summaryrefslogtreecommitdiffstats
path: root/libcorkscrew/map_info.c
diff options
context:
space:
mode:
Diffstat (limited to 'libcorkscrew/map_info.c')
-rw-r--r--libcorkscrew/map_info.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/libcorkscrew/map_info.c b/libcorkscrew/map_info.c
deleted file mode 100644
index 93dffbf..0000000
--- a/libcorkscrew/map_info.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "Corkscrew"
-//#define LOG_NDEBUG 0
-
-#include <corkscrew/map_info.h>
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <cutils/log.h>
-#include <sys/time.h>
-
-#if defined(__APPLE__)
-
-// Mac OS vmmap(1) output:
-// __TEXT 0009f000-000a1000 [ 8K 8K] r-x/rwx SM=COW /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0 1 2 3 4 5
-static map_info_t* parse_vmmap_line(const char* line) {
- unsigned long int start;
- unsigned long int end;
- char permissions[4];
- int name_pos;
- if (sscanf(line, "%*21c %lx-%lx [%*13c] %3c/%*3c SM=%*3c %n",
- &start, &end, permissions, &name_pos) != 3) {
- return NULL;
- }
-
- const char* name = line + name_pos;
- size_t name_len = strlen(name);
-
- map_info_t* mi = calloc(1, sizeof(map_info_t) + name_len);
- if (mi != NULL) {
- mi->start = start;
- mi->end = end;
- mi->is_readable = permissions[0] == 'r';
- mi->is_writable = permissions[1] == 'w';
- mi->is_executable = permissions[2] == 'x';
- mi->data = NULL;
- memcpy(mi->name, name, name_len);
- mi->name[name_len - 1] = '\0';
- ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
- "is_readable=%d, is_writable=%d is_executable=%d, name=%s",
- mi->start, mi->end,
- mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
- }
- return mi;
-}
-
-map_info_t* load_map_info_list(pid_t pid) {
- char cmd[1024];
- snprintf(cmd, sizeof(cmd), "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid);
- FILE* fp = popen(cmd, "r");
- if (fp == NULL) {
- return NULL;
- }
-
- char line[1024];
- map_info_t* milist = NULL;
- while (fgets(line, sizeof(line), fp) != NULL) {
- map_info_t* mi = parse_vmmap_line(line);
- if (mi != NULL) {
- mi->next = milist;
- milist = mi;
- }
- }
- pclose(fp);
- return milist;
-}
-
-#else
-
-// Linux /proc/<pid>/maps lines:
-// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0 1 2 3 4 5
-static map_info_t* parse_maps_line(const char* line)
-{
- unsigned long int start;
- unsigned long int end;
- char permissions[5];
- int name_pos;
- if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*d%n", &start, &end,
- permissions, &name_pos) != 3) {
- return NULL;
- }
-
- while (isspace(line[name_pos])) {
- name_pos += 1;
- }
- const char* name = line + name_pos;
- size_t name_len = strlen(name);
- if (name_len && name[name_len - 1] == '\n') {
- name_len -= 1;
- }
-
- map_info_t* mi = calloc(1, sizeof(map_info_t) + name_len + 1);
- if (mi) {
- mi->start = start;
- mi->end = end;
- mi->is_readable = strlen(permissions) == 4 && permissions[0] == 'r';
- mi->is_writable = strlen(permissions) == 4 && permissions[1] == 'w';
- mi->is_executable = strlen(permissions) == 4 && permissions[2] == 'x';
- mi->data = NULL;
- memcpy(mi->name, name, name_len);
- mi->name[name_len] = '\0';
- ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
- "is_readable=%d, is_writable=%d, is_executable=%d, name=%s",
- mi->start, mi->end,
- mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
- }
- return mi;
-}
-
-map_info_t* load_map_info_list(pid_t tid) {
- char path[PATH_MAX];
- char line[1024];
- FILE* fp;
- map_info_t* milist = NULL;
-
- snprintf(path, PATH_MAX, "/proc/%d/maps", tid);
- fp = fopen(path, "r");
- if (fp) {
- while(fgets(line, sizeof(line), fp)) {
- map_info_t* mi = parse_maps_line(line);
- if (mi) {
- mi->next = milist;
- milist = mi;
- }
- }
- fclose(fp);
- }
- return milist;
-}
-
-#endif
-
-void free_map_info_list(map_info_t* milist) {
- while (milist) {
- map_info_t* next = milist->next;
- free(milist);
- milist = next;
- }
-}
-
-const map_info_t* find_map_info(const map_info_t* milist, uintptr_t addr) {
- const map_info_t* mi = milist;
- while (mi && !(addr >= mi->start && addr < mi->end)) {
- mi = mi->next;
- }
- return mi;
-}
-
-bool is_readable_map(const map_info_t* milist, uintptr_t addr) {
- const map_info_t* mi = find_map_info(milist, addr);
- return mi && mi->is_readable;
-}
-
-bool is_writable_map(const map_info_t* milist, uintptr_t addr) {
- const map_info_t* mi = find_map_info(milist, addr);
- return mi && mi->is_writable;
-}
-
-bool is_executable_map(const map_info_t* milist, uintptr_t addr) {
- const map_info_t* mi = find_map_info(milist, addr);
- return mi && mi->is_executable;
-}
-
-static pthread_mutex_t g_my_map_info_list_mutex = PTHREAD_MUTEX_INITIALIZER;
-static map_info_t* g_my_map_info_list = NULL;
-
-static const int64_t MAX_CACHE_AGE = 5 * 1000 * 1000000LL;
-
-typedef struct {
- uint32_t refs;
- int64_t timestamp;
-} my_map_info_data_t;
-
-static int64_t now_ns() {
-#if defined(HAVE_POSIX_CLOCKS)
- struct timespec t;
- t.tv_sec = t.tv_nsec = 0;
- clock_gettime(CLOCK_MONOTONIC, &t);
- return t.tv_sec * 1000000000LL + t.tv_nsec;
-#else
- struct timeval t;
- gettimeofday(&t, NULL);
- return t.tv_sec * 1000000000LL + t.tv_usec * 1000LL;
-#endif
-}
-
-static void dec_ref(map_info_t* milist, my_map_info_data_t* data) {
- if (!--data->refs) {
- ALOGV("Freed my_map_info_list %p.", milist);
- free(data);
- free_map_info_list(milist);
- }
-}
-
-map_info_t* acquire_my_map_info_list() {
- pthread_mutex_lock(&g_my_map_info_list_mutex);
-
- int64_t time = now_ns();
- if (g_my_map_info_list != NULL) {
- my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
- int64_t age = time - data->timestamp;
- if (age >= MAX_CACHE_AGE) {
- ALOGV("Invalidated my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
- dec_ref(g_my_map_info_list, data);
- g_my_map_info_list = NULL;
- } else {
- ALOGV("Reusing my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
- }
- }
-
- if (g_my_map_info_list == NULL) {
- my_map_info_data_t* data = (my_map_info_data_t*)malloc(sizeof(my_map_info_data_t));
- g_my_map_info_list = load_map_info_list(getpid());
- if (g_my_map_info_list != NULL) {
- ALOGV("Loaded my_map_info_list %p.", g_my_map_info_list);
- g_my_map_info_list->data = data;
- data->refs = 1;
- data->timestamp = time;
- } else {
- free(data);
- }
- }
-
- map_info_t* milist = g_my_map_info_list;
- if (milist) {
- my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
- data->refs += 1;
- }
-
- pthread_mutex_unlock(&g_my_map_info_list_mutex);
- return milist;
-}
-
-void release_my_map_info_list(map_info_t* milist) {
- if (milist) {
- pthread_mutex_lock(&g_my_map_info_list_mutex);
-
- my_map_info_data_t* data = (my_map_info_data_t*)milist->data;
- dec_ref(milist, data);
-
- pthread_mutex_unlock(&g_my_map_info_list_mutex);
- }
-}
-
-void flush_my_map_info_list() {
- pthread_mutex_lock(&g_my_map_info_list_mutex);
-
- if (g_my_map_info_list != NULL) {
- my_map_info_data_t* data = (my_map_info_data_t*) g_my_map_info_list->data;
- dec_ref(g_my_map_info_list, data);
- g_my_map_info_list = NULL;
- }
-
- pthread_mutex_unlock(&g_my_map_info_list_mutex);
-}
generated by cgit v1.1 at 2025-08-15 15:00:25 +0000