| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #include <inttypes.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <android-base/unique_fd.h> |
| |
| #include "LineBuffer.h" |
| #include "ProcessMappings.h" |
| #include "log.h" |
| |
| // This function is not re-entrant since it uses a static buffer for |
| // the line data. |
| bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) { |
| char map_buffer[1024]; |
| snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid); |
| android::base::unique_fd fd(open(map_buffer, O_RDONLY)); |
| if (fd == -1) { |
| return false; |
| } |
| |
| LineBuffer line_buf(fd, map_buffer, sizeof(map_buffer)); |
| char* line; |
| size_t line_len; |
| while (line_buf.GetLine(&line, &line_len)) { |
| int name_pos; |
| char perms[5]; |
| Mapping mapping{}; |
| if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %4s %*x %*x:%*x %*d %n", |
| &mapping.begin, &mapping.end, perms, &name_pos) == 3) { |
| if (perms[0] == 'r') { |
| mapping.read = true; |
| } |
| if (perms[1] == 'w') { |
| mapping.write = true; |
| } |
| if (perms[2] == 'x') { |
| mapping.execute = true; |
| } |
| if (perms[3] == 'p') { |
| mapping.priv = true; |
| } |
| if ((size_t)name_pos < line_len) { |
| strlcpy(mapping.name, line + name_pos, sizeof(mapping.name)); |
| } |
| mappings.emplace_back(mapping); |
| } |
| } |
| return true; |
| } |