Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf updates from Ingo Molnar:
 "Kernel side changes:

   - Add branch type profiling/tracing support. (Jin Yao)

   - Add the PERF_SAMPLE_PHYS_ADDR ABI to allow the tracing/profiling of
     physical memory addresses, where the PMU supports it. (Kan Liang)

   - Export some PMU capability details in the new
     /sys/bus/event_source/devices/cpu/caps/ sysfs directory. (Andi
     Kleen)

   - Aux data fixes and updates (Will Deacon)

   - kprobes fixes and updates (Masami Hiramatsu)

   - AMD uncore PMU driver fixes and updates (Janakarajan Natarajan)

  On the tooling side, here's a (limited!) list of highlights - there
  were many other changes that I could not list, see the shortlog and
  git history for details:

  UI improvements:

   - Implement a visual marker for fused x86 instructions in the
     annotate TUI browser, available now in 'perf report', more work
     needed to have it available as well in 'perf top' (Jin Yao)

     Further explanation from one of Jin's patches:

             │   ┌──cmpl   $0x0,argp_program_version_hook
       81.93 │   ├──je     20
             │   │  lock   cmpxchg %esi,0x38a9a4(%rip)
             │   │↓ jne    29
             │   │↓ jmp    43
       11.47 │20:└─→cmpxch %esi,0x38a999(%rip)

     That means the cmpl+je is a fused instruction pair and they should
     be considered together.

   - Record the branch type and then show statistics and info about in
     callchain entries (Jin Yao)

     Example from one of Jin's patches:

        # perf record -g -j any,save_type
        # perf report --branch-history --stdio --no-children

        38.50%  div.c:45                [.] main                    div
                |
                ---main div.c:42 (RET CROSS_2M cycles:2)
                   compute_flag div.c:28 (cycles:2)
                   compute_flag div.c:27 (RET CROSS_2M cycles:1)
                   rand rand.c:28 (cycles:1)
                   rand rand.c:28 (RET CROSS_2M cycles:1)
                   __random random.c:298 (cycles:1)
                   __random random.c:297 (COND_BWD CROSS_2M cycles:1)
                   __random random.c:295 (cycles:1)
                   __random random.c:295 (COND_BWD CROSS_2M cycles:1)
                   __random random.c:295 (cycles:1)
                   __random random.c:295 (RET CROSS_2M cycles:9)

  namespaces support:

   - Add initial support for namespaces, using setns to access files in
     namespaces, grabbing their build-ids, etc. (Krister Johansen)

  perf trace enhancements:

   - Beautify pkey_{alloc,free,mprotect} arguments in 'perf trace'
     (Arnaldo Carvalho de Melo)

   - Add initial 'clone' syscall args beautifier in 'perf trace'
     (Arnaldo Carvalho de Melo)

   - Ignore 'fd' and 'offset' args for MAP_ANONYMOUS in 'perf trace'
     (Arnaldo Carvalho de Melo)

   - Beautifiers for the 'cmd' arg of several ioctl types, including:
     sound, DRM, KVM, vhost virtio and perf_events. (Arnaldo Carvalho de
     Melo)

   - Add PERF_SAMPLE_CALLCHAIN and PERF_RECORD_MMAP[2] to 'perf data'
     CTF conversion, allowing CTF trace visualization tools to show
     callchains and to resolve symbols (Geneviève Bastien)

   - Beautify the fcntl syscall, which is an interesting one in the
     sense that infrastructure had to be put in place to change the
     formatters of some arguments according to the value in a previous
     one, i.e. cmd dictates how arg and the syscall return will be
     formatted. (Arnaldo Carvalho de Melo

  perf stat enhancements:

   - Use group read for event groups in 'perf stat', reducing overhead
     when groups are defined in the event specification, i.e. when using
     {} to enclose a list of events, asking them to be read at the same
     time, e.g.: "perf stat -e '{cycles,instructions}'" (Jiri Olsa)

  pipe mode improvements:

   - Process tracing data in 'perf annotate' pipe mode (David
     Carrillo-Cisneros)

   - Add header record types to pipe-mode, now this command:

        $ perf record -o - -e cycles sleep 1 | perf report --stdio --header

     Will show the same as in non-pipe mode, i.e. involving a perf.data
     file (David Carrillo-Cisneros)

  Vendor specific hardware event support updates/enhancements:

   - Update POWER9 vendor events tables (Sukadev Bhattiprolu)

   - Add POWER9 PMU events Sukadev (Bhattiprolu)

   - Support additional POWER8+ PVR in PMU mapfile (Shriya)

   - Add Skylake server uncore JSON vendor events (Andi Kleen)

   - Support exporting Intel PT data to sqlite3 with python perf
     scripts, this is in addition to the postgresql support that was
     already there (Adrian Hunter)"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (253 commits)
  perf symbols: Fix plt entry calculation for ARM and AARCH64
  perf probe: Fix kprobe blacklist checking condition
  perf/x86: Fix caps/ for !Intel
  perf/core, x86: Add PERF_SAMPLE_PHYS_ADDR
  perf/core, pt, bts: Get rid of itrace_started
  perf trace beauty: Beautify pkey_{alloc,free,mprotect} arguments
  tools headers: Sync cpu features kernel ABI headers with tooling headers
  perf tools: Pass full path of FEATURES_DUMP
  perf tools: Robustify detection of clang binary
  tools lib: Allow external definition of CC, AR and LD
  perf tools: Allow external definition of flex and bison binary names
  tools build tests: Don't hardcode gcc name
  perf report: Group stat values on global event id
  perf values: Zero value buffers
  perf values: Fix allocation check
  perf values: Fix thread index bug
  perf report: Add dump_read function
  perf record: Set read_format for inherit_stat
  perf c2c: Fix remote HITM detection for Skylake
  perf tools: Fix static build with newer toolchains
  ...

1 files changed, 95 insertions, 18 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index e7a98db..5909ee4 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -18,6 +18,7 @@
 #include "symbol.h"
 #include "strlist.h"
 #include "intlist.h"
+#include "namespaces.h"
 #include "header.h"
 #include "path.h"
 #include "sane_ctype.h"
@@ -52,6 +53,7 @@ static enum dso_binary_type binary_type_symtab[] = {
 	DSO_BINARY_TYPE__JAVA_JIT,
 	DSO_BINARY_TYPE__DEBUGLINK,
 	DSO_BINARY_TYPE__BUILD_ID_CACHE,
+	DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
 	DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
 	DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
 	DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
@@ -231,7 +233,8 @@ void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
 		goto out_unlock;
 
 	for (next = map__next(curr); next; next = map__next(curr)) {
-		curr->end = next->start;
+		if (!curr->end)
+			curr->end = next->start;
 		curr = next;
 	}
 
@@ -239,7 +242,8 @@ void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
 	 * We still haven't the actual symbols, so guess the
 	 * last map final address.
 	 */
-	curr->end = ~0ULL;
+	if (!curr->end)
+		curr->end = ~0ULL;
 
 out_unlock:
 	pthread_rwlock_unlock(&maps->lock);
@@ -550,7 +554,7 @@ void dso__sort_by_name(struct dso *dso, enum map_type type)
 
 int modules__parse(const char *filename, void *arg,
 		   int (*process_module)(void *arg, const char *name,
-					 u64 start))
+					 u64 start, u64 size))
 {
 	char *line = NULL;
 	size_t n;
@@ -563,8 +567,8 @@ int modules__parse(const char *filename, void *arg,
 
 	while (1) {
 		char name[PATH_MAX];
-		u64 start;
-		char *sep;
+		u64 start, size;
+		char *sep, *endptr;
 		ssize_t line_len;
 
 		line_len = getline(&line, &n, file);
@@ -596,7 +600,11 @@ int modules__parse(const char *filename, void *arg,
 
 		scnprintf(name, sizeof(name), "[%s]", line);
 
-		err = process_module(arg, name, start);
+		size = strtoul(sep + 1, &endptr, 0);
+		if (*endptr != ' ' && *endptr != '\t')
+			continue;
+
+		err = process_module(arg, name, start, size);
 		if (err)
 			break;
 	}
@@ -943,7 +951,8 @@ static struct module_info *find_module(const char *name,
 	return NULL;
 }
 
-static int __read_proc_modules(void *arg, const char *name, u64 start)
+static int __read_proc_modules(void *arg, const char *name, u64 start,
+			       u64 size __maybe_unused)
 {
 	struct rb_root *modules = arg;
 	struct module_info *mi;
@@ -1325,14 +1334,15 @@ int dso__load_kallsyms(struct dso *dso, const char *filename,
 	return __dso__load_kallsyms(dso, filename, map, false);
 }
 
-static int dso__load_perf_map(struct dso *dso, struct map *map)
+static int dso__load_perf_map(const char *map_path, struct dso *dso,
+			      struct map *map)
 {
 	char *line = NULL;
 	size_t n;
 	FILE *file;
 	int nr_syms = 0;
 
-	file = fopen(dso->long_name, "r");
+	file = fopen(map_path, "r");
 	if (file == NULL)
 		goto out_failure;
 
@@ -1416,6 +1426,7 @@ static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
 		return kmod && dso->symtab_type == type;
 
 	case DSO_BINARY_TYPE__BUILD_ID_CACHE:
+	case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
 		return true;
 
 	case DSO_BINARY_TYPE__NOT_FOUND:
@@ -1424,6 +1435,44 @@ static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
 	}
 }
 
+/* Checks for the existence of the perf-<pid>.map file in two different
+ * locations.  First, if the process is a separate mount namespace, check in
+ * that namespace using the pid of the innermost pid namespace.  If's not in a
+ * namespace, or the file can't be found there, try in the mount namespace of
+ * the tracing process using our view of its pid.
+ */
+static int dso__find_perf_map(char *filebuf, size_t bufsz,
+			      struct nsinfo **nsip)
+{
+	struct nscookie nsc;
+	struct nsinfo *nsi;
+	struct nsinfo *nnsi;
+	int rc = -1;
+
+	nsi = *nsip;
+
+	if (nsi->need_setns) {
+		snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid);
+		nsinfo__mountns_enter(nsi, &nsc);
+		rc = access(filebuf, R_OK);
+		nsinfo__mountns_exit(&nsc);
+		if (rc == 0)
+			return rc;
+	}
+
+	nnsi = nsinfo__copy(nsi);
+	if (nnsi) {
+		nsinfo__put(nsi);
+
+		nnsi->need_setns = false;
+		snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid);
+		*nsip = nnsi;
+		rc = 0;
+	}
+
+	return rc;
+}
+
 int dso__load(struct dso *dso, struct map *map)
 {
 	char *name;
@@ -1435,8 +1484,21 @@ int dso__load(struct dso *dso, struct map *map)
 	struct symsrc ss_[2];
 	struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
 	bool kmod;
+	bool perfmap;
 	unsigned char build_id[BUILD_ID_SIZE];
+	struct nscookie nsc;
+	char newmapname[PATH_MAX];
+	const char *map_path = dso->long_name;
+
+	perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0;
+	if (perfmap) {
+		if (dso->nsinfo && (dso__find_perf_map(newmapname,
+		    sizeof(newmapname), &dso->nsinfo) == 0)) {
+			map_path = newmapname;
+		}
+	}
 
+	nsinfo__mountns_enter(dso->nsinfo, &nsc);
 	pthread_mutex_lock(&dso->lock);
 
 	/* check again under the dso->lock */
@@ -1461,19 +1523,19 @@ int dso__load(struct dso *dso, struct map *map)
 
 	dso->adjust_symbols = 0;
 
-	if (strncmp(dso->name, "/tmp/perf-", 10) == 0) {
+	if (perfmap) {
 		struct stat st;
 
-		if (lstat(dso->name, &st) < 0)
+		if (lstat(map_path, &st) < 0)
 			goto out;
 
 		if (!symbol_conf.force && st.st_uid && (st.st_uid != geteuid())) {
 			pr_warning("File %s not owned by current user or root, "
-				   "ignoring it (use -f to override).\n", dso->name);
+				   "ignoring it (use -f to override).\n", map_path);
 			goto out;
 		}
 
-		ret = dso__load_perf_map(dso, map);
+		ret = dso__load_perf_map(map_path, dso, map);
 		dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
 					     DSO_BINARY_TYPE__NOT_FOUND;
 		goto out;
@@ -1511,9 +1573,15 @@ int dso__load(struct dso *dso, struct map *map)
 	for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
 		struct symsrc *ss = &ss_[ss_pos];
 		bool next_slot = false;
+		bool is_reg;
+		bool nsexit;
+		int sirc;
 
 		enum dso_binary_type symtab_type = binary_type_symtab[i];
 
+		nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE ||
+		    symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO);
+
 		if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
 			continue;
 
@@ -1521,12 +1589,20 @@ int dso__load(struct dso *dso, struct map *map)
 						   root_dir, name, PATH_MAX))
 			continue;
 
-		if (!is_regular_file(name))
-			continue;
+		if (nsexit)
+			nsinfo__mountns_exit(&nsc);
+
+		is_reg = is_regular_file(name);
+		sirc = symsrc__init(ss, dso, name, symtab_type);
 
-		/* Name is now the name of the next image to try */
-		if (symsrc__init(ss, dso, name, symtab_type) < 0)
+		if (nsexit)
+			nsinfo__mountns_enter(dso->nsinfo, &nsc);
+
+		if (!is_reg || sirc < 0) {
+			if (sirc >= 0)
+				symsrc__destroy(ss);
 			continue;
+		}
 
 		if (!syms_ss && symsrc__has_symtab(ss)) {
 			syms_ss = ss;
@@ -1584,6 +1660,7 @@ out_free:
 out:
 	dso__set_loaded(dso, map->type);
 	pthread_mutex_unlock(&dso->lock);
+	nsinfo__mountns_exit(&nsc);
 
 	return ret;
 }
@@ -1660,7 +1737,7 @@ int dso__load_vmlinux_path(struct dso *dso, struct map *map)
 	}
 
 	if (!symbol_conf.ignore_vmlinux_buildid)
-		filename = dso__build_id_filename(dso, NULL, 0);
+		filename = dso__build_id_filename(dso, NULL, 0, false);
 	if (filename != NULL) {
 		err = dso__load_vmlinux(dso, map, filename, true);
 		if (err > 0)