/* * Check verbose decoding of perf_event_open syscall. * * Copyright (c) 2016 Eugene Syromyatnikov * 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 #if defined(__NR_perf_event_open) && defined(HAVE_LINUX_PERF_EVENT_H) # include # include # include # include # include # include # include # include # include # 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