![Stephane Eranian](/assets/img/avatar_default.png)
This patch adds support for the new PERF_RECORD_MMAP2 record type
exposed by the kernel. This is an extended PERF_RECORD_MMAP record.
It adds for each file-backed mapping the device major, minor number and
the inode number and generation.
This triplet uniquely identifies the source of a file-backed mapping. It
can be used to detect identical virtual mappings between processes, for
instance.
The patch will prefer MMAP2 over MMAP.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eranian@google.com
[ Cope with 314add6
"Change machine__findnew_thread() to set thread pid",
fix 'perf test' regression test entry affected,
use perf_missing_features.mmap2 to fallback to not using .mmap2 in older kernels,
so that new tools can work with kernels where this feature is not present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3042 lines
66 KiB
C
3042 lines
66 KiB
C
#include "util.h"
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#include <sys/types.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <sys/utsname.h>
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#include "evlist.h"
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#include "evsel.h"
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#include "header.h"
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#include "../perf.h"
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#include "trace-event.h"
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#include "session.h"
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#include "symbol.h"
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#include "debug.h"
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#include "cpumap.h"
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#include "pmu.h"
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#include "vdso.h"
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#include "strbuf.h"
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#include "build-id.h"
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static bool no_buildid_cache = false;
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static u32 header_argc;
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static const char **header_argv;
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/*
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* magic2 = "PERFILE2"
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* must be a numerical value to let the endianness
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* determine the memory layout. That way we are able
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* to detect endianness when reading the perf.data file
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* back.
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*
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* we check for legacy (PERFFILE) format.
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*/
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static const char *__perf_magic1 = "PERFFILE";
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static const u64 __perf_magic2 = 0x32454c4946524550ULL;
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static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
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#define PERF_MAGIC __perf_magic2
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struct perf_file_attr {
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struct perf_event_attr attr;
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struct perf_file_section ids;
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};
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void perf_header__set_feat(struct perf_header *header, int feat)
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{
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set_bit(feat, header->adds_features);
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}
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void perf_header__clear_feat(struct perf_header *header, int feat)
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{
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clear_bit(feat, header->adds_features);
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}
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bool perf_header__has_feat(const struct perf_header *header, int feat)
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{
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return test_bit(feat, header->adds_features);
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}
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static int do_write(int fd, const void *buf, size_t size)
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{
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while (size) {
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int ret = write(fd, buf, size);
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if (ret < 0)
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return -errno;
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size -= ret;
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buf += ret;
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}
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return 0;
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}
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#define NAME_ALIGN 64
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static int write_padded(int fd, const void *bf, size_t count,
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size_t count_aligned)
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{
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static const char zero_buf[NAME_ALIGN];
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int err = do_write(fd, bf, count);
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if (!err)
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err = do_write(fd, zero_buf, count_aligned - count);
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return err;
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}
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static int do_write_string(int fd, const char *str)
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{
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u32 len, olen;
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int ret;
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olen = strlen(str) + 1;
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len = PERF_ALIGN(olen, NAME_ALIGN);
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/* write len, incl. \0 */
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ret = do_write(fd, &len, sizeof(len));
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if (ret < 0)
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return ret;
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return write_padded(fd, str, olen, len);
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}
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static char *do_read_string(int fd, struct perf_header *ph)
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{
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ssize_t sz, ret;
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u32 len;
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char *buf;
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sz = readn(fd, &len, sizeof(len));
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if (sz < (ssize_t)sizeof(len))
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return NULL;
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if (ph->needs_swap)
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len = bswap_32(len);
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buf = malloc(len);
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if (!buf)
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return NULL;
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ret = readn(fd, buf, len);
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if (ret == (ssize_t)len) {
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/*
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* strings are padded by zeroes
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* thus the actual strlen of buf
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* may be less than len
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*/
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return buf;
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}
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free(buf);
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return NULL;
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}
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int
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perf_header__set_cmdline(int argc, const char **argv)
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{
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int i;
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/*
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* If header_argv has already been set, do not override it.
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* This allows a command to set the cmdline, parse args and
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* then call another builtin function that implements a
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* command -- e.g, cmd_kvm calling cmd_record.
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*/
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if (header_argv)
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return 0;
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header_argc = (u32)argc;
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/* do not include NULL termination */
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header_argv = calloc(argc, sizeof(char *));
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if (!header_argv)
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return -ENOMEM;
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/*
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* must copy argv contents because it gets moved
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* around during option parsing
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*/
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for (i = 0; i < argc ; i++)
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header_argv[i] = argv[i];
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return 0;
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}
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#define dsos__for_each_with_build_id(pos, head) \
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list_for_each_entry(pos, head, node) \
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if (!pos->has_build_id) \
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continue; \
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else
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static int write_buildid(char *name, size_t name_len, u8 *build_id,
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pid_t pid, u16 misc, int fd)
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{
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int err;
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struct build_id_event b;
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size_t len;
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len = name_len + 1;
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len = PERF_ALIGN(len, NAME_ALIGN);
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memset(&b, 0, sizeof(b));
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memcpy(&b.build_id, build_id, BUILD_ID_SIZE);
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b.pid = pid;
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b.header.misc = misc;
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b.header.size = sizeof(b) + len;
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err = do_write(fd, &b, sizeof(b));
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if (err < 0)
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return err;
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return write_padded(fd, name, name_len + 1, len);
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}
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static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
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u16 misc, int fd)
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{
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struct dso *pos;
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dsos__for_each_with_build_id(pos, head) {
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int err;
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char *name;
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size_t name_len;
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if (!pos->hit)
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continue;
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if (is_vdso_map(pos->short_name)) {
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name = (char *) VDSO__MAP_NAME;
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name_len = sizeof(VDSO__MAP_NAME) + 1;
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} else {
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name = pos->long_name;
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name_len = pos->long_name_len + 1;
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}
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err = write_buildid(name, name_len, pos->build_id,
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pid, misc, fd);
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if (err)
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return err;
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}
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return 0;
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}
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static int machine__write_buildid_table(struct machine *machine, int fd)
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{
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int err;
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u16 kmisc = PERF_RECORD_MISC_KERNEL,
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umisc = PERF_RECORD_MISC_USER;
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if (!machine__is_host(machine)) {
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kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
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umisc = PERF_RECORD_MISC_GUEST_USER;
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}
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err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
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kmisc, fd);
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if (err == 0)
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err = __dsos__write_buildid_table(&machine->user_dsos,
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machine->pid, umisc, fd);
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return err;
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}
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static int dsos__write_buildid_table(struct perf_header *header, int fd)
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{
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struct perf_session *session = container_of(header,
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struct perf_session, header);
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struct rb_node *nd;
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int err = machine__write_buildid_table(&session->machines.host, fd);
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if (err)
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return err;
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for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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err = machine__write_buildid_table(pos, fd);
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if (err)
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break;
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}
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return err;
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}
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int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
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const char *name, bool is_kallsyms, bool is_vdso)
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{
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const size_t size = PATH_MAX;
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char *realname, *filename = zalloc(size),
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*linkname = zalloc(size), *targetname;
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int len, err = -1;
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bool slash = is_kallsyms || is_vdso;
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if (is_kallsyms) {
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if (symbol_conf.kptr_restrict) {
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pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
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err = 0;
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goto out_free;
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}
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realname = (char *) name;
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} else
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realname = realpath(name, NULL);
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if (realname == NULL || filename == NULL || linkname == NULL)
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goto out_free;
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len = scnprintf(filename, size, "%s%s%s",
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debugdir, slash ? "/" : "",
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is_vdso ? VDSO__MAP_NAME : realname);
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if (mkdir_p(filename, 0755))
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goto out_free;
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snprintf(filename + len, size - len, "/%s", sbuild_id);
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if (access(filename, F_OK)) {
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if (is_kallsyms) {
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if (copyfile("/proc/kallsyms", filename))
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goto out_free;
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} else if (link(realname, filename) && copyfile(name, filename))
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goto out_free;
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}
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len = scnprintf(linkname, size, "%s/.build-id/%.2s",
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debugdir, sbuild_id);
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if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
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goto out_free;
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snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
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targetname = filename + strlen(debugdir) - 5;
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memcpy(targetname, "../..", 5);
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if (symlink(targetname, linkname) == 0)
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err = 0;
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out_free:
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if (!is_kallsyms)
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free(realname);
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free(filename);
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free(linkname);
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return err;
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}
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static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
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const char *name, const char *debugdir,
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bool is_kallsyms, bool is_vdso)
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{
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char sbuild_id[BUILD_ID_SIZE * 2 + 1];
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build_id__sprintf(build_id, build_id_size, sbuild_id);
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return build_id_cache__add_s(sbuild_id, debugdir, name,
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is_kallsyms, is_vdso);
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}
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int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
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{
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const size_t size = PATH_MAX;
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char *filename = zalloc(size),
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*linkname = zalloc(size);
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int err = -1;
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if (filename == NULL || linkname == NULL)
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goto out_free;
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snprintf(linkname, size, "%s/.build-id/%.2s/%s",
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debugdir, sbuild_id, sbuild_id + 2);
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if (access(linkname, F_OK))
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goto out_free;
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if (readlink(linkname, filename, size - 1) < 0)
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goto out_free;
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if (unlink(linkname))
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goto out_free;
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/*
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* Since the link is relative, we must make it absolute:
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*/
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snprintf(linkname, size, "%s/.build-id/%.2s/%s",
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debugdir, sbuild_id, filename);
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if (unlink(linkname))
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goto out_free;
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err = 0;
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out_free:
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free(filename);
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free(linkname);
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return err;
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}
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static int dso__cache_build_id(struct dso *dso, const char *debugdir)
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{
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bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
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bool is_vdso = is_vdso_map(dso->short_name);
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return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
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dso->long_name, debugdir,
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is_kallsyms, is_vdso);
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}
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static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
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{
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struct dso *pos;
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int err = 0;
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dsos__for_each_with_build_id(pos, head)
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if (dso__cache_build_id(pos, debugdir))
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err = -1;
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return err;
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}
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static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
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{
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int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
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ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
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return ret;
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}
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static int perf_session__cache_build_ids(struct perf_session *session)
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{
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struct rb_node *nd;
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int ret;
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
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if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
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return -1;
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ret = machine__cache_build_ids(&session->machines.host, debugdir);
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for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= machine__cache_build_ids(pos, debugdir);
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}
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return ret ? -1 : 0;
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}
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static bool machine__read_build_ids(struct machine *machine, bool with_hits)
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{
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bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits);
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ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits);
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return ret;
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}
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static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
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{
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struct rb_node *nd;
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bool ret = machine__read_build_ids(&session->machines.host, with_hits);
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for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= machine__read_build_ids(pos, with_hits);
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}
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return ret;
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}
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static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
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struct perf_evlist *evlist)
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{
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return read_tracing_data(fd, &evlist->entries);
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}
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|
|
|
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static int write_build_id(int fd, struct perf_header *h,
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struct perf_evlist *evlist __maybe_unused)
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{
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struct perf_session *session;
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int err;
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session = container_of(h, struct perf_session, header);
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if (!perf_session__read_build_ids(session, true))
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return -1;
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err = dsos__write_buildid_table(h, fd);
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if (err < 0) {
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pr_debug("failed to write buildid table\n");
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return err;
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}
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if (!no_buildid_cache)
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perf_session__cache_build_ids(session);
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return 0;
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}
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|
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static int write_hostname(int fd, struct perf_header *h __maybe_unused,
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struct perf_evlist *evlist __maybe_unused)
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{
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struct utsname uts;
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int ret;
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ret = uname(&uts);
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if (ret < 0)
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return -1;
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return do_write_string(fd, uts.nodename);
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}
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|
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static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
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struct perf_evlist *evlist __maybe_unused)
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{
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struct utsname uts;
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int ret;
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ret = uname(&uts);
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if (ret < 0)
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return -1;
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|
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return do_write_string(fd, uts.release);
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}
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|
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static int write_arch(int fd, struct perf_header *h __maybe_unused,
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struct perf_evlist *evlist __maybe_unused)
|
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{
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struct utsname uts;
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int ret;
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ret = uname(&uts);
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if (ret < 0)
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return -1;
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return do_write_string(fd, uts.machine);
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}
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|
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static int write_version(int fd, struct perf_header *h __maybe_unused,
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struct perf_evlist *evlist __maybe_unused)
|
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{
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return do_write_string(fd, perf_version_string);
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}
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|
|
static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
#ifndef CPUINFO_PROC
|
|
#define CPUINFO_PROC NULL
|
|
#endif
|
|
FILE *file;
|
|
char *buf = NULL;
|
|
char *s, *p;
|
|
const char *search = CPUINFO_PROC;
|
|
size_t len = 0;
|
|
int ret = -1;
|
|
|
|
if (!search)
|
|
return -1;
|
|
|
|
file = fopen("/proc/cpuinfo", "r");
|
|
if (!file)
|
|
return -1;
|
|
|
|
while (getline(&buf, &len, file) > 0) {
|
|
ret = strncmp(buf, search, strlen(search));
|
|
if (!ret)
|
|
break;
|
|
}
|
|
|
|
if (ret)
|
|
goto done;
|
|
|
|
s = buf;
|
|
|
|
p = strchr(buf, ':');
|
|
if (p && *(p+1) == ' ' && *(p+2))
|
|
s = p + 2;
|
|
p = strchr(s, '\n');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
/* squash extra space characters (branding string) */
|
|
p = s;
|
|
while (*p) {
|
|
if (isspace(*p)) {
|
|
char *r = p + 1;
|
|
char *q = r;
|
|
*p = ' ';
|
|
while (*q && isspace(*q))
|
|
q++;
|
|
if (q != (p+1))
|
|
while ((*r++ = *q++));
|
|
}
|
|
p++;
|
|
}
|
|
ret = do_write_string(fd, s);
|
|
done:
|
|
free(buf);
|
|
fclose(file);
|
|
return ret;
|
|
}
|
|
|
|
static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
long nr;
|
|
u32 nrc, nra;
|
|
int ret;
|
|
|
|
nr = sysconf(_SC_NPROCESSORS_CONF);
|
|
if (nr < 0)
|
|
return -1;
|
|
|
|
nrc = (u32)(nr & UINT_MAX);
|
|
|
|
nr = sysconf(_SC_NPROCESSORS_ONLN);
|
|
if (nr < 0)
|
|
return -1;
|
|
|
|
nra = (u32)(nr & UINT_MAX);
|
|
|
|
ret = do_write(fd, &nrc, sizeof(nrc));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return do_write(fd, &nra, sizeof(nra));
|
|
}
|
|
|
|
static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
u32 nre, nri, sz;
|
|
int ret;
|
|
|
|
nre = evlist->nr_entries;
|
|
|
|
/*
|
|
* write number of events
|
|
*/
|
|
ret = do_write(fd, &nre, sizeof(nre));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* size of perf_event_attr struct
|
|
*/
|
|
sz = (u32)sizeof(evsel->attr);
|
|
ret = do_write(fd, &sz, sizeof(sz));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
list_for_each_entry(evsel, &evlist->entries, node) {
|
|
|
|
ret = do_write(fd, &evsel->attr, sz);
|
|
if (ret < 0)
|
|
return ret;
|
|
/*
|
|
* write number of unique id per event
|
|
* there is one id per instance of an event
|
|
*
|
|
* copy into an nri to be independent of the
|
|
* type of ids,
|
|
*/
|
|
nri = evsel->ids;
|
|
ret = do_write(fd, &nri, sizeof(nri));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* write event string as passed on cmdline
|
|
*/
|
|
ret = do_write_string(fd, perf_evsel__name(evsel));
|
|
if (ret < 0)
|
|
return ret;
|
|
/*
|
|
* write unique ids for this event
|
|
*/
|
|
ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
char buf[MAXPATHLEN];
|
|
char proc[32];
|
|
u32 i, n;
|
|
int ret;
|
|
|
|
/*
|
|
* actual atual path to perf binary
|
|
*/
|
|
sprintf(proc, "/proc/%d/exe", getpid());
|
|
ret = readlink(proc, buf, sizeof(buf));
|
|
if (ret <= 0)
|
|
return -1;
|
|
|
|
/* readlink() does not add null termination */
|
|
buf[ret] = '\0';
|
|
|
|
/* account for binary path */
|
|
n = header_argc + 1;
|
|
|
|
ret = do_write(fd, &n, sizeof(n));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = do_write_string(fd, buf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0 ; i < header_argc; i++) {
|
|
ret = do_write_string(fd, header_argv[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define CORE_SIB_FMT \
|
|
"/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
|
|
#define THRD_SIB_FMT \
|
|
"/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
|
|
|
|
struct cpu_topo {
|
|
u32 core_sib;
|
|
u32 thread_sib;
|
|
char **core_siblings;
|
|
char **thread_siblings;
|
|
};
|
|
|
|
static int build_cpu_topo(struct cpu_topo *tp, int cpu)
|
|
{
|
|
FILE *fp;
|
|
char filename[MAXPATHLEN];
|
|
char *buf = NULL, *p;
|
|
size_t len = 0;
|
|
ssize_t sret;
|
|
u32 i = 0;
|
|
int ret = -1;
|
|
|
|
sprintf(filename, CORE_SIB_FMT, cpu);
|
|
fp = fopen(filename, "r");
|
|
if (!fp)
|
|
goto try_threads;
|
|
|
|
sret = getline(&buf, &len, fp);
|
|
fclose(fp);
|
|
if (sret <= 0)
|
|
goto try_threads;
|
|
|
|
p = strchr(buf, '\n');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
for (i = 0; i < tp->core_sib; i++) {
|
|
if (!strcmp(buf, tp->core_siblings[i]))
|
|
break;
|
|
}
|
|
if (i == tp->core_sib) {
|
|
tp->core_siblings[i] = buf;
|
|
tp->core_sib++;
|
|
buf = NULL;
|
|
len = 0;
|
|
}
|
|
ret = 0;
|
|
|
|
try_threads:
|
|
sprintf(filename, THRD_SIB_FMT, cpu);
|
|
fp = fopen(filename, "r");
|
|
if (!fp)
|
|
goto done;
|
|
|
|
if (getline(&buf, &len, fp) <= 0)
|
|
goto done;
|
|
|
|
p = strchr(buf, '\n');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
for (i = 0; i < tp->thread_sib; i++) {
|
|
if (!strcmp(buf, tp->thread_siblings[i]))
|
|
break;
|
|
}
|
|
if (i == tp->thread_sib) {
|
|
tp->thread_siblings[i] = buf;
|
|
tp->thread_sib++;
|
|
buf = NULL;
|
|
}
|
|
ret = 0;
|
|
done:
|
|
if(fp)
|
|
fclose(fp);
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
static void free_cpu_topo(struct cpu_topo *tp)
|
|
{
|
|
u32 i;
|
|
|
|
if (!tp)
|
|
return;
|
|
|
|
for (i = 0 ; i < tp->core_sib; i++)
|
|
free(tp->core_siblings[i]);
|
|
|
|
for (i = 0 ; i < tp->thread_sib; i++)
|
|
free(tp->thread_siblings[i]);
|
|
|
|
free(tp);
|
|
}
|
|
|
|
static struct cpu_topo *build_cpu_topology(void)
|
|
{
|
|
struct cpu_topo *tp;
|
|
void *addr;
|
|
u32 nr, i;
|
|
size_t sz;
|
|
long ncpus;
|
|
int ret = -1;
|
|
|
|
ncpus = sysconf(_SC_NPROCESSORS_CONF);
|
|
if (ncpus < 0)
|
|
return NULL;
|
|
|
|
nr = (u32)(ncpus & UINT_MAX);
|
|
|
|
sz = nr * sizeof(char *);
|
|
|
|
addr = calloc(1, sizeof(*tp) + 2 * sz);
|
|
if (!addr)
|
|
return NULL;
|
|
|
|
tp = addr;
|
|
|
|
addr += sizeof(*tp);
|
|
tp->core_siblings = addr;
|
|
addr += sz;
|
|
tp->thread_siblings = addr;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
ret = build_cpu_topo(tp, i);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
if (ret) {
|
|
free_cpu_topo(tp);
|
|
tp = NULL;
|
|
}
|
|
return tp;
|
|
}
|
|
|
|
static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
struct cpu_topo *tp;
|
|
u32 i;
|
|
int ret;
|
|
|
|
tp = build_cpu_topology();
|
|
if (!tp)
|
|
return -1;
|
|
|
|
ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
|
|
if (ret < 0)
|
|
goto done;
|
|
|
|
for (i = 0; i < tp->core_sib; i++) {
|
|
ret = do_write_string(fd, tp->core_siblings[i]);
|
|
if (ret < 0)
|
|
goto done;
|
|
}
|
|
ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
|
|
if (ret < 0)
|
|
goto done;
|
|
|
|
for (i = 0; i < tp->thread_sib; i++) {
|
|
ret = do_write_string(fd, tp->thread_siblings[i]);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
done:
|
|
free_cpu_topo(tp);
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
char *buf = NULL;
|
|
FILE *fp;
|
|
size_t len = 0;
|
|
int ret = -1, n;
|
|
uint64_t mem;
|
|
|
|
fp = fopen("/proc/meminfo", "r");
|
|
if (!fp)
|
|
return -1;
|
|
|
|
while (getline(&buf, &len, fp) > 0) {
|
|
ret = strncmp(buf, "MemTotal:", 9);
|
|
if (!ret)
|
|
break;
|
|
}
|
|
if (!ret) {
|
|
n = sscanf(buf, "%*s %"PRIu64, &mem);
|
|
if (n == 1)
|
|
ret = do_write(fd, &mem, sizeof(mem));
|
|
}
|
|
free(buf);
|
|
fclose(fp);
|
|
return ret;
|
|
}
|
|
|
|
static int write_topo_node(int fd, int node)
|
|
{
|
|
char str[MAXPATHLEN];
|
|
char field[32];
|
|
char *buf = NULL, *p;
|
|
size_t len = 0;
|
|
FILE *fp;
|
|
u64 mem_total, mem_free, mem;
|
|
int ret = -1;
|
|
|
|
sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
|
|
fp = fopen(str, "r");
|
|
if (!fp)
|
|
return -1;
|
|
|
|
while (getline(&buf, &len, fp) > 0) {
|
|
/* skip over invalid lines */
|
|
if (!strchr(buf, ':'))
|
|
continue;
|
|
if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2)
|
|
goto done;
|
|
if (!strcmp(field, "MemTotal:"))
|
|
mem_total = mem;
|
|
if (!strcmp(field, "MemFree:"))
|
|
mem_free = mem;
|
|
}
|
|
|
|
fclose(fp);
|
|
fp = NULL;
|
|
|
|
ret = do_write(fd, &mem_total, sizeof(u64));
|
|
if (ret)
|
|
goto done;
|
|
|
|
ret = do_write(fd, &mem_free, sizeof(u64));
|
|
if (ret)
|
|
goto done;
|
|
|
|
ret = -1;
|
|
sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
|
|
|
|
fp = fopen(str, "r");
|
|
if (!fp)
|
|
goto done;
|
|
|
|
if (getline(&buf, &len, fp) <= 0)
|
|
goto done;
|
|
|
|
p = strchr(buf, '\n');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
ret = do_write_string(fd, buf);
|
|
done:
|
|
free(buf);
|
|
if (fp)
|
|
fclose(fp);
|
|
return ret;
|
|
}
|
|
|
|
static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
char *buf = NULL;
|
|
size_t len = 0;
|
|
FILE *fp;
|
|
struct cpu_map *node_map = NULL;
|
|
char *c;
|
|
u32 nr, i, j;
|
|
int ret = -1;
|
|
|
|
fp = fopen("/sys/devices/system/node/online", "r");
|
|
if (!fp)
|
|
return -1;
|
|
|
|
if (getline(&buf, &len, fp) <= 0)
|
|
goto done;
|
|
|
|
c = strchr(buf, '\n');
|
|
if (c)
|
|
*c = '\0';
|
|
|
|
node_map = cpu_map__new(buf);
|
|
if (!node_map)
|
|
goto done;
|
|
|
|
nr = (u32)node_map->nr;
|
|
|
|
ret = do_write(fd, &nr, sizeof(nr));
|
|
if (ret < 0)
|
|
goto done;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
j = (u32)node_map->map[i];
|
|
ret = do_write(fd, &j, sizeof(j));
|
|
if (ret < 0)
|
|
break;
|
|
|
|
ret = write_topo_node(fd, i);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
done:
|
|
free(buf);
|
|
fclose(fp);
|
|
free(node_map);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* File format:
|
|
*
|
|
* struct pmu_mappings {
|
|
* u32 pmu_num;
|
|
* struct pmu_map {
|
|
* u32 type;
|
|
* char name[];
|
|
* }[pmu_num];
|
|
* };
|
|
*/
|
|
|
|
static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
struct perf_pmu *pmu = NULL;
|
|
off_t offset = lseek(fd, 0, SEEK_CUR);
|
|
__u32 pmu_num = 0;
|
|
int ret;
|
|
|
|
/* write real pmu_num later */
|
|
ret = do_write(fd, &pmu_num, sizeof(pmu_num));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
while ((pmu = perf_pmu__scan(pmu))) {
|
|
if (!pmu->name)
|
|
continue;
|
|
pmu_num++;
|
|
|
|
ret = do_write(fd, &pmu->type, sizeof(pmu->type));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = do_write_string(fd, pmu->name);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
|
|
/* discard all */
|
|
lseek(fd, offset, SEEK_SET);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* File format:
|
|
*
|
|
* struct group_descs {
|
|
* u32 nr_groups;
|
|
* struct group_desc {
|
|
* char name[];
|
|
* u32 leader_idx;
|
|
* u32 nr_members;
|
|
* }[nr_groups];
|
|
* };
|
|
*/
|
|
static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist)
|
|
{
|
|
u32 nr_groups = evlist->nr_groups;
|
|
struct perf_evsel *evsel;
|
|
int ret;
|
|
|
|
ret = do_write(fd, &nr_groups, sizeof(nr_groups));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
list_for_each_entry(evsel, &evlist->entries, node) {
|
|
if (perf_evsel__is_group_leader(evsel) &&
|
|
evsel->nr_members > 1) {
|
|
const char *name = evsel->group_name ?: "{anon_group}";
|
|
u32 leader_idx = evsel->idx;
|
|
u32 nr_members = evsel->nr_members;
|
|
|
|
ret = do_write_string(fd, name);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = do_write(fd, &leader_idx, sizeof(leader_idx));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = do_write(fd, &nr_members, sizeof(nr_members));
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* default get_cpuid(): nothing gets recorded
|
|
* actual implementation must be in arch/$(ARCH)/util/header.c
|
|
*/
|
|
int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
|
|
size_t sz __maybe_unused)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
char buffer[64];
|
|
int ret;
|
|
|
|
ret = get_cpuid(buffer, sizeof(buffer));
|
|
if (!ret)
|
|
goto write_it;
|
|
|
|
return -1;
|
|
write_it:
|
|
return do_write_string(fd, buffer);
|
|
}
|
|
|
|
static int write_branch_stack(int fd __maybe_unused,
|
|
struct perf_header *h __maybe_unused,
|
|
struct perf_evlist *evlist __maybe_unused)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# hostname : %s\n", ph->env.hostname);
|
|
}
|
|
|
|
static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# os release : %s\n", ph->env.os_release);
|
|
}
|
|
|
|
static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
|
|
{
|
|
fprintf(fp, "# arch : %s\n", ph->env.arch);
|
|
}
|
|
|
|
static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
|
|
}
|
|
|
|
static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
|
|
fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
|
|
}
|
|
|
|
static void print_version(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# perf version : %s\n", ph->env.version);
|
|
}
|
|
|
|
static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
int nr, i;
|
|
char *str;
|
|
|
|
nr = ph->env.nr_cmdline;
|
|
str = ph->env.cmdline;
|
|
|
|
fprintf(fp, "# cmdline : ");
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
fprintf(fp, "%s ", str);
|
|
str += strlen(str) + 1;
|
|
}
|
|
fputc('\n', fp);
|
|
}
|
|
|
|
static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
int nr, i;
|
|
char *str;
|
|
|
|
nr = ph->env.nr_sibling_cores;
|
|
str = ph->env.sibling_cores;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
fprintf(fp, "# sibling cores : %s\n", str);
|
|
str += strlen(str) + 1;
|
|
}
|
|
|
|
nr = ph->env.nr_sibling_threads;
|
|
str = ph->env.sibling_threads;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
fprintf(fp, "# sibling threads : %s\n", str);
|
|
str += strlen(str) + 1;
|
|
}
|
|
}
|
|
|
|
static void free_event_desc(struct perf_evsel *events)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
if (!events)
|
|
return;
|
|
|
|
for (evsel = events; evsel->attr.size; evsel++) {
|
|
if (evsel->name)
|
|
free(evsel->name);
|
|
if (evsel->id)
|
|
free(evsel->id);
|
|
}
|
|
|
|
free(events);
|
|
}
|
|
|
|
static struct perf_evsel *
|
|
read_event_desc(struct perf_header *ph, int fd)
|
|
{
|
|
struct perf_evsel *evsel, *events = NULL;
|
|
u64 *id;
|
|
void *buf = NULL;
|
|
u32 nre, sz, nr, i, j;
|
|
ssize_t ret;
|
|
size_t msz;
|
|
|
|
/* number of events */
|
|
ret = readn(fd, &nre, sizeof(nre));
|
|
if (ret != (ssize_t)sizeof(nre))
|
|
goto error;
|
|
|
|
if (ph->needs_swap)
|
|
nre = bswap_32(nre);
|
|
|
|
ret = readn(fd, &sz, sizeof(sz));
|
|
if (ret != (ssize_t)sizeof(sz))
|
|
goto error;
|
|
|
|
if (ph->needs_swap)
|
|
sz = bswap_32(sz);
|
|
|
|
/* buffer to hold on file attr struct */
|
|
buf = malloc(sz);
|
|
if (!buf)
|
|
goto error;
|
|
|
|
/* the last event terminates with evsel->attr.size == 0: */
|
|
events = calloc(nre + 1, sizeof(*events));
|
|
if (!events)
|
|
goto error;
|
|
|
|
msz = sizeof(evsel->attr);
|
|
if (sz < msz)
|
|
msz = sz;
|
|
|
|
for (i = 0, evsel = events; i < nre; evsel++, i++) {
|
|
evsel->idx = i;
|
|
|
|
/*
|
|
* must read entire on-file attr struct to
|
|
* sync up with layout.
|
|
*/
|
|
ret = readn(fd, buf, sz);
|
|
if (ret != (ssize_t)sz)
|
|
goto error;
|
|
|
|
if (ph->needs_swap)
|
|
perf_event__attr_swap(buf);
|
|
|
|
memcpy(&evsel->attr, buf, msz);
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != (ssize_t)sizeof(nr))
|
|
goto error;
|
|
|
|
if (ph->needs_swap) {
|
|
nr = bswap_32(nr);
|
|
evsel->needs_swap = true;
|
|
}
|
|
|
|
evsel->name = do_read_string(fd, ph);
|
|
|
|
if (!nr)
|
|
continue;
|
|
|
|
id = calloc(nr, sizeof(*id));
|
|
if (!id)
|
|
goto error;
|
|
evsel->ids = nr;
|
|
evsel->id = id;
|
|
|
|
for (j = 0 ; j < nr; j++) {
|
|
ret = readn(fd, id, sizeof(*id));
|
|
if (ret != (ssize_t)sizeof(*id))
|
|
goto error;
|
|
if (ph->needs_swap)
|
|
*id = bswap_64(*id);
|
|
id++;
|
|
}
|
|
}
|
|
out:
|
|
if (buf)
|
|
free(buf);
|
|
return events;
|
|
error:
|
|
if (events)
|
|
free_event_desc(events);
|
|
events = NULL;
|
|
goto out;
|
|
}
|
|
|
|
static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
|
|
{
|
|
struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
|
|
u32 j;
|
|
u64 *id;
|
|
|
|
if (!events) {
|
|
fprintf(fp, "# event desc: not available or unable to read\n");
|
|
return;
|
|
}
|
|
|
|
for (evsel = events; evsel->attr.size; evsel++) {
|
|
fprintf(fp, "# event : name = %s, ", evsel->name);
|
|
|
|
fprintf(fp, "type = %d, config = 0x%"PRIx64
|
|
", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
|
|
evsel->attr.type,
|
|
(u64)evsel->attr.config,
|
|
(u64)evsel->attr.config1,
|
|
(u64)evsel->attr.config2);
|
|
|
|
fprintf(fp, ", excl_usr = %d, excl_kern = %d",
|
|
evsel->attr.exclude_user,
|
|
evsel->attr.exclude_kernel);
|
|
|
|
fprintf(fp, ", excl_host = %d, excl_guest = %d",
|
|
evsel->attr.exclude_host,
|
|
evsel->attr.exclude_guest);
|
|
|
|
fprintf(fp, ", precise_ip = %d", evsel->attr.precise_ip);
|
|
|
|
fprintf(fp, ", attr_mmap2 = %d", evsel->attr.mmap2);
|
|
fprintf(fp, ", attr_mmap = %d", evsel->attr.mmap);
|
|
fprintf(fp, ", attr_mmap_data = %d", evsel->attr.mmap_data);
|
|
if (evsel->ids) {
|
|
fprintf(fp, ", id = {");
|
|
for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
|
|
if (j)
|
|
fputc(',', fp);
|
|
fprintf(fp, " %"PRIu64, *id);
|
|
}
|
|
fprintf(fp, " }");
|
|
}
|
|
|
|
fputc('\n', fp);
|
|
}
|
|
|
|
free_event_desc(events);
|
|
}
|
|
|
|
static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
|
|
}
|
|
|
|
static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
u32 nr, c, i;
|
|
char *str, *tmp;
|
|
uint64_t mem_total, mem_free;
|
|
|
|
/* nr nodes */
|
|
nr = ph->env.nr_numa_nodes;
|
|
str = ph->env.numa_nodes;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
/* node number */
|
|
c = strtoul(str, &tmp, 0);
|
|
if (*tmp != ':')
|
|
goto error;
|
|
|
|
str = tmp + 1;
|
|
mem_total = strtoull(str, &tmp, 0);
|
|
if (*tmp != ':')
|
|
goto error;
|
|
|
|
str = tmp + 1;
|
|
mem_free = strtoull(str, &tmp, 0);
|
|
if (*tmp != ':')
|
|
goto error;
|
|
|
|
fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
|
|
" free = %"PRIu64" kB\n",
|
|
c, mem_total, mem_free);
|
|
|
|
str = tmp + 1;
|
|
fprintf(fp, "# node%u cpu list : %s\n", c, str);
|
|
|
|
str += strlen(str) + 1;
|
|
}
|
|
return;
|
|
error:
|
|
fprintf(fp, "# numa topology : not available\n");
|
|
}
|
|
|
|
static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
|
|
{
|
|
fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
|
|
}
|
|
|
|
static void print_branch_stack(struct perf_header *ph __maybe_unused,
|
|
int fd __maybe_unused, FILE *fp)
|
|
{
|
|
fprintf(fp, "# contains samples with branch stack\n");
|
|
}
|
|
|
|
static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
const char *delimiter = "# pmu mappings: ";
|
|
char *str, *tmp;
|
|
u32 pmu_num;
|
|
u32 type;
|
|
|
|
pmu_num = ph->env.nr_pmu_mappings;
|
|
if (!pmu_num) {
|
|
fprintf(fp, "# pmu mappings: not available\n");
|
|
return;
|
|
}
|
|
|
|
str = ph->env.pmu_mappings;
|
|
|
|
while (pmu_num) {
|
|
type = strtoul(str, &tmp, 0);
|
|
if (*tmp != ':')
|
|
goto error;
|
|
|
|
str = tmp + 1;
|
|
fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
|
|
|
|
delimiter = ", ";
|
|
str += strlen(str) + 1;
|
|
pmu_num--;
|
|
}
|
|
|
|
fprintf(fp, "\n");
|
|
|
|
if (!pmu_num)
|
|
return;
|
|
error:
|
|
fprintf(fp, "# pmu mappings: unable to read\n");
|
|
}
|
|
|
|
static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
|
|
FILE *fp)
|
|
{
|
|
struct perf_session *session;
|
|
struct perf_evsel *evsel;
|
|
u32 nr = 0;
|
|
|
|
session = container_of(ph, struct perf_session, header);
|
|
|
|
list_for_each_entry(evsel, &session->evlist->entries, node) {
|
|
if (perf_evsel__is_group_leader(evsel) &&
|
|
evsel->nr_members > 1) {
|
|
fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
|
|
perf_evsel__name(evsel));
|
|
|
|
nr = evsel->nr_members - 1;
|
|
} else if (nr) {
|
|
fprintf(fp, ",%s", perf_evsel__name(evsel));
|
|
|
|
if (--nr == 0)
|
|
fprintf(fp, "}\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static int __event_process_build_id(struct build_id_event *bev,
|
|
char *filename,
|
|
struct perf_session *session)
|
|
{
|
|
int err = -1;
|
|
struct list_head *head;
|
|
struct machine *machine;
|
|
u16 misc;
|
|
struct dso *dso;
|
|
enum dso_kernel_type dso_type;
|
|
|
|
machine = perf_session__findnew_machine(session, bev->pid);
|
|
if (!machine)
|
|
goto out;
|
|
|
|
misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
|
|
switch (misc) {
|
|
case PERF_RECORD_MISC_KERNEL:
|
|
dso_type = DSO_TYPE_KERNEL;
|
|
head = &machine->kernel_dsos;
|
|
break;
|
|
case PERF_RECORD_MISC_GUEST_KERNEL:
|
|
dso_type = DSO_TYPE_GUEST_KERNEL;
|
|
head = &machine->kernel_dsos;
|
|
break;
|
|
case PERF_RECORD_MISC_USER:
|
|
case PERF_RECORD_MISC_GUEST_USER:
|
|
dso_type = DSO_TYPE_USER;
|
|
head = &machine->user_dsos;
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
dso = __dsos__findnew(head, filename);
|
|
if (dso != NULL) {
|
|
char sbuild_id[BUILD_ID_SIZE * 2 + 1];
|
|
|
|
dso__set_build_id(dso, &bev->build_id);
|
|
|
|
if (filename[0] == '[')
|
|
dso->kernel = dso_type;
|
|
|
|
build_id__sprintf(dso->build_id, sizeof(dso->build_id),
|
|
sbuild_id);
|
|
pr_debug("build id event received for %s: %s\n",
|
|
dso->long_name, sbuild_id);
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
|
|
int input, u64 offset, u64 size)
|
|
{
|
|
struct perf_session *session = container_of(header, struct perf_session, header);
|
|
struct {
|
|
struct perf_event_header header;
|
|
u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
|
|
char filename[0];
|
|
} old_bev;
|
|
struct build_id_event bev;
|
|
char filename[PATH_MAX];
|
|
u64 limit = offset + size;
|
|
|
|
while (offset < limit) {
|
|
ssize_t len;
|
|
|
|
if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
|
|
return -1;
|
|
|
|
if (header->needs_swap)
|
|
perf_event_header__bswap(&old_bev.header);
|
|
|
|
len = old_bev.header.size - sizeof(old_bev);
|
|
if (readn(input, filename, len) != len)
|
|
return -1;
|
|
|
|
bev.header = old_bev.header;
|
|
|
|
/*
|
|
* As the pid is the missing value, we need to fill
|
|
* it properly. The header.misc value give us nice hint.
|
|
*/
|
|
bev.pid = HOST_KERNEL_ID;
|
|
if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
|
|
bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
|
|
bev.pid = DEFAULT_GUEST_KERNEL_ID;
|
|
|
|
memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
|
|
__event_process_build_id(&bev, filename, session);
|
|
|
|
offset += bev.header.size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_header__read_build_ids(struct perf_header *header,
|
|
int input, u64 offset, u64 size)
|
|
{
|
|
struct perf_session *session = container_of(header, struct perf_session, header);
|
|
struct build_id_event bev;
|
|
char filename[PATH_MAX];
|
|
u64 limit = offset + size, orig_offset = offset;
|
|
int err = -1;
|
|
|
|
while (offset < limit) {
|
|
ssize_t len;
|
|
|
|
if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
|
|
goto out;
|
|
|
|
if (header->needs_swap)
|
|
perf_event_header__bswap(&bev.header);
|
|
|
|
len = bev.header.size - sizeof(bev);
|
|
if (readn(input, filename, len) != len)
|
|
goto out;
|
|
/*
|
|
* The a1645ce1 changeset:
|
|
*
|
|
* "perf: 'perf kvm' tool for monitoring guest performance from host"
|
|
*
|
|
* Added a field to struct build_id_event that broke the file
|
|
* format.
|
|
*
|
|
* Since the kernel build-id is the first entry, process the
|
|
* table using the old format if the well known
|
|
* '[kernel.kallsyms]' string for the kernel build-id has the
|
|
* first 4 characters chopped off (where the pid_t sits).
|
|
*/
|
|
if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
|
|
if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
|
|
return -1;
|
|
return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
|
|
}
|
|
|
|
__event_process_build_id(&bev, filename, session);
|
|
|
|
offset += bev.header.size;
|
|
}
|
|
err = 0;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int process_tracing_data(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph __maybe_unused,
|
|
int fd, void *data)
|
|
{
|
|
ssize_t ret = trace_report(fd, data, false);
|
|
return ret < 0 ? -1 : 0;
|
|
}
|
|
|
|
static int process_build_id(struct perf_file_section *section,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
|
|
pr_debug("Failed to read buildids, continuing...\n");
|
|
return 0;
|
|
}
|
|
|
|
static int process_hostname(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.hostname = do_read_string(fd, ph);
|
|
return ph->env.hostname ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_osrelease(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.os_release = do_read_string(fd, ph);
|
|
return ph->env.os_release ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_version(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.version = do_read_string(fd, ph);
|
|
return ph->env.version ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_arch(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.arch = do_read_string(fd, ph);
|
|
return ph->env.arch ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_nrcpus(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret;
|
|
u32 nr;
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_cpus_online = nr;
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_cpus_avail = nr;
|
|
return 0;
|
|
}
|
|
|
|
static int process_cpudesc(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.cpu_desc = do_read_string(fd, ph);
|
|
return ph->env.cpu_desc ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_cpuid(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
ph->env.cpuid = do_read_string(fd, ph);
|
|
return ph->env.cpuid ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int process_total_mem(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
uint64_t mem;
|
|
size_t ret;
|
|
|
|
ret = readn(fd, &mem, sizeof(mem));
|
|
if (ret != sizeof(mem))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
mem = bswap_64(mem);
|
|
|
|
ph->env.total_mem = mem;
|
|
return 0;
|
|
}
|
|
|
|
static struct perf_evsel *
|
|
perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
list_for_each_entry(evsel, &evlist->entries, node) {
|
|
if (evsel->idx == idx)
|
|
return evsel;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
perf_evlist__set_event_name(struct perf_evlist *evlist,
|
|
struct perf_evsel *event)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
if (!event->name)
|
|
return;
|
|
|
|
evsel = perf_evlist__find_by_index(evlist, event->idx);
|
|
if (!evsel)
|
|
return;
|
|
|
|
if (evsel->name)
|
|
return;
|
|
|
|
evsel->name = strdup(event->name);
|
|
}
|
|
|
|
static int
|
|
process_event_desc(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *header, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
struct perf_session *session;
|
|
struct perf_evsel *evsel, *events = read_event_desc(header, fd);
|
|
|
|
if (!events)
|
|
return 0;
|
|
|
|
session = container_of(header, struct perf_session, header);
|
|
for (evsel = events; evsel->attr.size; evsel++)
|
|
perf_evlist__set_event_name(session->evlist, evsel);
|
|
|
|
free_event_desc(events);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_cmdline(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret;
|
|
char *str;
|
|
u32 nr, i;
|
|
struct strbuf sb;
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_cmdline = nr;
|
|
strbuf_init(&sb, 128);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
str = do_read_string(fd, ph);
|
|
if (!str)
|
|
goto error;
|
|
|
|
/* include a NULL character at the end */
|
|
strbuf_add(&sb, str, strlen(str) + 1);
|
|
free(str);
|
|
}
|
|
ph->env.cmdline = strbuf_detach(&sb, NULL);
|
|
return 0;
|
|
|
|
error:
|
|
strbuf_release(&sb);
|
|
return -1;
|
|
}
|
|
|
|
static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret;
|
|
u32 nr, i;
|
|
char *str;
|
|
struct strbuf sb;
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_sibling_cores = nr;
|
|
strbuf_init(&sb, 128);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
str = do_read_string(fd, ph);
|
|
if (!str)
|
|
goto error;
|
|
|
|
/* include a NULL character at the end */
|
|
strbuf_add(&sb, str, strlen(str) + 1);
|
|
free(str);
|
|
}
|
|
ph->env.sibling_cores = strbuf_detach(&sb, NULL);
|
|
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_sibling_threads = nr;
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
str = do_read_string(fd, ph);
|
|
if (!str)
|
|
goto error;
|
|
|
|
/* include a NULL character at the end */
|
|
strbuf_add(&sb, str, strlen(str) + 1);
|
|
free(str);
|
|
}
|
|
ph->env.sibling_threads = strbuf_detach(&sb, NULL);
|
|
return 0;
|
|
|
|
error:
|
|
strbuf_release(&sb);
|
|
return -1;
|
|
}
|
|
|
|
static int process_numa_topology(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret;
|
|
u32 nr, node, i;
|
|
char *str;
|
|
uint64_t mem_total, mem_free;
|
|
struct strbuf sb;
|
|
|
|
/* nr nodes */
|
|
ret = readn(fd, &nr, sizeof(nr));
|
|
if (ret != sizeof(nr))
|
|
goto error;
|
|
|
|
if (ph->needs_swap)
|
|
nr = bswap_32(nr);
|
|
|
|
ph->env.nr_numa_nodes = nr;
|
|
strbuf_init(&sb, 256);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
/* node number */
|
|
ret = readn(fd, &node, sizeof(node));
|
|
if (ret != sizeof(node))
|
|
goto error;
|
|
|
|
ret = readn(fd, &mem_total, sizeof(u64));
|
|
if (ret != sizeof(u64))
|
|
goto error;
|
|
|
|
ret = readn(fd, &mem_free, sizeof(u64));
|
|
if (ret != sizeof(u64))
|
|
goto error;
|
|
|
|
if (ph->needs_swap) {
|
|
node = bswap_32(node);
|
|
mem_total = bswap_64(mem_total);
|
|
mem_free = bswap_64(mem_free);
|
|
}
|
|
|
|
strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
|
|
node, mem_total, mem_free);
|
|
|
|
str = do_read_string(fd, ph);
|
|
if (!str)
|
|
goto error;
|
|
|
|
/* include a NULL character at the end */
|
|
strbuf_add(&sb, str, strlen(str) + 1);
|
|
free(str);
|
|
}
|
|
ph->env.numa_nodes = strbuf_detach(&sb, NULL);
|
|
return 0;
|
|
|
|
error:
|
|
strbuf_release(&sb);
|
|
return -1;
|
|
}
|
|
|
|
static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret;
|
|
char *name;
|
|
u32 pmu_num;
|
|
u32 type;
|
|
struct strbuf sb;
|
|
|
|
ret = readn(fd, &pmu_num, sizeof(pmu_num));
|
|
if (ret != sizeof(pmu_num))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
pmu_num = bswap_32(pmu_num);
|
|
|
|
if (!pmu_num) {
|
|
pr_debug("pmu mappings not available\n");
|
|
return 0;
|
|
}
|
|
|
|
ph->env.nr_pmu_mappings = pmu_num;
|
|
strbuf_init(&sb, 128);
|
|
|
|
while (pmu_num) {
|
|
if (readn(fd, &type, sizeof(type)) != sizeof(type))
|
|
goto error;
|
|
if (ph->needs_swap)
|
|
type = bswap_32(type);
|
|
|
|
name = do_read_string(fd, ph);
|
|
if (!name)
|
|
goto error;
|
|
|
|
strbuf_addf(&sb, "%u:%s", type, name);
|
|
/* include a NULL character at the end */
|
|
strbuf_add(&sb, "", 1);
|
|
|
|
free(name);
|
|
pmu_num--;
|
|
}
|
|
ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
|
|
return 0;
|
|
|
|
error:
|
|
strbuf_release(&sb);
|
|
return -1;
|
|
}
|
|
|
|
static int process_group_desc(struct perf_file_section *section __maybe_unused,
|
|
struct perf_header *ph, int fd,
|
|
void *data __maybe_unused)
|
|
{
|
|
size_t ret = -1;
|
|
u32 i, nr, nr_groups;
|
|
struct perf_session *session;
|
|
struct perf_evsel *evsel, *leader = NULL;
|
|
struct group_desc {
|
|
char *name;
|
|
u32 leader_idx;
|
|
u32 nr_members;
|
|
} *desc;
|
|
|
|
if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
|
|
return -1;
|
|
|
|
if (ph->needs_swap)
|
|
nr_groups = bswap_32(nr_groups);
|
|
|
|
ph->env.nr_groups = nr_groups;
|
|
if (!nr_groups) {
|
|
pr_debug("group desc not available\n");
|
|
return 0;
|
|
}
|
|
|
|
desc = calloc(nr_groups, sizeof(*desc));
|
|
if (!desc)
|
|
return -1;
|
|
|
|
for (i = 0; i < nr_groups; i++) {
|
|
desc[i].name = do_read_string(fd, ph);
|
|
if (!desc[i].name)
|
|
goto out_free;
|
|
|
|
if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
|
|
goto out_free;
|
|
|
|
if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
|
|
goto out_free;
|
|
|
|
if (ph->needs_swap) {
|
|
desc[i].leader_idx = bswap_32(desc[i].leader_idx);
|
|
desc[i].nr_members = bswap_32(desc[i].nr_members);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Rebuild group relationship based on the group_desc
|
|
*/
|
|
session = container_of(ph, struct perf_session, header);
|
|
session->evlist->nr_groups = nr_groups;
|
|
|
|
i = nr = 0;
|
|
list_for_each_entry(evsel, &session->evlist->entries, node) {
|
|
if (evsel->idx == (int) desc[i].leader_idx) {
|
|
evsel->leader = evsel;
|
|
/* {anon_group} is a dummy name */
|
|
if (strcmp(desc[i].name, "{anon_group}"))
|
|
evsel->group_name = desc[i].name;
|
|
evsel->nr_members = desc[i].nr_members;
|
|
|
|
if (i >= nr_groups || nr > 0) {
|
|
pr_debug("invalid group desc\n");
|
|
goto out_free;
|
|
}
|
|
|
|
leader = evsel;
|
|
nr = evsel->nr_members - 1;
|
|
i++;
|
|
} else if (nr) {
|
|
/* This is a group member */
|
|
evsel->leader = leader;
|
|
|
|
nr--;
|
|
}
|
|
}
|
|
|
|
if (i != nr_groups || nr != 0) {
|
|
pr_debug("invalid group desc\n");
|
|
goto out_free;
|
|
}
|
|
|
|
ret = 0;
|
|
out_free:
|
|
while ((int) --i >= 0)
|
|
free(desc[i].name);
|
|
free(desc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct feature_ops {
|
|
int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
|
|
void (*print)(struct perf_header *h, int fd, FILE *fp);
|
|
int (*process)(struct perf_file_section *section,
|
|
struct perf_header *h, int fd, void *data);
|
|
const char *name;
|
|
bool full_only;
|
|
};
|
|
|
|
#define FEAT_OPA(n, func) \
|
|
[n] = { .name = #n, .write = write_##func, .print = print_##func }
|
|
#define FEAT_OPP(n, func) \
|
|
[n] = { .name = #n, .write = write_##func, .print = print_##func, \
|
|
.process = process_##func }
|
|
#define FEAT_OPF(n, func) \
|
|
[n] = { .name = #n, .write = write_##func, .print = print_##func, \
|
|
.process = process_##func, .full_only = true }
|
|
|
|
/* feature_ops not implemented: */
|
|
#define print_tracing_data NULL
|
|
#define print_build_id NULL
|
|
|
|
static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
|
|
FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
|
|
FEAT_OPP(HEADER_BUILD_ID, build_id),
|
|
FEAT_OPP(HEADER_HOSTNAME, hostname),
|
|
FEAT_OPP(HEADER_OSRELEASE, osrelease),
|
|
FEAT_OPP(HEADER_VERSION, version),
|
|
FEAT_OPP(HEADER_ARCH, arch),
|
|
FEAT_OPP(HEADER_NRCPUS, nrcpus),
|
|
FEAT_OPP(HEADER_CPUDESC, cpudesc),
|
|
FEAT_OPP(HEADER_CPUID, cpuid),
|
|
FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
|
|
FEAT_OPP(HEADER_EVENT_DESC, event_desc),
|
|
FEAT_OPP(HEADER_CMDLINE, cmdline),
|
|
FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
|
|
FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
|
|
FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
|
|
FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
|
|
FEAT_OPP(HEADER_GROUP_DESC, group_desc),
|
|
};
|
|
|
|
struct header_print_data {
|
|
FILE *fp;
|
|
bool full; /* extended list of headers */
|
|
};
|
|
|
|
static int perf_file_section__fprintf_info(struct perf_file_section *section,
|
|
struct perf_header *ph,
|
|
int feat, int fd, void *data)
|
|
{
|
|
struct header_print_data *hd = data;
|
|
|
|
if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
|
|
pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
|
|
"%d, continuing...\n", section->offset, feat);
|
|
return 0;
|
|
}
|
|
if (feat >= HEADER_LAST_FEATURE) {
|
|
pr_warning("unknown feature %d\n", feat);
|
|
return 0;
|
|
}
|
|
if (!feat_ops[feat].print)
|
|
return 0;
|
|
|
|
if (!feat_ops[feat].full_only || hd->full)
|
|
feat_ops[feat].print(ph, fd, hd->fp);
|
|
else
|
|
fprintf(hd->fp, "# %s info available, use -I to display\n",
|
|
feat_ops[feat].name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
|
|
{
|
|
struct header_print_data hd;
|
|
struct perf_header *header = &session->header;
|
|
int fd = session->fd;
|
|
hd.fp = fp;
|
|
hd.full = full;
|
|
|
|
perf_header__process_sections(header, fd, &hd,
|
|
perf_file_section__fprintf_info);
|
|
return 0;
|
|
}
|
|
|
|
static int do_write_feat(int fd, struct perf_header *h, int type,
|
|
struct perf_file_section **p,
|
|
struct perf_evlist *evlist)
|
|
{
|
|
int err;
|
|
int ret = 0;
|
|
|
|
if (perf_header__has_feat(h, type)) {
|
|
if (!feat_ops[type].write)
|
|
return -1;
|
|
|
|
(*p)->offset = lseek(fd, 0, SEEK_CUR);
|
|
|
|
err = feat_ops[type].write(fd, h, evlist);
|
|
if (err < 0) {
|
|
pr_debug("failed to write feature %d\n", type);
|
|
|
|
/* undo anything written */
|
|
lseek(fd, (*p)->offset, SEEK_SET);
|
|
|
|
return -1;
|
|
}
|
|
(*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
|
|
(*p)++;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int perf_header__adds_write(struct perf_header *header,
|
|
struct perf_evlist *evlist, int fd)
|
|
{
|
|
int nr_sections;
|
|
struct perf_file_section *feat_sec, *p;
|
|
int sec_size;
|
|
u64 sec_start;
|
|
int feat;
|
|
int err;
|
|
|
|
nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
|
|
if (!nr_sections)
|
|
return 0;
|
|
|
|
feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
|
|
if (feat_sec == NULL)
|
|
return -ENOMEM;
|
|
|
|
sec_size = sizeof(*feat_sec) * nr_sections;
|
|
|
|
sec_start = header->feat_offset;
|
|
lseek(fd, sec_start + sec_size, SEEK_SET);
|
|
|
|
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
|
|
if (do_write_feat(fd, header, feat, &p, evlist))
|
|
perf_header__clear_feat(header, feat);
|
|
}
|
|
|
|
lseek(fd, sec_start, SEEK_SET);
|
|
/*
|
|
* may write more than needed due to dropped feature, but
|
|
* this is okay, reader will skip the mising entries
|
|
*/
|
|
err = do_write(fd, feat_sec, sec_size);
|
|
if (err < 0)
|
|
pr_debug("failed to write feature section\n");
|
|
free(feat_sec);
|
|
return err;
|
|
}
|
|
|
|
int perf_header__write_pipe(int fd)
|
|
{
|
|
struct perf_pipe_file_header f_header;
|
|
int err;
|
|
|
|
f_header = (struct perf_pipe_file_header){
|
|
.magic = PERF_MAGIC,
|
|
.size = sizeof(f_header),
|
|
};
|
|
|
|
err = do_write(fd, &f_header, sizeof(f_header));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf pipe header\n");
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_session__write_header(struct perf_session *session,
|
|
struct perf_evlist *evlist,
|
|
int fd, bool at_exit)
|
|
{
|
|
struct perf_file_header f_header;
|
|
struct perf_file_attr f_attr;
|
|
struct perf_header *header = &session->header;
|
|
struct perf_evsel *evsel;
|
|
u64 attr_offset;
|
|
int err;
|
|
|
|
lseek(fd, sizeof(f_header), SEEK_SET);
|
|
|
|
list_for_each_entry(evsel, &evlist->entries, node) {
|
|
evsel->id_offset = lseek(fd, 0, SEEK_CUR);
|
|
err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf header\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
attr_offset = lseek(fd, 0, SEEK_CUR);
|
|
|
|
list_for_each_entry(evsel, &evlist->entries, node) {
|
|
f_attr = (struct perf_file_attr){
|
|
.attr = evsel->attr,
|
|
.ids = {
|
|
.offset = evsel->id_offset,
|
|
.size = evsel->ids * sizeof(u64),
|
|
}
|
|
};
|
|
err = do_write(fd, &f_attr, sizeof(f_attr));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf header attribute\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
header->data_offset = lseek(fd, 0, SEEK_CUR);
|
|
header->feat_offset = header->data_offset + header->data_size;
|
|
|
|
if (at_exit) {
|
|
err = perf_header__adds_write(header, evlist, fd);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
f_header = (struct perf_file_header){
|
|
.magic = PERF_MAGIC,
|
|
.size = sizeof(f_header),
|
|
.attr_size = sizeof(f_attr),
|
|
.attrs = {
|
|
.offset = attr_offset,
|
|
.size = evlist->nr_entries * sizeof(f_attr),
|
|
},
|
|
.data = {
|
|
.offset = header->data_offset,
|
|
.size = header->data_size,
|
|
},
|
|
/* event_types is ignored, store zeros */
|
|
};
|
|
|
|
memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
err = do_write(fd, &f_header, sizeof(f_header));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf header\n");
|
|
return err;
|
|
}
|
|
lseek(fd, header->data_offset + header->data_size, SEEK_SET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_header__getbuffer64(struct perf_header *header,
|
|
int fd, void *buf, size_t size)
|
|
{
|
|
if (readn(fd, buf, size) <= 0)
|
|
return -1;
|
|
|
|
if (header->needs_swap)
|
|
mem_bswap_64(buf, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_header__process_sections(struct perf_header *header, int fd,
|
|
void *data,
|
|
int (*process)(struct perf_file_section *section,
|
|
struct perf_header *ph,
|
|
int feat, int fd, void *data))
|
|
{
|
|
struct perf_file_section *feat_sec, *sec;
|
|
int nr_sections;
|
|
int sec_size;
|
|
int feat;
|
|
int err;
|
|
|
|
nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
|
|
if (!nr_sections)
|
|
return 0;
|
|
|
|
feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
|
|
if (!feat_sec)
|
|
return -1;
|
|
|
|
sec_size = sizeof(*feat_sec) * nr_sections;
|
|
|
|
lseek(fd, header->feat_offset, SEEK_SET);
|
|
|
|
err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
|
|
if (err < 0)
|
|
goto out_free;
|
|
|
|
for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
|
|
err = process(sec++, header, feat, fd, data);
|
|
if (err < 0)
|
|
goto out_free;
|
|
}
|
|
err = 0;
|
|
out_free:
|
|
free(feat_sec);
|
|
return err;
|
|
}
|
|
|
|
static const int attr_file_abi_sizes[] = {
|
|
[0] = PERF_ATTR_SIZE_VER0,
|
|
[1] = PERF_ATTR_SIZE_VER1,
|
|
[2] = PERF_ATTR_SIZE_VER2,
|
|
[3] = PERF_ATTR_SIZE_VER3,
|
|
0,
|
|
};
|
|
|
|
/*
|
|
* In the legacy file format, the magic number is not used to encode endianness.
|
|
* hdr_sz was used to encode endianness. But given that hdr_sz can vary based
|
|
* on ABI revisions, we need to try all combinations for all endianness to
|
|
* detect the endianness.
|
|
*/
|
|
static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
|
|
{
|
|
uint64_t ref_size, attr_size;
|
|
int i;
|
|
|
|
for (i = 0 ; attr_file_abi_sizes[i]; i++) {
|
|
ref_size = attr_file_abi_sizes[i]
|
|
+ sizeof(struct perf_file_section);
|
|
if (hdr_sz != ref_size) {
|
|
attr_size = bswap_64(hdr_sz);
|
|
if (attr_size != ref_size)
|
|
continue;
|
|
|
|
ph->needs_swap = true;
|
|
}
|
|
pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
|
|
i,
|
|
ph->needs_swap);
|
|
return 0;
|
|
}
|
|
/* could not determine endianness */
|
|
return -1;
|
|
}
|
|
|
|
#define PERF_PIPE_HDR_VER0 16
|
|
|
|
static const size_t attr_pipe_abi_sizes[] = {
|
|
[0] = PERF_PIPE_HDR_VER0,
|
|
0,
|
|
};
|
|
|
|
/*
|
|
* In the legacy pipe format, there is an implicit assumption that endiannesss
|
|
* between host recording the samples, and host parsing the samples is the
|
|
* same. This is not always the case given that the pipe output may always be
|
|
* redirected into a file and analyzed on a different machine with possibly a
|
|
* different endianness and perf_event ABI revsions in the perf tool itself.
|
|
*/
|
|
static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
|
|
{
|
|
u64 attr_size;
|
|
int i;
|
|
|
|
for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
|
|
if (hdr_sz != attr_pipe_abi_sizes[i]) {
|
|
attr_size = bswap_64(hdr_sz);
|
|
if (attr_size != hdr_sz)
|
|
continue;
|
|
|
|
ph->needs_swap = true;
|
|
}
|
|
pr_debug("Pipe ABI%d perf.data file detected\n", i);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
bool is_perf_magic(u64 magic)
|
|
{
|
|
if (!memcmp(&magic, __perf_magic1, sizeof(magic))
|
|
|| magic == __perf_magic2
|
|
|| magic == __perf_magic2_sw)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int check_magic_endian(u64 magic, uint64_t hdr_sz,
|
|
bool is_pipe, struct perf_header *ph)
|
|
{
|
|
int ret;
|
|
|
|
/* check for legacy format */
|
|
ret = memcmp(&magic, __perf_magic1, sizeof(magic));
|
|
if (ret == 0) {
|
|
ph->version = PERF_HEADER_VERSION_1;
|
|
pr_debug("legacy perf.data format\n");
|
|
if (is_pipe)
|
|
return try_all_pipe_abis(hdr_sz, ph);
|
|
|
|
return try_all_file_abis(hdr_sz, ph);
|
|
}
|
|
/*
|
|
* the new magic number serves two purposes:
|
|
* - unique number to identify actual perf.data files
|
|
* - encode endianness of file
|
|
*/
|
|
|
|
/* check magic number with one endianness */
|
|
if (magic == __perf_magic2)
|
|
return 0;
|
|
|
|
/* check magic number with opposite endianness */
|
|
if (magic != __perf_magic2_sw)
|
|
return -1;
|
|
|
|
ph->needs_swap = true;
|
|
ph->version = PERF_HEADER_VERSION_2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_file_header__read(struct perf_file_header *header,
|
|
struct perf_header *ph, int fd)
|
|
{
|
|
int ret;
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
|
|
ret = readn(fd, header, sizeof(*header));
|
|
if (ret <= 0)
|
|
return -1;
|
|
|
|
if (check_magic_endian(header->magic,
|
|
header->attr_size, false, ph) < 0) {
|
|
pr_debug("magic/endian check failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ph->needs_swap) {
|
|
mem_bswap_64(header, offsetof(struct perf_file_header,
|
|
adds_features));
|
|
}
|
|
|
|
if (header->size != sizeof(*header)) {
|
|
/* Support the previous format */
|
|
if (header->size == offsetof(typeof(*header), adds_features))
|
|
bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
|
|
else
|
|
return -1;
|
|
} else if (ph->needs_swap) {
|
|
/*
|
|
* feature bitmap is declared as an array of unsigned longs --
|
|
* not good since its size can differ between the host that
|
|
* generated the data file and the host analyzing the file.
|
|
*
|
|
* We need to handle endianness, but we don't know the size of
|
|
* the unsigned long where the file was generated. Take a best
|
|
* guess at determining it: try 64-bit swap first (ie., file
|
|
* created on a 64-bit host), and check if the hostname feature
|
|
* bit is set (this feature bit is forced on as of fbe96f2).
|
|
* If the bit is not, undo the 64-bit swap and try a 32-bit
|
|
* swap. If the hostname bit is still not set (e.g., older data
|
|
* file), punt and fallback to the original behavior --
|
|
* clearing all feature bits and setting buildid.
|
|
*/
|
|
mem_bswap_64(&header->adds_features,
|
|
BITS_TO_U64(HEADER_FEAT_BITS));
|
|
|
|
if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
|
|
/* unswap as u64 */
|
|
mem_bswap_64(&header->adds_features,
|
|
BITS_TO_U64(HEADER_FEAT_BITS));
|
|
|
|
/* unswap as u32 */
|
|
mem_bswap_32(&header->adds_features,
|
|
BITS_TO_U32(HEADER_FEAT_BITS));
|
|
}
|
|
|
|
if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
|
|
bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
|
|
set_bit(HEADER_BUILD_ID, header->adds_features);
|
|
}
|
|
}
|
|
|
|
memcpy(&ph->adds_features, &header->adds_features,
|
|
sizeof(ph->adds_features));
|
|
|
|
ph->data_offset = header->data.offset;
|
|
ph->data_size = header->data.size;
|
|
ph->feat_offset = header->data.offset + header->data.size;
|
|
return 0;
|
|
}
|
|
|
|
static int perf_file_section__process(struct perf_file_section *section,
|
|
struct perf_header *ph,
|
|
int feat, int fd, void *data)
|
|
{
|
|
if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
|
|
pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
|
|
"%d, continuing...\n", section->offset, feat);
|
|
return 0;
|
|
}
|
|
|
|
if (feat >= HEADER_LAST_FEATURE) {
|
|
pr_debug("unknown feature %d, continuing...\n", feat);
|
|
return 0;
|
|
}
|
|
|
|
if (!feat_ops[feat].process)
|
|
return 0;
|
|
|
|
return feat_ops[feat].process(section, ph, fd, data);
|
|
}
|
|
|
|
static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
|
|
struct perf_header *ph, int fd,
|
|
bool repipe)
|
|
{
|
|
int ret;
|
|
|
|
ret = readn(fd, header, sizeof(*header));
|
|
if (ret <= 0)
|
|
return -1;
|
|
|
|
if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
|
|
pr_debug("endian/magic failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ph->needs_swap)
|
|
header->size = bswap_64(header->size);
|
|
|
|
if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_header__read_pipe(struct perf_session *session)
|
|
{
|
|
struct perf_header *header = &session->header;
|
|
struct perf_pipe_file_header f_header;
|
|
|
|
if (perf_file_header__read_pipe(&f_header, header, session->fd,
|
|
session->repipe) < 0) {
|
|
pr_debug("incompatible file format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_attr(int fd, struct perf_header *ph,
|
|
struct perf_file_attr *f_attr)
|
|
{
|
|
struct perf_event_attr *attr = &f_attr->attr;
|
|
size_t sz, left;
|
|
size_t our_sz = sizeof(f_attr->attr);
|
|
int ret;
|
|
|
|
memset(f_attr, 0, sizeof(*f_attr));
|
|
|
|
/* read minimal guaranteed structure */
|
|
ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
|
|
if (ret <= 0) {
|
|
pr_debug("cannot read %d bytes of header attr\n",
|
|
PERF_ATTR_SIZE_VER0);
|
|
return -1;
|
|
}
|
|
|
|
/* on file perf_event_attr size */
|
|
sz = attr->size;
|
|
|
|
if (ph->needs_swap)
|
|
sz = bswap_32(sz);
|
|
|
|
if (sz == 0) {
|
|
/* assume ABI0 */
|
|
sz = PERF_ATTR_SIZE_VER0;
|
|
} else if (sz > our_sz) {
|
|
pr_debug("file uses a more recent and unsupported ABI"
|
|
" (%zu bytes extra)\n", sz - our_sz);
|
|
return -1;
|
|
}
|
|
/* what we have not yet read and that we know about */
|
|
left = sz - PERF_ATTR_SIZE_VER0;
|
|
if (left) {
|
|
void *ptr = attr;
|
|
ptr += PERF_ATTR_SIZE_VER0;
|
|
|
|
ret = readn(fd, ptr, left);
|
|
}
|
|
/* read perf_file_section, ids are read in caller */
|
|
ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
|
|
|
|
return ret <= 0 ? -1 : 0;
|
|
}
|
|
|
|
static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
|
|
struct pevent *pevent)
|
|
{
|
|
struct event_format *event;
|
|
char bf[128];
|
|
|
|
/* already prepared */
|
|
if (evsel->tp_format)
|
|
return 0;
|
|
|
|
if (pevent == NULL) {
|
|
pr_debug("broken or missing trace data\n");
|
|
return -1;
|
|
}
|
|
|
|
event = pevent_find_event(pevent, evsel->attr.config);
|
|
if (event == NULL)
|
|
return -1;
|
|
|
|
if (!evsel->name) {
|
|
snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
|
|
evsel->name = strdup(bf);
|
|
if (evsel->name == NULL)
|
|
return -1;
|
|
}
|
|
|
|
evsel->tp_format = event;
|
|
return 0;
|
|
}
|
|
|
|
static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
|
|
struct pevent *pevent)
|
|
{
|
|
struct perf_evsel *pos;
|
|
|
|
list_for_each_entry(pos, &evlist->entries, node) {
|
|
if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
|
|
perf_evsel__prepare_tracepoint_event(pos, pevent))
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_session__read_header(struct perf_session *session)
|
|
{
|
|
struct perf_header *header = &session->header;
|
|
struct perf_file_header f_header;
|
|
struct perf_file_attr f_attr;
|
|
u64 f_id;
|
|
int nr_attrs, nr_ids, i, j;
|
|
int fd = session->fd;
|
|
|
|
session->evlist = perf_evlist__new();
|
|
if (session->evlist == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (session->fd_pipe)
|
|
return perf_header__read_pipe(session);
|
|
|
|
if (perf_file_header__read(&f_header, header, fd) < 0)
|
|
return -EINVAL;
|
|
|
|
nr_attrs = f_header.attrs.size / f_header.attr_size;
|
|
lseek(fd, f_header.attrs.offset, SEEK_SET);
|
|
|
|
for (i = 0; i < nr_attrs; i++) {
|
|
struct perf_evsel *evsel;
|
|
off_t tmp;
|
|
|
|
if (read_attr(fd, header, &f_attr) < 0)
|
|
goto out_errno;
|
|
|
|
if (header->needs_swap)
|
|
perf_event__attr_swap(&f_attr.attr);
|
|
|
|
tmp = lseek(fd, 0, SEEK_CUR);
|
|
evsel = perf_evsel__new(&f_attr.attr, i);
|
|
|
|
if (evsel == NULL)
|
|
goto out_delete_evlist;
|
|
|
|
evsel->needs_swap = header->needs_swap;
|
|
/*
|
|
* Do it before so that if perf_evsel__alloc_id fails, this
|
|
* entry gets purged too at perf_evlist__delete().
|
|
*/
|
|
perf_evlist__add(session->evlist, evsel);
|
|
|
|
nr_ids = f_attr.ids.size / sizeof(u64);
|
|
/*
|
|
* We don't have the cpu and thread maps on the header, so
|
|
* for allocating the perf_sample_id table we fake 1 cpu and
|
|
* hattr->ids threads.
|
|
*/
|
|
if (perf_evsel__alloc_id(evsel, 1, nr_ids))
|
|
goto out_delete_evlist;
|
|
|
|
lseek(fd, f_attr.ids.offset, SEEK_SET);
|
|
|
|
for (j = 0; j < nr_ids; j++) {
|
|
if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
|
|
goto out_errno;
|
|
|
|
perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
|
|
}
|
|
|
|
lseek(fd, tmp, SEEK_SET);
|
|
}
|
|
|
|
symbol_conf.nr_events = nr_attrs;
|
|
|
|
perf_header__process_sections(header, fd, &session->pevent,
|
|
perf_file_section__process);
|
|
|
|
if (perf_evlist__prepare_tracepoint_events(session->evlist,
|
|
session->pevent))
|
|
goto out_delete_evlist;
|
|
|
|
return 0;
|
|
out_errno:
|
|
return -errno;
|
|
|
|
out_delete_evlist:
|
|
perf_evlist__delete(session->evlist);
|
|
session->evlist = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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 = malloc(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_attrs(struct perf_tool *tool,
|
|
struct perf_session *session,
|
|
perf_event__handler_t process)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
int err = 0;
|
|
|
|
list_for_each_entry(evsel, &session->evlist->entries, node) {
|
|
err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
|
|
evsel->id, process);
|
|
if (err) {
|
|
pr_debug("failed to create perf header attribute\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_evlist **pevlist)
|
|
{
|
|
u32 i, ids, n_ids;
|
|
struct perf_evsel *evsel;
|
|
struct perf_evlist *evlist = *pevlist;
|
|
|
|
if (evlist == NULL) {
|
|
*pevlist = evlist = perf_evlist__new();
|
|
if (evlist == NULL)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries);
|
|
if (evsel == NULL)
|
|
return -ENOMEM;
|
|
|
|
perf_evlist__add(evlist, evsel);
|
|
|
|
ids = event->header.size;
|
|
ids -= (void *)&event->attr.id - (void *)event;
|
|
n_ids = ids / sizeof(u64);
|
|
/*
|
|
* We don't have the cpu and thread maps on the header, so
|
|
* for allocating the perf_sample_id table we fake 1 cpu and
|
|
* hattr->ids threads.
|
|
*/
|
|
if (perf_evsel__alloc_id(evsel, 1, n_ids))
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < n_ids; i++) {
|
|
perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
|
|
}
|
|
|
|
symbol_conf.nr_events = evlist->nr_entries;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
|
|
struct perf_evlist *evlist,
|
|
perf_event__handler_t process)
|
|
{
|
|
union perf_event ev;
|
|
struct tracing_data *tdata;
|
|
ssize_t size = 0, aligned_size = 0, padding;
|
|
int err __maybe_unused = 0;
|
|
|
|
/*
|
|
* 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->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);
|
|
|
|
write_padded(fd, NULL, 0, padding);
|
|
|
|
return aligned_size;
|
|
}
|
|
|
|
int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
ssize_t size_read, padding, size = event->tracing_data.size;
|
|
off_t offset = lseek(session->fd, 0, SEEK_CUR);
|
|
char buf[BUFSIZ];
|
|
|
|
/* setup for reading amidst mmap */
|
|
lseek(session->fd, offset + sizeof(struct tracing_data_event),
|
|
SEEK_SET);
|
|
|
|
size_read = trace_report(session->fd, &session->pevent,
|
|
session->repipe);
|
|
padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
|
|
|
|
if (readn(session->fd, buf, padding) < 0) {
|
|
pr_err("%s: reading input file", __func__);
|
|
return -1;
|
|
}
|
|
if (session->repipe) {
|
|
int retw = write(STDOUT_FILENO, buf, padding);
|
|
if (retw <= 0 || retw != padding) {
|
|
pr_err("%s: repiping tracing data padding", __func__);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (size_read + padding != size) {
|
|
pr_err("%s: tracing data size mismatch", __func__);
|
|
return -1;
|
|
}
|
|
|
|
perf_evlist__prepare_tracepoint_events(session->evlist,
|
|
session->pevent);
|
|
|
|
return size_read + padding;
|
|
}
|
|
|
|
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;
|
|
int err = 0;
|
|
|
|
if (!pos->hit)
|
|
return err;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
|
|
len = pos->long_name_len + 1;
|
|
len = PERF_ALIGN(len, NAME_ALIGN);
|
|
memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
|
|
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);
|
|
|
|
err = process(tool, &ev, NULL, machine);
|
|
|
|
return err;
|
|
}
|
|
|
|
int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
__event_process_build_id(&event->build_id,
|
|
event->build_id.filename,
|
|
session);
|
|
return 0;
|
|
}
|
|
|
|
void disable_buildid_cache(void)
|
|
{
|
|
no_buildid_cache = true;
|
|
}
|