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1a97cee604
struct maps is reference counted, using a pointer is more idiomatic.
Committer notes:
Delay:
maps = machine__kernel_maps(&vmlinux);
To after:
machine__init(&vmlinux, "", HOST_KERNEL_ID);
To avoid this on f34:
In file included from /var/home/acme/git/perf/tools/perf/util/build-id.h:10,
from /var/home/acme/git/perf/tools/perf/util/dso.h:13,
from tests/vmlinux-kallsyms.c:8:
In function ‘machine__kernel_maps’,
inlined from ‘test__vmlinux_matches_kallsyms’ at tests/vmlinux-kallsyms.c:122:22:
/var/home/acme/git/perf/tools/perf/util/machine.h:86:23: error: ‘vmlinux.kmaps’ is used uninitialized [-Werror=uninitialized]
86 | return machine->kmaps;
| ~~~~~~~^~~~~~~
tests/vmlinux-kallsyms.c: In function ‘test__vmlinux_matches_kallsyms’:
tests/vmlinux-kallsyms.c:121:34: note: ‘vmlinux’ declared here
121 | struct machine kallsyms, vmlinux;
| ^~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: André Almeida <andrealmeid@collabora.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Hao Luo <haoluo@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: http://lore.kernel.org/lkml/20220211103415.2737789-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
299 lines
9.6 KiB
C
299 lines
9.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_MACHINE_H
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#define __PERF_MACHINE_H
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#include <sys/types.h>
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#include <linux/rbtree.h>
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#include "maps.h"
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#include "dsos.h"
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#include "rwsem.h"
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struct addr_location;
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struct branch_stack;
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struct dso;
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struct dso_id;
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struct evsel;
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struct perf_sample;
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struct symbol;
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struct target;
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struct thread;
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union perf_event;
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/* Native host kernel uses -1 as pid index in machine */
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#define HOST_KERNEL_ID (-1)
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#define DEFAULT_GUEST_KERNEL_ID (0)
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extern const char *ref_reloc_sym_names[];
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struct vdso_info;
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#define THREADS__TABLE_BITS 8
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#define THREADS__TABLE_SIZE (1 << THREADS__TABLE_BITS)
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struct threads {
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struct rb_root_cached entries;
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struct rw_semaphore lock;
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unsigned int nr;
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struct list_head dead;
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struct thread *last_match;
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};
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struct machine {
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struct rb_node rb_node;
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pid_t pid;
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u16 id_hdr_size;
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bool comm_exec;
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bool kptr_restrict_warned;
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bool single_address_space;
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char *root_dir;
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char *mmap_name;
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struct threads threads[THREADS__TABLE_SIZE];
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struct vdso_info *vdso_info;
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struct perf_env *env;
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struct dsos dsos;
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struct maps *kmaps;
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struct map *vmlinux_map;
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u64 kernel_start;
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pid_t *current_tid;
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union { /* Tool specific area */
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void *priv;
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u64 db_id;
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};
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bool trampolines_mapped;
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};
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static inline struct threads *machine__threads(struct machine *machine, pid_t tid)
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{
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/* Cast it to handle tid == -1 */
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return &machine->threads[(unsigned int)tid % THREADS__TABLE_SIZE];
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}
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/*
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* The main kernel (vmlinux) map
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*/
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static inline
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struct map *machine__kernel_map(struct machine *machine)
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{
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return machine->vmlinux_map;
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}
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/*
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* kernel (the one returned by machine__kernel_map()) plus kernel modules maps
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*/
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static inline
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struct maps *machine__kernel_maps(struct machine *machine)
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{
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return machine->kmaps;
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}
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int machine__get_kernel_start(struct machine *machine);
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static inline u64 machine__kernel_start(struct machine *machine)
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{
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if (!machine->kernel_start)
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machine__get_kernel_start(machine);
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return machine->kernel_start;
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}
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static inline bool machine__kernel_ip(struct machine *machine, u64 ip)
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{
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u64 kernel_start = machine__kernel_start(machine);
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return ip >= kernel_start;
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}
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u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr);
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struct thread *machine__find_thread(struct machine *machine, pid_t pid,
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pid_t tid);
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struct thread *machine__idle_thread(struct machine *machine);
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struct comm *machine__thread_exec_comm(struct machine *machine,
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struct thread *thread);
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int machine__process_comm_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_exit_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_fork_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_lost_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_lost_samples_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_aux_event(struct machine *machine,
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union perf_event *event);
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int machine__process_itrace_start_event(struct machine *machine,
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union perf_event *event);
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int machine__process_aux_output_hw_id_event(struct machine *machine,
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union perf_event *event);
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int machine__process_switch_event(struct machine *machine,
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union perf_event *event);
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int machine__process_namespaces_event(struct machine *machine,
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union perf_event *event,
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struct perf_sample *sample);
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int machine__process_cgroup_event(struct machine *machine,
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union perf_event *event,
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struct perf_sample *sample);
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int machine__process_mmap_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_mmap2_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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int machine__process_ksymbol(struct machine *machine,
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union perf_event *event,
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struct perf_sample *sample);
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int machine__process_text_poke(struct machine *machine,
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union perf_event *event,
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struct perf_sample *sample);
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int machine__process_event(struct machine *machine, union perf_event *event,
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struct perf_sample *sample);
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typedef void (*machine__process_t)(struct machine *machine, void *data);
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struct machines {
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struct machine host;
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struct rb_root_cached guests;
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};
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void machines__init(struct machines *machines);
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void machines__exit(struct machines *machines);
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void machines__process_guests(struct machines *machines,
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machine__process_t process, void *data);
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struct machine *machines__add(struct machines *machines, pid_t pid,
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const char *root_dir);
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struct machine *machines__find_host(struct machines *machines);
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struct machine *machines__find(struct machines *machines, pid_t pid);
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struct machine *machines__findnew(struct machines *machines, pid_t pid);
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struct machine *machines__find_guest(struct machines *machines, pid_t pid);
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void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size);
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void machines__set_comm_exec(struct machines *machines, bool comm_exec);
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struct machine *machine__new_host(void);
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struct machine *machine__new_kallsyms(void);
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int machine__init(struct machine *machine, const char *root_dir, pid_t pid);
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void machine__exit(struct machine *machine);
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void machine__delete_threads(struct machine *machine);
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void machine__delete(struct machine *machine);
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void machine__remove_thread(struct machine *machine, struct thread *th);
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struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
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struct addr_location *al);
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struct mem_info *sample__resolve_mem(struct perf_sample *sample,
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struct addr_location *al);
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struct callchain_cursor;
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int thread__resolve_callchain(struct thread *thread,
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struct callchain_cursor *cursor,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct symbol **parent,
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struct addr_location *root_al,
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int max_stack);
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/*
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* Default guest kernel is defined by parameter --guestkallsyms
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* and --guestmodules
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*/
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static inline bool machine__is_default_guest(struct machine *machine)
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{
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return machine ? machine->pid == DEFAULT_GUEST_KERNEL_ID : false;
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}
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static inline bool machine__is_host(struct machine *machine)
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{
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return machine ? machine->pid == HOST_KERNEL_ID : false;
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}
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bool machine__is(struct machine *machine, const char *arch);
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bool machine__normalized_is(struct machine *machine, const char *arch);
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int machine__nr_cpus_avail(struct machine *machine);
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struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
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struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
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struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id);
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struct dso *machine__findnew_dso(struct machine *machine, const char *filename);
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size_t machine__fprintf(struct machine *machine, FILE *fp);
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static inline
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struct symbol *machine__find_kernel_symbol(struct machine *machine, u64 addr,
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struct map **mapp)
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{
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return maps__find_symbol(machine->kmaps, addr, mapp);
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}
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static inline
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struct symbol *machine__find_kernel_symbol_by_name(struct machine *machine,
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const char *name,
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struct map **mapp)
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{
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return maps__find_symbol_by_name(machine->kmaps, name, mapp);
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}
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int arch__fix_module_text_start(u64 *start, u64 *size, const char *name);
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int machine__load_kallsyms(struct machine *machine, const char *filename);
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int machine__load_vmlinux_path(struct machine *machine);
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size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
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bool (skip)(struct dso *dso, int parm), int parm);
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size_t machines__fprintf_dsos(struct machines *machines, FILE *fp);
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size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
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bool (skip)(struct dso *dso, int parm), int parm);
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void machine__destroy_kernel_maps(struct machine *machine);
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int machine__create_kernel_maps(struct machine *machine);
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int machines__create_kernel_maps(struct machines *machines, pid_t pid);
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int machines__create_guest_kernel_maps(struct machines *machines);
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void machines__destroy_kernel_maps(struct machines *machines);
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size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);
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typedef int (*machine__dso_t)(struct dso *dso, struct machine *machine, void *priv);
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int machine__for_each_dso(struct machine *machine, machine__dso_t fn,
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void *priv);
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int machine__for_each_thread(struct machine *machine,
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int (*fn)(struct thread *thread, void *p),
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void *priv);
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int machines__for_each_thread(struct machines *machines,
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int (*fn)(struct thread *thread, void *p),
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void *priv);
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pid_t machine__get_current_tid(struct machine *machine, int cpu);
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int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
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pid_t tid);
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/*
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* For use with libtraceevent's tep_set_function_resolver()
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*/
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char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp);
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void machine__get_kallsyms_filename(struct machine *machine, char *buf,
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size_t bufsz);
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int machine__create_extra_kernel_maps(struct machine *machine,
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struct dso *kernel);
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/* Kernel-space maps for symbols that are outside the main kernel map and module maps */
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struct extra_kernel_map {
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u64 start;
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u64 end;
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u64 pgoff;
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char name[KMAP_NAME_LEN];
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};
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int machine__create_extra_kernel_map(struct machine *machine,
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struct dso *kernel,
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struct extra_kernel_map *xm);
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int machine__map_x86_64_entry_trampolines(struct machine *machine,
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struct dso *kernel);
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#endif /* __PERF_MACHINE_H */
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