1. 根目录:
2. tools
3. perf
4. builtin-kvm.c

#include "builtin.h"
#include "perf.h"

#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/session.h"

#include "util/parse-options.h"
#include "util/trace-event.h"

#include "util/debug.h"

#include <sys/prctl.h>

#include <semaphore.h>
#include <pthread.h>
#include <math.h>

static const char		*file_name;
static char			name_buffer[256];

static const char * const kvm_usage[] = {
	"perf kvm [<options>] {top|record|report|diff|buildid-list}",
	NULL
};

static const struct option kvm_options[] = {
	OPT_STRING('i', "input", &file_name, "file",
		   "Input file name"),
	OPT_STRING('o', "output", &file_name, "file",
		   "Output file name"),
	OPT_BOOLEAN(0, "guest", &perf_guest,
		    "Collect guest os data"),
	OPT_BOOLEAN(0, "host", &perf_host,
		    "Collect host os data"),
	OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
		   "guest mount directory under which every guest os"
		   " instance has a subdir"),
	OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
		   "file", "file saving guest os vmlinux"),
	OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
		   "file", "file saving guest os /proc/kallsyms"),
	OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
		   "file", "file saving guest os /proc/modules"),
	OPT_END()
};

static int __cmd_record(int argc, const char **argv)
{
	int rec_argc, i = 0, j;
	const char **rec_argv;

	rec_argc = argc + 2;
	rec_argv = calloc(rec_argc + 1, sizeof(char *));
	rec_argv[i++] = strdup("record");
	rec_argv[i++] = strdup("-o");
	rec_argv[i++] = strdup(file_name);
	for (j = 1; j < argc; j++, i++)
		rec_argv[i] = argv[j];

	BUG_ON(i != rec_argc);

	return cmd_record(i, rec_argv, NULL);
}

static int __cmd_report(int argc, const char **argv)
{
	int rec_argc, i = 0, j;
	const char **rec_argv;

	rec_argc = argc + 2;
	rec_argv = calloc(rec_argc + 1, sizeof(char *));
	rec_argv[i++] = strdup("report");
	rec_argv[i++] = strdup("-i");
	rec_argv[i++] = strdup(file_name);
	for (j = 1; j < argc; j++, i++)
		rec_argv[i] = argv[j];

	BUG_ON(i != rec_argc);

	return cmd_report(i, rec_argv, NULL);
}

static int __cmd_buildid_list(int argc, const char **argv)
{
	int rec_argc, i = 0, j;
	const char **rec_argv;

	rec_argc = argc + 2;
	rec_argv = calloc(rec_argc + 1, sizeof(char *));
	rec_argv[i++] = strdup("buildid-list");
	rec_argv[i++] = strdup("-i");
	rec_argv[i++] = strdup(file_name);
	for (j = 1; j < argc; j++, i++)
		rec_argv[i] = argv[j];

	BUG_ON(i != rec_argc);

	return cmd_buildid_list(i, rec_argv, NULL);
}

int cmd_kvm(int argc, const char **argv, const char *prefix __used)
{
	perf_host  = 0;
	perf_guest = 1;

	argc = parse_options(argc, argv, kvm_options, kvm_usage,
			PARSE_OPT_STOP_AT_NON_OPTION);
	if (!argc)
		usage_with_options(kvm_usage, kvm_options);

	if (!perf_host)
		perf_guest = 1;

	if (!file_name) {
		if (perf_host && !perf_guest)
			sprintf(name_buffer, "perf.data.host");
		else if (!perf_host && perf_guest)
			sprintf(name_buffer, "perf.data.guest");
		else
			sprintf(name_buffer, "perf.data.kvm");
		file_name = name_buffer;
	}

	if (!strncmp(argv[0], "rec", 3))
		return __cmd_record(argc, argv);
	else if (!strncmp(argv[0], "rep", 3))
		return __cmd_report(argc, argv);
	else if (!strncmp(argv[0], "diff", 4))
		return cmd_diff(argc, argv, NULL);
	else if (!strncmp(argv[0], "top", 3))
		return cmd_top(argc, argv, NULL);
	else if (!strncmp(argv[0], "buildid-list", 12))
		return __cmd_buildid_list(argc, argv);
	else
		usage_with_options(kvm_usage, kvm_options);

	return 0;
}