prefix_dir = "/lib/modules/";
suffix_dir = "/build";
}
@@ -326,13 +328,15 @@ get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts)
int llvm__compile_bpf(const char *path, void **p_obj_buf,
size_t *p_obj_buf_sz)
{
- int err;
- char clang_path[PATH_MAX];
+ size_t obj_buf_sz;
+ void *obj_buf = NULL;
+ int err, nr_cpus_avail;
+ unsigned int kernel_version;
+ char linux_version_code_str[64];
const char *clang_opt = llvm_param.clang_opt;
- const char *template = llvm_param.clang_bpf_cmd_template;
+ char clang_path[PATH_MAX], nr_cpus_avail_str[64];
char *kbuild_dir = NULL, *kbuild_include_opts = NULL;
- void *obj_buf = NULL;
- size_t obj_buf_sz;
+ const char *template = llvm_param.clang_bpf_cmd_template;
if (!template)
template = CLANG_BPF_CMD_DEFAULT_TEMPLATE;
@@ -354,6 +358,24 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
*/
get_kbuild_opts(&kbuild_dir, &kbuild_include_opts);
+ nr_cpus_avail = sysconf(_SC_NPROCESSORS_CONF);
+ if (nr_cpus_avail <= 0) {
+ pr_err(
+"WARNING:\tunable to get available CPUs in this system: %s\n"
+" \tUse 128 instead.\n", strerror(errno));
+ nr_cpus_avail = 128;
+ }
+ snprintf(nr_cpus_avail_str, sizeof(nr_cpus_avail_str), "%d",
+ nr_cpus_avail);
+
+ if (fetch_kernel_version(&kernel_version, NULL, 0))
+ kernel_version = 0;
+
+ snprintf(linux_version_code_str, sizeof(linux_version_code_str),
+ "0x%x", kernel_version);
+
+ force_set_env("NR_CPUS", nr_cpus_avail_str);
+ force_set_env("LINUX_VERSION_CODE", linux_version_code_str);
force_set_env("CLANG_EXEC", clang_path);
force_set_env("CLANG_OPTIONS", clang_opt);
force_set_env("KERNEL_INC_OPTIONS", kbuild_include_opts);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 4e38c396a897..afc6b56cf749 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -644,6 +644,12 @@ size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
return printed;
}
+static void __map_groups__insert(struct map_groups *mg, struct map *map)
+{
+ __maps__insert(&mg->maps[map->type], map);
+ map->groups = mg;
+}
+
static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
{
struct rb_root *root;
@@ -682,7 +688,7 @@ static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp
}
before->end = map->start;
- __maps__insert(maps, before);
+ __map_groups__insert(pos->groups, before);
if (verbose >= 2)
map__fprintf(before, fp);
}
@@ -696,7 +702,7 @@ static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp
}
after->start = map->end;
- __maps__insert(maps, after);
+ __map_groups__insert(pos->groups, after);
if (verbose >= 2)
map__fprintf(after, fp);
}
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index bee60583839a..e48d9da75707 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -632,19 +632,20 @@ int parse_events_load_bpf(struct parse_events_evlist *data,
struct bpf_object *obj;
obj = bpf__prepare_load(bpf_file_name, source);
- if (IS_ERR(obj) || !obj) {
+ if (IS_ERR(obj)) {
char errbuf[BUFSIZ];
int err;
- err = obj ? PTR_ERR(obj) : -EINVAL;
+ err = PTR_ERR(obj);
if (err == -ENOTSUP)
snprintf(errbuf, sizeof(errbuf),
"BPF support is not compiled");
else
- snprintf(errbuf, sizeof(errbuf),
- "BPF object file '%s' is invalid",
- bpf_file_name);
+ bpf__strerror_prepare_load(bpf_file_name,
+ source,
+ -err, errbuf,
+ sizeof(errbuf));
data->error->help = strdup("(add -v to see detail)");
data->error->str = strdup(errbuf);
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index b51a8bfb40f9..03875f9154e7 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1895,9 +1895,8 @@ static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
sym = map__find_symbol(map, addr, NULL);
} else {
if (tp->symbol && !addr) {
- ret = kernel_get_symbol_address_by_name(tp->symbol,
- &addr, true, false);
- if (ret < 0)
+ if (kernel_get_symbol_address_by_name(tp->symbol,
+ &addr, true, false) < 0)
goto out;
}
if (addr) {
@@ -1905,6 +1904,7 @@ static int find_perf_probe_point_from_map(struct probe_trace_point *tp,
sym = __find_kernel_function(addr, &map);
}
}
+
if (!sym)
goto out;
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index 89dbeb92c68e..e3b3b92e4458 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -138,6 +138,9 @@ struct strlist *probe_file__get_rawlist(int fd)
char *p;
struct strlist *sl;
+ if (fd < 0)
+ return NULL;
+
sl = strlist__new(NULL, NULL);
fp = fdopen(dup(fd), "r");
@@ -271,6 +274,9 @@ int probe_file__get_events(int fd, struct strfilter *filter,
const char *p;
int ret = -ENOENT;
+ if (!plist)
+ return -EINVAL;
+
namelist = __probe_file__get_namelist(fd, true);
if (!namelist)
return -ENOENT;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 428149bc64d2..c35ffdd360fe 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -29,7 +29,7 @@ static int perf_session__open(struct perf_session *session)
struct perf_data_file *file = session->file;
if (perf_session__read_header(session) < 0) {
- pr_err("incompatible file format (rerun with -v to learn more)");
+ pr_err("incompatible file format (rerun with -v to learn more)\n");
return -1;
}
@@ -37,17 +37,17 @@ static int perf_session__open(struct perf_session *session)
return 0;
if (!perf_evlist__valid_sample_type(session->evlist)) {
- pr_err("non matching sample_type");
+ pr_err("non matching sample_type\n");
return -1;
}
if (!perf_evlist__valid_sample_id_all(session->evlist)) {
- pr_err("non matching sample_id_all");
+ pr_err("non matching sample_id_all\n");
return -1;
}
if (!perf_evlist__valid_read_format(session->evlist)) {
- pr_err("non matching read_format");
+ pr_err("non matching read_format\n");
return -1;
}
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 2a5d8d7698ae..6ac03146889d 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -413,6 +413,11 @@ void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
ratio = total / avg;
fprintf(out, " # %8.0f cycles / elision ", ratio);
+ } else if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) {
+ if ((ratio = avg_stats(&walltime_nsecs_stats)) != 0)
+ fprintf(out, " # %8.3f CPUs utilized ", avg / ratio);
+ else
+ fprintf(out, " ");
} else if (runtime_nsecs_stats[cpu].n != 0) {
char unit = 'M';
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index cd12c25e4ea4..47b1e36c7ea0 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -3,6 +3,7 @@
#include "debug.h"
#include <api/fs/fs.h>
#include <sys/mman.h>
+#include <sys/utsname.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
#endif
@@ -665,3 +666,32 @@ bool find_process(const char *name)
closedir(dir);
return ret ? false : true;
}
+
+int
+fetch_kernel_version(unsigned int *puint, char *str,
+ size_t str_size)
+{
+ struct utsname utsname;
+ int version, patchlevel, sublevel, err;
+
+ if (uname(&utsname))
+ return -1;
+
+ if (str && str_size) {
+ strncpy(str, utsname.release, str_size);
+ str[str_size - 1] = '\0';
+ }
+
+ err = sscanf(utsname.release, "%d.%d.%d",
+ &version, &patchlevel, &sublevel);
+
+ if (err != 3) {
+ pr_debug("Unablt to get kernel version from uname '%s'\n",
+ utsname.release);
+ return -1;
+ }
+
+ if (puint)
+ *puint = (version << 16) + (patchlevel << 8) + sublevel;
+ return 0;
+}
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 4cfb913aa9e0..dcc659017976 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -350,4 +350,12 @@ static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int
int get_stack_size(const char *str, unsigned long *_size);
+int fetch_kernel_version(unsigned int *puint,
+ char *str, size_t str_sz);
+#define KVER_VERSION(x) (((x) >> 16) & 0xff)
+#define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff)
+#define KVER_SUBLEVEL(x) ((x) & 0xff)
+#define KVER_FMT "%d.%d.%d"
+#define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
+
#endif /* GIT_COMPAT_UTIL_H */