v4.19.13 snapshot.
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
new file mode 100644
index 0000000..22ab8e6
--- /dev/null
+++ b/tools/perf/builtin-trace.c
@@ -0,0 +1,3376 @@
+/*
+ * builtin-trace.c
+ *
+ * Builtin 'trace' command:
+ *
+ * Display a continuously updated trace of any workload, CPU, specific PID,
+ * system wide, etc. Default format is loosely strace like, but any other
+ * event may be specified using --event.
+ *
+ * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+ *
+ * Initially based on the 'trace' prototype by Thomas Gleixner:
+ *
+ * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
+#include <traceevent/event-parse.h>
+#include <api/fs/tracing_path.h>
+#include "builtin.h"
+#include "util/cgroup.h"
+#include "util/color.h"
+#include "util/debug.h"
+#include "util/env.h"
+#include "util/event.h"
+#include "util/evlist.h"
+#include <subcmd/exec-cmd.h>
+#include "util/machine.h"
+#include "util/path.h"
+#include "util/session.h"
+#include "util/thread.h"
+#include <subcmd/parse-options.h>
+#include "util/strlist.h"
+#include "util/intlist.h"
+#include "util/thread_map.h"
+#include "util/stat.h"
+#include "trace/beauty/beauty.h"
+#include "trace-event.h"
+#include "util/parse-events.h"
+#include "util/bpf-loader.h"
+#include "callchain.h"
+#include "print_binary.h"
+#include "string2.h"
+#include "syscalltbl.h"
+#include "rb_resort.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/err.h>
+#include <linux/filter.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/stringify.h>
+#include <linux/time64.h>
+#include <fcntl.h>
+
+#include "sane_ctype.h"
+
+#ifndef O_CLOEXEC
+# define O_CLOEXEC 02000000
+#endif
+
+#ifndef F_LINUX_SPECIFIC_BASE
+# define F_LINUX_SPECIFIC_BASE 1024
+#endif
+
+struct trace {
+ struct perf_tool tool;
+ struct syscalltbl *sctbl;
+ struct {
+ int max;
+ struct syscall *table;
+ struct {
+ struct perf_evsel *sys_enter,
+ *sys_exit,
+ *augmented;
+ } events;
+ } syscalls;
+ struct record_opts opts;
+ struct perf_evlist *evlist;
+ struct machine *host;
+ struct thread *current;
+ struct cgroup *cgroup;
+ u64 base_time;
+ FILE *output;
+ unsigned long nr_events;
+ struct strlist *ev_qualifier;
+ struct {
+ size_t nr;
+ int *entries;
+ } ev_qualifier_ids;
+ struct {
+ size_t nr;
+ pid_t *entries;
+ } filter_pids;
+ double duration_filter;
+ double runtime_ms;
+ struct {
+ u64 vfs_getname,
+ proc_getname;
+ } stats;
+ unsigned int max_stack;
+ unsigned int min_stack;
+ bool not_ev_qualifier;
+ bool live;
+ bool full_time;
+ bool sched;
+ bool multiple_threads;
+ bool summary;
+ bool summary_only;
+ bool failure_only;
+ bool show_comm;
+ bool print_sample;
+ bool show_tool_stats;
+ bool trace_syscalls;
+ bool kernel_syscallchains;
+ bool force;
+ bool vfs_getname;
+ int trace_pgfaults;
+};
+
+struct tp_field {
+ int offset;
+ union {
+ u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
+ void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
+ };
+};
+
+#define TP_UINT_FIELD(bits) \
+static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
+{ \
+ u##bits value; \
+ memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
+ return value; \
+}
+
+TP_UINT_FIELD(8);
+TP_UINT_FIELD(16);
+TP_UINT_FIELD(32);
+TP_UINT_FIELD(64);
+
+#define TP_UINT_FIELD__SWAPPED(bits) \
+static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
+{ \
+ u##bits value; \
+ memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
+ return bswap_##bits(value);\
+}
+
+TP_UINT_FIELD__SWAPPED(16);
+TP_UINT_FIELD__SWAPPED(32);
+TP_UINT_FIELD__SWAPPED(64);
+
+static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
+{
+ field->offset = offset;
+
+ switch (size) {
+ case 1:
+ field->integer = tp_field__u8;
+ break;
+ case 2:
+ field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
+ break;
+ case 4:
+ field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
+ break;
+ case 8:
+ field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int tp_field__init_uint(struct tp_field *field, struct format_field *format_field, bool needs_swap)
+{
+ return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
+}
+
+static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
+{
+ return sample->raw_data + field->offset;
+}
+
+static int __tp_field__init_ptr(struct tp_field *field, int offset)
+{
+ field->offset = offset;
+ field->pointer = tp_field__ptr;
+ return 0;
+}
+
+static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
+{
+ return __tp_field__init_ptr(field, format_field->offset);
+}
+
+struct syscall_tp {
+ struct tp_field id;
+ union {
+ struct tp_field args, ret;
+ };
+};
+
+static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
+ struct tp_field *field,
+ const char *name)
+{
+ struct format_field *format_field = perf_evsel__field(evsel, name);
+
+ if (format_field == NULL)
+ return -1;
+
+ return tp_field__init_uint(field, format_field, evsel->needs_swap);
+}
+
+#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
+ ({ struct syscall_tp *sc = evsel->priv;\
+ perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
+
+static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
+ struct tp_field *field,
+ const char *name)
+{
+ struct format_field *format_field = perf_evsel__field(evsel, name);
+
+ if (format_field == NULL)
+ return -1;
+
+ return tp_field__init_ptr(field, format_field);
+}
+
+#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
+ ({ struct syscall_tp *sc = evsel->priv;\
+ perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
+
+static void perf_evsel__delete_priv(struct perf_evsel *evsel)
+{
+ zfree(&evsel->priv);
+ perf_evsel__delete(evsel);
+}
+
+static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel)
+{
+ struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
+
+ if (evsel->priv != NULL) {
+ if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr"))
+ goto out_delete;
+ return 0;
+ }
+
+ return -ENOMEM;
+out_delete:
+ zfree(&evsel->priv);
+ return -ENOENT;
+}
+
+static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel)
+{
+ struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
+
+ if (evsel->priv != NULL) { /* field, sizeof_field, offsetof_field */
+ if (__tp_field__init_uint(&sc->id, sizeof(long), sizeof(long long), evsel->needs_swap))
+ goto out_delete;
+
+ return 0;
+ }
+
+ return -ENOMEM;
+out_delete:
+ zfree(&evsel->priv);
+ return -EINVAL;
+}
+
+static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel)
+{
+ struct syscall_tp *sc = evsel->priv;
+
+ return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
+}
+
+static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler)
+{
+ evsel->priv = malloc(sizeof(struct syscall_tp));
+ if (evsel->priv != NULL) {
+ if (perf_evsel__init_sc_tp_uint_field(evsel, id))
+ goto out_delete;
+
+ evsel->handler = handler;
+ return 0;
+ }
+
+ return -ENOMEM;
+
+out_delete:
+ zfree(&evsel->priv);
+ return -ENOENT;
+}
+
+static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
+{
+ struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
+
+ /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
+ if (IS_ERR(evsel))
+ evsel = perf_evsel__newtp("syscalls", direction);
+
+ if (IS_ERR(evsel))
+ return NULL;
+
+ if (perf_evsel__init_raw_syscall_tp(evsel, handler))
+ goto out_delete;
+
+ return evsel;
+
+out_delete:
+ perf_evsel__delete_priv(evsel);
+ return NULL;
+}
+
+#define perf_evsel__sc_tp_uint(evsel, name, sample) \
+ ({ struct syscall_tp *fields = evsel->priv; \
+ fields->name.integer(&fields->name, sample); })
+
+#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
+ ({ struct syscall_tp *fields = evsel->priv; \
+ fields->name.pointer(&fields->name, sample); })
+
+size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, int val)
+{
+ int idx = val - sa->offset;
+
+ if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL)
+ return scnprintf(bf, size, intfmt, val);
+
+ return scnprintf(bf, size, "%s", sa->entries[idx]);
+}
+
+static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
+ const char *intfmt,
+ struct syscall_arg *arg)
+{
+ return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->val);
+}
+
+static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
+}
+
+#define SCA_STRARRAY syscall_arg__scnprintf_strarray
+
+struct strarrays {
+ int nr_entries;
+ struct strarray **entries;
+};
+
+#define DEFINE_STRARRAYS(array) struct strarrays strarrays__##array = { \
+ .nr_entries = ARRAY_SIZE(array), \
+ .entries = array, \
+}
+
+size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ struct strarrays *sas = arg->parm;
+ int i;
+
+ for (i = 0; i < sas->nr_entries; ++i) {
+ struct strarray *sa = sas->entries[i];
+ int idx = arg->val - sa->offset;
+
+ if (idx >= 0 && idx < sa->nr_entries) {
+ if (sa->entries[idx] == NULL)
+ break;
+ return scnprintf(bf, size, "%s", sa->entries[idx]);
+ }
+ }
+
+ return scnprintf(bf, size, "%d", arg->val);
+}
+
+#ifndef AT_FDCWD
+#define AT_FDCWD -100
+#endif
+
+static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ int fd = arg->val;
+
+ if (fd == AT_FDCWD)
+ return scnprintf(bf, size, "CWD");
+
+ return syscall_arg__scnprintf_fd(bf, size, arg);
+}
+
+#define SCA_FDAT syscall_arg__scnprintf_fd_at
+
+static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
+ struct syscall_arg *arg);
+
+#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
+
+size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
+{
+ return scnprintf(bf, size, "%#lx", arg->val);
+}
+
+size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
+{
+ return scnprintf(bf, size, "%d", arg->val);
+}
+
+size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
+{
+ return scnprintf(bf, size, "%ld", arg->val);
+}
+
+static const char *bpf_cmd[] = {
+ "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
+ "MAP_GET_NEXT_KEY", "PROG_LOAD",
+};
+static DEFINE_STRARRAY(bpf_cmd);
+
+static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
+static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
+
+static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
+static DEFINE_STRARRAY(itimers);
+
+static const char *keyctl_options[] = {
+ "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
+ "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
+ "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
+ "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
+ "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
+};
+static DEFINE_STRARRAY(keyctl_options);
+
+static const char *whences[] = { "SET", "CUR", "END",
+#ifdef SEEK_DATA
+"DATA",
+#endif
+#ifdef SEEK_HOLE
+"HOLE",
+#endif
+};
+static DEFINE_STRARRAY(whences);
+
+static const char *fcntl_cmds[] = {
+ "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
+ "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
+ "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
+ "GETOWNER_UIDS",
+};
+static DEFINE_STRARRAY(fcntl_cmds);
+
+static const char *fcntl_linux_specific_cmds[] = {
+ "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
+ "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
+ "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
+};
+
+static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, F_LINUX_SPECIFIC_BASE);
+
+static struct strarray *fcntl_cmds_arrays[] = {
+ &strarray__fcntl_cmds,
+ &strarray__fcntl_linux_specific_cmds,
+};
+
+static DEFINE_STRARRAYS(fcntl_cmds_arrays);
+
+static const char *rlimit_resources[] = {
+ "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
+ "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
+ "RTTIME",
+};
+static DEFINE_STRARRAY(rlimit_resources);
+
+static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
+static DEFINE_STRARRAY(sighow);
+
+static const char *clockid[] = {
+ "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
+ "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
+ "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
+};
+static DEFINE_STRARRAY(clockid);
+
+static const char *socket_families[] = {
+ "UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
+ "BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
+ "SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
+ "RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
+ "BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
+ "ALG", "NFC", "VSOCK",
+};
+static DEFINE_STRARRAY(socket_families);
+
+static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ size_t printed = 0;
+ int mode = arg->val;
+
+ if (mode == F_OK) /* 0 */
+ return scnprintf(bf, size, "F");
+#define P_MODE(n) \
+ if (mode & n##_OK) { \
+ printed += scnprintf(bf + printed, size - printed, "%s", #n); \
+ mode &= ~n##_OK; \
+ }
+
+ P_MODE(R);
+ P_MODE(W);
+ P_MODE(X);
+#undef P_MODE
+
+ if (mode)
+ printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
+
+ return printed;
+}
+
+#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
+
+static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
+ struct syscall_arg *arg);
+
+#define SCA_FILENAME syscall_arg__scnprintf_filename
+
+static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ int printed = 0, flags = arg->val;
+
+#define P_FLAG(n) \
+ if (flags & O_##n) { \
+ printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+ flags &= ~O_##n; \
+ }
+
+ P_FLAG(CLOEXEC);
+ P_FLAG(NONBLOCK);
+#undef P_FLAG
+
+ if (flags)
+ printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
+
+ return printed;
+}
+
+#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
+
+#ifndef GRND_NONBLOCK
+#define GRND_NONBLOCK 0x0001
+#endif
+#ifndef GRND_RANDOM
+#define GRND_RANDOM 0x0002
+#endif
+
+static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ int printed = 0, flags = arg->val;
+
+#define P_FLAG(n) \
+ if (flags & GRND_##n) { \
+ printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+ flags &= ~GRND_##n; \
+ }
+
+ P_FLAG(RANDOM);
+ P_FLAG(NONBLOCK);
+#undef P_FLAG
+
+ if (flags)
+ printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
+
+ return printed;
+}
+
+#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
+
+#define STRARRAY(name, array) \
+ { .scnprintf = SCA_STRARRAY, \
+ .parm = &strarray__##array, }
+
+#include "trace/beauty/arch_errno_names.c"
+#include "trace/beauty/eventfd.c"
+#include "trace/beauty/futex_op.c"
+#include "trace/beauty/futex_val3.c"
+#include "trace/beauty/mmap.c"
+#include "trace/beauty/mode_t.c"
+#include "trace/beauty/msg_flags.c"
+#include "trace/beauty/open_flags.c"
+#include "trace/beauty/perf_event_open.c"
+#include "trace/beauty/pid.c"
+#include "trace/beauty/sched_policy.c"
+#include "trace/beauty/seccomp.c"
+#include "trace/beauty/signum.c"
+#include "trace/beauty/socket_type.c"
+#include "trace/beauty/waitid_options.c"
+
+struct syscall_arg_fmt {
+ size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
+ void *parm;
+ const char *name;
+ bool show_zero;
+};
+
+static struct syscall_fmt {
+ const char *name;
+ const char *alias;
+ struct syscall_arg_fmt arg[6];
+ u8 nr_args;
+ bool errpid;
+ bool timeout;
+ bool hexret;
+} syscall_fmts[] = {
+ { .name = "access",
+ .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
+ { .name = "bpf",
+ .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
+ { .name = "brk", .hexret = true,
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, },
+ { .name = "clock_gettime",
+ .arg = { [0] = STRARRAY(clk_id, clockid), }, },
+ { .name = "clone", .errpid = true, .nr_args = 5,
+ .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
+ [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
+ [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
+ [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
+ [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
+ { .name = "close",
+ .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
+ { .name = "epoll_ctl",
+ .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
+ { .name = "eventfd2",
+ .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
+ { .name = "fchmodat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "fchownat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "fcntl",
+ .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
+ .parm = &strarrays__fcntl_cmds_arrays,
+ .show_zero = true, },
+ [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
+ { .name = "flock",
+ .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
+ { .name = "fstat", .alias = "newfstat", },
+ { .name = "fstatat", .alias = "newfstatat", },
+ { .name = "futex",
+ .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
+ [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
+ { .name = "futimesat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "getitimer",
+ .arg = { [0] = STRARRAY(which, itimers), }, },
+ { .name = "getpid", .errpid = true, },
+ { .name = "getpgid", .errpid = true, },
+ { .name = "getppid", .errpid = true, },
+ { .name = "getrandom",
+ .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
+ { .name = "getrlimit",
+ .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
+ { .name = "gettid", .errpid = true, },
+ { .name = "ioctl",
+ .arg = {
+#if defined(__i386__) || defined(__x86_64__)
+/*
+ * FIXME: Make this available to all arches.
+ */
+ [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
+ [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
+#else
+ [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
+#endif
+ { .name = "kcmp", .nr_args = 5,
+ .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
+ [1] = { .name = "pid2", .scnprintf = SCA_PID, },
+ [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
+ [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
+ [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
+ { .name = "keyctl",
+ .arg = { [0] = STRARRAY(option, keyctl_options), }, },
+ { .name = "kill",
+ .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "linkat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "lseek",
+ .arg = { [2] = STRARRAY(whence, whences), }, },
+ { .name = "lstat", .alias = "newlstat", },
+ { .name = "madvise",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
+ [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
+ { .name = "mkdirat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "mknodat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+ { .name = "mlock",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+ { .name = "mlockall",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+ { .name = "mmap", .hexret = true,
+/* The standard mmap maps to old_mmap on s390x */
+#if defined(__s390x__)
+ .alias = "old_mmap",
+#endif
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
+ [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
+ [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
+ { .name = "mprotect",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
+ [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
+ { .name = "mq_unlink",
+ .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
+ { .name = "mremap", .hexret = true,
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
+ [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ },
+ [4] = { .scnprintf = SCA_HEX, /* new_addr */ }, }, },
+ { .name = "munlock",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+ { .name = "munmap",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+ { .name = "name_to_handle_at",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "newfstatat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "open",
+ .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+ { .name = "open_by_handle_at",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
+ [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+ { .name = "openat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
+ [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+ { .name = "perf_event_open",
+ .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
+ [3] = { .scnprintf = SCA_FD, /* group_fd */ },
+ [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
+ { .name = "pipe2",
+ .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
+ { .name = "pkey_alloc",
+ .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
+ { .name = "pkey_free",
+ .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
+ { .name = "pkey_mprotect",
+ .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
+ [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
+ [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
+ { .name = "poll", .timeout = true, },
+ { .name = "ppoll", .timeout = true, },
+ { .name = "prctl", .alias = "arch_prctl",
+ .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
+ [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
+ [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
+ { .name = "pread", .alias = "pread64", },
+ { .name = "preadv", .alias = "pread", },
+ { .name = "prlimit64",
+ .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
+ { .name = "pwrite", .alias = "pwrite64", },
+ { .name = "readlinkat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "recvfrom",
+ .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "recvmmsg",
+ .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "recvmsg",
+ .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "renameat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "rt_sigaction",
+ .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "rt_sigprocmask",
+ .arg = { [0] = STRARRAY(how, sighow), }, },
+ { .name = "rt_sigqueueinfo",
+ .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "rt_tgsigqueueinfo",
+ .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "sched_setscheduler",
+ .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
+ { .name = "seccomp",
+ .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
+ [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
+ { .name = "select", .timeout = true, },
+ { .name = "sendmmsg",
+ .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "sendmsg",
+ .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "sendto",
+ .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+ { .name = "set_tid_address", .errpid = true, },
+ { .name = "setitimer",
+ .arg = { [0] = STRARRAY(which, itimers), }, },
+ { .name = "setrlimit",
+ .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
+ { .name = "socket",
+ .arg = { [0] = STRARRAY(family, socket_families),
+ [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
+ [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
+ { .name = "socketpair",
+ .arg = { [0] = STRARRAY(family, socket_families),
+ [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
+ [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
+ { .name = "stat", .alias = "newstat", },
+ { .name = "statx",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
+ [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
+ [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
+ { .name = "swapoff",
+ .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
+ { .name = "swapon",
+ .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
+ { .name = "symlinkat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "tgkill",
+ .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "tkill",
+ .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+ { .name = "uname", .alias = "newuname", },
+ { .name = "unlinkat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "utimensat",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
+ { .name = "wait4", .errpid = true,
+ .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
+ { .name = "waitid", .errpid = true,
+ .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
+};
+
+static int syscall_fmt__cmp(const void *name, const void *fmtp)
+{
+ const struct syscall_fmt *fmt = fmtp;
+ return strcmp(name, fmt->name);
+}
+
+static struct syscall_fmt *syscall_fmt__find(const char *name)
+{
+ const int nmemb = ARRAY_SIZE(syscall_fmts);
+ return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
+}
+
+/*
+ * is_exit: is this "exit" or "exit_group"?
+ * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
+ */
+struct syscall {
+ struct event_format *tp_format;
+ int nr_args;
+ bool is_exit;
+ bool is_open;
+ struct format_field *args;
+ const char *name;
+ struct syscall_fmt *fmt;
+ struct syscall_arg_fmt *arg_fmt;
+};
+
+/*
+ * We need to have this 'calculated' boolean because in some cases we really
+ * don't know what is the duration of a syscall, for instance, when we start
+ * a session and some threads are waiting for a syscall to finish, say 'poll',
+ * in which case all we can do is to print "( ? ) for duration and for the
+ * start timestamp.
+ */
+static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
+{
+ double duration = (double)t / NSEC_PER_MSEC;
+ size_t printed = fprintf(fp, "(");
+
+ if (!calculated)
+ printed += fprintf(fp, " ");
+ else if (duration >= 1.0)
+ printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
+ else if (duration >= 0.01)
+ printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
+ else
+ printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
+ return printed + fprintf(fp, "): ");
+}
+
+/**
+ * filename.ptr: The filename char pointer that will be vfs_getname'd
+ * filename.entry_str_pos: Where to insert the string translated from
+ * filename.ptr by the vfs_getname tracepoint/kprobe.
+ * ret_scnprintf: syscall args may set this to a different syscall return
+ * formatter, for instance, fcntl may return fds, file flags, etc.
+ */
+struct thread_trace {
+ u64 entry_time;
+ bool entry_pending;
+ unsigned long nr_events;
+ unsigned long pfmaj, pfmin;
+ char *entry_str;
+ double runtime_ms;
+ size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
+ struct {
+ unsigned long ptr;
+ short int entry_str_pos;
+ bool pending_open;
+ unsigned int namelen;
+ char *name;
+ } filename;
+ struct {
+ int max;
+ char **table;
+ } paths;
+
+ struct intlist *syscall_stats;
+};
+
+static struct thread_trace *thread_trace__new(void)
+{
+ struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
+
+ if (ttrace)
+ ttrace->paths.max = -1;
+
+ ttrace->syscall_stats = intlist__new(NULL);
+
+ return ttrace;
+}
+
+static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
+{
+ struct thread_trace *ttrace;
+
+ if (thread == NULL)
+ goto fail;
+
+ if (thread__priv(thread) == NULL)
+ thread__set_priv(thread, thread_trace__new());
+
+ if (thread__priv(thread) == NULL)
+ goto fail;
+
+ ttrace = thread__priv(thread);
+ ++ttrace->nr_events;
+
+ return ttrace;
+fail:
+ color_fprintf(fp, PERF_COLOR_RED,
+ "WARNING: not enough memory, dropping samples!\n");
+ return NULL;
+}
+
+
+void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
+ size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
+{
+ struct thread_trace *ttrace = thread__priv(arg->thread);
+
+ ttrace->ret_scnprintf = ret_scnprintf;
+}
+
+#define TRACE_PFMAJ (1 << 0)
+#define TRACE_PFMIN (1 << 1)
+
+static const size_t trace__entry_str_size = 2048;
+
+static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
+{
+ struct thread_trace *ttrace = thread__priv(thread);
+
+ if (fd > ttrace->paths.max) {
+ char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
+
+ if (npath == NULL)
+ return -1;
+
+ if (ttrace->paths.max != -1) {
+ memset(npath + ttrace->paths.max + 1, 0,
+ (fd - ttrace->paths.max) * sizeof(char *));
+ } else {
+ memset(npath, 0, (fd + 1) * sizeof(char *));
+ }
+
+ ttrace->paths.table = npath;
+ ttrace->paths.max = fd;
+ }
+
+ ttrace->paths.table[fd] = strdup(pathname);
+
+ return ttrace->paths.table[fd] != NULL ? 0 : -1;
+}
+
+static int thread__read_fd_path(struct thread *thread, int fd)
+{
+ char linkname[PATH_MAX], pathname[PATH_MAX];
+ struct stat st;
+ int ret;
+
+ if (thread->pid_ == thread->tid) {
+ scnprintf(linkname, sizeof(linkname),
+ "/proc/%d/fd/%d", thread->pid_, fd);
+ } else {
+ scnprintf(linkname, sizeof(linkname),
+ "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
+ }
+
+ if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
+ return -1;
+
+ ret = readlink(linkname, pathname, sizeof(pathname));
+
+ if (ret < 0 || ret > st.st_size)
+ return -1;
+
+ pathname[ret] = '\0';
+ return trace__set_fd_pathname(thread, fd, pathname);
+}
+
+static const char *thread__fd_path(struct thread *thread, int fd,
+ struct trace *trace)
+{
+ struct thread_trace *ttrace = thread__priv(thread);
+
+ if (ttrace == NULL)
+ return NULL;
+
+ if (fd < 0)
+ return NULL;
+
+ if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
+ if (!trace->live)
+ return NULL;
+ ++trace->stats.proc_getname;
+ if (thread__read_fd_path(thread, fd))
+ return NULL;
+ }
+
+ return ttrace->paths.table[fd];
+}
+
+size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
+{
+ int fd = arg->val;
+ size_t printed = scnprintf(bf, size, "%d", fd);
+ const char *path = thread__fd_path(arg->thread, fd, arg->trace);
+
+ if (path)
+ printed += scnprintf(bf + printed, size - printed, "<%s>", path);
+
+ return printed;
+}
+
+size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
+{
+ size_t printed = scnprintf(bf, size, "%d", fd);
+ struct thread *thread = machine__find_thread(trace->host, pid, pid);
+
+ if (thread) {
+ const char *path = thread__fd_path(thread, fd, trace);
+
+ if (path)
+ printed += scnprintf(bf + printed, size - printed, "<%s>", path);
+
+ thread__put(thread);
+ }
+
+ return printed;
+}
+
+static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ int fd = arg->val;
+ size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
+ struct thread_trace *ttrace = thread__priv(arg->thread);
+
+ if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
+ zfree(&ttrace->paths.table[fd]);
+
+ return printed;
+}
+
+static void thread__set_filename_pos(struct thread *thread, const char *bf,
+ unsigned long ptr)
+{
+ struct thread_trace *ttrace = thread__priv(thread);
+
+ ttrace->filename.ptr = ptr;
+ ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
+}
+
+static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ unsigned long ptr = arg->val;
+
+ if (!arg->trace->vfs_getname)
+ return scnprintf(bf, size, "%#x", ptr);
+
+ thread__set_filename_pos(arg->thread, bf, ptr);
+ return 0;
+}
+
+static bool trace__filter_duration(struct trace *trace, double t)
+{
+ return t < (trace->duration_filter * NSEC_PER_MSEC);
+}
+
+static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
+{
+ double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
+
+ return fprintf(fp, "%10.3f ", ts);
+}
+
+/*
+ * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
+ * using ttrace->entry_time for a thread that receives a sys_exit without
+ * first having received a sys_enter ("poll" issued before tracing session
+ * starts, lost sys_enter exit due to ring buffer overflow).
+ */
+static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
+{
+ if (tstamp > 0)
+ return __trace__fprintf_tstamp(trace, tstamp, fp);
+
+ return fprintf(fp, " ? ");
+}
+
+static bool done = false;
+static bool interrupted = false;
+
+static void sig_handler(int sig)
+{
+ done = true;
+ interrupted = sig == SIGINT;
+}
+
+static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
+ u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
+{
+ size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
+ printed += fprintf_duration(duration, duration_calculated, fp);
+
+ if (trace->multiple_threads) {
+ if (trace->show_comm)
+ printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
+ printed += fprintf(fp, "%d ", thread->tid);
+ }
+
+ return printed;
+}
+
+static int trace__process_event(struct trace *trace, struct machine *machine,
+ union perf_event *event, struct perf_sample *sample)
+{
+ int ret = 0;
+
+ switch (event->header.type) {
+ case PERF_RECORD_LOST:
+ color_fprintf(trace->output, PERF_COLOR_RED,
+ "LOST %" PRIu64 " events!\n", event->lost.lost);
+ ret = machine__process_lost_event(machine, event, sample);
+ break;
+ default:
+ ret = machine__process_event(machine, event, sample);
+ break;
+ }
+
+ return ret;
+}
+
+static int trace__tool_process(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct trace *trace = container_of(tool, struct trace, tool);
+ return trace__process_event(trace, machine, event, sample);
+}
+
+static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
+{
+ struct machine *machine = vmachine;
+
+ if (machine->kptr_restrict_warned)
+ return NULL;
+
+ if (symbol_conf.kptr_restrict) {
+ pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
+ "Check /proc/sys/kernel/kptr_restrict.\n\n"
+ "Kernel samples will not be resolved.\n");
+ machine->kptr_restrict_warned = true;
+ return NULL;
+ }
+
+ return machine__resolve_kernel_addr(vmachine, addrp, modp);
+}
+
+static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
+{
+ int err = symbol__init(NULL);
+
+ if (err)
+ return err;
+
+ trace->host = machine__new_host();
+ if (trace->host == NULL)
+ return -ENOMEM;
+
+ err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
+ if (err < 0)
+ goto out;
+
+ err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
+ evlist->threads, trace__tool_process, false,
+ trace->opts.proc_map_timeout, 1);
+out:
+ if (err)
+ symbol__exit();
+
+ return err;
+}
+
+static void trace__symbols__exit(struct trace *trace)
+{
+ machine__exit(trace->host);
+ trace->host = NULL;
+
+ symbol__exit();
+}
+
+static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
+{
+ int idx;
+
+ if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
+ nr_args = sc->fmt->nr_args;
+
+ sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
+ if (sc->arg_fmt == NULL)
+ return -1;
+
+ for (idx = 0; idx < nr_args; ++idx) {
+ if (sc->fmt)
+ sc->arg_fmt[idx] = sc->fmt->arg[idx];
+ }
+
+ sc->nr_args = nr_args;
+ return 0;
+}
+
+static int syscall__set_arg_fmts(struct syscall *sc)
+{
+ struct format_field *field;
+ int idx = 0, len;
+
+ for (field = sc->args; field; field = field->next, ++idx) {
+ if (sc->fmt && sc->fmt->arg[idx].scnprintf)
+ continue;
+
+ if (strcmp(field->type, "const char *") == 0 &&
+ (strcmp(field->name, "filename") == 0 ||
+ strcmp(field->name, "path") == 0 ||
+ strcmp(field->name, "pathname") == 0))
+ sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
+ else if (field->flags & FIELD_IS_POINTER)
+ sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex;
+ else if (strcmp(field->type, "pid_t") == 0)
+ sc->arg_fmt[idx].scnprintf = SCA_PID;
+ else if (strcmp(field->type, "umode_t") == 0)
+ sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
+ else if ((strcmp(field->type, "int") == 0 ||
+ strcmp(field->type, "unsigned int") == 0 ||
+ strcmp(field->type, "long") == 0) &&
+ (len = strlen(field->name)) >= 2 &&
+ strcmp(field->name + len - 2, "fd") == 0) {
+ /*
+ * /sys/kernel/tracing/events/syscalls/sys_enter*
+ * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
+ * 65 int
+ * 23 unsigned int
+ * 7 unsigned long
+ */
+ sc->arg_fmt[idx].scnprintf = SCA_FD;
+ }
+ }
+
+ return 0;
+}
+
+static int trace__read_syscall_info(struct trace *trace, int id)
+{
+ char tp_name[128];
+ struct syscall *sc;
+ const char *name = syscalltbl__name(trace->sctbl, id);
+
+ if (name == NULL)
+ return -1;
+
+ if (id > trace->syscalls.max) {
+ struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
+
+ if (nsyscalls == NULL)
+ return -1;
+
+ if (trace->syscalls.max != -1) {
+ memset(nsyscalls + trace->syscalls.max + 1, 0,
+ (id - trace->syscalls.max) * sizeof(*sc));
+ } else {
+ memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
+ }
+
+ trace->syscalls.table = nsyscalls;
+ trace->syscalls.max = id;
+ }
+
+ sc = trace->syscalls.table + id;
+ sc->name = name;
+
+ sc->fmt = syscall_fmt__find(sc->name);
+
+ snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
+ sc->tp_format = trace_event__tp_format("syscalls", tp_name);
+
+ if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
+ snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
+ sc->tp_format = trace_event__tp_format("syscalls", tp_name);
+ }
+
+ if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
+ return -1;
+
+ if (IS_ERR(sc->tp_format))
+ return -1;
+
+ sc->args = sc->tp_format->format.fields;
+ /*
+ * We need to check and discard the first variable '__syscall_nr'
+ * or 'nr' that mean the syscall number. It is needless here.
+ * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
+ */
+ if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
+ sc->args = sc->args->next;
+ --sc->nr_args;
+ }
+
+ sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
+ sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
+
+ return syscall__set_arg_fmts(sc);
+}
+
+static int trace__validate_ev_qualifier(struct trace *trace)
+{
+ int err = 0, i;
+ size_t nr_allocated;
+ struct str_node *pos;
+
+ trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
+ trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
+ sizeof(trace->ev_qualifier_ids.entries[0]));
+
+ if (trace->ev_qualifier_ids.entries == NULL) {
+ fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
+ trace->output);
+ err = -EINVAL;
+ goto out;
+ }
+
+ nr_allocated = trace->ev_qualifier_ids.nr;
+ i = 0;
+
+ strlist__for_each_entry(pos, trace->ev_qualifier) {
+ const char *sc = pos->s;
+ int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
+
+ if (id < 0) {
+ id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
+ if (id >= 0)
+ goto matches;
+
+ if (err == 0) {
+ fputs("Error:\tInvalid syscall ", trace->output);
+ err = -EINVAL;
+ } else {
+ fputs(", ", trace->output);
+ }
+
+ fputs(sc, trace->output);
+ }
+matches:
+ trace->ev_qualifier_ids.entries[i++] = id;
+ if (match_next == -1)
+ continue;
+
+ while (1) {
+ id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
+ if (id < 0)
+ break;
+ if (nr_allocated == trace->ev_qualifier_ids.nr) {
+ void *entries;
+
+ nr_allocated += 8;
+ entries = realloc(trace->ev_qualifier_ids.entries,
+ nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
+ if (entries == NULL) {
+ err = -ENOMEM;
+ fputs("\nError:\t Not enough memory for parsing\n", trace->output);
+ goto out_free;
+ }
+ trace->ev_qualifier_ids.entries = entries;
+ }
+ trace->ev_qualifier_ids.nr++;
+ trace->ev_qualifier_ids.entries[i++] = id;
+ }
+ }
+
+ if (err < 0) {
+ fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
+ "\nHint:\tand: 'man syscalls'\n", trace->output);
+out_free:
+ zfree(&trace->ev_qualifier_ids.entries);
+ trace->ev_qualifier_ids.nr = 0;
+ }
+out:
+ return err;
+}
+
+/*
+ * args is to be interpreted as a series of longs but we need to handle
+ * 8-byte unaligned accesses. args points to raw_data within the event
+ * and raw_data is guaranteed to be 8-byte unaligned because it is
+ * preceded by raw_size which is a u32. So we need to copy args to a temp
+ * variable to read it. Most notably this avoids extended load instructions
+ * on unaligned addresses
+ */
+unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
+{
+ unsigned long val;
+ unsigned char *p = arg->args + sizeof(unsigned long) * idx;
+
+ memcpy(&val, p, sizeof(val));
+ return val;
+}
+
+static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
+ struct syscall_arg *arg)
+{
+ if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
+ return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
+
+ return scnprintf(bf, size, "arg%d: ", arg->idx);
+}
+
+static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
+ struct syscall_arg *arg, unsigned long val)
+{
+ if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
+ arg->val = val;
+ if (sc->arg_fmt[arg->idx].parm)
+ arg->parm = sc->arg_fmt[arg->idx].parm;
+ return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
+ }
+ return scnprintf(bf, size, "%ld", val);
+}
+
+static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
+ unsigned char *args, struct trace *trace,
+ struct thread *thread)
+{
+ size_t printed = 0;
+ unsigned long val;
+ u8 bit = 1;
+ struct syscall_arg arg = {
+ .args = args,
+ .idx = 0,
+ .mask = 0,
+ .trace = trace,
+ .thread = thread,
+ };
+ struct thread_trace *ttrace = thread__priv(thread);
+
+ /*
+ * Things like fcntl will set this in its 'cmd' formatter to pick the
+ * right formatter for the return value (an fd? file flags?), which is
+ * not needed for syscalls that always return a given type, say an fd.
+ */
+ ttrace->ret_scnprintf = NULL;
+
+ if (sc->args != NULL) {
+ struct format_field *field;
+
+ for (field = sc->args; field;
+ field = field->next, ++arg.idx, bit <<= 1) {
+ if (arg.mask & bit)
+ continue;
+
+ val = syscall_arg__val(&arg, arg.idx);
+
+ /*
+ * Suppress this argument if its value is zero and
+ * and we don't have a string associated in an
+ * strarray for it.
+ */
+ if (val == 0 &&
+ !(sc->arg_fmt &&
+ (sc->arg_fmt[arg.idx].show_zero ||
+ sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
+ sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
+ sc->arg_fmt[arg.idx].parm))
+ continue;
+
+ printed += scnprintf(bf + printed, size - printed,
+ "%s%s: ", printed ? ", " : "", field->name);
+ printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
+ }
+ } else if (IS_ERR(sc->tp_format)) {
+ /*
+ * If we managed to read the tracepoint /format file, then we
+ * may end up not having any args, like with gettid(), so only
+ * print the raw args when we didn't manage to read it.
+ */
+ while (arg.idx < sc->nr_args) {
+ if (arg.mask & bit)
+ goto next_arg;
+ val = syscall_arg__val(&arg, arg.idx);
+ if (printed)
+ printed += scnprintf(bf + printed, size - printed, ", ");
+ printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
+ printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
+next_arg:
+ ++arg.idx;
+ bit <<= 1;
+ }
+ }
+
+ return printed;
+}
+
+typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event,
+ struct perf_sample *sample);
+
+static struct syscall *trace__syscall_info(struct trace *trace,
+ struct perf_evsel *evsel, int id)
+{
+
+ if (id < 0) {
+
+ /*
+ * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
+ * before that, leaving at a higher verbosity level till that is
+ * explained. Reproduced with plain ftrace with:
+ *
+ * echo 1 > /t/events/raw_syscalls/sys_exit/enable
+ * grep "NR -1 " /t/trace_pipe
+ *
+ * After generating some load on the machine.
+ */
+ if (verbose > 1) {
+ static u64 n;
+ fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
+ id, perf_evsel__name(evsel), ++n);
+ }
+ return NULL;
+ }
+
+ if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
+ trace__read_syscall_info(trace, id))
+ goto out_cant_read;
+
+ if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
+ goto out_cant_read;
+
+ return &trace->syscalls.table[id];
+
+out_cant_read:
+ if (verbose > 0) {
+ fprintf(trace->output, "Problems reading syscall %d", id);
+ if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
+ fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
+ fputs(" information\n", trace->output);
+ }
+ return NULL;
+}
+
+static void thread__update_stats(struct thread_trace *ttrace,
+ int id, struct perf_sample *sample)
+{
+ struct int_node *inode;
+ struct stats *stats;
+ u64 duration = 0;
+
+ inode = intlist__findnew(ttrace->syscall_stats, id);
+ if (inode == NULL)
+ return;
+
+ stats = inode->priv;
+ if (stats == NULL) {
+ stats = malloc(sizeof(struct stats));
+ if (stats == NULL)
+ return;
+ init_stats(stats);
+ inode->priv = stats;
+ }
+
+ if (ttrace->entry_time && sample->time > ttrace->entry_time)
+ duration = sample->time - ttrace->entry_time;
+
+ update_stats(stats, duration);
+}
+
+static int trace__printf_interrupted_entry(struct trace *trace)
+{
+ struct thread_trace *ttrace;
+ size_t printed;
+
+ if (trace->failure_only || trace->current == NULL)
+ return 0;
+
+ ttrace = thread__priv(trace->current);
+
+ if (!ttrace->entry_pending)
+ return 0;
+
+ printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
+ printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
+ ttrace->entry_pending = false;
+
+ return printed;
+}
+
+static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample, struct thread *thread)
+{
+ int printed = 0;
+
+ if (trace->print_sample) {
+ double ts = (double)sample->time / NSEC_PER_MSEC;
+
+ printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
+ perf_evsel__name(evsel), ts,
+ thread__comm_str(thread),
+ sample->pid, sample->tid, sample->cpu);
+ }
+
+ return printed;
+}
+
+static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ char *msg;
+ void *args;
+ size_t printed = 0;
+ struct thread *thread;
+ int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
+ struct syscall *sc = trace__syscall_info(trace, evsel, id);
+ struct thread_trace *ttrace;
+
+ if (sc == NULL)
+ return -1;
+
+ thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+ ttrace = thread__trace(thread, trace->output);
+ if (ttrace == NULL)
+ goto out_put;
+
+ trace__fprintf_sample(trace, evsel, sample, thread);
+
+ args = perf_evsel__sc_tp_ptr(evsel, args, sample);
+
+ if (ttrace->entry_str == NULL) {
+ ttrace->entry_str = malloc(trace__entry_str_size);
+ if (!ttrace->entry_str)
+ goto out_put;
+ }
+
+ if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
+ trace__printf_interrupted_entry(trace);
+
+ ttrace->entry_time = sample->time;
+ msg = ttrace->entry_str;
+ printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
+
+ printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
+ args, trace, thread);
+
+ if (sc->is_exit) {
+ if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
+ trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
+ fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
+ }
+ } else {
+ ttrace->entry_pending = true;
+ /* See trace__vfs_getname & trace__sys_exit */
+ ttrace->filename.pending_open = false;
+ }
+
+ if (trace->current != thread) {
+ thread__put(trace->current);
+ trace->current = thread__get(thread);
+ }
+ err = 0;
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ struct thread_trace *ttrace;
+ struct thread *thread;
+ int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
+ struct syscall *sc = trace__syscall_info(trace, evsel, id);
+ char msg[1024];
+ void *args;
+
+ if (sc == NULL)
+ return -1;
+
+ thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+ ttrace = thread__trace(thread, trace->output);
+ /*
+ * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
+ * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
+ */
+ if (ttrace == NULL)
+ goto out_put;
+
+ args = perf_evsel__sc_tp_ptr(evsel, args, sample);
+ syscall__scnprintf_args(sc, msg, sizeof(msg), args, trace, thread);
+ fprintf(trace->output, "%s", msg);
+ err = 0;
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct callchain_cursor *cursor)
+{
+ struct addr_location al;
+ int max_stack = evsel->attr.sample_max_stack ?
+ evsel->attr.sample_max_stack :
+ trace->max_stack;
+
+ if (machine__resolve(trace->host, &al, sample) < 0 ||
+ thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack))
+ return -1;
+
+ return 0;
+}
+
+static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
+{
+ /* TODO: user-configurable print_opts */
+ const unsigned int print_opts = EVSEL__PRINT_SYM |
+ EVSEL__PRINT_DSO |
+ EVSEL__PRINT_UNKNOWN_AS_ADDR;
+
+ return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
+}
+
+static const char *errno_to_name(struct perf_evsel *evsel, int err)
+{
+ struct perf_env *env = perf_evsel__env(evsel);
+ const char *arch_name = perf_env__arch(env);
+
+ return arch_syscalls__strerrno(arch_name, err);
+}
+
+static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ long ret;
+ u64 duration = 0;
+ bool duration_calculated = false;
+ struct thread *thread;
+ int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
+ struct syscall *sc = trace__syscall_info(trace, evsel, id);
+ struct thread_trace *ttrace;
+
+ if (sc == NULL)
+ return -1;
+
+ thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+ ttrace = thread__trace(thread, trace->output);
+ if (ttrace == NULL)
+ goto out_put;
+
+ trace__fprintf_sample(trace, evsel, sample, thread);
+
+ if (trace->summary)
+ thread__update_stats(ttrace, id, sample);
+
+ ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
+
+ if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
+ trace__set_fd_pathname(thread, ret, ttrace->filename.name);
+ ttrace->filename.pending_open = false;
+ ++trace->stats.vfs_getname;
+ }
+
+ if (ttrace->entry_time) {
+ duration = sample->time - ttrace->entry_time;
+ if (trace__filter_duration(trace, duration))
+ goto out;
+ duration_calculated = true;
+ } else if (trace->duration_filter)
+ goto out;
+
+ if (sample->callchain) {
+ callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+ if (callchain_ret == 0) {
+ if (callchain_cursor.nr < trace->min_stack)
+ goto out;
+ callchain_ret = 1;
+ }
+ }
+
+ if (trace->summary_only || (ret >= 0 && trace->failure_only))
+ goto out;
+
+ trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
+
+ if (ttrace->entry_pending) {
+ fprintf(trace->output, "%-70s", ttrace->entry_str);
+ } else {
+ fprintf(trace->output, " ... [");
+ color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
+ fprintf(trace->output, "]: %s()", sc->name);
+ }
+
+ if (sc->fmt == NULL) {
+ if (ret < 0)
+ goto errno_print;
+signed_print:
+ fprintf(trace->output, ") = %ld", ret);
+ } else if (ret < 0) {
+errno_print: {
+ char bf[STRERR_BUFSIZE];
+ const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
+ *e = errno_to_name(evsel, -ret);
+
+ fprintf(trace->output, ") = -1 %s %s", e, emsg);
+ }
+ } else if (ret == 0 && sc->fmt->timeout)
+ fprintf(trace->output, ") = 0 Timeout");
+ else if (ttrace->ret_scnprintf) {
+ char bf[1024];
+ struct syscall_arg arg = {
+ .val = ret,
+ .thread = thread,
+ .trace = trace,
+ };
+ ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
+ ttrace->ret_scnprintf = NULL;
+ fprintf(trace->output, ") = %s", bf);
+ } else if (sc->fmt->hexret)
+ fprintf(trace->output, ") = %#lx", ret);
+ else if (sc->fmt->errpid) {
+ struct thread *child = machine__find_thread(trace->host, ret, ret);
+
+ if (child != NULL) {
+ fprintf(trace->output, ") = %ld", ret);
+ if (child->comm_set)
+ fprintf(trace->output, " (%s)", thread__comm_str(child));
+ thread__put(child);
+ }
+ } else
+ goto signed_print;
+
+ fputc('\n', trace->output);
+
+ if (callchain_ret > 0)
+ trace__fprintf_callchain(trace, sample);
+ else if (callchain_ret < 0)
+ pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+ ttrace->entry_pending = false;
+ err = 0;
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+ struct thread_trace *ttrace;
+ size_t filename_len, entry_str_len, to_move;
+ ssize_t remaining_space;
+ char *pos;
+ const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
+
+ if (!thread)
+ goto out;
+
+ ttrace = thread__priv(thread);
+ if (!ttrace)
+ goto out_put;
+
+ filename_len = strlen(filename);
+ if (filename_len == 0)
+ goto out_put;
+
+ if (ttrace->filename.namelen < filename_len) {
+ char *f = realloc(ttrace->filename.name, filename_len + 1);
+
+ if (f == NULL)
+ goto out_put;
+
+ ttrace->filename.namelen = filename_len;
+ ttrace->filename.name = f;
+ }
+
+ strcpy(ttrace->filename.name, filename);
+ ttrace->filename.pending_open = true;
+
+ if (!ttrace->filename.ptr)
+ goto out_put;
+
+ entry_str_len = strlen(ttrace->entry_str);
+ remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
+ if (remaining_space <= 0)
+ goto out_put;
+
+ if (filename_len > (size_t)remaining_space) {
+ filename += filename_len - remaining_space;
+ filename_len = remaining_space;
+ }
+
+ to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
+ pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
+ memmove(pos + filename_len, pos, to_move);
+ memcpy(pos, filename, filename_len);
+
+ ttrace->filename.ptr = 0;
+ ttrace->filename.entry_str_pos = 0;
+out_put:
+ thread__put(thread);
+out:
+ return 0;
+}
+
+static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
+ double runtime_ms = (double)runtime / NSEC_PER_MSEC;
+ struct thread *thread = machine__findnew_thread(trace->host,
+ sample->pid,
+ sample->tid);
+ struct thread_trace *ttrace = thread__trace(thread, trace->output);
+
+ if (ttrace == NULL)
+ goto out_dump;
+
+ ttrace->runtime_ms += runtime_ms;
+ trace->runtime_ms += runtime_ms;
+out_put:
+ thread__put(thread);
+ return 0;
+
+out_dump:
+ fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
+ evsel->name,
+ perf_evsel__strval(evsel, sample, "comm"),
+ (pid_t)perf_evsel__intval(evsel, sample, "pid"),
+ runtime,
+ perf_evsel__intval(evsel, sample, "vruntime"));
+ goto out_put;
+}
+
+static int bpf_output__printer(enum binary_printer_ops op,
+ unsigned int val, void *extra __maybe_unused, FILE *fp)
+{
+ unsigned char ch = (unsigned char)val;
+
+ switch (op) {
+ case BINARY_PRINT_CHAR_DATA:
+ return fprintf(fp, "%c", isprint(ch) ? ch : '.');
+ case BINARY_PRINT_DATA_BEGIN:
+ case BINARY_PRINT_LINE_BEGIN:
+ case BINARY_PRINT_ADDR:
+ case BINARY_PRINT_NUM_DATA:
+ case BINARY_PRINT_NUM_PAD:
+ case BINARY_PRINT_SEP:
+ case BINARY_PRINT_CHAR_PAD:
+ case BINARY_PRINT_LINE_END:
+ case BINARY_PRINT_DATA_END:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void bpf_output__fprintf(struct trace *trace,
+ struct perf_sample *sample)
+{
+ binary__fprintf(sample->raw_data, sample->raw_size, 8,
+ bpf_output__printer, NULL, trace->output);
+}
+
+static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ int callchain_ret = 0;
+
+ if (sample->callchain) {
+ callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+ if (callchain_ret == 0) {
+ if (callchain_cursor.nr < trace->min_stack)
+ goto out;
+ callchain_ret = 1;
+ }
+ }
+
+ trace__printf_interrupted_entry(trace);
+ trace__fprintf_tstamp(trace, sample->time, trace->output);
+
+ if (trace->trace_syscalls)
+ fprintf(trace->output, "( ): ");
+
+ fprintf(trace->output, "%s:", evsel->name);
+
+ if (perf_evsel__is_bpf_output(evsel)) {
+ if (evsel == trace->syscalls.events.augmented)
+ trace__fprintf_sys_enter(trace, evsel, sample);
+ else
+ bpf_output__fprintf(trace, sample);
+ } else if (evsel->tp_format) {
+ if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
+ trace__fprintf_sys_enter(trace, evsel, sample)) {
+ event_format__fprintf(evsel->tp_format, sample->cpu,
+ sample->raw_data, sample->raw_size,
+ trace->output);
+ }
+ }
+
+ fprintf(trace->output, "\n");
+
+ if (callchain_ret > 0)
+ trace__fprintf_callchain(trace, sample);
+ else if (callchain_ret < 0)
+ pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+ return 0;
+}
+
+static void print_location(FILE *f, struct perf_sample *sample,
+ struct addr_location *al,
+ bool print_dso, bool print_sym)
+{
+
+ if ((verbose > 0 || print_dso) && al->map)
+ fprintf(f, "%s@", al->map->dso->long_name);
+
+ if ((verbose > 0 || print_sym) && al->sym)
+ fprintf(f, "%s+0x%" PRIx64, al->sym->name,
+ al->addr - al->sym->start);
+ else if (al->map)
+ fprintf(f, "0x%" PRIx64, al->addr);
+ else
+ fprintf(f, "0x%" PRIx64, sample->addr);
+}
+
+static int trace__pgfault(struct trace *trace,
+ struct perf_evsel *evsel,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample)
+{
+ struct thread *thread;
+ struct addr_location al;
+ char map_type = 'd';
+ struct thread_trace *ttrace;
+ int err = -1;
+ int callchain_ret = 0;
+
+ thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+
+ if (sample->callchain) {
+ callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+ if (callchain_ret == 0) {
+ if (callchain_cursor.nr < trace->min_stack)
+ goto out_put;
+ callchain_ret = 1;
+ }
+ }
+
+ ttrace = thread__trace(thread, trace->output);
+ if (ttrace == NULL)
+ goto out_put;
+
+ if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
+ ttrace->pfmaj++;
+ else
+ ttrace->pfmin++;
+
+ if (trace->summary_only)
+ goto out;
+
+ thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
+
+ trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
+
+ fprintf(trace->output, "%sfault [",
+ evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
+ "maj" : "min");
+
+ print_location(trace->output, sample, &al, false, true);
+
+ fprintf(trace->output, "] => ");
+
+ thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
+
+ if (!al.map) {
+ thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
+
+ if (al.map)
+ map_type = 'x';
+ else
+ map_type = '?';
+ }
+
+ print_location(trace->output, sample, &al, true, false);
+
+ fprintf(trace->output, " (%c%c)\n", map_type, al.level);
+
+ if (callchain_ret > 0)
+ trace__fprintf_callchain(trace, sample);
+ else if (callchain_ret < 0)
+ pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+ err = 0;
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static void trace__set_base_time(struct trace *trace,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ /*
+ * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
+ * and don't use sample->time unconditionally, we may end up having
+ * some other event in the future without PERF_SAMPLE_TIME for good
+ * reason, i.e. we may not be interested in its timestamps, just in
+ * it taking place, picking some piece of information when it
+ * appears in our event stream (vfs_getname comes to mind).
+ */
+ if (trace->base_time == 0 && !trace->full_time &&
+ (evsel->attr.sample_type & PERF_SAMPLE_TIME))
+ trace->base_time = sample->time;
+}
+
+static int trace__process_sample(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine __maybe_unused)
+{
+ struct trace *trace = container_of(tool, struct trace, tool);
+ struct thread *thread;
+ int err = 0;
+
+ tracepoint_handler handler = evsel->handler;
+
+ thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+ if (thread && thread__is_filtered(thread))
+ goto out;
+
+ trace__set_base_time(trace, evsel, sample);
+
+ if (handler) {
+ ++trace->nr_events;
+ handler(trace, evsel, event, sample);
+ }
+out:
+ thread__put(thread);
+ return err;
+}
+
+static int trace__record(struct trace *trace, int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+ const char * const record_args[] = {
+ "record",
+ "-R",
+ "-m", "1024",
+ "-c", "1",
+ };
+
+ const char * const sc_args[] = { "-e", };
+ unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
+ const char * const majpf_args[] = { "-e", "major-faults" };
+ unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
+ const char * const minpf_args[] = { "-e", "minor-faults" };
+ unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
+
+ /* +1 is for the event string below */
+ rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
+ majpf_args_nr + minpf_args_nr + argc;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ j = 0;
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[j++] = record_args[i];
+
+ if (trace->trace_syscalls) {
+ for (i = 0; i < sc_args_nr; i++)
+ rec_argv[j++] = sc_args[i];
+
+ /* event string may be different for older kernels - e.g., RHEL6 */
+ if (is_valid_tracepoint("raw_syscalls:sys_enter"))
+ rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
+ else if (is_valid_tracepoint("syscalls:sys_enter"))
+ rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
+ else {
+ pr_err("Neither raw_syscalls nor syscalls events exist.\n");
+ free(rec_argv);
+ return -1;
+ }
+ }
+
+ if (trace->trace_pgfaults & TRACE_PFMAJ)
+ for (i = 0; i < majpf_args_nr; i++)
+ rec_argv[j++] = majpf_args[i];
+
+ if (trace->trace_pgfaults & TRACE_PFMIN)
+ for (i = 0; i < minpf_args_nr; i++)
+ rec_argv[j++] = minpf_args[i];
+
+ for (i = 0; i < (unsigned int)argc; i++)
+ rec_argv[j++] = argv[i];
+
+ return cmd_record(j, rec_argv);
+}
+
+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
+
+static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
+
+ if (IS_ERR(evsel))
+ return false;
+
+ if (perf_evsel__field(evsel, "pathname") == NULL) {
+ perf_evsel__delete(evsel);
+ return false;
+ }
+
+ evsel->handler = trace__vfs_getname;
+ perf_evlist__add(evlist, evsel);
+ return true;
+}
+
+static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
+{
+ struct perf_evsel *evsel;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_SOFTWARE,
+ .mmap_data = 1,
+ };
+
+ attr.config = config;
+ attr.sample_period = 1;
+
+ event_attr_init(&attr);
+
+ evsel = perf_evsel__new(&attr);
+ if (evsel)
+ evsel->handler = trace__pgfault;
+
+ return evsel;
+}
+
+static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
+{
+ const u32 type = event->header.type;
+ struct perf_evsel *evsel;
+
+ if (type != PERF_RECORD_SAMPLE) {
+ trace__process_event(trace, trace->host, event, sample);
+ return;
+ }
+
+ evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
+ if (evsel == NULL) {
+ fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
+ return;
+ }
+
+ trace__set_base_time(trace, evsel, sample);
+
+ if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
+ sample->raw_data == NULL) {
+ fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
+ perf_evsel__name(evsel), sample->tid,
+ sample->cpu, sample->raw_size);
+ } else {
+ tracepoint_handler handler = evsel->handler;
+ handler(trace, evsel, event, sample);
+ }
+}
+
+static int trace__add_syscall_newtp(struct trace *trace)
+{
+ int ret = -1;
+ struct perf_evlist *evlist = trace->evlist;
+ struct perf_evsel *sys_enter, *sys_exit;
+
+ sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
+ if (sys_enter == NULL)
+ goto out;
+
+ if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
+ goto out_delete_sys_enter;
+
+ sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
+ if (sys_exit == NULL)
+ goto out_delete_sys_enter;
+
+ if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
+ goto out_delete_sys_exit;
+
+ perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
+ perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
+
+ perf_evlist__add(evlist, sys_enter);
+ perf_evlist__add(evlist, sys_exit);
+
+ if (callchain_param.enabled && !trace->kernel_syscallchains) {
+ /*
+ * We're interested only in the user space callchain
+ * leading to the syscall, allow overriding that for
+ * debugging reasons using --kernel_syscall_callchains
+ */
+ sys_exit->attr.exclude_callchain_kernel = 1;
+ }
+
+ trace->syscalls.events.sys_enter = sys_enter;
+ trace->syscalls.events.sys_exit = sys_exit;
+
+ ret = 0;
+out:
+ return ret;
+
+out_delete_sys_exit:
+ perf_evsel__delete_priv(sys_exit);
+out_delete_sys_enter:
+ perf_evsel__delete_priv(sys_enter);
+ goto out;
+}
+
+static int trace__set_ev_qualifier_filter(struct trace *trace)
+{
+ int err = -1;
+ struct perf_evsel *sys_exit;
+ char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
+ trace->ev_qualifier_ids.nr,
+ trace->ev_qualifier_ids.entries);
+
+ if (filter == NULL)
+ goto out_enomem;
+
+ if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
+ filter)) {
+ sys_exit = trace->syscalls.events.sys_exit;
+ err = perf_evsel__append_tp_filter(sys_exit, filter);
+ }
+
+ free(filter);
+out:
+ return err;
+out_enomem:
+ errno = ENOMEM;
+ goto out;
+}
+
+static int trace__set_filter_loop_pids(struct trace *trace)
+{
+ unsigned int nr = 1;
+ pid_t pids[32] = {
+ getpid(),
+ };
+ struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
+
+ while (thread && nr < ARRAY_SIZE(pids)) {
+ struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
+
+ if (parent == NULL)
+ break;
+
+ if (!strcmp(thread__comm_str(parent), "sshd")) {
+ pids[nr++] = parent->tid;
+ break;
+ }
+ thread = parent;
+ }
+
+ return perf_evlist__set_filter_pids(trace->evlist, nr, pids);
+}
+
+static int trace__run(struct trace *trace, int argc, const char **argv)
+{
+ struct perf_evlist *evlist = trace->evlist;
+ struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
+ int err = -1, i;
+ unsigned long before;
+ const bool forks = argc > 0;
+ bool draining = false;
+
+ trace->live = true;
+
+ if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
+ goto out_error_raw_syscalls;
+
+ if (trace->trace_syscalls)
+ trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
+
+ if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
+ pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
+ if (pgfault_maj == NULL)
+ goto out_error_mem;
+ perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
+ perf_evlist__add(evlist, pgfault_maj);
+ }
+
+ if ((trace->trace_pgfaults & TRACE_PFMIN)) {
+ pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
+ if (pgfault_min == NULL)
+ goto out_error_mem;
+ perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
+ perf_evlist__add(evlist, pgfault_min);
+ }
+
+ if (trace->sched &&
+ perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
+ trace__sched_stat_runtime))
+ goto out_error_sched_stat_runtime;
+
+ /*
+ * If a global cgroup was set, apply it to all the events without an
+ * explicit cgroup. I.e.:
+ *
+ * trace -G A -e sched:*switch
+ *
+ * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
+ * _and_ sched:sched_switch to the 'A' cgroup, while:
+ *
+ * trace -e sched:*switch -G A
+ *
+ * will only set the sched:sched_switch event to the 'A' cgroup, all the
+ * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
+ * a cgroup (on the root cgroup, sys wide, etc).
+ *
+ * Multiple cgroups:
+ *
+ * trace -G A -e sched:*switch -G B
+ *
+ * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
+ * to the 'B' cgroup.
+ *
+ * evlist__set_default_cgroup() grabs a reference of the passed cgroup
+ * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
+ */
+ if (trace->cgroup)
+ evlist__set_default_cgroup(trace->evlist, trace->cgroup);
+
+ err = perf_evlist__create_maps(evlist, &trace->opts.target);
+ if (err < 0) {
+ fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
+ goto out_delete_evlist;
+ }
+
+ err = trace__symbols_init(trace, evlist);
+ if (err < 0) {
+ fprintf(trace->output, "Problems initializing symbol libraries!\n");
+ goto out_delete_evlist;
+ }
+
+ perf_evlist__config(evlist, &trace->opts, &callchain_param);
+
+ signal(SIGCHLD, sig_handler);
+ signal(SIGINT, sig_handler);
+
+ if (forks) {
+ err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
+ argv, false, NULL);
+ if (err < 0) {
+ fprintf(trace->output, "Couldn't run the workload!\n");
+ goto out_delete_evlist;
+ }
+ }
+
+ err = perf_evlist__open(evlist);
+ if (err < 0)
+ goto out_error_open;
+
+ err = bpf__apply_obj_config();
+ if (err) {
+ char errbuf[BUFSIZ];
+
+ bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
+ pr_err("ERROR: Apply config to BPF failed: %s\n",
+ errbuf);
+ goto out_error_open;
+ }
+
+ /*
+ * Better not use !target__has_task() here because we need to cover the
+ * case where no threads were specified in the command line, but a
+ * workload was, and in that case we will fill in the thread_map when
+ * we fork the workload in perf_evlist__prepare_workload.
+ */
+ if (trace->filter_pids.nr > 0)
+ err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
+ else if (thread_map__pid(evlist->threads, 0) == -1)
+ err = trace__set_filter_loop_pids(trace);
+
+ if (err < 0)
+ goto out_error_mem;
+
+ if (trace->ev_qualifier_ids.nr > 0) {
+ err = trace__set_ev_qualifier_filter(trace);
+ if (err < 0)
+ goto out_errno;
+
+ pr_debug("event qualifier tracepoint filter: %s\n",
+ trace->syscalls.events.sys_exit->filter);
+ }
+
+ err = perf_evlist__apply_filters(evlist, &evsel);
+ if (err < 0)
+ goto out_error_apply_filters;
+
+ err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
+ if (err < 0)
+ goto out_error_mmap;
+
+ if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
+ perf_evlist__enable(evlist);
+
+ if (forks)
+ perf_evlist__start_workload(evlist);
+
+ if (trace->opts.initial_delay) {
+ usleep(trace->opts.initial_delay * 1000);
+ perf_evlist__enable(evlist);
+ }
+
+ trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
+ evlist->threads->nr > 1 ||
+ perf_evlist__first(evlist)->attr.inherit;
+
+ /*
+ * Now that we already used evsel->attr to ask the kernel to setup the
+ * events, lets reuse evsel->attr.sample_max_stack as the limit in
+ * trace__resolve_callchain(), allowing per-event max-stack settings
+ * to override an explicitely set --max-stack global setting.
+ */
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel__has_callchain(evsel) &&
+ evsel->attr.sample_max_stack == 0)
+ evsel->attr.sample_max_stack = trace->max_stack;
+ }
+again:
+ before = trace->nr_events;
+
+ for (i = 0; i < evlist->nr_mmaps; i++) {
+ union perf_event *event;
+ struct perf_mmap *md;
+
+ md = &evlist->mmap[i];
+ if (perf_mmap__read_init(md) < 0)
+ continue;
+
+ while ((event = perf_mmap__read_event(md)) != NULL) {
+ struct perf_sample sample;
+
+ ++trace->nr_events;
+
+ err = perf_evlist__parse_sample(evlist, event, &sample);
+ if (err) {
+ fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
+ goto next_event;
+ }
+
+ trace__handle_event(trace, event, &sample);
+next_event:
+ perf_mmap__consume(md);
+
+ if (interrupted)
+ goto out_disable;
+
+ if (done && !draining) {
+ perf_evlist__disable(evlist);
+ draining = true;
+ }
+ }
+ perf_mmap__read_done(md);
+ }
+
+ if (trace->nr_events == before) {
+ int timeout = done ? 100 : -1;
+
+ if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
+ if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
+ draining = true;
+
+ goto again;
+ }
+ } else {
+ goto again;
+ }
+
+out_disable:
+ thread__zput(trace->current);
+
+ perf_evlist__disable(evlist);
+
+ if (!err) {
+ if (trace->summary)
+ trace__fprintf_thread_summary(trace, trace->output);
+
+ if (trace->show_tool_stats) {
+ fprintf(trace->output, "Stats:\n "
+ " vfs_getname : %" PRIu64 "\n"
+ " proc_getname: %" PRIu64 "\n",
+ trace->stats.vfs_getname,
+ trace->stats.proc_getname);
+ }
+ }
+
+out_delete_evlist:
+ trace__symbols__exit(trace);
+
+ perf_evlist__delete(evlist);
+ cgroup__put(trace->cgroup);
+ trace->evlist = NULL;
+ trace->live = false;
+ return err;
+{
+ char errbuf[BUFSIZ];
+
+out_error_sched_stat_runtime:
+ tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
+ goto out_error;
+
+out_error_raw_syscalls:
+ tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
+ goto out_error;
+
+out_error_mmap:
+ perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
+ goto out_error;
+
+out_error_open:
+ perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
+
+out_error:
+ fprintf(trace->output, "%s\n", errbuf);
+ goto out_delete_evlist;
+
+out_error_apply_filters:
+ fprintf(trace->output,
+ "Failed to set filter \"%s\" on event %s with %d (%s)\n",
+ evsel->filter, perf_evsel__name(evsel), errno,
+ str_error_r(errno, errbuf, sizeof(errbuf)));
+ goto out_delete_evlist;
+}
+out_error_mem:
+ fprintf(trace->output, "Not enough memory to run!\n");
+ goto out_delete_evlist;
+
+out_errno:
+ fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
+ goto out_delete_evlist;
+}
+
+static int trace__replay(struct trace *trace)
+{
+ const struct perf_evsel_str_handler handlers[] = {
+ { "probe:vfs_getname", trace__vfs_getname, },
+ };
+ struct perf_data data = {
+ .file = {
+ .path = input_name,
+ },
+ .mode = PERF_DATA_MODE_READ,
+ .force = trace->force,
+ };
+ struct perf_session *session;
+ struct perf_evsel *evsel;
+ int err = -1;
+
+ trace->tool.sample = trace__process_sample;
+ trace->tool.mmap = perf_event__process_mmap;
+ trace->tool.mmap2 = perf_event__process_mmap2;
+ trace->tool.comm = perf_event__process_comm;
+ trace->tool.exit = perf_event__process_exit;
+ trace->tool.fork = perf_event__process_fork;
+ trace->tool.attr = perf_event__process_attr;
+ trace->tool.tracing_data = perf_event__process_tracing_data;
+ trace->tool.build_id = perf_event__process_build_id;
+ trace->tool.namespaces = perf_event__process_namespaces;
+
+ trace->tool.ordered_events = true;
+ trace->tool.ordering_requires_timestamps = true;
+
+ /* add tid to output */
+ trace->multiple_threads = true;
+
+ session = perf_session__new(&data, false, &trace->tool);
+ if (session == NULL)
+ return -1;
+
+ if (trace->opts.target.pid)
+ symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
+
+ if (trace->opts.target.tid)
+ symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
+
+ if (symbol__init(&session->header.env) < 0)
+ goto out;
+
+ trace->host = &session->machines.host;
+
+ err = perf_session__set_tracepoints_handlers(session, handlers);
+ if (err)
+ goto out;
+
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+ "raw_syscalls:sys_enter");
+ /* older kernels have syscalls tp versus raw_syscalls */
+ if (evsel == NULL)
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+ "syscalls:sys_enter");
+
+ if (evsel &&
+ (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
+ perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
+ pr_err("Error during initialize raw_syscalls:sys_enter event\n");
+ goto out;
+ }
+
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+ "raw_syscalls:sys_exit");
+ if (evsel == NULL)
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+ "syscalls:sys_exit");
+ if (evsel &&
+ (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
+ perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
+ pr_err("Error during initialize raw_syscalls:sys_exit event\n");
+ goto out;
+ }
+
+ evlist__for_each_entry(session->evlist, evsel) {
+ if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
+ (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
+ evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
+ evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
+ evsel->handler = trace__pgfault;
+ }
+
+ setup_pager();
+
+ err = perf_session__process_events(session);
+ if (err)
+ pr_err("Failed to process events, error %d", err);
+
+ else if (trace->summary)
+ trace__fprintf_thread_summary(trace, trace->output);
+
+out:
+ perf_session__delete(session);
+
+ return err;
+}
+
+static size_t trace__fprintf_threads_header(FILE *fp)
+{
+ size_t printed;
+
+ printed = fprintf(fp, "\n Summary of events:\n\n");
+
+ return printed;
+}
+
+DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
+ struct stats *stats;
+ double msecs;
+ int syscall;
+)
+{
+ struct int_node *source = rb_entry(nd, struct int_node, rb_node);
+ struct stats *stats = source->priv;
+
+ entry->syscall = source->i;
+ entry->stats = stats;
+ entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
+}
+
+static size_t thread__dump_stats(struct thread_trace *ttrace,
+ struct trace *trace, FILE *fp)
+{
+ size_t printed = 0;
+ struct syscall *sc;
+ struct rb_node *nd;
+ DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
+
+ if (syscall_stats == NULL)
+ return 0;
+
+ printed += fprintf(fp, "\n");
+
+ printed += fprintf(fp, " syscall calls total min avg max stddev\n");
+ printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
+ printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
+
+ resort_rb__for_each_entry(nd, syscall_stats) {
+ struct stats *stats = syscall_stats_entry->stats;
+ if (stats) {
+ double min = (double)(stats->min) / NSEC_PER_MSEC;
+ double max = (double)(stats->max) / NSEC_PER_MSEC;
+ double avg = avg_stats(stats);
+ double pct;
+ u64 n = (u64) stats->n;
+
+ pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
+ avg /= NSEC_PER_MSEC;
+
+ sc = &trace->syscalls.table[syscall_stats_entry->syscall];
+ printed += fprintf(fp, " %-15s", sc->name);
+ printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
+ n, syscall_stats_entry->msecs, min, avg);
+ printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
+ }
+ }
+
+ resort_rb__delete(syscall_stats);
+ printed += fprintf(fp, "\n\n");
+
+ return printed;
+}
+
+static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
+{
+ size_t printed = 0;
+ struct thread_trace *ttrace = thread__priv(thread);
+ double ratio;
+
+ if (ttrace == NULL)
+ return 0;
+
+ ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
+
+ printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
+ printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
+ printed += fprintf(fp, "%.1f%%", ratio);
+ if (ttrace->pfmaj)
+ printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
+ if (ttrace->pfmin)
+ printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
+ if (trace->sched)
+ printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
+ else if (fputc('\n', fp) != EOF)
+ ++printed;
+
+ printed += thread__dump_stats(ttrace, trace, fp);
+
+ return printed;
+}
+
+static unsigned long thread__nr_events(struct thread_trace *ttrace)
+{
+ return ttrace ? ttrace->nr_events : 0;
+}
+
+DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
+ struct thread *thread;
+)
+{
+ entry->thread = rb_entry(nd, struct thread, rb_node);
+}
+
+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
+{
+ size_t printed = trace__fprintf_threads_header(fp);
+ struct rb_node *nd;
+ int i;
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
+
+ if (threads == NULL) {
+ fprintf(fp, "%s", "Error sorting output by nr_events!\n");
+ return 0;
+ }
+
+ resort_rb__for_each_entry(nd, threads)
+ printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
+
+ resort_rb__delete(threads);
+ }
+ return printed;
+}
+
+static int trace__set_duration(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct trace *trace = opt->value;
+
+ trace->duration_filter = atof(str);
+ return 0;
+}
+
+static int trace__set_filter_pids(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ int ret = -1;
+ size_t i;
+ struct trace *trace = opt->value;
+ /*
+ * FIXME: introduce a intarray class, plain parse csv and create a
+ * { int nr, int entries[] } struct...
+ */
+ struct intlist *list = intlist__new(str);
+
+ if (list == NULL)
+ return -1;
+
+ i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
+ trace->filter_pids.entries = calloc(i, sizeof(pid_t));
+
+ if (trace->filter_pids.entries == NULL)
+ goto out;
+
+ trace->filter_pids.entries[0] = getpid();
+
+ for (i = 1; i < trace->filter_pids.nr; ++i)
+ trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
+
+ intlist__delete(list);
+ ret = 0;
+out:
+ return ret;
+}
+
+static int trace__open_output(struct trace *trace, const char *filename)
+{
+ struct stat st;
+
+ if (!stat(filename, &st) && st.st_size) {
+ char oldname[PATH_MAX];
+
+ scnprintf(oldname, sizeof(oldname), "%s.old", filename);
+ unlink(oldname);
+ rename(filename, oldname);
+ }
+
+ trace->output = fopen(filename, "w");
+
+ return trace->output == NULL ? -errno : 0;
+}
+
+static int parse_pagefaults(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ int *trace_pgfaults = opt->value;
+
+ if (strcmp(str, "all") == 0)
+ *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
+ else if (strcmp(str, "maj") == 0)
+ *trace_pgfaults |= TRACE_PFMAJ;
+ else if (strcmp(str, "min") == 0)
+ *trace_pgfaults |= TRACE_PFMIN;
+ else
+ return -1;
+
+ return 0;
+}
+
+static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
+{
+ struct perf_evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel)
+ evsel->handler = handler;
+}
+
+static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->priv || !evsel->tp_format)
+ continue;
+
+ if (strcmp(evsel->tp_format->system, "syscalls"))
+ continue;
+
+ if (perf_evsel__init_syscall_tp(evsel))
+ return -1;
+
+ if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
+ struct syscall_tp *sc = evsel->priv;
+
+ if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
+ return -1;
+ } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
+ struct syscall_tp *sc = evsel->priv;
+
+ if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * XXX: Hackish, just splitting the combined -e+--event (syscalls
+ * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
+ * existing facilities unchanged (trace->ev_qualifier + parse_options()).
+ *
+ * It'd be better to introduce a parse_options() variant that would return a
+ * list with the terms it didn't match to an event...
+ */
+static int trace__parse_events_option(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct trace *trace = (struct trace *)opt->value;
+ const char *s = str;
+ char *sep = NULL, *lists[2] = { NULL, NULL, };
+ int len = strlen(str) + 1, err = -1, list, idx;
+ char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
+ char group_name[PATH_MAX];
+
+ if (strace_groups_dir == NULL)
+ return -1;
+
+ if (*s == '!') {
+ ++s;
+ trace->not_ev_qualifier = true;
+ }
+
+ while (1) {
+ if ((sep = strchr(s, ',')) != NULL)
+ *sep = '\0';
+
+ list = 0;
+ if (syscalltbl__id(trace->sctbl, s) >= 0 ||
+ syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
+ list = 1;
+ } else {
+ path__join(group_name, sizeof(group_name), strace_groups_dir, s);
+ if (access(group_name, R_OK) == 0)
+ list = 1;
+ }
+
+ if (lists[list]) {
+ sprintf(lists[list] + strlen(lists[list]), ",%s", s);
+ } else {
+ lists[list] = malloc(len);
+ if (lists[list] == NULL)
+ goto out;
+ strcpy(lists[list], s);
+ }
+
+ if (!sep)
+ break;
+
+ *sep = ',';
+ s = sep + 1;
+ }
+
+ if (lists[1] != NULL) {
+ struct strlist_config slist_config = {
+ .dirname = strace_groups_dir,
+ };
+
+ trace->ev_qualifier = strlist__new(lists[1], &slist_config);
+ if (trace->ev_qualifier == NULL) {
+ fputs("Not enough memory to parse event qualifier", trace->output);
+ goto out;
+ }
+
+ if (trace__validate_ev_qualifier(trace))
+ goto out;
+ trace->trace_syscalls = true;
+ }
+
+ err = 0;
+
+ if (lists[0]) {
+ struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
+ "event selector. use 'perf list' to list available events",
+ parse_events_option);
+ err = parse_events_option(&o, lists[0], 0);
+ }
+out:
+ if (sep)
+ *sep = ',';
+
+ return err;
+}
+
+static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
+{
+ struct trace *trace = opt->value;
+
+ if (!list_empty(&trace->evlist->entries))
+ return parse_cgroups(opt, str, unset);
+
+ trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
+
+ return 0;
+}
+
+int cmd_trace(int argc, const char **argv)
+{
+ const char *trace_usage[] = {
+ "perf trace [<options>] [<command>]",
+ "perf trace [<options>] -- <command> [<options>]",
+ "perf trace record [<options>] [<command>]",
+ "perf trace record [<options>] -- <command> [<options>]",
+ NULL
+ };
+ struct trace trace = {
+ .syscalls = {
+ . max = -1,
+ },
+ .opts = {
+ .target = {
+ .uid = UINT_MAX,
+ .uses_mmap = true,
+ },
+ .user_freq = UINT_MAX,
+ .user_interval = ULLONG_MAX,
+ .no_buffering = true,
+ .mmap_pages = UINT_MAX,
+ .proc_map_timeout = 500,
+ },
+ .output = stderr,
+ .show_comm = true,
+ .trace_syscalls = false,
+ .kernel_syscallchains = false,
+ .max_stack = UINT_MAX,
+ };
+ const char *output_name = NULL;
+ const struct option trace_options[] = {
+ OPT_CALLBACK('e', "event", &trace, "event",
+ "event/syscall selector. use 'perf list' to list available events",
+ trace__parse_events_option),
+ OPT_BOOLEAN(0, "comm", &trace.show_comm,
+ "show the thread COMM next to its id"),
+ OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
+ OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
+ trace__parse_events_option),
+ OPT_STRING('o', "output", &output_name, "file", "output file name"),
+ OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
+ OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
+ "trace events on existing process id"),
+ OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
+ "trace events on existing thread id"),
+ OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
+ "pids to filter (by the kernel)", trace__set_filter_pids),
+ OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
+ "list of cpus to monitor"),
+ OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
+ "child tasks do not inherit counters"),
+ OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
+ "number of mmap data pages",
+ perf_evlist__parse_mmap_pages),
+ OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
+ "user to profile"),
+ OPT_CALLBACK(0, "duration", &trace, "float",
+ "show only events with duration > N.M ms",
+ trace__set_duration),
+ OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
+ OPT_INCR('v', "verbose", &verbose, "be more verbose"),
+ OPT_BOOLEAN('T', "time", &trace.full_time,
+ "Show full timestamp, not time relative to first start"),
+ OPT_BOOLEAN(0, "failure", &trace.failure_only,
+ "Show only syscalls that failed"),
+ OPT_BOOLEAN('s', "summary", &trace.summary_only,
+ "Show only syscall summary with statistics"),
+ OPT_BOOLEAN('S', "with-summary", &trace.summary,
+ "Show all syscalls and summary with statistics"),
+ OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
+ "Trace pagefaults", parse_pagefaults, "maj"),
+ OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
+ OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
+ OPT_CALLBACK(0, "call-graph", &trace.opts,
+ "record_mode[,record_size]", record_callchain_help,
+ &record_parse_callchain_opt),
+ OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
+ "Show the kernel callchains on the syscall exit path"),
+ OPT_UINTEGER(0, "min-stack", &trace.min_stack,
+ "Set the minimum stack depth when parsing the callchain, "
+ "anything below the specified depth will be ignored."),
+ OPT_UINTEGER(0, "max-stack", &trace.max_stack,
+ "Set the maximum stack depth when parsing the callchain, "
+ "anything beyond the specified depth will be ignored. "
+ "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
+ OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
+ "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
+ OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
+ "per thread proc mmap processing timeout in ms"),
+ OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
+ trace__parse_cgroups),
+ OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
+ "ms to wait before starting measurement after program "
+ "start"),
+ OPT_END()
+ };
+ bool __maybe_unused max_stack_user_set = true;
+ bool mmap_pages_user_set = true;
+ struct perf_evsel *evsel;
+ const char * const trace_subcommands[] = { "record", NULL };
+ int err = -1;
+ char bf[BUFSIZ];
+
+ signal(SIGSEGV, sighandler_dump_stack);
+ signal(SIGFPE, sighandler_dump_stack);
+
+ trace.evlist = perf_evlist__new();
+ trace.sctbl = syscalltbl__new();
+
+ if (trace.evlist == NULL || trace.sctbl == NULL) {
+ pr_err("Not enough memory to run!\n");
+ err = -ENOMEM;
+ goto out;
+ }
+
+ argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
+ trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
+
+ if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
+ usage_with_options_msg(trace_usage, trace_options,
+ "cgroup monitoring only available in system-wide mode");
+ }
+
+ evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
+ if (IS_ERR(evsel)) {
+ bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
+ pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
+ goto out;
+ }
+
+ if (evsel) {
+ if (perf_evsel__init_augmented_syscall_tp(evsel) ||
+ perf_evsel__init_augmented_syscall_tp_args(evsel))
+ goto out;
+ trace.syscalls.events.augmented = evsel;
+ }
+
+ err = bpf__setup_stdout(trace.evlist);
+ if (err) {
+ bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
+ pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
+ goto out;
+ }
+
+ err = -1;
+
+ if (trace.trace_pgfaults) {
+ trace.opts.sample_address = true;
+ trace.opts.sample_time = true;
+ }
+
+ if (trace.opts.mmap_pages == UINT_MAX)
+ mmap_pages_user_set = false;
+
+ if (trace.max_stack == UINT_MAX) {
+ trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
+ max_stack_user_set = false;
+ }
+
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+ if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
+ record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
+ }
+#endif
+
+ if (callchain_param.enabled) {
+ if (!mmap_pages_user_set && geteuid() == 0)
+ trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
+
+ symbol_conf.use_callchain = true;
+ }
+
+ if (trace.evlist->nr_entries > 0) {
+ evlist__set_evsel_handler(trace.evlist, trace__event_handler);
+ if (evlist__set_syscall_tp_fields(trace.evlist)) {
+ perror("failed to set syscalls:* tracepoint fields");
+ goto out;
+ }
+ }
+
+ if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
+ return trace__record(&trace, argc-1, &argv[1]);
+
+ /* summary_only implies summary option, but don't overwrite summary if set */
+ if (trace.summary_only)
+ trace.summary = trace.summary_only;
+
+ if (!trace.trace_syscalls && !trace.trace_pgfaults &&
+ trace.evlist->nr_entries == 0 /* Was --events used? */) {
+ trace.trace_syscalls = true;
+ }
+
+ if (output_name != NULL) {
+ err = trace__open_output(&trace, output_name);
+ if (err < 0) {
+ perror("failed to create output file");
+ goto out;
+ }
+ }
+
+ err = target__validate(&trace.opts.target);
+ if (err) {
+ target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+ fprintf(trace.output, "%s", bf);
+ goto out_close;
+ }
+
+ err = target__parse_uid(&trace.opts.target);
+ if (err) {
+ target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+ fprintf(trace.output, "%s", bf);
+ goto out_close;
+ }
+
+ if (!argc && target__none(&trace.opts.target))
+ trace.opts.target.system_wide = true;
+
+ if (input_name)
+ err = trace__replay(&trace);
+ else
+ err = trace__run(&trace, argc, argv);
+
+out_close:
+ if (output_name != NULL)
+ fclose(trace.output);
+out:
+ return err;
+}