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tests: add tests for perf_event_attr structure decoding in perf_event_open

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* configure.ac: Add checks for presence of various fields of struct
perf_event_attr defined in kernel headers.
* tests/perf_event_open.c: New file.
* tests/perf_event_open_unabbrev.c: Likewise.
* tests/perf_event_open.test: New test.
* tests/perf_event_open_unabbrev.test: Likewise.
* tests/.gitignore: Add perf_event_open, perf_event_open_unabbrev.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add perf_event_open.test, perf_event_open_unabbrev.test.
This commit is contained in:
Eugene Syromyatnikov 2016-10-03 01:35:53 +03:00
parent 6ed2a84aab
commit 015aee943e
7 changed files with 868 additions and 0 deletions
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24
configure.ac
View File

@ -347,6 +347,30 @@ AC_CHECK_MEMBERS(m4_normalize([
siginfo_t.si_overrun
]),,, [#include <signal.h>])
AC_CHECK_MEMBERS(m4_normalize([
struct perf_event_attr.precise_ip,
struct perf_event_attr.mmap_data,
struct perf_event_attr.sample_id_all,
struct perf_event_attr.exclude_host,
struct perf_event_attr.exclude_guest,
struct perf_event_attr.exclude_callchain_kernel,
struct perf_event_attr.exclude_callchain_user,
struct perf_event_attr.mmap2,
struct perf_event_attr.comm_exec,
struct perf_event_attr.use_clockid,
struct perf_event_attr.context_switch,
struct perf_event_attr.write_backward,
struct perf_event_attr.bp_type,
struct perf_event_attr.config1,
struct perf_event_attr.config2,
struct perf_event_attr.branch_sample_type,
struct perf_event_attr.sample_regs_user,
struct perf_event_attr.sample_stack_user,
struct perf_event_attr.sample_regs_intr,
struct perf_event_attr.aux_watermark,
struct perf_event_attr.sample_max_stack
]),,, [#include <linux/perf_event.h>])
AC_CHECK_HEADERS(m4_normalize([
asm/cachectl.h
asm/sysmips.h

2
tests/.gitignore vendored
View File

@ -192,6 +192,8 @@ openat
pause
pc
perf_event_open_nonverbose
perf_event_open
perf_event_open_unabbrev
personality
pipe
poll

4
tests/Makefile.am
View File

@ -250,6 +250,8 @@ check_PROGRAMS = \
pause \
pc \
perf_event_open_nonverbose \
perf_event_open \
perf_event_open_unabbrev \
personality \
pipe \
poll \
@ -609,6 +611,8 @@ DECODER_TESTS = \
openat.test \
pause.test \
perf_event_open_nonverbose.test \
perf_event_open.test \
perf_event_open_unabbrev.test \
personality.test \
pipe.test \
poll.test \

822
tests/perf_event_open.c Normal file
View File

@ -0,0 +1,822 @@
/*
* Check verbose decoding of perf_event_open syscall.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <asm/unistd.h>
#if defined(__NR_perf_event_open) && defined(HAVE_LINUX_PERF_EVENT_H)
# include <inttypes.h>
# include <limits.h>
# include <stdbool.h>
# include <stddef.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
# include <linux/perf_event.h>
# include "xlat.h"
# include "xlat/perf_event_open_flags.h"
# include "xlat/perf_attr_size.h"
# if ULONG_MAX > UINT_MAX /* Poor man's "whether long is 8 bytes?" */
# define LONG_STR_PREFIX "ffffffff"
# else /* !(ULONG_MAX > UINT_MAX) */
# define LONG_STR_PREFIX ""
# endif /* ULONG_MAX > UINT_MAX */
# ifndef PERF_TYPE_BREAKPOINT
# define PERF_TYPE_BREAKPOINT 5
# endif
struct s32_val_str {
int32_t val;
const char *str;
};
struct u32_val_str {
uint32_t val;
const char *str;
};
struct u64_val_str {
uint64_t val;
const char *str;
};
/* In order to avoid endianess-specific hackery */
struct pea_flags {
uint64_t disabled :1,
inherit :1,
pinned :1,
exclusive :1,
exclude_user :1,
exclude_kernel :1,
exclude_hv :1,
exclude_idle :1,
mmap :1,
comm :1,
freq :1,
inherit_stat :1,
enable_on_exec :1,
task :1,
watermark :1,
precise_ip :2,
mmap_data :1,
sample_id_all :1,
exclude_host :1,
exclude_guest :1,
exclude_callchain_kernel :1,
exclude_callchain_user :1,
mmap2 :1,
comm_exec :1,
use_clockid :1,
context_switch :1,
write_backward :1,
__reserved_1 :36;
};
static const char *
printaddr(void *ptr)
{
static char buf[sizeof("0x") + sizeof(void *) * 2];
if (ptr == NULL)
return "NULL";
snprintf(buf, sizeof(buf), "%#lx", (unsigned long)ptr);
return buf;
}
/*
* Checklist:
*
* type - 8 IDs
* config - 13 IDs (0..11 + random), depends on type
* sample type - bitmask, up to 20 bits
* read_format - 5 IDs
* bp_type - 6, weird semantics (invalid/unknown)
* branch_sample_type - bitmask, 16 bits
* clockid - 13 values
*
* Unions:
* sample_period/sample_freq
* wakeup_event/wakeup_watermark
* bp_addr/config1
* bp_len/config2
*/
/*
* The main idea behind all those numerous ifdefs is checking against version of
* structure provided in kernel headers and not use one defined in strace
* headers (assume the case when suddenly we add flag without proper update of
* __reserved_1 field or something like this).
*/
static void
print_event_attr(struct perf_event_attr *attr_ptr, size_t size,
const char *type, const char *config, const char *sample_type,
const char *read_format, const char *precise_ip_desc,
const char *bp_type, const char *branch_sample_type,
const char *clockid, uint32_t available_size)
{
/*
* Currently, strace supports version 5 of the structure, which is
* 112 bytes in size.
*/
enum {
STRACE_PEA_ABBREV_SIZE =
offsetof(struct perf_event_attr, config) +
sizeof(attr_ptr->config),
STRACE_PEA_SIZE = 112,
};
uint32_t read_size;
struct perf_event_attr *attr;
# if VERBOSE
uint32_t cutoff;
uint64_t val;
uint64_t use_clockid;
union {
struct pea_flags flags;
uint64_t raw;
} flags_data;
# endif
read_size =
# if !VERBOSE
STRACE_PEA_ABBREV_SIZE;
# else
size < STRACE_PEA_SIZE ?
(size ? size : PERF_ATTR_SIZE_VER0) : STRACE_PEA_SIZE;
# endif
if (read_size > available_size) {
printf("%s", printaddr(attr_ptr));
return;
}
/*
* Replicate kernel's behaviour regarding copying structure from
* userspace.
*/
attr = calloc(1, STRACE_PEA_SIZE);
if (!attr)
error_msg_and_fail("calloc");
memcpy(attr, attr_ptr, read_size);
if (size && (size < PERF_ATTR_SIZE_VER0)) {
printf("%s", printaddr(attr_ptr));
free(attr);
return;
}
printf("{type=%s, size=", type);
if (size != attr->size) {
printxval(perf_attr_size, size, "PERF_ATTR_SIZE_???");
printf(" => ");
}
printxval(perf_attr_size, attr->size, "PERF_ATTR_SIZE_???");
printf(", config=%s, ", config);
if (!size)
size = PERF_ATTR_SIZE_VER0;
# if !VERBOSE
printf("...}");
# else /* !VERBOSE */
printf("%s=%" PRI__u64", sample_type=%s, read_format=%s",
attr->freq ? "sample_freq" : "sample_period",
attr->freq ? attr->sample_freq : attr->sample_period,
sample_type, read_format);
printf(", disabled=%u"
", inherit=%u"
", pinned=%u"
", exclusive=%u"
", exclusive_user=%u"
", exclude_kernel=%u"
", exclude_hv=%u"
", exclude_idle=%u"
", mmap=%u"
", comm=%u"
", freq=%u"
", inherit_stat=%u"
", enable_on_exec=%u"
", task=%u"
", watermark=%u",
attr->disabled,
attr->inherit,
attr->pinned,
attr->exclusive,
attr->exclude_user,
attr->exclude_kernel,
attr->exclude_hv,
attr->exclude_idle,
attr->mmap,
attr->comm,
attr->freq,
attr->inherit_stat,
attr->enable_on_exec,
attr->task,
attr->watermark);
flags_data.raw = ((uint64_t *) attr)[5];
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_PRECISE_IP
attr->precise_ip;
# else
flags_data.flags.precise_ip;
# endif
printf(", precise_ip=%" PRIu64 " /* %s */", val, precise_ip_desc);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_MMAP_DATA
attr->mmap_data;
# else
flags_data.flags.mmap_data;
# endif
printf(", mmap_data=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_SAMPLE_ID_ALL
attr->sample_id_all;
# else
flags_data.flags.sample_id_all;
# endif
printf(", sample_id_all=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_EXCLUDE_HOST
attr->exclude_host;
# else
flags_data.flags.exclude_host;
# endif
printf(", exclude_host=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_EXCLUDE_GUEST
attr->exclude_guest;
# else
flags_data.flags.exclude_guest;
# endif
printf(", exclude_guest=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_EXCLUDE_CALLCHAIN_KERNEL
attr->exclude_callchain_kernel;
# else
flags_data.flags.exclude_callchain_kernel;
# endif
printf(", exclude_callchain_kernel=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_EXCLUDE_CALLCHAIN_USER
attr->exclude_callchain_user;
# else
flags_data.flags.exclude_callchain_user;
# endif
printf(", exclude_callchain_user=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_MMAP2
attr->mmap2;
# else
flags_data.flags.mmap2;
# endif
printf(", mmap2=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_COMM_EXEC
attr->comm_exec;
# else
flags_data.flags.comm_exec;
# endif
printf(", comm_exec=%" PRIu64, val);
use_clockid = val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_USE_CLOCKID
attr->use_clockid;
# else
flags_data.flags.use_clockid;
# endif
printf(", use_clockid=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_CONTEXT_SWITCH
attr->context_switch;
# else
flags_data.flags.context_switch;
# endif
printf(", context_switch=%" PRIu64, val);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_WRITE_BACKWARD
attr->write_backward;
# else
flags_data.flags.write_backward;
# endif
printf(", write_backward=%" PRIu64, val);
val = flags_data.flags.__reserved_1;
if (val)
printf(", __reserved_1=%#" PRIx64 " /* Bits 63..28 */", val);
printf(", %s=%u",
attr->watermark ? "wakeup_watermark" : "wakeup_events",
attr->watermark ? attr->wakeup_watermark : attr->wakeup_events);
if (attr->type == PERF_TYPE_BREAKPOINT)
printf(", bp_type=%s", bp_type);
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_CONFIG1
attr->config1;
# else
((uint64_t *) attr)[56 / sizeof(uint64_t)];
# endif
printf(", %s=%#" PRIx64,
attr->type == PERF_TYPE_BREAKPOINT ? "bp_addr" : "config1",
val);
/* End of version 0 of the structure */
if (size <= 64) {
cutoff = 64;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_CONFIG2
attr->config2;
# else
((uint64_t *) attr)[64 / sizeof(uint64_t)];
# endif
if (attr->type == PERF_TYPE_BREAKPOINT)
printf(", bp_len=%" PRIu64, val);
else
printf(", config2=%#" PRIx64, val);
/* End of version 1 of the structure */
if (size <= 72) {
cutoff = 72;
goto end;
}
/*
* Print branch sample type only in case PERF_SAMPLE_BRANCH_STACK
* is set in the sample_type field.
*/
if (attr->sample_type & (1 << 11))
printf(", branch_sample_type=%s", branch_sample_type);
/* End of version 2 of the structure */
if (size <= 80) {
cutoff = 80;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_SAMPLE_REGS_USER
attr->sample_regs_user;
# else
((uint64_t *) attr)[80 / sizeof(uint64_t)];
# endif
printf(", sample_regs_user=%#" PRIx64, val);
if (size <= 88) {
cutoff = 88;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_SAMPLE_STACK_USER
attr->sample_stack_user;
# else
((uint32_t *) attr)[88 / sizeof(uint32_t)];
# endif
/*
* Print branch sample type only in case PERF_SAMPLE_STACK_USER
* is set in the sample_type field.
*/
if (attr->sample_type & (1 << 13))
printf(", sample_stack_user=%#" PRIx32, (uint32_t) val);
if (size <= 92) {
cutoff = 92;
goto end;
}
if (use_clockid)
printf(", clockid=%s", clockid);
/* End of version 3 of the structure */
if (size <= 96) {
cutoff = 96;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_SAMPLE_REGS_INTR
attr->sample_regs_intr;
# else
((uint64_t *) attr)[96 / sizeof(uint64_t)];
# endif
printf(", sample_regs_intr=%#" PRIx64, val);
/* End of version 4 of the structure */
if (size <= 104) {
cutoff =104;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_AUX_WATERMARK
attr->aux_watermark;
# else
((uint32_t *) attr)[104 / sizeof(uint32_t)];
# endif
printf(", aux_watermark=%" PRIu32, (uint32_t) val);
if (size <= 108) {
cutoff =108;
goto end;
}
val =
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_SAMPLE_MAX_STACK
attr->sample_max_stack;
# else
((uint16_t *) attr)[108 / sizeof(uint16_t)];
# endif
printf(", sample_max_stack=%" PRIu16, (uint16_t) val);
if (size <= 110) {
cutoff =110;
goto end;
}
cutoff = STRACE_PEA_SIZE;
end:
if (size > cutoff)
printf(", ...");
printf("}");
# endif /* !VERBOSE */
free(attr);
}
/* These require aligned access, so no byte-grain checks possible */
# if defined SPARC || defined SPARC64 || defined POWERPC || defined POWERPC64
# define ATTR_REC(sz) { tail_alloc((sz + 7) & ~7), sz }
# else
# define ATTR_REC(sz) { tail_alloc(sz), sz }
# endif
# define BRANCH_TYPE_ALL \
"PERF_SAMPLE_BRANCH_USER|" \
"PERF_SAMPLE_BRANCH_KERNEL|" \
"PERF_SAMPLE_BRANCH_HV|" \
"PERF_SAMPLE_BRANCH_ANY|" \
"PERF_SAMPLE_BRANCH_ANY_CALL|" \
"PERF_SAMPLE_BRANCH_ANY_RETURN|" \
"PERF_SAMPLE_BRANCH_IND_CALL|" \
"PERF_SAMPLE_BRANCH_ABORT_TX|" \
"PERF_SAMPLE_BRANCH_IN_TX|" \
"PERF_SAMPLE_BRANCH_NO_TX|" \
"PERF_SAMPLE_BRANCH_COND|" \
"PERF_SAMPLE_BRANCH_CALL_STACK|" \
"PERF_SAMPLE_BRANCH_IND_JUMP|" \
"PERF_SAMPLE_BRANCH_CALL|" \
"PERF_SAMPLE_BRANCH_NO_FLAGS|" \
"PERF_SAMPLE_BRANCH_NO_CYCLES"
int
main(void)
{
static const size_t attr_small_size = PERF_ATTR_SIZE_VER0 - 8;
static const size_t attr_v0_size = PERF_ATTR_SIZE_VER0;
static const size_t attr_v1_size = PERF_ATTR_SIZE_VER1;
static const size_t attr_v2_size = PERF_ATTR_SIZE_VER2;
static const size_t attr_v2_5_size = PERF_ATTR_SIZE_VER2 + 8;
static const size_t attr_v2_75_size = PERF_ATTR_SIZE_VER2 + 12;
static const size_t attr_v3_size = PERF_ATTR_SIZE_VER3;
static const size_t attr_v4_size = PERF_ATTR_SIZE_VER4;
static const size_t attr_v4_5_size = PERF_ATTR_SIZE_VER4 + 4;
static const size_t attr_v4_625_size = PERF_ATTR_SIZE_VER4 + 5;
static const size_t attr_v4_875_size = PERF_ATTR_SIZE_VER4 + 7;
static const size_t attr_v5_size = PERF_ATTR_SIZE_VER5;
static const size_t attr_big_size = PERF_ATTR_SIZE_VER5 + 32;
static const struct u64_val_str attr_types[] = {
{ ARG_STR(PERF_TYPE_HARDWARE) },
{ ARG_STR(PERF_TYPE_SOFTWARE) },
{ ARG_STR(PERF_TYPE_TRACEPOINT) },
{ ARG_STR(PERF_TYPE_HW_CACHE) },
{ ARG_STR(PERF_TYPE_RAW) },
{ ARG_STR(PERF_TYPE_BREAKPOINT) },
{ ARG_STR(0x6) " /* PERF_TYPE_??? */" },
{ ARG_STR(0xdeadc0de) " /* PERF_TYPE_??? */" },
};
static const struct u64_val_str
attr_configs[ARRAY_SIZE(attr_types)][3] = {
/* PERF_TYPE_HARDWARE */ {
{ 9, "PERF_COUNT_HW_REF_CPU_CYCLES" },
{ 10, "0xa /* PERF_COUNT_HW_??? */" },
{ ARG_ULL_STR(0xfaceca75deadb0d4)
" /* PERF_COUNT_HW_??? */" },
},
/* PERF_TYPE_SOFTWARE */ {
{ 10, "PERF_COUNT_SW_BPF_OUTPUT" },
{ 11, "0xb /* PERF_COUNT_SW_??? */" },
{ ARG_ULL_STR(0xdec0ded1dec0ded2)
" /* PERF_COUNT_SW_??? */" },
},
/* PERF_TYPE_TRACEPOINT */ {
{ ARG_STR(0) },
{ 4207856245U, "4207856245" },
{ ARG_ULL_STR(16051074073505095380) },
},
/* PERF_TYPE_HW_CACHE */ {
{ 0, "PERF_COUNT_HW_CACHE_L1D|"
"PERF_COUNT_HW_CACHE_OP_READ<<8|"
"PERF_COUNT_HW_CACHE_RESULT_ACCESS<<16" },
{ 0x020207, "0x7 /* PERF_COUNT_HW_CACHE_??? */|"
"PERF_COUNT_HW_CACHE_OP_PREFETCH<<8|"
"0x2 /* PERF_COUNT_HW_CACHE_RESULT_??? */<<16" },
{ 0xdeadf157ed010306ULL, "PERF_COUNT_HW_CACHE_NODE|"
"0x3 /* PERF_COUNT_HW_CACHE_OP_??? */<<8|"
"PERF_COUNT_HW_CACHE_RESULT_MISS<<16|"
"0xdeadf157ed<<24 "
"/* PERF_COUNT_HW_CACHE_??? */" },
},
/* PERF_TYPE_RAW */ {
{ ARG_STR(0) },
{ ARG_STR(0xda7a1057) },
{ ARG_ULL_STR(0xdec0ded7dec0ded8) },
},
/* PERF_TYPE_BREAKPOINT */ {
{ ARG_STR(0) },
{ ARG_STR(0xbadc0ded) },
{ ARG_ULL_STR(0xdec0ded9dec0deda) },
},
/* invalid 1 */ {
{ ARG_STR(0) },
{ ARG_STR(0xbeeff00d) },
{ ARG_ULL_STR(0xdec0dedbdec0dedc) },
},
/* invalid 2 */ {
{ ARG_STR(0) },
{ ARG_STR(0xca75dead) },
{ ARG_ULL_STR(0xdec0dedddec0dede) },
},
};
static const struct u64_val_str sample_types[] = {
{ ARG_STR(0) },
{ 0x800, "PERF_SAMPLE_BRANCH_STACK" },
{ ARG_ULL_STR(0xdeadc0deda780000) " /* PERF_SAMPLE_??? */" },
{ 0xffffffffffffffffULL,
"PERF_SAMPLE_IP|PERF_SAMPLE_TID|PERF_SAMPLE_TIME|"
"PERF_SAMPLE_ADDR|PERF_SAMPLE_READ|"
"PERF_SAMPLE_CALLCHAIN|PERF_SAMPLE_ID|PERF_SAMPLE_CPU|"
"PERF_SAMPLE_PERIOD|PERF_SAMPLE_STREAM_ID|"
"PERF_SAMPLE_RAW|PERF_SAMPLE_BRANCH_STACK|"
"PERF_SAMPLE_REGS_USER|PERF_SAMPLE_STACK_USER|"
"PERF_SAMPLE_WEIGHT|PERF_SAMPLE_DATA_SRC|"
"PERF_SAMPLE_IDENTIFIER|PERF_SAMPLE_TRANSACTION|"
"PERF_SAMPLE_REGS_INTR|0xfffffffffff80000" },
};
static const struct u64_val_str read_formats[] = {
{ ARG_STR(0) },
{ ARG_STR(PERF_FORMAT_TOTAL_TIME_ENABLED) },
{ 0xf, "PERF_FORMAT_TOTAL_TIME_ENABLED|"
"PERF_FORMAT_TOTAL_TIME_RUNNING|"
"PERF_FORMAT_ID|PERF_FORMAT_GROUP" },
{ ARG_ULL_STR(0xdeadf157dec0ded0) " /* PERF_FORMAT_??? */" },
{ 0xffffffffffffffffULL,
"PERF_FORMAT_TOTAL_TIME_ENABLED|"
"PERF_FORMAT_TOTAL_TIME_RUNNING|"
"PERF_FORMAT_ID|PERF_FORMAT_GROUP|"
"0xfffffffffffffff0" },
};
static const char *precise_ip_descs[] = {
"arbitrary skid",
"constant skid",
"requested to have 0 skid",
"must have 0 skid",
};
static const struct u32_val_str bp_types[] = {
{ 0, "HW_BREAKPOINT_EMPTY" },
{ 1, "HW_BREAKPOINT_R" },
{ 3, "HW_BREAKPOINT_RW" },
{ 5, "0x5 /* HW_BREAKPOINT_INVALID */" },
{ 8, "0x8 /* HW_BREAKPOINT_??? */" },
{ ARG_STR(0xface1e55) " /* HW_BREAKPOINT_??? */" },
};
static const struct u64_val_str branch_sample_types[] = {
{ ARG_STR(0) },
{ 0x80, "PERF_SAMPLE_BRANCH_ABORT_TX" },
{ 0xffff, BRANCH_TYPE_ALL },
{ ARG_ULL_STR(0xdeadcaffeeed0000)
" /* PERF_SAMPLE_BRANCH_??? */" },
{ 0xffffffffffffffffULL,
BRANCH_TYPE_ALL "|0xffffffffffff0000" }
};
static const struct s32_val_str clockids[] = {
{ 11, "CLOCK_TAI" },
{ ARG_STR(0xc) " /* CLOCK_??? */" },
{ ARG_STR(0xbeeffeed) " /* CLOCK_??? */" },
};
struct {
struct perf_event_attr *ptr;
size_t size;
} attrs[] = {
ATTR_REC(sizeof(struct perf_event_attr)),
ATTR_REC(attr_v0_size),
ATTR_REC(attr_v1_size),
ATTR_REC(attr_v2_size),
ATTR_REC(attr_v2_5_size),
ATTR_REC(attr_v2_75_size),
ATTR_REC(attr_v3_size),
ATTR_REC(attr_v4_size),
ATTR_REC(attr_v4_5_size),
ATTR_REC(attr_v4_625_size),
ATTR_REC(attr_v4_875_size),
ATTR_REC(attr_v5_size),
ATTR_REC(attr_big_size),
};
struct perf_event_attr *small_attr = tail_alloc(sizeof(*small_attr));
struct {
struct perf_event_attr *attr;
pid_t pid;
int cpu;
int group_fd;
unsigned long flags;
const char *flags_str;
} args[] = {
{ NULL, 0xfacef00d, 0xbadabba7, -1,
(unsigned long) 0xFFFFFFFFFFFFFFFFLLU,
"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC|"
"0x" LONG_STR_PREFIX "fffffff0"
},
{ small_attr + 1, 0, 0, 0,
0, "0" },
{ small_attr, -1, -1, 1,
PERF_FLAG_FD_NO_GROUP | PERF_FLAG_FD_OUTPUT |
PERF_FLAG_PID_CGROUP | PERF_FLAG_FD_CLOEXEC,
"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC" },
{ (struct perf_event_attr *) (uintptr_t) 0xfffffacefffffeedULL,
-100, 100, 0xface1e55,
PERF_FLAG_FD_CLOEXEC, "PERF_FLAG_FD_CLOEXEC" },
};
size_t i;
int rc;
fill_memory((char *) small_attr, sizeof(*small_attr));
small_attr->size = attr_small_size;
for (i = 0; i < ARRAY_SIZE(args); i++) {
rc = syscall(__NR_perf_event_open, args[i].attr, args[i].pid,
args[i].cpu, args[i].group_fd, args[i].flags);
printf("perf_event_open(%s, %d, %d, %d, %s) = %s\n",
printaddr(args[i].attr), args[i].pid, args[i].cpu,
args[i].group_fd, args[i].flags_str, sprintrc(rc));
}
for (i = 0; i < ARRAY_SIZE(attrs) * ARRAY_SIZE(attr_types) *
ARRAY_SIZE(attr_configs[0]) + 1; i++) {
struct perf_event_attr *attr = attrs[i % ARRAY_SIZE(attrs)].ptr;
uint32_t size = attrs[i % ARRAY_SIZE(attrs)].size;
unsigned char fill_start = 0x80 + i;
size_t type_idx = i % ARRAY_SIZE(attr_types);
size_t config_idx = i % ARRAY_SIZE(attr_configs[0]);
size_t sample_type_idx = i % ARRAY_SIZE(sample_types);
size_t read_format_idx = i % ARRAY_SIZE(read_formats);
size_t bp_type_idx = (i / ARRAY_SIZE(attr_configs[0])) %
ARRAY_SIZE(bp_types);
size_t branch_sample_type_idx = (i / ARRAY_SIZE(sample_types)) %
ARRAY_SIZE(branch_sample_types);
size_t clockid_idx = i % ARRAY_SIZE(clockids);
size_t args_idx = i % ARRAY_SIZE(args);
const char *ip_desc_str;
fill_memory_ex((char *) attr, size,
fill_start, 0xff);
attr->type = attr_types[type_idx].val;
attr->size = size;
attr->config = attr_configs[type_idx][config_idx].val;
attr->sample_type = sample_types[sample_type_idx].val;
attr->read_format = read_formats[read_format_idx].val;
if ((i % 11) == 5)
attr->__reserved_1 = 0;
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_BP_TYPE
attr->bp_type =
# else
((uint32_t *) attr)[52 / sizeof(uint32_t)] =
# endif
bp_types[bp_type_idx].val;
if (size >= 80)
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_BRANCH_SAMPLE_TYPE
attr->branch_sample_type =
# else
((uint64_t *) attr)[72 / sizeof(uint64_t)] =
# endif
branch_sample_types[branch_sample_type_idx].val;
if (size >= 96)
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_CLOCKID
attr->clockid =
# else
((uint32_t *) attr)[92 / sizeof(uint32_t)] =
# endif
clockids[clockid_idx].val;
# ifdef HAVE_STRUCT_PERF_EVENT_ATTR_PRECISE_IP
ip_desc_str = precise_ip_descs[attr->precise_ip];
# else
union {
struct pea_flags flags;
uint64_t raw;
} flags_data = { .raw = ((uint64_t *) attr)[5] };
ip_desc_str = precise_ip_descs[flags_data.flags.precise_ip];
# endif
if (i == 0)
attr->size = size + 8;
if (i == 1)
attr->size = 0;
rc = syscall(__NR_perf_event_open, attr, args[args_idx].pid,
args[args_idx].cpu, args[args_idx].group_fd,
args[args_idx].flags);
printf("perf_event_open(");
print_event_attr(attr, i ? ((i == 1) ? 0 : size) : size + 8,
attr_types[type_idx].str,
attr_configs[type_idx][config_idx].str,
sample_types[sample_type_idx].str,
read_formats[read_format_idx].str,
ip_desc_str,
bp_types[bp_type_idx].str,
branch_sample_types[branch_sample_type_idx].str,
clockids[clockid_idx].str, size);
printf(", %d, %d, %d, %s) = %s\n", args[args_idx].pid,
args[args_idx].cpu, args[args_idx].group_fd,
args[args_idx].flags_str, sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_perf_event_open && HAVE_LINUX_PERF_EVENT_H");
#endif

7
tests/perf_event_open.test Executable file
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@ -0,0 +1,7 @@
#!/bin/sh
# Check perf_event_open syscall decoding.
. "${srcdir=.}/init.sh"
run_strace_match_diff -a1

2
tests/perf_event_open_unabbrev.c Normal file
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@ -0,0 +1,2 @@
#define VERBOSE 1
#include "perf_event_open.c"

7
tests/perf_event_open_unabbrev.test Executable file
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@ -0,0 +1,7 @@
#!/bin/sh
# Check perf_event_open syscall decoding.
. "${srcdir=.}/init.sh"
run_strace_match_diff -a1 -v -e trace=perf_event_open