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0df6ade711
evlist contains cpus and all_cpus. all_cpus is the union of the cpu maps of all evsels. For non-task targets, cpus is set to be cpus requested from the command line, defaulting to all online cpus if no cpus are specified. For an uncore event, all_cpus may be just CPU 0 or every online CPU. This causes all_cpus to have fewer values than the cpus variable which is confusing given the 'all' in the name. To try to make the behavior clearer, rename cpus to user_requested_cpus and add comments on the two struct variables. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Antonov <alexander.antonov@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: German Gomez <german.gomez@arm.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Fastabend <john.fastabend@gmail.com> Cc: John Garry <john.garry@huawei.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Riccardo Mancini <rickyman7@gmail.com> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: netdev@vger.kernel.org Link: http://lore.kernel.org/lkml/20220328232648.2127340-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2287 lines
55 KiB
C
2287 lines
55 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "util/cgroup.h"
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#include "util/data.h"
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#include "util/debug.h"
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#include "util/dso.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include "util/machine.h"
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#include "util/map.h"
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#include "util/map_symbol.h"
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#include "util/branch.h"
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#include "util/memswap.h"
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#include "util/namespaces.h"
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#include "util/session.h"
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#include "util/stat.h"
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#include "util/symbol.h"
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#include "util/synthetic-events.h"
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#include "util/target.h"
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#include "util/time-utils.h"
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#include <linux/bitops.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/zalloc.h>
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#include <linux/perf_event.h>
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#include <asm/bug.h>
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#include <perf/evsel.h>
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#include <perf/cpumap.h>
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#include <internal/lib.h> // page_size
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#include <internal/threadmap.h>
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#include <perf/threadmap.h>
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#include <symbol/kallsyms.h>
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#include <dirent.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
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#include <api/fs/fs.h>
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#include <api/io.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
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unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
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int perf_tool__process_synth_event(struct perf_tool *tool,
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union perf_event *event,
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struct machine *machine,
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perf_event__handler_t process)
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{
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struct perf_sample synth_sample = {
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.pid = -1,
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.tid = -1,
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.time = -1,
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.stream_id = -1,
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.cpu = -1,
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.period = 1,
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.cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
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};
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return process(tool, event, &synth_sample, machine);
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};
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/*
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* Assumes that the first 4095 bytes of /proc/pid/stat contains
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* the comm, tgid and ppid.
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*/
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static int perf_event__get_comm_ids(pid_t pid, pid_t tid, char *comm, size_t len,
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pid_t *tgid, pid_t *ppid, bool *kernel)
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{
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char bf[4096];
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int fd;
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size_t size = 0;
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ssize_t n;
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char *name, *tgids, *ppids, *vmpeak, *threads;
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*tgid = -1;
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*ppid = -1;
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if (pid)
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snprintf(bf, sizeof(bf), "/proc/%d/task/%d/status", pid, tid);
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else
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snprintf(bf, sizeof(bf), "/proc/%d/status", tid);
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fd = open(bf, O_RDONLY);
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if (fd < 0) {
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pr_debug("couldn't open %s\n", bf);
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return -1;
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}
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n = read(fd, bf, sizeof(bf) - 1);
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close(fd);
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if (n <= 0) {
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pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
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tid);
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return -1;
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}
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bf[n] = '\0';
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name = strstr(bf, "Name:");
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tgids = strstr(name ?: bf, "Tgid:");
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ppids = strstr(tgids ?: bf, "PPid:");
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vmpeak = strstr(ppids ?: bf, "VmPeak:");
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if (vmpeak)
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threads = NULL;
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else
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threads = strstr(ppids ?: bf, "Threads:");
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if (name) {
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char *nl;
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name = skip_spaces(name + 5); /* strlen("Name:") */
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nl = strchr(name, '\n');
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if (nl)
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*nl = '\0';
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size = strlen(name);
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if (size >= len)
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size = len - 1;
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memcpy(comm, name, size);
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comm[size] = '\0';
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} else {
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pr_debug("Name: string not found for pid %d\n", tid);
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}
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if (tgids) {
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tgids += 5; /* strlen("Tgid:") */
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*tgid = atoi(tgids);
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} else {
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pr_debug("Tgid: string not found for pid %d\n", tid);
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}
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if (ppids) {
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ppids += 5; /* strlen("PPid:") */
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*ppid = atoi(ppids);
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} else {
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pr_debug("PPid: string not found for pid %d\n", tid);
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}
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if (!vmpeak && threads)
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*kernel = true;
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else
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*kernel = false;
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return 0;
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}
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static int perf_event__prepare_comm(union perf_event *event, pid_t pid, pid_t tid,
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struct machine *machine,
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pid_t *tgid, pid_t *ppid, bool *kernel)
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{
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size_t size;
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*ppid = -1;
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memset(&event->comm, 0, sizeof(event->comm));
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if (machine__is_host(machine)) {
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if (perf_event__get_comm_ids(pid, tid, event->comm.comm,
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sizeof(event->comm.comm),
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tgid, ppid, kernel) != 0) {
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return -1;
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}
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} else {
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*tgid = machine->pid;
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}
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if (*tgid < 0)
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return -1;
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event->comm.pid = *tgid;
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event->comm.header.type = PERF_RECORD_COMM;
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size = strlen(event->comm.comm) + 1;
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size = PERF_ALIGN(size, sizeof(u64));
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memset(event->comm.comm + size, 0, machine->id_hdr_size);
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event->comm.header.size = (sizeof(event->comm) -
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(sizeof(event->comm.comm) - size) +
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machine->id_hdr_size);
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event->comm.tid = tid;
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return 0;
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}
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pid_t perf_event__synthesize_comm(struct perf_tool *tool,
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union perf_event *event, pid_t pid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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pid_t tgid, ppid;
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bool kernel_thread;
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if (perf_event__prepare_comm(event, 0, pid, machine, &tgid, &ppid,
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&kernel_thread) != 0)
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return -1;
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return tgid;
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}
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static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
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struct perf_ns_link_info *ns_link_info)
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{
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struct stat64 st;
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char proc_ns[128];
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sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
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if (stat64(proc_ns, &st) == 0) {
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ns_link_info->dev = st.st_dev;
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ns_link_info->ino = st.st_ino;
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}
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}
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int perf_event__synthesize_namespaces(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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u32 idx;
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struct perf_ns_link_info *ns_link_info;
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if (!tool || !tool->namespace_events)
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return 0;
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memset(&event->namespaces, 0, (sizeof(event->namespaces) +
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
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machine->id_hdr_size));
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event->namespaces.pid = tgid;
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event->namespaces.tid = pid;
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event->namespaces.nr_namespaces = NR_NAMESPACES;
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ns_link_info = event->namespaces.link_info;
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for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
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perf_event__get_ns_link_info(pid, perf_ns__name(idx),
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&ns_link_info[idx]);
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event->namespaces.header.type = PERF_RECORD_NAMESPACES;
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event->namespaces.header.size = (sizeof(event->namespaces) +
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
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machine->id_hdr_size);
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return 0;
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}
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static int perf_event__synthesize_fork(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid, pid_t ppid,
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perf_event__handler_t process,
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struct machine *machine)
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{
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memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
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/*
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* for main thread set parent to ppid from status file. For other
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* threads set parent pid to main thread. ie., assume main thread
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* spawns all threads in a process
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*/
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if (tgid == pid) {
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event->fork.ppid = ppid;
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event->fork.ptid = ppid;
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} else {
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event->fork.ppid = tgid;
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event->fork.ptid = tgid;
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}
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event->fork.pid = tgid;
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event->fork.tid = pid;
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event->fork.header.type = PERF_RECORD_FORK;
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event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
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event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
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return -1;
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return 0;
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}
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static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
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u32 *prot, u32 *flags, __u64 *offset,
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u32 *maj, u32 *min,
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__u64 *inode,
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ssize_t pathname_size, char *pathname)
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{
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__u64 temp;
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int ch;
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char *start_pathname = pathname;
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if (io__get_hex(io, start) != '-')
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return false;
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if (io__get_hex(io, end) != ' ')
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return false;
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/* map protection and flags bits */
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*prot = 0;
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ch = io__get_char(io);
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if (ch == 'r')
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*prot |= PROT_READ;
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else if (ch != '-')
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return false;
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ch = io__get_char(io);
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if (ch == 'w')
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*prot |= PROT_WRITE;
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else if (ch != '-')
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return false;
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ch = io__get_char(io);
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if (ch == 'x')
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*prot |= PROT_EXEC;
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else if (ch != '-')
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return false;
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ch = io__get_char(io);
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if (ch == 's')
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*flags = MAP_SHARED;
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else if (ch == 'p')
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*flags = MAP_PRIVATE;
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else
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return false;
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if (io__get_char(io) != ' ')
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return false;
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if (io__get_hex(io, offset) != ' ')
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return false;
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if (io__get_hex(io, &temp) != ':')
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return false;
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*maj = temp;
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if (io__get_hex(io, &temp) != ' ')
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return false;
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*min = temp;
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ch = io__get_dec(io, inode);
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if (ch != ' ') {
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*pathname = '\0';
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return ch == '\n';
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}
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do {
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ch = io__get_char(io);
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} while (ch == ' ');
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while (true) {
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if (ch < 0)
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return false;
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if (ch == '\0' || ch == '\n' ||
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(pathname + 1 - start_pathname) >= pathname_size) {
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*pathname = '\0';
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return true;
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}
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*pathname++ = ch;
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ch = io__get_char(io);
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}
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}
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static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event,
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bool is_kernel)
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{
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struct build_id bid;
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int rc;
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if (is_kernel)
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rc = sysfs__read_build_id("/sys/kernel/notes", &bid);
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else
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rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1;
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if (rc == 0) {
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memcpy(event->build_id, bid.data, sizeof(bid.data));
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event->build_id_size = (u8) bid.size;
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event->header.misc |= PERF_RECORD_MISC_MMAP_BUILD_ID;
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event->__reserved_1 = 0;
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event->__reserved_2 = 0;
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} else {
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if (event->filename[0] == '/') {
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pr_debug2("Failed to read build ID for %s\n",
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event->filename);
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}
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}
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}
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int perf_event__synthesize_mmap_events(struct perf_tool *tool,
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union perf_event *event,
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pid_t pid, pid_t tgid,
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perf_event__handler_t process,
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struct machine *machine,
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bool mmap_data)
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{
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unsigned long long t;
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char bf[BUFSIZ];
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struct io io;
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bool truncation = false;
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unsigned long long timeout = proc_map_timeout * 1000000ULL;
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int rc = 0;
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const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
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int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
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if (machine__is_default_guest(machine))
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return 0;
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snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
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machine->root_dir, pid, pid);
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io.fd = open(bf, O_RDONLY, 0);
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if (io.fd < 0) {
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/*
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* We raced with a task exiting - just return:
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*/
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pr_debug("couldn't open %s\n", bf);
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return -1;
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}
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io__init(&io, io.fd, bf, sizeof(bf));
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event->header.type = PERF_RECORD_MMAP2;
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t = rdclock();
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while (!io.eof) {
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static const char anonstr[] = "//anon";
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size_t size, aligned_size;
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/* ensure null termination since stack will be reused. */
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event->mmap2.filename[0] = '\0';
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/* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
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if (!read_proc_maps_line(&io,
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&event->mmap2.start,
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&event->mmap2.len,
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&event->mmap2.prot,
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&event->mmap2.flags,
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&event->mmap2.pgoff,
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&event->mmap2.maj,
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&event->mmap2.min,
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&event->mmap2.ino,
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sizeof(event->mmap2.filename),
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event->mmap2.filename))
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continue;
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if ((rdclock() - t) > timeout) {
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pr_warning("Reading %s/proc/%d/task/%d/maps time out. "
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"You may want to increase "
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"the time limit by --proc-map-timeout\n",
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machine->root_dir, pid, pid);
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truncation = true;
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goto out;
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}
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event->mmap2.ino_generation = 0;
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/*
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* Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
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*/
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if (machine__is_host(machine))
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event->header.misc = PERF_RECORD_MISC_USER;
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else
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event->header.misc = PERF_RECORD_MISC_GUEST_USER;
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if ((event->mmap2.prot & PROT_EXEC) == 0) {
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if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
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|
continue;
|
|
|
|
event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
|
|
}
|
|
|
|
out:
|
|
if (truncation)
|
|
event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
|
|
|
|
if (!strcmp(event->mmap2.filename, ""))
|
|
strcpy(event->mmap2.filename, anonstr);
|
|
|
|
if (hugetlbfs_mnt_len &&
|
|
!strncmp(event->mmap2.filename, hugetlbfs_mnt,
|
|
hugetlbfs_mnt_len)) {
|
|
strcpy(event->mmap2.filename, anonstr);
|
|
event->mmap2.flags |= MAP_HUGETLB;
|
|
}
|
|
|
|
size = strlen(event->mmap2.filename) + 1;
|
|
aligned_size = PERF_ALIGN(size, sizeof(u64));
|
|
event->mmap2.len -= event->mmap.start;
|
|
event->mmap2.header.size = (sizeof(event->mmap2) -
|
|
(sizeof(event->mmap2.filename) - aligned_size));
|
|
memset(event->mmap2.filename + size, 0, machine->id_hdr_size +
|
|
(aligned_size - size));
|
|
event->mmap2.header.size += machine->id_hdr_size;
|
|
event->mmap2.pid = tgid;
|
|
event->mmap2.tid = pid;
|
|
|
|
if (symbol_conf.buildid_mmap2)
|
|
perf_record_mmap2__read_build_id(&event->mmap2, false);
|
|
|
|
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
|
|
rc = -1;
|
|
break;
|
|
}
|
|
|
|
if (truncation)
|
|
break;
|
|
}
|
|
|
|
close(io.fd);
|
|
return rc;
|
|
}
|
|
|
|
#ifdef HAVE_FILE_HANDLE
|
|
static int perf_event__synthesize_cgroup(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
char *path, size_t mount_len,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
|
|
size_t path_len = strlen(path) - mount_len + 1;
|
|
struct {
|
|
struct file_handle fh;
|
|
uint64_t cgroup_id;
|
|
} handle;
|
|
int mount_id;
|
|
|
|
while (path_len % sizeof(u64))
|
|
path[mount_len + path_len++] = '\0';
|
|
|
|
memset(&event->cgroup, 0, event_size);
|
|
|
|
event->cgroup.header.type = PERF_RECORD_CGROUP;
|
|
event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
|
|
|
|
handle.fh.handle_bytes = sizeof(handle.cgroup_id);
|
|
if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) {
|
|
pr_debug("stat failed: %s\n", path);
|
|
return -1;
|
|
}
|
|
|
|
event->cgroup.id = handle.cgroup_id;
|
|
strncpy(event->cgroup.path, path + mount_len, path_len);
|
|
memset(event->cgroup.path + path_len, 0, machine->id_hdr_size);
|
|
|
|
if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
|
|
pr_debug("process synth event failed\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
|
|
union perf_event *event,
|
|
char *path, size_t mount_len,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
size_t pos = strlen(path);
|
|
DIR *d;
|
|
struct dirent *dent;
|
|
int ret = 0;
|
|
|
|
if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
|
|
process, machine) < 0)
|
|
return -1;
|
|
|
|
d = opendir(path);
|
|
if (d == NULL) {
|
|
pr_debug("failed to open directory: %s\n", path);
|
|
return -1;
|
|
}
|
|
|
|
while ((dent = readdir(d)) != NULL) {
|
|
if (dent->d_type != DT_DIR)
|
|
continue;
|
|
if (!strcmp(dent->d_name, ".") ||
|
|
!strcmp(dent->d_name, ".."))
|
|
continue;
|
|
|
|
/* any sane path should be less than PATH_MAX */
|
|
if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
|
|
continue;
|
|
|
|
if (path[pos - 1] != '/')
|
|
strcat(path, "/");
|
|
strcat(path, dent->d_name);
|
|
|
|
ret = perf_event__walk_cgroup_tree(tool, event, path,
|
|
mount_len, process, machine);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
path[pos] = '\0';
|
|
}
|
|
|
|
closedir(d);
|
|
return ret;
|
|
}
|
|
|
|
int perf_event__synthesize_cgroups(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
union perf_event event;
|
|
char cgrp_root[PATH_MAX];
|
|
size_t mount_len; /* length of mount point in the path */
|
|
|
|
if (!tool || !tool->cgroup_events)
|
|
return 0;
|
|
|
|
if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
|
|
pr_debug("cannot find cgroup mount point\n");
|
|
return -1;
|
|
}
|
|
|
|
mount_len = strlen(cgrp_root);
|
|
/* make sure the path starts with a slash (after mount point) */
|
|
strcat(cgrp_root, "/");
|
|
|
|
if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
|
|
process, machine) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
|
|
perf_event__handler_t process __maybe_unused,
|
|
struct machine *machine __maybe_unused)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
int rc = 0;
|
|
struct map *pos;
|
|
struct maps *maps = machine__kernel_maps(machine);
|
|
union perf_event *event;
|
|
size_t size = symbol_conf.buildid_mmap2 ?
|
|
sizeof(event->mmap2) : sizeof(event->mmap);
|
|
|
|
event = zalloc(size + machine->id_hdr_size);
|
|
if (event == NULL) {
|
|
pr_debug("Not enough memory synthesizing mmap event "
|
|
"for kernel modules\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* kernel uses 0 for user space maps, see kernel/perf_event.c
|
|
* __perf_event_mmap
|
|
*/
|
|
if (machine__is_host(machine))
|
|
event->header.misc = PERF_RECORD_MISC_KERNEL;
|
|
else
|
|
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
|
|
|
|
maps__for_each_entry(maps, pos) {
|
|
if (!__map__is_kmodule(pos))
|
|
continue;
|
|
|
|
if (symbol_conf.buildid_mmap2) {
|
|
size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
|
|
event->mmap2.header.type = PERF_RECORD_MMAP2;
|
|
event->mmap2.header.size = (sizeof(event->mmap2) -
|
|
(sizeof(event->mmap2.filename) - size));
|
|
memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
|
|
event->mmap2.header.size += machine->id_hdr_size;
|
|
event->mmap2.start = pos->start;
|
|
event->mmap2.len = pos->end - pos->start;
|
|
event->mmap2.pid = machine->pid;
|
|
|
|
memcpy(event->mmap2.filename, pos->dso->long_name,
|
|
pos->dso->long_name_len + 1);
|
|
|
|
perf_record_mmap2__read_build_id(&event->mmap2, false);
|
|
} else {
|
|
size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
|
|
event->mmap.header.type = PERF_RECORD_MMAP;
|
|
event->mmap.header.size = (sizeof(event->mmap) -
|
|
(sizeof(event->mmap.filename) - size));
|
|
memset(event->mmap.filename + size, 0, machine->id_hdr_size);
|
|
event->mmap.header.size += machine->id_hdr_size;
|
|
event->mmap.start = pos->start;
|
|
event->mmap.len = pos->end - pos->start;
|
|
event->mmap.pid = machine->pid;
|
|
|
|
memcpy(event->mmap.filename, pos->dso->long_name,
|
|
pos->dso->long_name_len + 1);
|
|
}
|
|
|
|
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
|
|
rc = -1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
free(event);
|
|
return rc;
|
|
}
|
|
|
|
static int filter_task(const struct dirent *dirent)
|
|
{
|
|
return isdigit(dirent->d_name[0]);
|
|
}
|
|
|
|
static int __event__synthesize_thread(union perf_event *comm_event,
|
|
union perf_event *mmap_event,
|
|
union perf_event *fork_event,
|
|
union perf_event *namespaces_event,
|
|
pid_t pid, int full, perf_event__handler_t process,
|
|
struct perf_tool *tool, struct machine *machine,
|
|
bool needs_mmap, bool mmap_data)
|
|
{
|
|
char filename[PATH_MAX];
|
|
struct dirent **dirent;
|
|
pid_t tgid, ppid;
|
|
int rc = 0;
|
|
int i, n;
|
|
|
|
/* special case: only send one comm event using passed in pid */
|
|
if (!full) {
|
|
tgid = perf_event__synthesize_comm(tool, comm_event, pid,
|
|
process, machine);
|
|
|
|
if (tgid == -1)
|
|
return -1;
|
|
|
|
if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
|
|
tgid, process, machine) < 0)
|
|
return -1;
|
|
|
|
/*
|
|
* send mmap only for thread group leader
|
|
* see thread__init_maps()
|
|
*/
|
|
if (pid == tgid && needs_mmap &&
|
|
perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
|
|
process, machine, mmap_data))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (machine__is_default_guest(machine))
|
|
return 0;
|
|
|
|
snprintf(filename, sizeof(filename), "%s/proc/%d/task",
|
|
machine->root_dir, pid);
|
|
|
|
n = scandir(filename, &dirent, filter_task, alphasort);
|
|
if (n < 0)
|
|
return n;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
char *end;
|
|
pid_t _pid;
|
|
bool kernel_thread = false;
|
|
|
|
_pid = strtol(dirent[i]->d_name, &end, 10);
|
|
if (*end)
|
|
continue;
|
|
|
|
rc = -1;
|
|
if (perf_event__prepare_comm(comm_event, pid, _pid, machine,
|
|
&tgid, &ppid, &kernel_thread) != 0)
|
|
break;
|
|
|
|
if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
|
|
ppid, process, machine) < 0)
|
|
break;
|
|
|
|
if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
|
|
tgid, process, machine) < 0)
|
|
break;
|
|
|
|
/*
|
|
* Send the prepared comm event
|
|
*/
|
|
if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
|
|
break;
|
|
|
|
rc = 0;
|
|
if (_pid == pid && !kernel_thread && needs_mmap) {
|
|
/* process the parent's maps too */
|
|
rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
|
|
process, machine, mmap_data);
|
|
if (rc)
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < n; i++)
|
|
zfree(&dirent[i]);
|
|
free(dirent);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int perf_event__synthesize_thread_map(struct perf_tool *tool,
|
|
struct perf_thread_map *threads,
|
|
perf_event__handler_t process,
|
|
struct machine *machine,
|
|
bool needs_mmap, bool mmap_data)
|
|
{
|
|
union perf_event *comm_event, *mmap_event, *fork_event;
|
|
union perf_event *namespaces_event;
|
|
int err = -1, thread, j;
|
|
|
|
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
|
|
if (comm_event == NULL)
|
|
goto out;
|
|
|
|
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
|
|
if (mmap_event == NULL)
|
|
goto out_free_comm;
|
|
|
|
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
|
|
if (fork_event == NULL)
|
|
goto out_free_mmap;
|
|
|
|
namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
|
|
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
|
|
machine->id_hdr_size);
|
|
if (namespaces_event == NULL)
|
|
goto out_free_fork;
|
|
|
|
err = 0;
|
|
for (thread = 0; thread < threads->nr; ++thread) {
|
|
if (__event__synthesize_thread(comm_event, mmap_event,
|
|
fork_event, namespaces_event,
|
|
perf_thread_map__pid(threads, thread), 0,
|
|
process, tool, machine,
|
|
needs_mmap, mmap_data)) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* comm.pid is set to thread group id by
|
|
* perf_event__synthesize_comm
|
|
*/
|
|
if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
|
|
bool need_leader = true;
|
|
|
|
/* is thread group leader in thread_map? */
|
|
for (j = 0; j < threads->nr; ++j) {
|
|
if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
|
|
need_leader = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* if not, generate events for it */
|
|
if (need_leader &&
|
|
__event__synthesize_thread(comm_event, mmap_event,
|
|
fork_event, namespaces_event,
|
|
comm_event->comm.pid, 0,
|
|
process, tool, machine,
|
|
needs_mmap, mmap_data)) {
|
|
err = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
free(namespaces_event);
|
|
out_free_fork:
|
|
free(fork_event);
|
|
out_free_mmap:
|
|
free(mmap_event);
|
|
out_free_comm:
|
|
free(comm_event);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int __perf_event__synthesize_threads(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct machine *machine,
|
|
bool needs_mmap,
|
|
bool mmap_data,
|
|
struct dirent **dirent,
|
|
int start,
|
|
int num)
|
|
{
|
|
union perf_event *comm_event, *mmap_event, *fork_event;
|
|
union perf_event *namespaces_event;
|
|
int err = -1;
|
|
char *end;
|
|
pid_t pid;
|
|
int i;
|
|
|
|
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
|
|
if (comm_event == NULL)
|
|
goto out;
|
|
|
|
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
|
|
if (mmap_event == NULL)
|
|
goto out_free_comm;
|
|
|
|
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
|
|
if (fork_event == NULL)
|
|
goto out_free_mmap;
|
|
|
|
namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
|
|
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
|
|
machine->id_hdr_size);
|
|
if (namespaces_event == NULL)
|
|
goto out_free_fork;
|
|
|
|
for (i = start; i < start + num; i++) {
|
|
if (!isdigit(dirent[i]->d_name[0]))
|
|
continue;
|
|
|
|
pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
|
|
/* only interested in proper numerical dirents */
|
|
if (*end)
|
|
continue;
|
|
/*
|
|
* We may race with exiting thread, so don't stop just because
|
|
* one thread couldn't be synthesized.
|
|
*/
|
|
__event__synthesize_thread(comm_event, mmap_event, fork_event,
|
|
namespaces_event, pid, 1, process,
|
|
tool, machine, needs_mmap, mmap_data);
|
|
}
|
|
err = 0;
|
|
|
|
free(namespaces_event);
|
|
out_free_fork:
|
|
free(fork_event);
|
|
out_free_mmap:
|
|
free(mmap_event);
|
|
out_free_comm:
|
|
free(comm_event);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
struct synthesize_threads_arg {
|
|
struct perf_tool *tool;
|
|
perf_event__handler_t process;
|
|
struct machine *machine;
|
|
bool needs_mmap;
|
|
bool mmap_data;
|
|
struct dirent **dirent;
|
|
int num;
|
|
int start;
|
|
};
|
|
|
|
static void *synthesize_threads_worker(void *arg)
|
|
{
|
|
struct synthesize_threads_arg *args = arg;
|
|
|
|
__perf_event__synthesize_threads(args->tool, args->process,
|
|
args->machine,
|
|
args->needs_mmap, args->mmap_data,
|
|
args->dirent,
|
|
args->start, args->num);
|
|
return NULL;
|
|
}
|
|
|
|
int perf_event__synthesize_threads(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct machine *machine,
|
|
bool needs_mmap, bool mmap_data,
|
|
unsigned int nr_threads_synthesize)
|
|
{
|
|
struct synthesize_threads_arg *args = NULL;
|
|
pthread_t *synthesize_threads = NULL;
|
|
char proc_path[PATH_MAX];
|
|
struct dirent **dirent;
|
|
int num_per_thread;
|
|
int m, n, i, j;
|
|
int thread_nr;
|
|
int base = 0;
|
|
int err = -1;
|
|
|
|
|
|
if (machine__is_default_guest(machine))
|
|
return 0;
|
|
|
|
snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
|
|
n = scandir(proc_path, &dirent, filter_task, alphasort);
|
|
if (n < 0)
|
|
return err;
|
|
|
|
if (nr_threads_synthesize == UINT_MAX)
|
|
thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
|
|
else
|
|
thread_nr = nr_threads_synthesize;
|
|
|
|
if (thread_nr <= 1) {
|
|
err = __perf_event__synthesize_threads(tool, process,
|
|
machine,
|
|
needs_mmap, mmap_data,
|
|
dirent, base, n);
|
|
goto free_dirent;
|
|
}
|
|
if (thread_nr > n)
|
|
thread_nr = n;
|
|
|
|
synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
|
|
if (synthesize_threads == NULL)
|
|
goto free_dirent;
|
|
|
|
args = calloc(sizeof(*args), thread_nr);
|
|
if (args == NULL)
|
|
goto free_threads;
|
|
|
|
num_per_thread = n / thread_nr;
|
|
m = n % thread_nr;
|
|
for (i = 0; i < thread_nr; i++) {
|
|
args[i].tool = tool;
|
|
args[i].process = process;
|
|
args[i].machine = machine;
|
|
args[i].needs_mmap = needs_mmap;
|
|
args[i].mmap_data = mmap_data;
|
|
args[i].dirent = dirent;
|
|
}
|
|
for (i = 0; i < m; i++) {
|
|
args[i].num = num_per_thread + 1;
|
|
args[i].start = i * args[i].num;
|
|
}
|
|
if (i != 0)
|
|
base = args[i-1].start + args[i-1].num;
|
|
for (j = i; j < thread_nr; j++) {
|
|
args[j].num = num_per_thread;
|
|
args[j].start = base + (j - i) * args[i].num;
|
|
}
|
|
|
|
for (i = 0; i < thread_nr; i++) {
|
|
if (pthread_create(&synthesize_threads[i], NULL,
|
|
synthesize_threads_worker, &args[i]))
|
|
goto out_join;
|
|
}
|
|
err = 0;
|
|
out_join:
|
|
for (i = 0; i < thread_nr; i++)
|
|
pthread_join(synthesize_threads[i], NULL);
|
|
free(args);
|
|
free_threads:
|
|
free(synthesize_threads);
|
|
free_dirent:
|
|
for (i = 0; i < n; i++)
|
|
zfree(&dirent[i]);
|
|
free(dirent);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
|
|
perf_event__handler_t process __maybe_unused,
|
|
struct machine *machine __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
union perf_event *event;
|
|
size_t size = symbol_conf.buildid_mmap2 ?
|
|
sizeof(event->mmap2) : sizeof(event->mmap);
|
|
struct map *map = machine__kernel_map(machine);
|
|
struct kmap *kmap;
|
|
int err;
|
|
|
|
if (map == NULL)
|
|
return -1;
|
|
|
|
kmap = map__kmap(map);
|
|
if (!kmap->ref_reloc_sym)
|
|
return -1;
|
|
|
|
/*
|
|
* We should get this from /sys/kernel/sections/.text, but till that is
|
|
* available use this, and after it is use this as a fallback for older
|
|
* kernels.
|
|
*/
|
|
event = zalloc(size + machine->id_hdr_size);
|
|
if (event == NULL) {
|
|
pr_debug("Not enough memory synthesizing mmap event "
|
|
"for kernel modules\n");
|
|
return -1;
|
|
}
|
|
|
|
if (machine__is_host(machine)) {
|
|
/*
|
|
* kernel uses PERF_RECORD_MISC_USER for user space maps,
|
|
* see kernel/perf_event.c __perf_event_mmap
|
|
*/
|
|
event->header.misc = PERF_RECORD_MISC_KERNEL;
|
|
} else {
|
|
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
|
|
}
|
|
|
|
if (symbol_conf.buildid_mmap2) {
|
|
size = snprintf(event->mmap2.filename, sizeof(event->mmap2.filename),
|
|
"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
|
|
size = PERF_ALIGN(size, sizeof(u64));
|
|
event->mmap2.header.type = PERF_RECORD_MMAP2;
|
|
event->mmap2.header.size = (sizeof(event->mmap2) -
|
|
(sizeof(event->mmap2.filename) - size) + machine->id_hdr_size);
|
|
event->mmap2.pgoff = kmap->ref_reloc_sym->addr;
|
|
event->mmap2.start = map->start;
|
|
event->mmap2.len = map->end - event->mmap.start;
|
|
event->mmap2.pid = machine->pid;
|
|
|
|
perf_record_mmap2__read_build_id(&event->mmap2, true);
|
|
} else {
|
|
size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
|
|
"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
|
|
size = PERF_ALIGN(size, sizeof(u64));
|
|
event->mmap.header.type = PERF_RECORD_MMAP;
|
|
event->mmap.header.size = (sizeof(event->mmap) -
|
|
(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
|
|
event->mmap.pgoff = kmap->ref_reloc_sym->addr;
|
|
event->mmap.start = map->start;
|
|
event->mmap.len = map->end - event->mmap.start;
|
|
event->mmap.pid = machine->pid;
|
|
}
|
|
|
|
err = perf_tool__process_synth_event(tool, event, machine, process);
|
|
free(event);
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
int err;
|
|
|
|
err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return perf_event__synthesize_extra_kmaps(tool, process, machine);
|
|
}
|
|
|
|
int perf_event__synthesize_thread_map2(struct perf_tool *tool,
|
|
struct perf_thread_map *threads,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
union perf_event *event;
|
|
int i, err, size;
|
|
|
|
size = sizeof(event->thread_map);
|
|
size += threads->nr * sizeof(event->thread_map.entries[0]);
|
|
|
|
event = zalloc(size);
|
|
if (!event)
|
|
return -ENOMEM;
|
|
|
|
event->header.type = PERF_RECORD_THREAD_MAP;
|
|
event->header.size = size;
|
|
event->thread_map.nr = threads->nr;
|
|
|
|
for (i = 0; i < threads->nr; i++) {
|
|
struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
|
|
char *comm = perf_thread_map__comm(threads, i);
|
|
|
|
if (!comm)
|
|
comm = (char *) "";
|
|
|
|
entry->pid = perf_thread_map__pid(threads, i);
|
|
strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
|
|
}
|
|
|
|
err = process(tool, event, NULL, machine);
|
|
|
|
free(event);
|
|
return err;
|
|
}
|
|
|
|
static void synthesize_cpus(struct cpu_map_entries *cpus,
|
|
struct perf_cpu_map *map)
|
|
{
|
|
int i, map_nr = perf_cpu_map__nr(map);
|
|
|
|
cpus->nr = map_nr;
|
|
|
|
for (i = 0; i < map_nr; i++)
|
|
cpus->cpu[i] = perf_cpu_map__cpu(map, i).cpu;
|
|
}
|
|
|
|
static void synthesize_mask(struct perf_record_record_cpu_map *mask,
|
|
struct perf_cpu_map *map, int max)
|
|
{
|
|
int i;
|
|
|
|
mask->nr = BITS_TO_LONGS(max);
|
|
mask->long_size = sizeof(long);
|
|
|
|
for (i = 0; i < perf_cpu_map__nr(map); i++)
|
|
set_bit(perf_cpu_map__cpu(map, i).cpu, mask->mask);
|
|
}
|
|
|
|
static size_t cpus_size(struct perf_cpu_map *map)
|
|
{
|
|
return sizeof(struct cpu_map_entries) + perf_cpu_map__nr(map) * sizeof(u16);
|
|
}
|
|
|
|
static size_t mask_size(struct perf_cpu_map *map, int *max)
|
|
{
|
|
int i;
|
|
|
|
*max = 0;
|
|
|
|
for (i = 0; i < perf_cpu_map__nr(map); i++) {
|
|
/* bit position of the cpu is + 1 */
|
|
int bit = perf_cpu_map__cpu(map, i).cpu + 1;
|
|
|
|
if (bit > *max)
|
|
*max = bit;
|
|
}
|
|
|
|
return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
|
|
}
|
|
|
|
void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
|
|
{
|
|
size_t size_cpus, size_mask;
|
|
bool is_dummy = perf_cpu_map__empty(map);
|
|
|
|
/*
|
|
* Both array and mask data have variable size based
|
|
* on the number of cpus and their actual values.
|
|
* The size of the 'struct perf_record_cpu_map_data' is:
|
|
*
|
|
* array = size of 'struct cpu_map_entries' +
|
|
* number of cpus * sizeof(u64)
|
|
*
|
|
* mask = size of 'struct perf_record_record_cpu_map' +
|
|
* maximum cpu bit converted to size of longs
|
|
*
|
|
* and finally + the size of 'struct perf_record_cpu_map_data'.
|
|
*/
|
|
size_cpus = cpus_size(map);
|
|
size_mask = mask_size(map, max);
|
|
|
|
if (is_dummy || (size_cpus < size_mask)) {
|
|
*size += size_cpus;
|
|
*type = PERF_CPU_MAP__CPUS;
|
|
} else {
|
|
*size += size_mask;
|
|
*type = PERF_CPU_MAP__MASK;
|
|
}
|
|
|
|
*size += sizeof(struct perf_record_cpu_map_data);
|
|
*size = PERF_ALIGN(*size, sizeof(u64));
|
|
return zalloc(*size);
|
|
}
|
|
|
|
void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
|
|
u16 type, int max)
|
|
{
|
|
data->type = type;
|
|
|
|
switch (type) {
|
|
case PERF_CPU_MAP__CPUS:
|
|
synthesize_cpus((struct cpu_map_entries *) data->data, map);
|
|
break;
|
|
case PERF_CPU_MAP__MASK:
|
|
synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
|
|
{
|
|
size_t size = sizeof(struct perf_record_cpu_map);
|
|
struct perf_record_cpu_map *event;
|
|
int max;
|
|
u16 type;
|
|
|
|
event = cpu_map_data__alloc(map, &size, &type, &max);
|
|
if (!event)
|
|
return NULL;
|
|
|
|
event->header.type = PERF_RECORD_CPU_MAP;
|
|
event->header.size = size;
|
|
event->data.type = type;
|
|
|
|
cpu_map_data__synthesize(&event->data, map, type, max);
|
|
return event;
|
|
}
|
|
|
|
int perf_event__synthesize_cpu_map(struct perf_tool *tool,
|
|
struct perf_cpu_map *map,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_record_cpu_map *event;
|
|
int err;
|
|
|
|
event = cpu_map_event__new(map);
|
|
if (!event)
|
|
return -ENOMEM;
|
|
|
|
err = process(tool, (union perf_event *) event, NULL, machine);
|
|
|
|
free(event);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_stat_config(struct perf_tool *tool,
|
|
struct perf_stat_config *config,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_record_stat_config *event;
|
|
int size, i = 0, err;
|
|
|
|
size = sizeof(*event);
|
|
size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
|
|
|
|
event = zalloc(size);
|
|
if (!event)
|
|
return -ENOMEM;
|
|
|
|
event->header.type = PERF_RECORD_STAT_CONFIG;
|
|
event->header.size = size;
|
|
event->nr = PERF_STAT_CONFIG_TERM__MAX;
|
|
|
|
#define ADD(__term, __val) \
|
|
event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
|
|
event->data[i].val = __val; \
|
|
i++;
|
|
|
|
ADD(AGGR_MODE, config->aggr_mode)
|
|
ADD(INTERVAL, config->interval)
|
|
ADD(SCALE, config->scale)
|
|
|
|
WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
|
|
"stat config terms unbalanced\n");
|
|
#undef ADD
|
|
|
|
err = process(tool, (union perf_event *) event, NULL, machine);
|
|
|
|
free(event);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_stat(struct perf_tool *tool,
|
|
struct perf_cpu cpu, u32 thread, u64 id,
|
|
struct perf_counts_values *count,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_record_stat event;
|
|
|
|
event.header.type = PERF_RECORD_STAT;
|
|
event.header.size = sizeof(event);
|
|
event.header.misc = 0;
|
|
|
|
event.id = id;
|
|
event.cpu = cpu.cpu;
|
|
event.thread = thread;
|
|
event.val = count->val;
|
|
event.ena = count->ena;
|
|
event.run = count->run;
|
|
|
|
return process(tool, (union perf_event *) &event, NULL, machine);
|
|
}
|
|
|
|
int perf_event__synthesize_stat_round(struct perf_tool *tool,
|
|
u64 evtime, u64 type,
|
|
perf_event__handler_t process,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_record_stat_round event;
|
|
|
|
event.header.type = PERF_RECORD_STAT_ROUND;
|
|
event.header.size = sizeof(event);
|
|
event.header.misc = 0;
|
|
|
|
event.time = evtime;
|
|
event.type = type;
|
|
|
|
return process(tool, (union perf_event *) &event, NULL, machine);
|
|
}
|
|
|
|
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
|
|
{
|
|
size_t sz, result = sizeof(struct perf_record_sample);
|
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_IP)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TIME)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_ADDR)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_ID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_CPU)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_PERIOD)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
result += sizeof(u64);
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
result += sizeof(u64);
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
result += sizeof(u64);
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
sz = sample->read.group.nr *
|
|
sizeof(struct sample_read_value);
|
|
result += sz;
|
|
} else {
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
sz = (sample->callchain->nr + 1) * sizeof(u64);
|
|
result += sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
result += sizeof(u32);
|
|
result += sample->raw_size;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
|
|
/* nr, hw_idx */
|
|
sz += 2 * sizeof(u64);
|
|
result += sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
if (sample->user_regs.abi) {
|
|
result += sizeof(u64);
|
|
sz = hweight64(sample->user_regs.mask) * sizeof(u64);
|
|
result += sz;
|
|
} else {
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
sz = sample->user_stack.size;
|
|
result += sizeof(u64);
|
|
if (sz) {
|
|
result += sz;
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_WEIGHT_TYPE)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_DATA_SRC)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_TRANSACTION)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_REGS_INTR) {
|
|
if (sample->intr_regs.abi) {
|
|
result += sizeof(u64);
|
|
sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
|
|
result += sz;
|
|
} else {
|
|
result += sizeof(u64);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PHYS_ADDR)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_CGROUP)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_DATA_PAGE_SIZE)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_CODE_PAGE_SIZE)
|
|
result += sizeof(u64);
|
|
|
|
if (type & PERF_SAMPLE_AUX) {
|
|
result += sizeof(u64);
|
|
result += sample->aux_sample.size;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void __weak arch_perf_synthesize_sample_weight(const struct perf_sample *data,
|
|
__u64 *array, u64 type __maybe_unused)
|
|
{
|
|
*array = data->weight;
|
|
}
|
|
|
|
int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
|
|
const struct perf_sample *sample)
|
|
{
|
|
__u64 *array;
|
|
size_t sz;
|
|
/*
|
|
* used for cross-endian analysis. See git commit 65014ab3
|
|
* for why this goofiness is needed.
|
|
*/
|
|
union u64_swap u;
|
|
|
|
array = event->sample.array;
|
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER) {
|
|
*array = sample->id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_IP) {
|
|
*array = sample->ip;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val32[0] = sample->pid;
|
|
u.val32[1] = sample->tid;
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
*array = sample->time;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ADDR) {
|
|
*array = sample->addr;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
*array = sample->id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
*array = sample->stream_id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
u.val32[0] = sample->cpu;
|
|
u.val32[1] = 0;
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PERIOD) {
|
|
*array = sample->period;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
if (read_format & PERF_FORMAT_GROUP)
|
|
*array = sample->read.group.nr;
|
|
else
|
|
*array = sample->read.one.value;
|
|
array++;
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
|
|
*array = sample->read.time_enabled;
|
|
array++;
|
|
}
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
|
|
*array = sample->read.time_running;
|
|
array++;
|
|
}
|
|
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
sz = sample->read.group.nr *
|
|
sizeof(struct sample_read_value);
|
|
memcpy(array, sample->read.group.values, sz);
|
|
array = (void *)array + sz;
|
|
} else {
|
|
*array = sample->read.one.id;
|
|
array++;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
sz = (sample->callchain->nr + 1) * sizeof(u64);
|
|
memcpy(array, sample->callchain, sz);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
u.val32[0] = sample->raw_size;
|
|
*array = u.val64;
|
|
array = (void *)array + sizeof(u32);
|
|
|
|
memcpy(array, sample->raw_data, sample->raw_size);
|
|
array = (void *)array + sample->raw_size;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry);
|
|
/* nr, hw_idx */
|
|
sz += 2 * sizeof(u64);
|
|
memcpy(array, sample->branch_stack, sz);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
if (sample->user_regs.abi) {
|
|
*array++ = sample->user_regs.abi;
|
|
sz = hweight64(sample->user_regs.mask) * sizeof(u64);
|
|
memcpy(array, sample->user_regs.regs, sz);
|
|
array = (void *)array + sz;
|
|
} else {
|
|
*array++ = 0;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
sz = sample->user_stack.size;
|
|
*array++ = sz;
|
|
if (sz) {
|
|
memcpy(array, sample->user_stack.data, sz);
|
|
array = (void *)array + sz;
|
|
*array++ = sz;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_WEIGHT_TYPE) {
|
|
arch_perf_synthesize_sample_weight(sample, array, type);
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_DATA_SRC) {
|
|
*array = sample->data_src;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TRANSACTION) {
|
|
*array = sample->transaction;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_INTR) {
|
|
if (sample->intr_regs.abi) {
|
|
*array++ = sample->intr_regs.abi;
|
|
sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
|
|
memcpy(array, sample->intr_regs.regs, sz);
|
|
array = (void *)array + sz;
|
|
} else {
|
|
*array++ = 0;
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PHYS_ADDR) {
|
|
*array = sample->phys_addr;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CGROUP) {
|
|
*array = sample->cgroup;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
|
|
*array = sample->data_page_size;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
|
|
*array = sample->code_page_size;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_AUX) {
|
|
sz = sample->aux_sample.size;
|
|
*array++ = sz;
|
|
memcpy(array, sample->aux_sample.data, sz);
|
|
array = (void *)array + sz;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
|
|
struct evlist *evlist, struct machine *machine)
|
|
{
|
|
union perf_event *ev;
|
|
struct evsel *evsel;
|
|
size_t nr = 0, i = 0, sz, max_nr, n;
|
|
int err;
|
|
|
|
pr_debug2("Synthesizing id index\n");
|
|
|
|
max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
|
|
sizeof(struct id_index_entry);
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
nr += evsel->core.ids;
|
|
|
|
n = nr > max_nr ? max_nr : nr;
|
|
sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
|
|
ev = zalloc(sz);
|
|
if (!ev)
|
|
return -ENOMEM;
|
|
|
|
ev->id_index.header.type = PERF_RECORD_ID_INDEX;
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = n;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
u32 j;
|
|
|
|
for (j = 0; j < evsel->core.ids; j++) {
|
|
struct id_index_entry *e;
|
|
struct perf_sample_id *sid;
|
|
|
|
if (i >= n) {
|
|
err = process(tool, ev, NULL, machine);
|
|
if (err)
|
|
goto out_err;
|
|
nr -= n;
|
|
i = 0;
|
|
}
|
|
|
|
e = &ev->id_index.entries[i++];
|
|
|
|
e->id = evsel->core.id[j];
|
|
|
|
sid = evlist__id2sid(evlist, e->id);
|
|
if (!sid) {
|
|
free(ev);
|
|
return -ENOENT;
|
|
}
|
|
|
|
e->idx = sid->idx;
|
|
e->cpu = sid->cpu.cpu;
|
|
e->tid = sid->tid;
|
|
}
|
|
}
|
|
|
|
sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = nr;
|
|
|
|
err = process(tool, ev, NULL, machine);
|
|
out_err:
|
|
free(ev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
|
|
struct target *target, struct perf_thread_map *threads,
|
|
perf_event__handler_t process, bool needs_mmap,
|
|
bool data_mmap, unsigned int nr_threads_synthesize)
|
|
{
|
|
/*
|
|
* When perf runs in non-root PID namespace, and the namespace's proc FS
|
|
* is not mounted, nsinfo__is_in_root_namespace() returns false.
|
|
* In this case, the proc FS is coming for the parent namespace, thus
|
|
* perf tool will wrongly gather process info from its parent PID
|
|
* namespace.
|
|
*
|
|
* To avoid the confusion that the perf tool runs in a child PID
|
|
* namespace but it synthesizes thread info from its parent PID
|
|
* namespace, returns failure with warning.
|
|
*/
|
|
if (!nsinfo__is_in_root_namespace()) {
|
|
pr_err("Perf runs in non-root PID namespace but it tries to ");
|
|
pr_err("gather process info from its parent PID namespace.\n");
|
|
pr_err("Please mount the proc file system properly, e.g. ");
|
|
pr_err("add the option '--mount-proc' for unshare command.\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
if (target__has_task(target))
|
|
return perf_event__synthesize_thread_map(tool, threads, process, machine,
|
|
needs_mmap, data_mmap);
|
|
else if (target__has_cpu(target))
|
|
return perf_event__synthesize_threads(tool, process, machine,
|
|
needs_mmap, data_mmap,
|
|
nr_threads_synthesize);
|
|
/* command specified */
|
|
return 0;
|
|
}
|
|
|
|
int machine__synthesize_threads(struct machine *machine, struct target *target,
|
|
struct perf_thread_map *threads, bool needs_mmap,
|
|
bool data_mmap, unsigned int nr_threads_synthesize)
|
|
{
|
|
return __machine__synthesize_threads(machine, NULL, target, threads,
|
|
perf_event__process, needs_mmap,
|
|
data_mmap, nr_threads_synthesize);
|
|
}
|
|
|
|
static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
|
|
{
|
|
struct perf_record_event_update *ev;
|
|
|
|
size += sizeof(*ev);
|
|
size = PERF_ALIGN(size, sizeof(u64));
|
|
|
|
ev = zalloc(size);
|
|
if (ev) {
|
|
ev->header.type = PERF_RECORD_EVENT_UPDATE;
|
|
ev->header.size = (u16)size;
|
|
ev->type = type;
|
|
ev->id = id;
|
|
}
|
|
return ev;
|
|
}
|
|
|
|
int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
|
|
perf_event__handler_t process)
|
|
{
|
|
size_t size = strlen(evsel->unit);
|
|
struct perf_record_event_update *ev;
|
|
int err;
|
|
|
|
ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
|
|
if (ev == NULL)
|
|
return -ENOMEM;
|
|
|
|
strlcpy(ev->data, evsel->unit, size + 1);
|
|
err = process(tool, (union perf_event *)ev, NULL, NULL);
|
|
free(ev);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
|
|
perf_event__handler_t process)
|
|
{
|
|
struct perf_record_event_update *ev;
|
|
struct perf_record_event_update_scale *ev_data;
|
|
int err;
|
|
|
|
ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
|
|
if (ev == NULL)
|
|
return -ENOMEM;
|
|
|
|
ev_data = (struct perf_record_event_update_scale *)ev->data;
|
|
ev_data->scale = evsel->scale;
|
|
err = process(tool, (union perf_event *)ev, NULL, NULL);
|
|
free(ev);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
|
|
perf_event__handler_t process)
|
|
{
|
|
struct perf_record_event_update *ev;
|
|
size_t len = strlen(evsel->name);
|
|
int err;
|
|
|
|
ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
|
|
if (ev == NULL)
|
|
return -ENOMEM;
|
|
|
|
strlcpy(ev->data, evsel->name, len + 1);
|
|
err = process(tool, (union perf_event *)ev, NULL, NULL);
|
|
free(ev);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
|
|
perf_event__handler_t process)
|
|
{
|
|
size_t size = sizeof(struct perf_record_event_update);
|
|
struct perf_record_event_update *ev;
|
|
int max, err;
|
|
u16 type;
|
|
|
|
if (!evsel->core.own_cpus)
|
|
return 0;
|
|
|
|
ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
|
|
if (!ev)
|
|
return -ENOMEM;
|
|
|
|
ev->header.type = PERF_RECORD_EVENT_UPDATE;
|
|
ev->header.size = (u16)size;
|
|
ev->type = PERF_EVENT_UPDATE__CPUS;
|
|
ev->id = evsel->core.id[0];
|
|
|
|
cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
|
|
evsel->core.own_cpus, type, max);
|
|
|
|
err = process(tool, (union perf_event *)ev, NULL, NULL);
|
|
free(ev);
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
|
|
perf_event__handler_t process)
|
|
{
|
|
struct evsel *evsel;
|
|
int err = 0;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
|
|
evsel->core.id, process);
|
|
if (err) {
|
|
pr_debug("failed to create perf header attribute\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static bool has_unit(struct evsel *evsel)
|
|
{
|
|
return evsel->unit && *evsel->unit;
|
|
}
|
|
|
|
static bool has_scale(struct evsel *evsel)
|
|
{
|
|
return evsel->scale != 1;
|
|
}
|
|
|
|
int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
|
|
perf_event__handler_t process, bool is_pipe)
|
|
{
|
|
struct evsel *evsel;
|
|
int err;
|
|
|
|
/*
|
|
* Synthesize other events stuff not carried within
|
|
* attr event - unit, scale, name
|
|
*/
|
|
evlist__for_each_entry(evsel_list, evsel) {
|
|
if (!evsel->supported)
|
|
continue;
|
|
|
|
/*
|
|
* Synthesize unit and scale only if it's defined.
|
|
*/
|
|
if (has_unit(evsel)) {
|
|
err = perf_event__synthesize_event_update_unit(tool, evsel, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize evsel unit.\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (has_scale(evsel)) {
|
|
err = perf_event__synthesize_event_update_scale(tool, evsel, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize evsel evsel.\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (evsel->core.own_cpus) {
|
|
err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize evsel cpus.\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name is needed only for pipe output,
|
|
* perf.data carries event names.
|
|
*/
|
|
if (is_pipe) {
|
|
err = perf_event__synthesize_event_update_name(tool, evsel, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize evsel name.\n");
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
|
|
u32 ids, u64 *id, perf_event__handler_t process)
|
|
{
|
|
union perf_event *ev;
|
|
size_t size;
|
|
int err;
|
|
|
|
size = sizeof(struct perf_event_attr);
|
|
size = PERF_ALIGN(size, sizeof(u64));
|
|
size += sizeof(struct perf_event_header);
|
|
size += ids * sizeof(u64);
|
|
|
|
ev = zalloc(size);
|
|
|
|
if (ev == NULL)
|
|
return -ENOMEM;
|
|
|
|
ev->attr.attr = *attr;
|
|
memcpy(ev->attr.id, id, ids * sizeof(u64));
|
|
|
|
ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
|
|
ev->attr.header.size = (u16)size;
|
|
|
|
if (ev->attr.header.size == size)
|
|
err = process(tool, ev, NULL, NULL);
|
|
else
|
|
err = -E2BIG;
|
|
|
|
free(ev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
|
|
perf_event__handler_t process)
|
|
{
|
|
union perf_event ev;
|
|
struct tracing_data *tdata;
|
|
ssize_t size = 0, aligned_size = 0, padding;
|
|
struct feat_fd ff;
|
|
|
|
/*
|
|
* We are going to store the size of the data followed
|
|
* by the data contents. Since the fd descriptor is a pipe,
|
|
* we cannot seek back to store the size of the data once
|
|
* we know it. Instead we:
|
|
*
|
|
* - write the tracing data to the temp file
|
|
* - get/write the data size to pipe
|
|
* - write the tracing data from the temp file
|
|
* to the pipe
|
|
*/
|
|
tdata = tracing_data_get(&evlist->core.entries, fd, true);
|
|
if (!tdata)
|
|
return -1;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
|
|
ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
|
|
size = tdata->size;
|
|
aligned_size = PERF_ALIGN(size, sizeof(u64));
|
|
padding = aligned_size - size;
|
|
ev.tracing_data.header.size = sizeof(ev.tracing_data);
|
|
ev.tracing_data.size = aligned_size;
|
|
|
|
process(tool, &ev, NULL, NULL);
|
|
|
|
/*
|
|
* The put function will copy all the tracing data
|
|
* stored in temp file to the pipe.
|
|
*/
|
|
tracing_data_put(tdata);
|
|
|
|
ff = (struct feat_fd){ .fd = fd };
|
|
if (write_padded(&ff, NULL, 0, padding))
|
|
return -1;
|
|
|
|
return aligned_size;
|
|
}
|
|
|
|
int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
|
|
perf_event__handler_t process, struct machine *machine)
|
|
{
|
|
union perf_event ev;
|
|
size_t len;
|
|
|
|
if (!pos->hit)
|
|
return 0;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
|
|
len = pos->long_name_len + 1;
|
|
len = PERF_ALIGN(len, NAME_ALIGN);
|
|
memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
|
|
ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
|
|
ev.build_id.header.misc = misc;
|
|
ev.build_id.pid = machine->pid;
|
|
ev.build_id.header.size = sizeof(ev.build_id) + len;
|
|
memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
|
|
|
|
return process(tool, &ev, NULL, machine);
|
|
}
|
|
|
|
int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
|
|
struct evlist *evlist, perf_event__handler_t process, bool attrs)
|
|
{
|
|
int err;
|
|
|
|
if (attrs) {
|
|
err = perf_event__synthesize_attrs(tool, evlist, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize attrs.\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
|
|
err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize thread map.\n");
|
|
return err;
|
|
}
|
|
|
|
err = perf_event__synthesize_cpu_map(tool, evlist->core.user_requested_cpus, process, NULL);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize thread map.\n");
|
|
return err;
|
|
}
|
|
|
|
err = perf_event__synthesize_stat_config(tool, config, process, NULL);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize config.\n");
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
|
|
|
|
int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
|
|
struct evlist *evlist, perf_event__handler_t process)
|
|
{
|
|
struct perf_header *header = &session->header;
|
|
struct perf_record_header_feature *fe;
|
|
struct feat_fd ff;
|
|
size_t sz, sz_hdr;
|
|
int feat, ret;
|
|
|
|
sz_hdr = sizeof(fe->header);
|
|
sz = sizeof(union perf_event);
|
|
/* get a nice alignment */
|
|
sz = PERF_ALIGN(sz, page_size);
|
|
|
|
memset(&ff, 0, sizeof(ff));
|
|
|
|
ff.buf = malloc(sz);
|
|
if (!ff.buf)
|
|
return -ENOMEM;
|
|
|
|
ff.size = sz - sz_hdr;
|
|
ff.ph = &session->header;
|
|
|
|
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
|
|
if (!feat_ops[feat].synthesize) {
|
|
pr_debug("No record header feature for header :%d\n", feat);
|
|
continue;
|
|
}
|
|
|
|
ff.offset = sizeof(*fe);
|
|
|
|
ret = feat_ops[feat].write(&ff, evlist);
|
|
if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
|
|
pr_debug("Error writing feature\n");
|
|
continue;
|
|
}
|
|
/* ff.buf may have changed due to realloc in do_write() */
|
|
fe = ff.buf;
|
|
memset(fe, 0, sizeof(*fe));
|
|
|
|
fe->feat_id = feat;
|
|
fe->header.type = PERF_RECORD_HEADER_FEATURE;
|
|
fe->header.size = ff.offset;
|
|
|
|
ret = process(tool, ff.buf, NULL, NULL);
|
|
if (ret) {
|
|
free(ff.buf);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Send HEADER_LAST_FEATURE mark. */
|
|
fe = ff.buf;
|
|
fe->feat_id = HEADER_LAST_FEATURE;
|
|
fe->header.type = PERF_RECORD_HEADER_FEATURE;
|
|
fe->header.size = sizeof(*fe);
|
|
|
|
ret = process(tool, ff.buf, NULL, NULL);
|
|
|
|
free(ff.buf);
|
|
return ret;
|
|
}
|
|
|
|
int perf_event__synthesize_for_pipe(struct perf_tool *tool,
|
|
struct perf_session *session,
|
|
struct perf_data *data,
|
|
perf_event__handler_t process)
|
|
{
|
|
int err;
|
|
int ret = 0;
|
|
struct evlist *evlist = session->evlist;
|
|
|
|
/*
|
|
* We need to synthesize events first, because some
|
|
* features works on top of them (on report side).
|
|
*/
|
|
err = perf_event__synthesize_attrs(tool, evlist, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize attrs.\n");
|
|
return err;
|
|
}
|
|
ret += err;
|
|
|
|
err = perf_event__synthesize_features(tool, session, evlist, process);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize features.\n");
|
|
return err;
|
|
}
|
|
ret += err;
|
|
|
|
if (have_tracepoints(&evlist->core.entries)) {
|
|
int fd = perf_data__fd(data);
|
|
|
|
/*
|
|
* FIXME err <= 0 here actually means that
|
|
* there were no tracepoints so its not really
|
|
* an error, just that we don't need to
|
|
* synthesize anything. We really have to
|
|
* return this more properly and also
|
|
* propagate errors that now are calling die()
|
|
*/
|
|
err = perf_event__synthesize_tracing_data(tool, fd, evlist,
|
|
process);
|
|
if (err <= 0) {
|
|
pr_err("Couldn't record tracing data.\n");
|
|
return err;
|
|
}
|
|
ret += err;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int parse_synth_opt(char *synth)
|
|
{
|
|
char *p, *q;
|
|
int ret = 0;
|
|
|
|
if (synth == NULL)
|
|
return -1;
|
|
|
|
for (q = synth; (p = strsep(&q, ",")); p = q) {
|
|
if (!strcasecmp(p, "no") || !strcasecmp(p, "none"))
|
|
return 0;
|
|
|
|
if (!strcasecmp(p, "all"))
|
|
return PERF_SYNTH_ALL;
|
|
|
|
if (!strcasecmp(p, "task"))
|
|
ret |= PERF_SYNTH_TASK;
|
|
else if (!strcasecmp(p, "mmap"))
|
|
ret |= PERF_SYNTH_TASK | PERF_SYNTH_MMAP;
|
|
else if (!strcasecmp(p, "cgroup"))
|
|
ret |= PERF_SYNTH_CGROUP;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|