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78 lines
2.4 KiB
78 lines
2.4 KiB
/* |
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* Copyright (C) 2014 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 <err.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <inttypes.h> |
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#include <stdint.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include "LineBuffer.h" |
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#include "NativeInfo.h" |
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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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void GetNativeInfo(int smaps_fd, size_t* pss_bytes, size_t* va_bytes) { |
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static char map_buffer[65535]; |
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LineBuffer line_buf(smaps_fd, map_buffer, sizeof(map_buffer)); |
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char* line; |
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size_t total_pss_bytes = 0; |
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size_t total_va_bytes = 0; |
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size_t line_len; |
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bool native_map = false; |
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while (line_buf.GetLine(&line, &line_len)) { |
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uintptr_t start, end; |
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int name_pos; |
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size_t native_pss_kB; |
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if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %*4s %*x %*x:%*x %*d %n", |
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&start, &end, &name_pos) == 2) { |
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if (strcmp(line + name_pos, "[anon:libc_malloc]") == 0 || |
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strcmp(line + name_pos, "[heap]") == 0) { |
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total_va_bytes += end - start; |
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native_map = true; |
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} else { |
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native_map = false; |
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} |
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} else if (native_map && sscanf(line, "Pss: %zu", &native_pss_kB) == 1) { |
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total_pss_bytes += native_pss_kB * 1024; |
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} |
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} |
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close(smaps_fd); |
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*pss_bytes = total_pss_bytes; |
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*va_bytes = total_va_bytes; |
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} |
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void PrintNativeInfo(const char* preamble) { |
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size_t pss_bytes; |
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size_t va_bytes; |
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int smaps_fd = open("/proc/self/smaps", O_RDONLY); |
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if (smaps_fd == -1) { |
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err(1, "Cannot open /proc/self/smaps: %s\n", strerror(errno)); |
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} |
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GetNativeInfo(smaps_fd, &pss_bytes, &va_bytes); |
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printf("%sNative PSS: %zu bytes %0.2fMB\n", preamble, pss_bytes, pss_bytes/(1024*1024.0)); |
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printf("%sNative VA Space: %zu bytes %0.2fMB\n", preamble, va_bytes, va_bytes/(1024*1024.0)); |
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fflush(stdout); |
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close(smaps_fd); |
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}
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