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![Konstantin Khlebnikov](/assets/img/avatar_default.png)
This function splits and removes overlapping areas. Maps in tree are ordered by start address thus we could find first overlap and stop if next map does not overlap. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/153365189407.435244.7234821822450484712.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
907 lines
20 KiB
C
907 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "symbol.h"
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
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#include "map.h"
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#include "thread.h"
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#include "vdso.h"
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#include "build-id.h"
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#include "util.h"
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#include "debug.h"
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#include "machine.h"
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#include <linux/string.h>
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#include "srcline.h"
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#include "namespaces.h"
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#include "unwind.h"
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static void __maps__insert(struct maps *maps, struct map *map);
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static inline int is_anon_memory(const char *filename, u32 flags)
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{
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return flags & MAP_HUGETLB ||
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!strcmp(filename, "//anon") ||
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!strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
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!strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
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}
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static inline int is_no_dso_memory(const char *filename)
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{
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return !strncmp(filename, "[stack", 6) ||
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!strncmp(filename, "/SYSV",5) ||
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!strcmp(filename, "[heap]");
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}
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static inline int is_android_lib(const char *filename)
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{
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return !strncmp(filename, "/data/app-lib", 13) ||
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!strncmp(filename, "/system/lib", 11);
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}
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static inline bool replace_android_lib(const char *filename, char *newfilename)
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{
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const char *libname;
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char *app_abi;
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size_t app_abi_length, new_length;
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size_t lib_length = 0;
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libname = strrchr(filename, '/');
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if (libname)
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lib_length = strlen(libname);
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app_abi = getenv("APP_ABI");
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if (!app_abi)
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return false;
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app_abi_length = strlen(app_abi);
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if (!strncmp(filename, "/data/app-lib", 13)) {
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char *apk_path;
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if (!app_abi_length)
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return false;
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new_length = 7 + app_abi_length + lib_length;
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apk_path = getenv("APK_PATH");
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if (apk_path) {
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new_length += strlen(apk_path) + 1;
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if (new_length > PATH_MAX)
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return false;
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snprintf(newfilename, new_length,
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"%s/libs/%s/%s", apk_path, app_abi, libname);
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} else {
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if (new_length > PATH_MAX)
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return false;
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snprintf(newfilename, new_length,
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"libs/%s/%s", app_abi, libname);
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}
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return true;
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}
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if (!strncmp(filename, "/system/lib/", 11)) {
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char *ndk, *app;
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const char *arch;
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size_t ndk_length;
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size_t app_length;
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ndk = getenv("NDK_ROOT");
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app = getenv("APP_PLATFORM");
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if (!(ndk && app))
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return false;
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ndk_length = strlen(ndk);
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app_length = strlen(app);
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if (!(ndk_length && app_length && app_abi_length))
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return false;
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arch = !strncmp(app_abi, "arm", 3) ? "arm" :
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!strncmp(app_abi, "mips", 4) ? "mips" :
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!strncmp(app_abi, "x86", 3) ? "x86" : NULL;
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if (!arch)
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return false;
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new_length = 27 + ndk_length +
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app_length + lib_length
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+ strlen(arch);
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if (new_length > PATH_MAX)
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return false;
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snprintf(newfilename, new_length,
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"%s/platforms/%s/arch-%s/usr/lib/%s",
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ndk, app, arch, libname);
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return true;
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}
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return false;
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}
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void map__init(struct map *map, u64 start, u64 end, u64 pgoff, struct dso *dso)
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{
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map->start = start;
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map->end = end;
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map->pgoff = pgoff;
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map->reloc = 0;
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map->dso = dso__get(dso);
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map->map_ip = map__map_ip;
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map->unmap_ip = map__unmap_ip;
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RB_CLEAR_NODE(&map->rb_node);
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map->groups = NULL;
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map->erange_warned = false;
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refcount_set(&map->refcnt, 1);
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}
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struct map *map__new(struct machine *machine, u64 start, u64 len,
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u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
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u64 ino_gen, u32 prot, u32 flags, char *filename,
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struct thread *thread)
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{
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struct map *map = malloc(sizeof(*map));
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struct nsinfo *nsi = NULL;
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struct nsinfo *nnsi;
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if (map != NULL) {
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char newfilename[PATH_MAX];
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struct dso *dso;
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int anon, no_dso, vdso, android;
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android = is_android_lib(filename);
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anon = is_anon_memory(filename, flags);
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vdso = is_vdso_map(filename);
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no_dso = is_no_dso_memory(filename);
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map->maj = d_maj;
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map->min = d_min;
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map->ino = ino;
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map->ino_generation = ino_gen;
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map->prot = prot;
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map->flags = flags;
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nsi = nsinfo__get(thread->nsinfo);
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if ((anon || no_dso) && nsi && (prot & PROT_EXEC)) {
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snprintf(newfilename, sizeof(newfilename),
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"/tmp/perf-%d.map", nsi->pid);
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filename = newfilename;
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}
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if (android) {
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if (replace_android_lib(filename, newfilename))
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filename = newfilename;
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}
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if (vdso) {
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/* The vdso maps are always on the host and not the
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* container. Ensure that we don't use setns to look
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* them up.
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*/
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nnsi = nsinfo__copy(nsi);
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if (nnsi) {
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nsinfo__put(nsi);
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nnsi->need_setns = false;
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nsi = nnsi;
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}
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pgoff = 0;
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dso = machine__findnew_vdso(machine, thread);
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} else
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dso = machine__findnew_dso(machine, filename);
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if (dso == NULL)
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goto out_delete;
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map__init(map, start, start + len, pgoff, dso);
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if (anon || no_dso) {
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map->map_ip = map->unmap_ip = identity__map_ip;
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/*
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* Set memory without DSO as loaded. All map__find_*
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* functions still return NULL, and we avoid the
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* unnecessary map__load warning.
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*/
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if (!(prot & PROT_EXEC))
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dso__set_loaded(dso);
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}
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dso->nsinfo = nsi;
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dso__put(dso);
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}
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return map;
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out_delete:
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nsinfo__put(nsi);
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free(map);
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return NULL;
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}
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/*
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* Constructor variant for modules (where we know from /proc/modules where
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* they are loaded) and for vmlinux, where only after we load all the
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* symbols we'll know where it starts and ends.
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*/
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struct map *map__new2(u64 start, struct dso *dso)
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{
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struct map *map = calloc(1, (sizeof(*map) +
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(dso->kernel ? sizeof(struct kmap) : 0)));
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if (map != NULL) {
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/*
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* ->end will be filled after we load all the symbols
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*/
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map__init(map, start, 0, 0, dso);
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}
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return map;
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}
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/*
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* Use this and __map__is_kmodule() for map instances that are in
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* machine->kmaps, and thus have map->groups->machine all properly set, to
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* disambiguate between the kernel and modules.
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*
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* When the need arises, introduce map__is_{kernel,kmodule)() that
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* checks (map->groups != NULL && map->groups->machine != NULL &&
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* map->dso->kernel) before calling __map__is_{kernel,kmodule}())
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*/
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bool __map__is_kernel(const struct map *map)
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{
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return machine__kernel_map(map->groups->machine) == map;
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}
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bool __map__is_extra_kernel_map(const struct map *map)
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{
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struct kmap *kmap = __map__kmap((struct map *)map);
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return kmap && kmap->name[0];
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}
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bool map__has_symbols(const struct map *map)
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{
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return dso__has_symbols(map->dso);
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}
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static void map__exit(struct map *map)
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{
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BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
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dso__zput(map->dso);
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}
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void map__delete(struct map *map)
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{
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map__exit(map);
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free(map);
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}
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void map__put(struct map *map)
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{
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if (map && refcount_dec_and_test(&map->refcnt))
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map__delete(map);
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}
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void map__fixup_start(struct map *map)
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{
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struct rb_root *symbols = &map->dso->symbols;
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struct rb_node *nd = rb_first(symbols);
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if (nd != NULL) {
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struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
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map->start = sym->start;
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}
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}
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void map__fixup_end(struct map *map)
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{
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struct rb_root *symbols = &map->dso->symbols;
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struct rb_node *nd = rb_last(symbols);
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if (nd != NULL) {
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struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
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map->end = sym->end;
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}
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}
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#define DSO__DELETED "(deleted)"
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int map__load(struct map *map)
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{
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const char *name = map->dso->long_name;
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int nr;
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if (dso__loaded(map->dso))
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return 0;
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nr = dso__load(map->dso, map);
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if (nr < 0) {
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if (map->dso->has_build_id) {
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char sbuild_id[SBUILD_ID_SIZE];
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build_id__sprintf(map->dso->build_id,
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sizeof(map->dso->build_id),
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sbuild_id);
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pr_warning("%s with build id %s not found",
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name, sbuild_id);
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} else
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pr_warning("Failed to open %s", name);
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pr_warning(", continuing without symbols\n");
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return -1;
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} else if (nr == 0) {
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#ifdef HAVE_LIBELF_SUPPORT
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const size_t len = strlen(name);
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const size_t real_len = len - sizeof(DSO__DELETED);
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if (len > sizeof(DSO__DELETED) &&
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strcmp(name + real_len + 1, DSO__DELETED) == 0) {
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pr_warning("%.*s was updated (is prelink enabled?). "
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"Restart the long running apps that use it!\n",
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(int)real_len, name);
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} else {
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pr_warning("no symbols found in %s, maybe install "
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"a debug package?\n", name);
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}
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#endif
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return -1;
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}
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return 0;
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}
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struct symbol *map__find_symbol(struct map *map, u64 addr)
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{
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if (map__load(map) < 0)
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return NULL;
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return dso__find_symbol(map->dso, addr);
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}
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struct symbol *map__find_symbol_by_name(struct map *map, const char *name)
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{
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if (map__load(map) < 0)
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return NULL;
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if (!dso__sorted_by_name(map->dso))
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dso__sort_by_name(map->dso);
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return dso__find_symbol_by_name(map->dso, name);
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}
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struct map *map__clone(struct map *from)
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{
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struct map *map = memdup(from, sizeof(*map));
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if (map != NULL) {
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refcount_set(&map->refcnt, 1);
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RB_CLEAR_NODE(&map->rb_node);
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dso__get(map->dso);
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map->groups = NULL;
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}
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return map;
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}
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size_t map__fprintf(struct map *map, FILE *fp)
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{
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return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
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map->start, map->end, map->pgoff, map->dso->name);
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}
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size_t map__fprintf_dsoname(struct map *map, FILE *fp)
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{
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const char *dsoname = "[unknown]";
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if (map && map->dso) {
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if (symbol_conf.show_kernel_path && map->dso->long_name)
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dsoname = map->dso->long_name;
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else
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dsoname = map->dso->name;
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}
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return fprintf(fp, "%s", dsoname);
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}
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char *map__srcline(struct map *map, u64 addr, struct symbol *sym)
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{
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if (map == NULL)
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return SRCLINE_UNKNOWN;
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return get_srcline(map->dso, map__rip_2objdump(map, addr), sym, true, true, addr);
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}
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int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
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FILE *fp)
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{
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int ret = 0;
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if (map && map->dso) {
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char *srcline = map__srcline(map, addr, NULL);
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if (srcline != SRCLINE_UNKNOWN)
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ret = fprintf(fp, "%s%s", prefix, srcline);
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free_srcline(srcline);
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}
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return ret;
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}
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/**
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* map__rip_2objdump - convert symbol start address to objdump address.
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* @map: memory map
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* @rip: symbol start address
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*
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* objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
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* map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
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* relative to section start.
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*
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* Return: Address suitable for passing to "objdump --start-address="
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*/
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u64 map__rip_2objdump(struct map *map, u64 rip)
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{
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struct kmap *kmap = __map__kmap(map);
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/*
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* vmlinux does not have program headers for PTI entry trampolines and
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* kcore may not either. However the trampoline object code is on the
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* main kernel map, so just use that instead.
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*/
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if (kmap && is_entry_trampoline(kmap->name) && kmap->kmaps && kmap->kmaps->machine) {
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struct map *kernel_map = machine__kernel_map(kmap->kmaps->machine);
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if (kernel_map)
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map = kernel_map;
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}
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if (!map->dso->adjust_symbols)
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return rip;
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if (map->dso->rel)
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return rip - map->pgoff;
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/*
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* kernel modules also have DSO_TYPE_USER in dso->kernel,
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* but all kernel modules are ET_REL, so won't get here.
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*/
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if (map->dso->kernel == DSO_TYPE_USER)
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return rip + map->dso->text_offset;
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return map->unmap_ip(map, rip) - map->reloc;
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}
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/**
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* map__objdump_2mem - convert objdump address to a memory address.
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* @map: memory map
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* @ip: objdump address
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*
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* Closely related to map__rip_2objdump(), this function takes an address from
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* objdump and converts it to a memory address. Note this assumes that @map
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* contains the address. To be sure the result is valid, check it forwards
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* e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
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*
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* Return: Memory address.
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*/
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u64 map__objdump_2mem(struct map *map, u64 ip)
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{
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if (!map->dso->adjust_symbols)
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return map->unmap_ip(map, ip);
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if (map->dso->rel)
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return map->unmap_ip(map, ip + map->pgoff);
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/*
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* kernel modules also have DSO_TYPE_USER in dso->kernel,
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* but all kernel modules are ET_REL, so won't get here.
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*/
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if (map->dso->kernel == DSO_TYPE_USER)
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return map->unmap_ip(map, ip - map->dso->text_offset);
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return ip + map->reloc;
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}
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static void maps__init(struct maps *maps)
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{
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maps->entries = RB_ROOT;
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init_rwsem(&maps->lock);
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}
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void map_groups__init(struct map_groups *mg, struct machine *machine)
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{
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maps__init(&mg->maps);
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mg->machine = machine;
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refcount_set(&mg->refcnt, 1);
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}
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static void __maps__purge(struct maps *maps)
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{
|
|
struct rb_root *root = &maps->entries;
|
|
struct rb_node *next = rb_first(root);
|
|
|
|
while (next) {
|
|
struct map *pos = rb_entry(next, struct map, rb_node);
|
|
|
|
next = rb_next(&pos->rb_node);
|
|
rb_erase_init(&pos->rb_node, root);
|
|
map__put(pos);
|
|
}
|
|
}
|
|
|
|
static void maps__exit(struct maps *maps)
|
|
{
|
|
down_write(&maps->lock);
|
|
__maps__purge(maps);
|
|
up_write(&maps->lock);
|
|
}
|
|
|
|
void map_groups__exit(struct map_groups *mg)
|
|
{
|
|
maps__exit(&mg->maps);
|
|
}
|
|
|
|
bool map_groups__empty(struct map_groups *mg)
|
|
{
|
|
return !maps__first(&mg->maps);
|
|
}
|
|
|
|
struct map_groups *map_groups__new(struct machine *machine)
|
|
{
|
|
struct map_groups *mg = malloc(sizeof(*mg));
|
|
|
|
if (mg != NULL)
|
|
map_groups__init(mg, machine);
|
|
|
|
return mg;
|
|
}
|
|
|
|
void map_groups__delete(struct map_groups *mg)
|
|
{
|
|
map_groups__exit(mg);
|
|
free(mg);
|
|
}
|
|
|
|
void map_groups__put(struct map_groups *mg)
|
|
{
|
|
if (mg && refcount_dec_and_test(&mg->refcnt))
|
|
map_groups__delete(mg);
|
|
}
|
|
|
|
struct symbol *map_groups__find_symbol(struct map_groups *mg,
|
|
u64 addr, struct map **mapp)
|
|
{
|
|
struct map *map = map_groups__find(mg, addr);
|
|
|
|
/* Ensure map is loaded before using map->map_ip */
|
|
if (map != NULL && map__load(map) >= 0) {
|
|
if (mapp != NULL)
|
|
*mapp = map;
|
|
return map__find_symbol(map, map->map_ip(map, addr));
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
|
|
struct map **mapp)
|
|
{
|
|
struct symbol *sym;
|
|
struct rb_node *nd;
|
|
|
|
down_read(&maps->lock);
|
|
|
|
for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
|
|
struct map *pos = rb_entry(nd, struct map, rb_node);
|
|
|
|
sym = map__find_symbol_by_name(pos, name);
|
|
|
|
if (sym == NULL)
|
|
continue;
|
|
if (mapp != NULL)
|
|
*mapp = pos;
|
|
goto out;
|
|
}
|
|
|
|
sym = NULL;
|
|
out:
|
|
up_read(&maps->lock);
|
|
return sym;
|
|
}
|
|
|
|
struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
|
|
const char *name,
|
|
struct map **mapp)
|
|
{
|
|
return maps__find_symbol_by_name(&mg->maps, name, mapp);
|
|
}
|
|
|
|
int map_groups__find_ams(struct addr_map_symbol *ams)
|
|
{
|
|
if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
|
|
if (ams->map->groups == NULL)
|
|
return -1;
|
|
ams->map = map_groups__find(ams->map->groups, ams->addr);
|
|
if (ams->map == NULL)
|
|
return -1;
|
|
}
|
|
|
|
ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
|
|
ams->sym = map__find_symbol(ams->map, ams->al_addr);
|
|
|
|
return ams->sym ? 0 : -1;
|
|
}
|
|
|
|
static size_t maps__fprintf(struct maps *maps, FILE *fp)
|
|
{
|
|
size_t printed = 0;
|
|
struct rb_node *nd;
|
|
|
|
down_read(&maps->lock);
|
|
|
|
for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
|
|
struct map *pos = rb_entry(nd, struct map, rb_node);
|
|
printed += fprintf(fp, "Map:");
|
|
printed += map__fprintf(pos, fp);
|
|
if (verbose > 2) {
|
|
printed += dso__fprintf(pos->dso, fp);
|
|
printed += fprintf(fp, "--\n");
|
|
}
|
|
}
|
|
|
|
up_read(&maps->lock);
|
|
|
|
return printed;
|
|
}
|
|
|
|
size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
|
|
{
|
|
return maps__fprintf(&mg->maps, fp);
|
|
}
|
|
|
|
static void __map_groups__insert(struct map_groups *mg, struct map *map)
|
|
{
|
|
__maps__insert(&mg->maps, map);
|
|
map->groups = mg;
|
|
}
|
|
|
|
static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
|
|
{
|
|
struct rb_root *root;
|
|
struct rb_node *next, *first;
|
|
int err = 0;
|
|
|
|
down_write(&maps->lock);
|
|
|
|
root = &maps->entries;
|
|
|
|
/*
|
|
* Find first map where end > map->start.
|
|
* Same as find_vma() in kernel.
|
|
*/
|
|
next = root->rb_node;
|
|
first = NULL;
|
|
while (next) {
|
|
struct map *pos = rb_entry(next, struct map, rb_node);
|
|
|
|
if (pos->end > map->start) {
|
|
first = next;
|
|
if (pos->start <= map->start)
|
|
break;
|
|
next = next->rb_left;
|
|
} else
|
|
next = next->rb_right;
|
|
}
|
|
|
|
next = first;
|
|
while (next) {
|
|
struct map *pos = rb_entry(next, struct map, rb_node);
|
|
next = rb_next(&pos->rb_node);
|
|
|
|
/*
|
|
* Stop if current map starts after map->end.
|
|
* Maps are ordered by start: next will not overlap for sure.
|
|
*/
|
|
if (pos->start >= map->end)
|
|
break;
|
|
|
|
if (verbose >= 2) {
|
|
|
|
if (use_browser) {
|
|
pr_warning("overlapping maps in %s "
|
|
"(disable tui for more info)\n",
|
|
map->dso->name);
|
|
} else {
|
|
fputs("overlapping maps:\n", fp);
|
|
map__fprintf(map, fp);
|
|
map__fprintf(pos, fp);
|
|
}
|
|
}
|
|
|
|
rb_erase_init(&pos->rb_node, root);
|
|
/*
|
|
* Now check if we need to create new maps for areas not
|
|
* overlapped by the new map:
|
|
*/
|
|
if (map->start > pos->start) {
|
|
struct map *before = map__clone(pos);
|
|
|
|
if (before == NULL) {
|
|
err = -ENOMEM;
|
|
goto put_map;
|
|
}
|
|
|
|
before->end = map->start;
|
|
__map_groups__insert(pos->groups, before);
|
|
if (verbose >= 2 && !use_browser)
|
|
map__fprintf(before, fp);
|
|
map__put(before);
|
|
}
|
|
|
|
if (map->end < pos->end) {
|
|
struct map *after = map__clone(pos);
|
|
|
|
if (after == NULL) {
|
|
err = -ENOMEM;
|
|
goto put_map;
|
|
}
|
|
|
|
after->start = map->end;
|
|
__map_groups__insert(pos->groups, after);
|
|
if (verbose >= 2 && !use_browser)
|
|
map__fprintf(after, fp);
|
|
map__put(after);
|
|
}
|
|
put_map:
|
|
map__put(pos);
|
|
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
up_write(&maps->lock);
|
|
return err;
|
|
}
|
|
|
|
int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
|
|
FILE *fp)
|
|
{
|
|
return maps__fixup_overlappings(&mg->maps, map, fp);
|
|
}
|
|
|
|
/*
|
|
* XXX This should not really _copy_ te maps, but refcount them.
|
|
*/
|
|
int map_groups__clone(struct thread *thread, struct map_groups *parent)
|
|
{
|
|
struct map_groups *mg = thread->mg;
|
|
int err = -ENOMEM;
|
|
struct map *map;
|
|
struct maps *maps = &parent->maps;
|
|
|
|
down_read(&maps->lock);
|
|
|
|
for (map = maps__first(maps); map; map = map__next(map)) {
|
|
struct map *new = map__clone(map);
|
|
if (new == NULL)
|
|
goto out_unlock;
|
|
|
|
err = unwind__prepare_access(thread, new, NULL);
|
|
if (err)
|
|
goto out_unlock;
|
|
|
|
map_groups__insert(mg, new);
|
|
map__put(new);
|
|
}
|
|
|
|
err = 0;
|
|
out_unlock:
|
|
up_read(&maps->lock);
|
|
return err;
|
|
}
|
|
|
|
static void __maps__insert(struct maps *maps, struct map *map)
|
|
{
|
|
struct rb_node **p = &maps->entries.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
const u64 ip = map->start;
|
|
struct map *m;
|
|
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
m = rb_entry(parent, struct map, rb_node);
|
|
if (ip < m->start)
|
|
p = &(*p)->rb_left;
|
|
else
|
|
p = &(*p)->rb_right;
|
|
}
|
|
|
|
rb_link_node(&map->rb_node, parent, p);
|
|
rb_insert_color(&map->rb_node, &maps->entries);
|
|
map__get(map);
|
|
}
|
|
|
|
void maps__insert(struct maps *maps, struct map *map)
|
|
{
|
|
down_write(&maps->lock);
|
|
__maps__insert(maps, map);
|
|
up_write(&maps->lock);
|
|
}
|
|
|
|
static void __maps__remove(struct maps *maps, struct map *map)
|
|
{
|
|
rb_erase_init(&map->rb_node, &maps->entries);
|
|
map__put(map);
|
|
}
|
|
|
|
void maps__remove(struct maps *maps, struct map *map)
|
|
{
|
|
down_write(&maps->lock);
|
|
__maps__remove(maps, map);
|
|
up_write(&maps->lock);
|
|
}
|
|
|
|
struct map *maps__find(struct maps *maps, u64 ip)
|
|
{
|
|
struct rb_node **p, *parent = NULL;
|
|
struct map *m;
|
|
|
|
down_read(&maps->lock);
|
|
|
|
p = &maps->entries.rb_node;
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
m = rb_entry(parent, struct map, rb_node);
|
|
if (ip < m->start)
|
|
p = &(*p)->rb_left;
|
|
else if (ip >= m->end)
|
|
p = &(*p)->rb_right;
|
|
else
|
|
goto out;
|
|
}
|
|
|
|
m = NULL;
|
|
out:
|
|
up_read(&maps->lock);
|
|
return m;
|
|
}
|
|
|
|
struct map *maps__first(struct maps *maps)
|
|
{
|
|
struct rb_node *first = rb_first(&maps->entries);
|
|
|
|
if (first)
|
|
return rb_entry(first, struct map, rb_node);
|
|
return NULL;
|
|
}
|
|
|
|
struct map *map__next(struct map *map)
|
|
{
|
|
struct rb_node *next = rb_next(&map->rb_node);
|
|
|
|
if (next)
|
|
return rb_entry(next, struct map, rb_node);
|
|
return NULL;
|
|
}
|
|
|
|
struct kmap *__map__kmap(struct map *map)
|
|
{
|
|
if (!map->dso || !map->dso->kernel)
|
|
return NULL;
|
|
return (struct kmap *)(map + 1);
|
|
}
|
|
|
|
struct kmap *map__kmap(struct map *map)
|
|
{
|
|
struct kmap *kmap = __map__kmap(map);
|
|
|
|
if (!kmap)
|
|
pr_err("Internal error: map__kmap with a non-kernel map\n");
|
|
return kmap;
|
|
}
|
|
|
|
struct map_groups *map__kmaps(struct map *map)
|
|
{
|
|
struct kmap *kmap = map__kmap(map);
|
|
|
|
if (!kmap || !kmap->kmaps) {
|
|
pr_err("Internal error: map__kmaps with a non-kernel map\n");
|
|
return NULL;
|
|
}
|
|
return kmap->kmaps;
|
|
}
|