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70 lines
2.0 KiB
70 lines
2.0 KiB
/* |
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* Copyright (C) 2016 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <fcntl.h> |
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#include <inttypes.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <android-base/unique_fd.h> |
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#include "LineBuffer.h" |
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#include "ProcessMappings.h" |
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#include "log.h" |
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namespace android { |
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// This function is not re-entrant since it uses a static buffer for |
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// the line data. |
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bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) { |
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char map_buffer[1024]; |
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snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid); |
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android::base::unique_fd fd(open(map_buffer, O_RDONLY)); |
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if (fd == -1) { |
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return false; |
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} |
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LineBuffer line_buf(fd, map_buffer, sizeof(map_buffer)); |
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char* line; |
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size_t line_len; |
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while (line_buf.GetLine(&line, &line_len)) { |
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int name_pos; |
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char perms[5]; |
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Mapping mapping{}; |
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if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %4s %*x %*x:%*x %*d %n", &mapping.begin, |
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&mapping.end, perms, &name_pos) == 3) { |
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if (perms[0] == 'r') { |
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mapping.read = true; |
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} |
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if (perms[1] == 'w') { |
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mapping.write = true; |
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} |
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if (perms[2] == 'x') { |
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mapping.execute = true; |
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} |
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if (perms[3] == 'p') { |
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mapping.priv = true; |
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} |
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if ((size_t)name_pos < line_len) { |
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strlcpy(mapping.name, line + name_pos, sizeof(mapping.name)); |
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} |
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mappings.emplace_back(mapping); |
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} |
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} |
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return true; |
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} |
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} // namespace android
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