machine.h

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_MACHINE_H
#define __PERF_MACHINE_H

#include <sys/types.h>
#include <linux/rbtree.h>
#include "map.h"
#include "dso.h"
#include "event.h"
#include "rwsem.h"

struct addr_location;
struct branch_stack;
struct perf_evsel;
struct perf_sample;
struct symbol;
struct thread;
union perf_event;

/* Native host kernel uses -1 as pid index in machine */
#define HOST_KERNEL_ID          (-1)
#define DEFAULT_GUEST_KERNEL_ID     (0)

extern const char *ref_reloc_sym_names[];

struct vdso_info;

#define THREADS__TABLE_BITS 8
#define THREADS__TABLE_SIZE (1 << THREADS__TABLE_BITS)

struct threads {
    struct rb_root    entries;
    struct rw_semaphore lock;
    unsigned int      nr;
    struct list_head  dead;
    struct thread     *last_match;
};

struct machine {
    struct rb_node    rb_node;
    pid_t         pid;
    u16       id_hdr_size;
    bool          comm_exec;
    bool          kptr_restrict_warned;
    char          *root_dir;
    char          *mmap_name;
    struct threads    threads[THREADS__TABLE_SIZE];
    struct vdso_info  *vdso_info;
    struct perf_env   *env;
    struct dsos   dsos;
    struct map_groups kmaps;
    struct map    *vmlinux_map;
    u64       kernel_start;
    pid_t         *current_tid;
    union { /* Tool specific area */
        void      *priv;
        u64   db_id;
    };
    bool          trampolines_mapped;
};

static inline struct threads *machine__threads(struct machine *machine, pid_t tid)
{
    /* Cast it to handle tid == -1 */
    return &machine->threads[(unsigned int)tid % THREADS__TABLE_SIZE];
}

/*
 * The main kernel (vmlinux) map
 */
static inline
struct map *machine__kernel_map(struct machine *machine)
{
    return machine->vmlinux_map;
}

/*
 * kernel (the one returned by machine__kernel_map()) plus kernel modules maps
 */
static inline
struct maps *machine__kernel_maps(struct machine *machine)
{
    return &machine->kmaps.maps;
}

int machine__get_kernel_start(struct machine *machine);

static inline u64 machine__kernel_start(struct machine *machine)
{
    if (!machine->kernel_start)
        machine__get_kernel_start(machine);
    return machine->kernel_start;
}

static inline bool machine__kernel_ip(struct machine *machine, u64 ip)
{
    u64 kernel_start = machine__kernel_start(machine);

    return ip >= kernel_start;
}

struct thread *machine__find_thread(struct machine *machine, pid_t pid,
                    pid_t tid);
struct comm *machine__thread_exec_comm(struct machine *machine,
                       struct thread *thread);

int machine__process_comm_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);
int machine__process_exit_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);
int machine__process_fork_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);
int machine__process_lost_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);
int machine__process_lost_samples_event(struct machine *machine, union perf_event *event,
                    struct perf_sample *sample);
int machine__process_aux_event(struct machine *machine,
                   union perf_event *event);
int machine__process_itrace_start_event(struct machine *machine,
                    union perf_event *event);
int machine__process_switch_event(struct machine *machine,
                  union perf_event *event);
int machine__process_namespaces_event(struct machine *machine,
                      union perf_event *event,
                      struct perf_sample *sample);
int machine__process_mmap_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);
int machine__process_mmap2_event(struct machine *machine, union perf_event *event,
                 struct perf_sample *sample);
int machine__process_event(struct machine *machine, union perf_event *event,
                struct perf_sample *sample);

typedef void (*machine__process_t)(struct machine *machine, void *data);

struct machines {
    struct machine host;
    struct rb_root guests;
};

void machines__init(struct machines *machines);
void machines__exit(struct machines *machines);

void machines__process_guests(struct machines *machines,
                  machine__process_t process, void *data);

struct machine *machines__add(struct machines *machines, pid_t pid,
                  const char *root_dir);
struct machine *machines__find_host(struct machines *machines);
struct machine *machines__find(struct machines *machines, pid_t pid);
struct machine *machines__findnew(struct machines *machines, pid_t pid);

void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size);
void machines__set_comm_exec(struct machines *machines, bool comm_exec);

struct machine *machine__new_host(void);
struct machine *machine__new_kallsyms(void);
int machine__init(struct machine *machine, const char *root_dir, pid_t pid);
void machine__exit(struct machine *machine);
void machine__delete_threads(struct machine *machine);
void machine__delete(struct machine *machine);
void machine__remove_thread(struct machine *machine, struct thread *th);

struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
                       struct addr_location *al);
struct mem_info *sample__resolve_mem(struct perf_sample *sample,
                     struct addr_location *al);

struct callchain_cursor;

int thread__resolve_callchain(struct thread *thread,
                  struct callchain_cursor *cursor,
                  struct perf_evsel *evsel,
                  struct perf_sample *sample,
                  struct symbol **parent,
                  struct addr_location *root_al,
                  int max_stack);

/*
 * Default guest kernel is defined by parameter --guestkallsyms
 * and --guestmodules
 */
static inline bool machine__is_default_guest(struct machine *machine)
{
    return machine ? machine->pid == DEFAULT_GUEST_KERNEL_ID : false;
}

static inline bool machine__is_host(struct machine *machine)
{
    return machine ? machine->pid == HOST_KERNEL_ID : false;
}

bool machine__is(struct machine *machine, const char *arch);
int machine__nr_cpus_avail(struct machine *machine);

struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);

struct dso *machine__findnew_dso(struct machine *machine, const char *filename);

size_t machine__fprintf(struct machine *machine, FILE *fp);

static inline
struct symbol *machine__find_kernel_symbol(struct machine *machine, u64 addr,
                       struct map **mapp)
{
    return map_groups__find_symbol(&machine->kmaps, addr, mapp);
}

static inline
struct symbol *machine__find_kernel_symbol_by_name(struct machine *machine,
                           const char *name,
                           struct map **mapp)
{
    return map_groups__find_symbol_by_name(&machine->kmaps, name, mapp);
}

struct map *machine__findnew_module_map(struct machine *machine, u64 start,
                    const char *filename);
int arch__fix_module_text_start(u64 *start, const char *name);

int machine__load_kallsyms(struct machine *machine, const char *filename);

int machine__load_vmlinux_path(struct machine *machine);

size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
                     bool (skip)(struct dso *dso, int parm), int parm);
size_t machines__fprintf_dsos(struct machines *machines, FILE *fp);
size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
                     bool (skip)(struct dso *dso, int parm), int parm);

void machine__destroy_kernel_maps(struct machine *machine);
int machine__create_kernel_maps(struct machine *machine);

int machines__create_kernel_maps(struct machines *machines, pid_t pid);
int machines__create_guest_kernel_maps(struct machines *machines);
void machines__destroy_kernel_maps(struct machines *machines);

size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);

int machine__for_each_thread(struct machine *machine,
                 int (*fn)(struct thread *thread, void *p),
                 void *priv);
int machines__for_each_thread(struct machines *machines,
                  int (*fn)(struct thread *thread, void *p),
                  void *priv);

int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
                  struct target *target, struct thread_map *threads,
                  perf_event__handler_t process, bool data_mmap,
                  unsigned int proc_map_timeout,
                  unsigned int nr_threads_synthesize);
static inline
int machine__synthesize_threads(struct machine *machine, struct target *target,
                struct thread_map *threads, bool data_mmap,
                unsigned int proc_map_timeout,
                unsigned int nr_threads_synthesize)
{
    return __machine__synthesize_threads(machine, NULL, target, threads,
                         perf_event__process, data_mmap,
                         proc_map_timeout,
                         nr_threads_synthesize);
}

pid_t machine__get_current_tid(struct machine *machine, int cpu);
int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
                 pid_t tid);
/*
 * For use with libtraceevent's pevent_set_function_resolver()
 */
char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp);

void machine__get_kallsyms_filename(struct machine *machine, char *buf,
                    size_t bufsz);

int machine__create_extra_kernel_maps(struct machine *machine,
                      struct dso *kernel);

/* Kernel-space maps for symbols that are outside the main kernel map and module maps */
struct extra_kernel_map {
    u64 start;
    u64 end;
    u64 pgoff;
    char name[KMAP_NAME_LEN];
};

int machine__create_extra_kernel_map(struct machine *machine,
                     struct dso *kernel,
                     struct extra_kernel_map *xm);

int machine__map_x86_64_entry_trampolines(struct machine *machine,
                      struct dso *kernel);

#endif /* __PERF_MACHINE_H */