path: root/tools/perf/util/map.c

#include "symbol.h"
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "map.h"
#include "thread.h"
#include "strlist.h"
#include "vdso.h"
#include "build-id.h"
#include "util.h"
#include <linux/string.h>

const char *map_type__name[MAP__NR_TYPES] = {
	[MAP__FUNCTION] = "Functions",
	[MAP__VARIABLE] = "Variables",
};

static inline int is_anon_memory(const char *filename)
{
	return !strcmp(filename, "//anon") ||
	       !strcmp(filename, "/dev/zero (deleted)") ||
	       !strcmp(filename, "/anon_hugepage (deleted)");
}

static inline int is_no_dso_memory(const char *filename)
{
	return !strncmp(filename, "[stack", 6) ||
	       !strcmp(filename, "[heap]");
}

static inline int is_android_lib(const char *filename)
{
	return !strncmp(filename, "/data/app-lib", 13) ||
	       !strncmp(filename, "/system/lib", 11);
}

static inline bool replace_android_lib(const char *filename, char *newfilename)
{
	const char *libname;
	char *app_abi;
	size_t app_abi_length, new_length;
	size_t lib_length = 0;

	libname  = strrchr(filename, '/');
	if (libname)
		lib_length = strlen(libname);

	app_abi = getenv("APP_ABI");
	if (!app_abi)
		return false;

	app_abi_length = strlen(app_abi);

	if (!strncmp(filename, "/data/app-lib", 13)) {
		char *apk_path;

		if (!app_abi_length)
			return false;

		new_length = 7 + app_abi_length + lib_length;

		apk_path = getenv("APK_PATH");
		if (apk_path) {
			new_length += strlen(apk_path) + 1;
			if (new_length > PATH_MAX)
				return false;
			snprintf(newfilename, new_length,
				 "%s/libs/%s/%s", apk_path, app_abi, libname);
		} else {
			if (new_length > PATH_MAX)
				return false;
			snprintf(newfilename, new_length,
				 "libs/%s/%s", app_abi, libname);
		}
		return true;
	}

	if (!strncmp(filename, "/system/lib/", 11)) {
		char *ndk, *app;
		const char *arch;
		size_t ndk_length;
		size_t app_length;

		ndk = getenv("NDK_ROOT");
		app = getenv("APP_PLATFORM");

		if (!(ndk && app))
			return false;

		ndk_length = strlen(ndk);
		app_length = strlen(app);

		if (!(ndk_length && app_length && app_abi_length))
			return false;

		arch = !strncmp(app_abi, "arm", 3) ? "arm" :
		       !strncmp(app_abi, "mips", 4) ? "mips" :
		       !strncmp(app_abi, "x86", 3) ? "x86" : NULL;

		if (!arch)
			return false;

		new_length = 27 + ndk_length +
			     app_length + lib_length
			   + strlen(arch);

		if (new_length > PATH_MAX)
			return false;
		snprintf(newfilename, new_length,
			"%s/platforms/%s/arch-%s/usr/lib/%s",
			ndk, app, arch, libname);

		return true;
	}
	return false;
}

void map__init(struct map *map, enum map_type type,
	       u64 start, u64 end, u64 pgoff, struct dso *dso)
{
	map->type     = type;
	map->start    = start;
	map->end      = end;
	map->pgoff    = pgoff;
	map->reloc    = 0;
	map->dso      = dso;
	map->map_ip   = map__map_ip;
	map->unmap_ip = map__unmap_ip;
	RB_CLEAR_NODE(&map->rb_node);
	map->groups   = NULL;
	map->referenced = false;
	map->erange_warned = false;
}

struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
		     u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
		     u64 ino_gen, char *filename,
		     enum map_type type)
{
	struct map *map = malloc(sizeof(*map));

	if (map != NULL) {
		char newfilename[PATH_MAX];
		struct dso *dso;
		int anon, no_dso, vdso, android;

		android = is_android_lib(filename);
		anon = is_anon_memory(filename);
		vdso = is_vdso_map(filename);
		no_dso = is_no_dso_memory(filename);

		map->maj = d_maj;
		map->min = d_min;
		map->ino = ino;
		map->ino_generation = ino_gen;

		if ((anon || no_dso) && type == MAP__FUNCTION) {
			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
			filename = newfilename;
		}

		if (android) {
			if (replace_android_lib(filename, newfilename