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![Robert Richter](/assets/img/avatar_default.png)
If detection fails and an event name is unknown, report the type number. Example perf header output: # Samples: 10K of event 'unknown attr type: 7' Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1345144224-27280-3-git-send-email-robert.richter@amd.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1002 lines
22 KiB
C
1002 lines
22 KiB
C
/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-{top,stat,record}.c, see those files for further
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* copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include <byteswap.h>
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#include <linux/bitops.h>
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#include "asm/bug.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "util.h"
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#include "cpumap.h"
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#include "thread_map.h"
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#include "target.h"
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#include "../../../include/linux/hw_breakpoint.h"
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#include "../../include/linux/perf_event.h"
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#include "perf_regs.h"
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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static int __perf_evsel__sample_size(u64 sample_type)
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{
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u64 mask = sample_type & PERF_SAMPLE_MASK;
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int size = 0;
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int i;
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for (i = 0; i < 64; i++) {
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if (mask & (1ULL << i))
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size++;
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}
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size *= sizeof(u64);
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return size;
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}
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void hists__init(struct hists *hists)
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{
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memset(hists, 0, sizeof(*hists));
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hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
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hists->entries_in = &hists->entries_in_array[0];
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hists->entries_collapsed = RB_ROOT;
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hists->entries = RB_ROOT;
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pthread_mutex_init(&hists->lock, NULL);
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}
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void perf_evsel__init(struct perf_evsel *evsel,
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struct perf_event_attr *attr, int idx)
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{
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evsel->idx = idx;
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evsel->attr = *attr;
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INIT_LIST_HEAD(&evsel->node);
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hists__init(&evsel->hists);
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evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
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}
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struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
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{
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struct perf_evsel *evsel = zalloc(sizeof(*evsel));
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if (evsel != NULL)
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perf_evsel__init(evsel, attr, idx);
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return evsel;
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}
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static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
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"cycles",
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"instructions",
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"cache-references",
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"cache-misses",
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"branches",
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"branch-misses",
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"bus-cycles",
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"stalled-cycles-frontend",
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"stalled-cycles-backend",
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"ref-cycles",
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};
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static const char *__perf_evsel__hw_name(u64 config)
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{
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if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
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return perf_evsel__hw_names[config];
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return "unknown-hardware";
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}
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static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int colon = 0, r = 0;
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struct perf_event_attr *attr = &evsel->attr;
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bool exclude_guest_default = false;
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#define MOD_PRINT(context, mod) do { \
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if (!attr->exclude_##context) { \
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if (!colon) colon = ++r; \
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r += scnprintf(bf + r, size - r, "%c", mod); \
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} } while(0)
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if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
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MOD_PRINT(kernel, 'k');
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MOD_PRINT(user, 'u');
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MOD_PRINT(hv, 'h');
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exclude_guest_default = true;
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}
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if (attr->precise_ip) {
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if (!colon)
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colon = ++r;
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r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
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exclude_guest_default = true;
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}
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if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
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MOD_PRINT(host, 'H');
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MOD_PRINT(guest, 'G');
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}
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#undef MOD_PRINT
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if (colon)
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bf[colon - 1] = ':';
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return r;
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}
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static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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static const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
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"cpu-clock",
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"task-clock",
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"page-faults",
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"context-switches",
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"CPU-migrations",
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"minor-faults",
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"major-faults",
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"alignment-faults",
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"emulation-faults",
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};
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static const char *__perf_evsel__sw_name(u64 config)
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{
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if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
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return perf_evsel__sw_names[config];
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return "unknown-software";
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}
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static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
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{
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int r;
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r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
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if (type & HW_BREAKPOINT_R)
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r += scnprintf(bf + r, size - r, "r");
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if (type & HW_BREAKPOINT_W)
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r += scnprintf(bf + r, size - r, "w");
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if (type & HW_BREAKPOINT_X)
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r += scnprintf(bf + r, size - r, "x");
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return r;
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}
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static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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struct perf_event_attr *attr = &evsel->attr;
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int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
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return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
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}
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const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "L1-dcache", "l1-d", "l1d", "L1-data", },
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{ "L1-icache", "l1-i", "l1i", "L1-instruction", },
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{ "LLC", "L2", },
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{ "dTLB", "d-tlb", "Data-TLB", },
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{ "iTLB", "i-tlb", "Instruction-TLB", },
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{ "branch", "branches", "bpu", "btb", "bpc", },
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{ "node", },
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};
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const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "load", "loads", "read", },
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{ "store", "stores", "write", },
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{ "prefetch", "prefetches", "speculative-read", "speculative-load", },
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};
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const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
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[PERF_EVSEL__MAX_ALIASES] = {
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{ "refs", "Reference", "ops", "access", },
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{ "misses", "miss", },
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};
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#define C(x) PERF_COUNT_HW_CACHE_##x
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#define CACHE_READ (1 << C(OP_READ))
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#define CACHE_WRITE (1 << C(OP_WRITE))
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#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
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#define COP(x) (1 << x)
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/*
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* cache operartion stat
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* L1I : Read and prefetch only
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* ITLB and BPU : Read-only
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*/
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static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
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[C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
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[C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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[C(ITLB)] = (CACHE_READ),
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[C(BPU)] = (CACHE_READ),
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[C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
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};
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bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
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{
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if (perf_evsel__hw_cache_stat[type] & COP(op))
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return true; /* valid */
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else
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return false; /* invalid */
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}
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int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
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char *bf, size_t size)
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{
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if (result) {
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return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
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perf_evsel__hw_cache_op[op][0],
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perf_evsel__hw_cache_result[result][0]);
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}
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return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
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perf_evsel__hw_cache_op[op][1]);
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}
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static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
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{
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u8 op, result, type = (config >> 0) & 0xff;
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const char *err = "unknown-ext-hardware-cache-type";
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if (type > PERF_COUNT_HW_CACHE_MAX)
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goto out_err;
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op = (config >> 8) & 0xff;
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err = "unknown-ext-hardware-cache-op";
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if (op > PERF_COUNT_HW_CACHE_OP_MAX)
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goto out_err;
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result = (config >> 16) & 0xff;
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err = "unknown-ext-hardware-cache-result";
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if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
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goto out_err;
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err = "invalid-cache";
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if (!perf_evsel__is_cache_op_valid(type, op))
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goto out_err;
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return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
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out_err:
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return scnprintf(bf, size, "%s", err);
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}
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static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
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return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
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}
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static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
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{
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int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
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return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
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}
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const char *perf_evsel__name(struct perf_evsel *evsel)
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{
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char bf[128];
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if (evsel->name)
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return evsel->name;
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switch (evsel->attr.type) {
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case PERF_TYPE_RAW:
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perf_evsel__raw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_HARDWARE:
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perf_evsel__hw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_HW_CACHE:
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perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_SOFTWARE:
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perf_evsel__sw_name(evsel, bf, sizeof(bf));
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break;
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case PERF_TYPE_TRACEPOINT:
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scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
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break;
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case PERF_TYPE_BREAKPOINT:
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perf_evsel__bp_name(evsel, bf, sizeof(bf));
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break;
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default:
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scnprintf(bf, sizeof(bf), "unknown attr type: %d",
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evsel->attr.type);
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break;
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}
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evsel->name = strdup(bf);
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return evsel->name ?: "unknown";
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}
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void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
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struct perf_evsel *first)
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{
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struct perf_event_attr *attr = &evsel->attr;
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int track = !evsel->idx; /* only the first counter needs these */
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attr->disabled = 1;
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attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
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attr->inherit = !opts->no_inherit;
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attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING |
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PERF_FORMAT_ID;
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attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
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/*
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* We default some events to a 1 default interval. But keep
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* it a weak assumption overridable by the user.
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*/
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if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
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opts->user_interval != ULLONG_MAX)) {
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if (opts->freq) {
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attr->sample_type |= PERF_SAMPLE_PERIOD;
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attr->freq = 1;
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attr->sample_freq = opts->freq;
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} else {
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attr->sample_period = opts->default_interval;
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}
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}
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if (opts->no_samples)
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attr->sample_freq = 0;
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if (opts->inherit_stat)
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attr->inherit_stat = 1;
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if (opts->sample_address) {
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attr->sample_type |= PERF_SAMPLE_ADDR;
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attr->mmap_data = track;
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}
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if (opts->call_graph) {
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attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
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if (opts->call_graph == CALLCHAIN_DWARF) {
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attr->sample_type |= PERF_SAMPLE_REGS_USER |
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PERF_SAMPLE_STACK_USER;
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attr->sample_regs_user = PERF_REGS_MASK;
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attr->sample_stack_user = opts->stack_dump_size;
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attr->exclude_callchain_user = 1;
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}
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}
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if (perf_target__has_cpu(&opts->target))
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attr->sample_type |= PERF_SAMPLE_CPU;
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if (opts->period)
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attr->sample_type |= PERF_SAMPLE_PERIOD;
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if (!opts->sample_id_all_missing &&
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(opts->sample_time || !opts->no_inherit ||
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perf_target__has_cpu(&opts->target)))
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attr->sample_type |= PERF_SAMPLE_TIME;
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if (opts->raw_samples) {
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attr->sample_type |= PERF_SAMPLE_TIME;
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attr->sample_type |= PERF_SAMPLE_RAW;
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attr->sample_type |= PERF_SAMPLE_CPU;
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}
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if (opts->no_delay) {
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attr->watermark = 0;
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attr->wakeup_events = 1;
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}
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if (opts->branch_stack) {
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attr->sample_type |= PERF_SAMPLE_BRANCH_STACK;
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attr->branch_sample_type = opts->branch_stack;
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}
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attr->mmap = track;
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attr->comm = track;
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if (perf_target__none(&opts->target) &&
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(!opts->group || evsel == first)) {
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attr->enable_on_exec = 1;
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}
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}
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int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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int cpu, thread;
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evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
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if (evsel->fd) {
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for (cpu = 0; cpu < ncpus; cpu++) {
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for (thread = 0; thread < nthreads; thread++) {
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FD(evsel, cpu, thread) = -1;
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}
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}
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}
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return evsel->fd != NULL ? 0 : -ENOMEM;
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}
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
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if (evsel->sample_id == NULL)
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return -ENOMEM;
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evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
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if (evsel->id == NULL) {
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xyarray__delete(evsel->sample_id);
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evsel->sample_id = NULL;
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return -ENOMEM;
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}
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return 0;
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}
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int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
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{
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evsel->counts = zalloc((sizeof(*evsel->counts) +
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(ncpus * sizeof(struct perf_counts_values))));
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return evsel->counts != NULL ? 0 : -ENOMEM;
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}
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void perf_evsel__free_fd(struct perf_evsel *evsel)
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{
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xyarray__delete(evsel->fd);
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evsel->fd = NULL;
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}
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void perf_evsel__free_id(struct perf_evsel *evsel)
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{
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xyarray__delete(evsel->sample_id);
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evsel->sample_id = NULL;
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free(evsel->id);
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evsel->id = NULL;
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}
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void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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|
int cpu, thread;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++)
|
|
for (thread = 0; thread < nthreads; ++thread) {
|
|
close(FD(evsel, cpu, thread));
|
|
FD(evsel, cpu, thread) = -1;
|
|
}
|
|
}
|
|
|
|
void perf_evsel__exit(struct perf_evsel *evsel)
|
|
{
|
|
assert(list_empty(&evsel->node));
|
|
xyarray__delete(evsel->fd);
|
|
xyarray__delete(evsel->sample_id);
|
|
free(evsel->id);
|
|
}
|
|
|
|
void perf_evsel__delete(struct perf_evsel *evsel)
|
|
{
|
|
perf_evsel__exit(evsel);
|
|
close_cgroup(evsel->cgrp);
|
|
free(evsel->group_name);
|
|
free(evsel->name);
|
|
free(evsel);
|
|
}
|
|
|
|
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
|
|
int cpu, int thread, bool scale)
|
|
{
|
|
struct perf_counts_values count;
|
|
size_t nv = scale ? 3 : 1;
|
|
|
|
if (FD(evsel, cpu, thread) < 0)
|
|
return -EINVAL;
|
|
|
|
if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
|
|
return -errno;
|
|
|
|
if (scale) {
|
|
if (count.run == 0)
|
|
count.val = 0;
|
|
else if (count.run < count.ena)
|
|
count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
|
|
} else
|
|
count.ena = count.run = 0;
|
|
|
|
evsel->counts->cpu[cpu] = count;
|
|
return 0;
|
|
}
|
|
|
|
int __perf_evsel__read(struct perf_evsel *evsel,
|
|
int ncpus, int nthreads, bool scale)
|
|
{
|
|
size_t nv = scale ? 3 : 1;
|
|
int cpu, thread;
|
|
struct perf_counts_values *aggr = &evsel->counts->aggr, count;
|
|
|
|
aggr->val = aggr->ena = aggr->run = 0;
|
|
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
if (FD(evsel, cpu, thread) < 0)
|
|
continue;
|
|
|
|
if (readn(FD(evsel, cpu, thread),
|
|
&count, nv * sizeof(u64)) < 0)
|
|
return -errno;
|
|
|
|
aggr->val += count.val;
|
|
if (scale) {
|
|
aggr->ena += count.ena;
|
|
aggr->run += count.run;
|
|
}
|
|
}
|
|
}
|
|
|
|
evsel->counts->scaled = 0;
|
|
if (scale) {
|
|
if (aggr->run == 0) {
|
|
evsel->counts->scaled = -1;
|
|
aggr->val = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (aggr->run < aggr->ena) {
|
|
evsel->counts->scaled = 1;
|
|
aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
|
|
}
|
|
} else
|
|
aggr->ena = aggr->run = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
|
|
{
|
|
struct perf_evsel *leader = evsel->leader;
|
|
int fd;
|
|
|
|
if (!leader)
|
|
return -1;
|
|
|
|
/*
|
|
* Leader must be already processed/open,
|
|
* if not it's a bug.
|
|
*/
|
|
BUG_ON(!leader->fd);
|
|
|
|
fd = FD(leader, cpu, thread);
|
|
BUG_ON(fd == -1);
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
int cpu, thread;
|
|
unsigned long flags = 0;
|
|
int pid = -1, err;
|
|
|
|
if (evsel->fd == NULL &&
|
|
perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (evsel->cgrp) {
|
|
flags = PERF_FLAG_PID_CGROUP;
|
|
pid = evsel->cgrp->fd;
|
|
}
|
|
|
|
for (cpu = 0; cpu < cpus->nr; cpu++) {
|
|
|
|
for (thread = 0; thread < threads->nr; thread++) {
|
|
int group_fd;
|
|
|
|
if (!evsel->cgrp)
|
|
pid = threads->map[thread];
|
|
|
|
group_fd = get_group_fd(evsel, cpu, thread);
|
|
|
|
FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
|
|
pid,
|
|
cpus->map[cpu],
|
|
group_fd, flags);
|
|
if (FD(evsel, cpu, thread) < 0) {
|
|
err = -errno;
|
|
goto out_close;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_close:
|
|
do {
|
|
while (--thread >= 0) {
|
|
close(FD(evsel, cpu, thread));
|
|
FD(evsel, cpu, thread) = -1;
|
|
}
|
|
thread = threads->nr;
|
|
} while (--cpu >= 0);
|
|
return err;
|
|
}
|
|
|
|
void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
|
|
{
|
|
if (evsel->fd == NULL)
|
|
return;
|
|
|
|
perf_evsel__close_fd(evsel, ncpus, nthreads);
|
|
perf_evsel__free_fd(evsel);
|
|
evsel->fd = NULL;
|
|
}
|
|
|
|
static struct {
|
|
struct cpu_map map;
|
|
int cpus[1];
|
|
} empty_cpu_map = {
|
|
.map.nr = 1,
|
|
.cpus = { -1, },
|
|
};
|
|
|
|
static struct {
|
|
struct thread_map map;
|
|
int threads[1];
|
|
} empty_thread_map = {
|
|
.map.nr = 1,
|
|
.threads = { -1, },
|
|
};
|
|
|
|
int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
if (cpus == NULL) {
|
|
/* Work around old compiler warnings about strict aliasing */
|
|
cpus = &empty_cpu_map.map;
|
|
}
|
|
|
|
if (threads == NULL)
|
|
threads = &empty_thread_map.map;
|
|
|
|
return __perf_evsel__open(evsel, cpus, threads);
|
|
}
|
|
|
|
int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
|
|
struct cpu_map *cpus)
|
|
{
|
|
return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
|
|
}
|
|
|
|
int perf_evsel__open_per_thread(struct perf_evsel *evsel,
|
|
struct thread_map *threads)
|
|
{
|
|
return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
|
|
}
|
|
|
|
static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
|
|
struct perf_sample *sample,
|
|
bool swapped)
|
|
{
|
|
const u64 *array = event->sample.array;
|
|
union u64_swap u;
|
|
|
|
array += ((event->header.size -
|
|
sizeof(event->header)) / sizeof(u64)) - 1;
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
}
|
|
|
|
sample->cpu = u.val32[0];
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
sample->stream_id = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
sample->id = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
sample->time = *array;
|
|
array--;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
|
|
sample->pid = u.val32[0];
|
|
sample->tid = u.val32[1];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool sample_overlap(const union perf_event *event,
|
|
const void *offset, u64 size)
|
|
{
|
|
const void *base = event;
|
|
|
|
if (offset + size > base + event->header.size)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
|
|
struct perf_sample *data, bool swapped)
|
|
{
|
|
u64 type = evsel->attr.sample_type;
|
|
u64 regs_user = evsel->attr.sample_regs_user;
|
|
const u64 *array;
|
|
|
|
/*
|
|
* used for cross-endian analysis. See git commit 65014ab3
|
|
* for why this goofiness is needed.
|
|
*/
|
|
union u64_swap u;
|
|
|
|
memset(data, 0, sizeof(*data));
|
|
data->cpu = data->pid = data->tid = -1;
|
|
data->stream_id = data->id = data->time = -1ULL;
|
|
data->period = 1;
|
|
|
|
if (event->header.type != PERF_RECORD_SAMPLE) {
|
|
if (!evsel->attr.sample_id_all)
|
|
return 0;
|
|
return perf_event__parse_id_sample(event, type, data, swapped);
|
|
}
|
|
|
|
array = event->sample.array;
|
|
|
|
if (evsel->sample_size + sizeof(event->header) > event->header.size)
|
|
return -EFAULT;
|
|
|
|
if (type & PERF_SAMPLE_IP) {
|
|
data->ip = event->ip.ip;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
|
|
data->pid = u.val32[0];
|
|
data->tid = u.val32[1];
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
data->time = *array;
|
|
array++;
|
|
}
|
|
|
|
data->addr = 0;
|
|
if (type & PERF_SAMPLE_ADDR) {
|
|
data->addr = *array;
|
|
array++;
|
|
}
|
|
|
|
data->id = -1ULL;
|
|
if (type & PERF_SAMPLE_ID) {
|
|
data->id = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
data->stream_id = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
|
|
u.val64 = *array;
|
|
if (swapped) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
}
|
|
|
|
data->cpu = u.val32[0];
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PERIOD) {
|
|
data->period = *array;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_READ) {
|
|
fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
|
|
return -1;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) {
|
|
if (sample_overlap(event, array, sizeof(data->callchain->nr)))
|
|
return -EFAULT;
|
|
|
|
data->callchain = (struct ip_callchain *)array;
|
|
|
|
if (sample_overlap(event, array, data->callchain->nr))
|
|
return -EFAULT;
|
|
|
|
array += 1 + data->callchain->nr;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_RAW) {
|
|
const u64 *pdata;
|
|
|
|
u.val64 = *array;
|
|
if (WARN_ONCE(swapped,
|
|
"Endianness of raw data not corrected!\n")) {
|
|
/* undo swap of u64, then swap on individual u32s */
|
|
u.val64 = bswap_64(u.val64);
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
}
|
|
|
|
if (sample_overlap(event, array, sizeof(u32)))
|
|
return -EFAULT;
|
|
|
|
data->raw_size = u.val32[0];
|
|
pdata = (void *) array + sizeof(u32);
|
|
|
|
if (sample_overlap(event, pdata, data->raw_size))
|
|
return -EFAULT;
|
|
|
|
data->raw_data = (void *) pdata;
|
|
|
|
array = (void *)array + data->raw_size + sizeof(u32);
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) {
|
|
u64 sz;
|
|
|
|
data->branch_stack = (struct branch_stack *)array;
|
|
array++; /* nr */
|
|
|
|
sz = data->branch_stack->nr * sizeof(struct branch_entry);
|
|
sz /= sizeof(u64);
|
|
array += sz;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_REGS_USER) {
|
|
/* First u64 tells us if we have any regs in sample. */
|
|
u64 avail = *array++;
|
|
|
|
if (avail) {
|
|
data->user_regs.regs = (u64 *)array;
|
|
array += hweight_long(regs_user);
|
|
}
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STACK_USER) {
|
|
u64 size = *array++;
|
|
|
|
data->user_stack.offset = ((char *)(array - 1)
|
|
- (char *) event);
|
|
|
|
if (!size) {
|
|
data->user_stack.size = 0;
|
|
} else {
|
|
data->user_stack.data = (char *)array;
|
|
array += size / sizeof(*array);
|
|
data->user_stack.size = *array;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_sample(union perf_event *event, u64 type,
|
|
const struct perf_sample *sample,
|
|
bool swapped)
|
|
{
|
|
u64 *array;
|
|
|
|
/*
|
|
* used for cross-endian analysis. See git commit 65014ab3
|
|
* for why this goofiness is needed.
|
|
*/
|
|
union u64_swap u;
|
|
|
|
array = event->sample.array;
|
|
|
|
if (type & PERF_SAMPLE_IP) {
|
|
event->ip.ip = sample->ip;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TID) {
|
|
u.val32[0] = sample->pid;
|
|
u.val32[1] = sample->tid;
|
|
if (swapped) {
|
|
/*
|
|
* Inverse of what is done in perf_evsel__parse_sample
|
|
*/
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val32[1] = bswap_32(u.val32[1]);
|
|
u.val64 = bswap_64(u.val64);
|
|
}
|
|
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_TIME) {
|
|
*array = sample->time;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ADDR) {
|
|
*array = sample->addr;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_ID) {
|
|
*array = sample->id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) {
|
|
*array = sample->stream_id;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_CPU) {
|
|
u.val32[0] = sample->cpu;
|
|
if (swapped) {
|
|
/*
|
|
* Inverse of what is done in perf_evsel__parse_sample
|
|
*/
|
|
u.val32[0] = bswap_32(u.val32[0]);
|
|
u.val64 = bswap_64(u.val64);
|
|
}
|
|
*array = u.val64;
|
|
array++;
|
|
}
|
|
|
|
if (type & PERF_SAMPLE_PERIOD) {
|
|
*array = sample->period;
|
|
array++;
|
|
}
|
|
|
|
return 0;
|
|
}
|