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-rw-r--r--tools/perf/util/db-export.c609
1 files changed, 609 insertions, 0 deletions
diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
new file mode 100644
index 000000000..e0d4f0883
--- /dev/null
+++ b/tools/perf/util/db-export.c
@@ -0,0 +1,609 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * db-export.c: Support for exporting data suitable for import to a database
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "dso.h"
+#include "evsel.h"
+#include "machine.h"
+#include "thread.h"
+#include "comm.h"
+#include "symbol.h"
+#include "map.h"
+#include "event.h"
+#include "thread-stack.h"
+#include "callchain.h"
+#include "call-path.h"
+#include "db-export.h"
+#include <linux/zalloc.h>
+
+int db_export__init(struct db_export *dbe)
+{
+ memset(dbe, 0, sizeof(struct db_export));
+ return 0;
+}
+
+void db_export__exit(struct db_export *dbe)
+{
+ call_return_processor__free(dbe->crp);
+ dbe->crp = NULL;
+}
+
+int db_export__evsel(struct db_export *dbe, struct evsel *evsel)
+{
+ if (evsel->db_id)
+ return 0;
+
+ evsel->db_id = ++dbe->evsel_last_db_id;
+
+ if (dbe->export_evsel)
+ return dbe->export_evsel(dbe, evsel);
+
+ return 0;
+}
+
+int db_export__machine(struct db_export *dbe, struct machine *machine)
+{
+ if (machine->db_id)
+ return 0;
+
+ machine->db_id = ++dbe->machine_last_db_id;
+
+ if (dbe->export_machine)
+ return dbe->export_machine(dbe, machine);
+
+ return 0;
+}
+
+int db_export__thread(struct db_export *dbe, struct thread *thread,
+ struct machine *machine, struct thread *main_thread)
+{
+ u64 main_thread_db_id = 0;
+
+ if (thread->db_id)
+ return 0;
+
+ thread->db_id = ++dbe->thread_last_db_id;
+
+ if (main_thread)
+ main_thread_db_id = main_thread->db_id;
+
+ if (dbe->export_thread)
+ return dbe->export_thread(dbe, thread, main_thread_db_id,
+ machine);
+
+ return 0;
+}
+
+static int __db_export__comm(struct db_export *dbe, struct comm *comm,
+ struct thread *thread)
+{
+ comm->db_id = ++dbe->comm_last_db_id;
+
+ if (dbe->export_comm)
+ return dbe->export_comm(dbe, comm, thread);
+
+ return 0;
+}
+
+int db_export__comm(struct db_export *dbe, struct comm *comm,
+ struct thread *thread)
+{
+ if (comm->db_id)
+ return 0;
+
+ return __db_export__comm(dbe, comm, thread);
+}
+
+/*
+ * Export the "exec" comm. The "exec" comm is the program / application command
+ * name at the time it first executes. It is used to group threads for the same
+ * program. Note that the main thread pid (or thread group id tgid) cannot be
+ * used because it does not change when a new program is exec'ed.
+ */
+int db_export__exec_comm(struct db_export *dbe, struct comm *comm,
+ struct thread *main_thread)
+{
+ int err;
+
+ if (comm->db_id)
+ return 0;
+
+ err = __db_export__comm(dbe, comm, main_thread);
+ if (err)
+ return err;
+
+ /*
+ * Record the main thread for this comm. Note that the main thread can
+ * have many "exec" comms because there will be a new one every time it
+ * exec's. An "exec" comm however will only ever have 1 main thread.
+ * That is different to any other threads for that same program because
+ * exec() will effectively kill them, so the relationship between the
+ * "exec" comm and non-main threads is 1-to-1. That is why
+ * db_export__comm_thread() is called here for the main thread, but it
+ * is called for non-main threads when they are exported.
+ */
+ return db_export__comm_thread(dbe, comm, main_thread);
+}
+
+int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
+ struct thread *thread)
+{
+ u64 db_id;
+
+ db_id = ++dbe->comm_thread_last_db_id;
+
+ if (dbe->export_comm_thread)
+ return dbe->export_comm_thread(dbe, db_id, comm, thread);
+
+ return 0;
+}
+
+int db_export__dso(struct db_export *dbe, struct dso *dso,
+ struct machine *machine)
+{
+ if (dso->db_id)
+ return 0;
+
+ dso->db_id = ++dbe->dso_last_db_id;
+
+ if (dbe->export_dso)
+ return dbe->export_dso(dbe, dso, machine);
+
+ return 0;
+}
+
+int db_export__symbol(struct db_export *dbe, struct symbol *sym,
+ struct dso *dso)
+{
+ u64 *sym_db_id = symbol__priv(sym);
+
+ if (*sym_db_id)
+ return 0;
+
+ *sym_db_id = ++dbe->symbol_last_db_id;
+
+ if (dbe->export_symbol)
+ return dbe->export_symbol(dbe, sym, dso);
+
+ return 0;
+}
+
+static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
+ u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
+{
+ int err;
+
+ if (al->map) {
+ struct dso *dso = al->map->dso;
+
+ err = db_export__dso(dbe, dso, al->maps->machine);
+ if (err)
+ return err;
+ *dso_db_id = dso->db_id;
+
+ if (!al->sym) {
+ al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
+ if (al->sym)
+ dso__insert_symbol(dso, al->sym);
+ }
+
+ if (al->sym) {
+ u64 *db_id = symbol__priv(al->sym);
+
+ err = db_export__symbol(dbe, al->sym, dso);
+ if (err)
+ return err;
+ *sym_db_id = *db_id;
+ *offset = al->addr - al->sym->start;
+ }
+ }
+
+ return 0;
+}
+
+static struct call_path *call_path_from_sample(struct db_export *dbe,
+ struct machine *machine,
+ struct thread *thread,
+ struct perf_sample *sample,
+ struct evsel *evsel)
+{
+ u64 kernel_start = machine__kernel_start(machine);
+ struct call_path *current = &dbe->cpr->call_path;
+ enum chain_order saved_order = callchain_param.order;
+ int err;
+
+ if (!symbol_conf.use_callchain || !sample->callchain)
+ return NULL;
+
+ /*
+ * Since the call path tree must be built starting with the root, we
+ * must use ORDER_CALL for call chain resolution, in order to process
+ * the callchain starting with the root node and ending with the leaf.
+ */
+ callchain_param.order = ORDER_CALLER;
+ err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
+ sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
+ if (err) {
+ callchain_param.order = saved_order;
+ return NULL;
+ }
+ callchain_cursor_commit(&callchain_cursor);
+
+ while (1) {
+ struct callchain_cursor_node *node;
+ struct addr_location al;
+ u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
+
+ memset(&al, 0, sizeof(al));
+
+ node = callchain_cursor_current(&callchain_cursor);
+ if (!node)
+ break;
+ /*
+ * Handle export of symbol and dso for this node by
+ * constructing an addr_location struct and then passing it to
+ * db_ids_from_al() to perform the export.
+ */
+ al.sym = node->ms.sym;
+ al.map = node->ms.map;
+ al.maps = thread->maps;
+ al.addr = node->ip;
+
+ if (al.map && !al.sym)
+ al.sym = dso__find_symbol(al.map->dso, al.addr);
+
+ db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
+
+ /* add node to the call path tree if it doesn't exist */
+ current = call_path__findnew(dbe->cpr, current,
+ al.sym, node->ip,
+ kernel_start);
+
+ callchain_cursor_advance(&callchain_cursor);
+ }
+
+ /* Reset the callchain order to its prior value. */
+ callchain_param.order = saved_order;
+
+ if (current == &dbe->cpr->call_path) {
+ /* Bail because the callchain was empty. */
+ return NULL;
+ }
+
+ return current;
+}
+
+int db_export__branch_type(struct db_export *dbe, u32 branch_type,
+ const char *name)
+{
+ if (dbe->export_branch_type)
+ return dbe->export_branch_type(dbe, branch_type, name);
+
+ return 0;
+}
+
+static int db_export__threads(struct db_export *dbe, struct thread *thread,
+ struct thread *main_thread,
+ struct machine *machine, struct comm **comm_ptr)
+{
+ struct comm *comm = NULL;
+ struct comm *curr_comm;
+ int err;
+
+ if (main_thread) {
+ /*
+ * A thread has a reference to the main thread, so export the
+ * main thread first.
+ */
+ err = db_export__thread(dbe, main_thread, machine, main_thread);
+ if (err)
+ return err;
+ /*
+ * Export comm before exporting the non-main thread because
+ * db_export__comm_thread() can be called further below.
+ */
+ comm = machine__thread_exec_comm(machine, main_thread);
+ if (comm) {
+ err = db_export__exec_comm(dbe, comm, main_thread);
+ if (err)
+ return err;
+ *comm_ptr = comm;
+ }
+ }
+
+ if (thread != main_thread) {
+ /*
+ * For a non-main thread, db_export__comm_thread() must be
+ * called only if thread has not previously been exported.
+ */
+ bool export_comm_thread = comm && !thread->db_id;
+
+ err = db_export__thread(dbe, thread, machine, main_thread);
+ if (err)
+ return err;
+
+ if (export_comm_thread) {
+ err = db_export__comm_thread(dbe, comm, thread);
+ if (err)
+ return err;
+ }
+ }
+
+ curr_comm = thread__comm(thread);
+ if (curr_comm)
+ return db_export__comm(dbe, curr_comm, thread);
+
+ return 0;
+}
+
+int db_export__sample(struct db_export *dbe, union perf_event *event,
+ struct perf_sample *sample, struct evsel *evsel,
+ struct addr_location *al, struct addr_location *addr_al)
+{
+ struct thread *thread = al->thread;
+ struct export_sample es = {
+ .event = event,
+ .sample = sample,
+ .evsel = evsel,
+ .al = al,
+ };
+ struct thread *main_thread;
+ struct comm *comm = NULL;
+ int err;
+
+ err = db_export__evsel(dbe, evsel);
+ if (err)
+ return err;
+
+ err = db_export__machine(dbe, al->maps->machine);
+ if (err)
+ return err;
+
+ main_thread = thread__main_thread(al->maps->machine, thread);
+
+ err = db_export__threads(dbe, thread, main_thread, al->maps->machine, &comm);
+ if (err)
+ goto out_put;
+
+ if (comm)
+ es.comm_db_id = comm->db_id;
+
+ es.db_id = ++dbe->sample_last_db_id;
+
+ err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
+ if (err)
+ goto out_put;
+
+ if (dbe->cpr) {
+ struct call_path *cp = call_path_from_sample(dbe, al->maps->machine,
+ thread, sample,
+ evsel);
+ if (cp) {
+ db_export__call_path(dbe, cp);
+ es.call_path_id = cp->db_id;
+ }
+ }
+
+ if (addr_al) {
+ err = db_ids_from_al(dbe, addr_al, &es.addr_dso_db_id,
+ &es.addr_sym_db_id, &es.addr_offset);
+ if (err)
+ goto out_put;
+ if (dbe->crp) {
+ err = thread_stack__process(thread, comm, sample, al,
+ addr_al, es.db_id,
+ dbe->crp);
+ if (err)
+ goto out_put;
+ }
+ }
+
+ if (dbe->export_sample)
+ err = dbe->export_sample(dbe, &es);
+
+out_put:
+ thread__put(main_thread);
+ return err;
+}
+
+static struct {
+ u32 branch_type;
+ const char *name;
+} branch_types[] = {
+ {0, "no branch"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
+ {PERF_IP_FLAG_BRANCH, "unconditional jump"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
+ "software interrupt"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
+ "return from interrupt"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
+ "system call"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
+ "return from system call"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
+ PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMENTRY, "vm entry"},
+ {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMEXIT, "vm exit"},
+ {0, NULL}
+};
+
+int db_export__branch_types(struct db_export *dbe)
+{
+ int i, err = 0;
+
+ for (i = 0; branch_types[i].name ; i++) {
+ err = db_export__branch_type(dbe, branch_types[i].branch_type,
+ branch_types[i].name);
+ if (err)
+ break;
+ }
+
+ /* Add trace begin / end variants */
+ for (i = 0; branch_types[i].name ; i++) {
+ const char *name = branch_types[i].name;
+ u32 type = branch_types[i].branch_type;
+ char buf[64];
+
+ if (type == PERF_IP_FLAG_BRANCH ||
+ (type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END)))
+ continue;
+
+ snprintf(buf, sizeof(buf), "trace begin / %s", name);
+ err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf);
+ if (err)
+ break;
+
+ snprintf(buf, sizeof(buf), "%s / trace end", name);
+ err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+int db_export__call_path(struct db_export *dbe, struct call_path *cp)
+{
+ int err;
+
+ if (cp->db_id)
+ return 0;
+
+ if (cp->parent) {
+ err = db_export__call_path(dbe, cp->parent);
+ if (err)
+ return err;
+ }
+
+ cp->db_id = ++dbe->call_path_last_db_id;
+
+ if (dbe->export_call_path)
+ return dbe->export_call_path(dbe, cp);
+
+ return 0;
+}
+
+int db_export__call_return(struct db_export *dbe, struct call_return *cr,
+ u64 *parent_db_id)
+{
+ int err;
+
+ err = db_export__call_path(dbe, cr->cp);
+ if (err)
+ return err;
+
+ if (!cr->db_id)
+ cr->db_id = ++dbe->call_return_last_db_id;
+
+ if (parent_db_id) {
+ if (!*parent_db_id)
+ *parent_db_id = ++dbe->call_return_last_db_id;
+ cr->parent_db_id = *parent_db_id;
+ }
+
+ if (dbe->export_call_return)
+ return dbe->export_call_return(dbe, cr);
+
+ return 0;
+}
+
+static int db_export__pid_tid(struct db_export *dbe, struct machine *machine,
+ pid_t pid, pid_t tid, u64 *db_id,
+ struct comm **comm_ptr, bool *is_idle)
+{
+ struct thread *thread = machine__find_thread(machine, pid, tid);
+ struct thread *main_thread;
+ int err = 0;
+
+ if (!thread || !thread->comm_set)
+ goto out_put;
+
+ *is_idle = !thread->pid_ && !thread->tid;
+
+ main_thread = thread__main_thread(machine, thread);
+
+ err = db_export__threads(dbe, thread, main_thread, machine, comm_ptr);
+
+ *db_id = thread->db_id;
+
+ thread__put(main_thread);
+out_put:
+ thread__put(thread);
+
+ return err;
+}
+
+int db_export__switch(struct db_export *dbe, union perf_event *event,
+ struct perf_sample *sample, struct machine *machine)
+{
+ bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
+ bool out_preempt = out &&
+ (event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT);
+ int flags = out | (out_preempt << 1);
+ bool is_idle_a = false, is_idle_b = false;
+ u64 th_a_id = 0, th_b_id = 0;
+ u64 comm_out_id, comm_in_id;
+ struct comm *comm_a = NULL;
+ struct comm *comm_b = NULL;
+ u64 th_out_id, th_in_id;
+ u64 db_id;
+ int err;
+
+ err = db_export__machine(dbe, machine);
+ if (err)
+ return err;
+
+ err = db_export__pid_tid(dbe, machine, sample->pid, sample->tid,
+ &th_a_id, &comm_a, &is_idle_a);
+ if (err)
+ return err;
+
+ if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
+ pid_t pid = event->context_switch.next_prev_pid;
+ pid_t tid = event->context_switch.next_prev_tid;
+
+ err = db_export__pid_tid(dbe, machine, pid, tid, &th_b_id,
+ &comm_b, &is_idle_b);
+ if (err)
+ return err;
+ }
+
+ /*
+ * Do not export if both threads are unknown (i.e. not being traced),
+ * or one is unknown and the other is the idle task.
+ */
+ if ((!th_a_id || is_idle_a) && (!th_b_id || is_idle_b))
+ return 0;
+
+ db_id = ++dbe->context_switch_last_db_id;
+
+ if (out) {
+ th_out_id = th_a_id;
+ th_in_id = th_b_id;
+ comm_out_id = comm_a ? comm_a->db_id : 0;
+ comm_in_id = comm_b ? comm_b->db_id : 0;
+ } else {
+ th_out_id = th_b_id;
+ th_in_id = th_a_id;
+ comm_out_id = comm_b ? comm_b->db_id : 0;
+ comm_in_id = comm_a ? comm_a->db_id : 0;
+ }
+
+ if (dbe->export_context_switch)
+ return dbe->export_context_switch(dbe, db_id, machine, sample,
+ th_out_id, comm_out_id,
+ th_in_id, comm_in_id, flags);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 10:02:18 +0000