// SPDX-License-Identifier: GPL-2.0
#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 <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include "map.h"
#include "thread.h"
#include "vdso.h"
#include "build-id.h"
#include "util.h"
#include "debug.h"
#include "machine.h"
#include <linux/string.h>
#include "srcline.h"
#include "namespaces.h"
#include "unwind.h"
#include "srccode.h"
static void __maps__insert(struct maps *maps, struct map *map);
static void __maps__insert_name(struct maps *maps, struct map *map);
static inline int is_anon_memory(const char *filename, u32 flags)
{
return flags & MAP_HUGETLB ||
!strcmp(filename, "//anon") ||
!strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
!strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
}
static inline int is_no_dso_memory(const char *filename)
{
return !strncmp(filename, "[stack", 6) ||
!strncmp(filename, "/SYSV",5) ||
!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, u64 start, u64 end, u64 pgoff, struct dso *dso)
{
map->start = start;
map->end = end;
map->pgoff = pgoff;
map->reloc = 0;
map->dso = dso__get(dso);
map->map_ip = map__map_ip;
map->unmap_ip = map__unmap_ip;
RB_CLEAR_NODE(&map->rb_node);
map->groups = NULL;
map->erange_warned = false;
refcount_set(&map->refcnt, 1);
}
struct map *map__new(struct machine *machine, u64 start, u64 len,
u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
u64 ino_gen, u32 prot, u32 flags, char *filename,
struct thread *thread)
{
struct map *map = malloc(sizeof(*map));
struct nsinfo *nsi = NULL;
struct nsinfo *nnsi;
if (map != NULL) {
char newfilename[PATH_MAX];
struct