1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <err.h> 18 #include <errno.h> 19 #include <fcntl.h> 20 #include <inttypes.h> 21 #include <stdint.h> 22 #include <stdio.h> 23 #include <string.h> 24 #include <sys/types.h> 25 #include <sys/stat.h> 26 #include <unistd.h> 27 28 #include <android-base/unique_fd.h> 29 30 #include "LineBuffer.h" 31 #include "NativeInfo.h" 32 33 // This function is not re-entrant since it uses a static buffer for 34 // the line data. 35 void GetNativeInfo(int smaps_fd, size_t* pss_bytes, size_t* va_bytes) { 36 static char map_buffer[65535]; 37 LineBuffer line_buf(smaps_fd, map_buffer, sizeof(map_buffer)); 38 char* line; 39 size_t total_pss_bytes = 0; 40 size_t total_va_bytes = 0; 41 size_t line_len; 42 bool native_map = false; 43 while (line_buf.GetLine(&line, &line_len)) { 44 uintptr_t start, end; 45 int name_pos; 46 size_t native_pss_kB; 47 if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %*4s %*x %*x:%*x %*d %n", 48 &start, &end, &name_pos) == 2) { 49 if (strcmp(line + name_pos, "[anon:libc_malloc]") == 0 || 50 strcmp(line + name_pos, "[heap]") == 0) { 51 total_va_bytes += end - start; 52 native_map = true; 53 } else { 54 native_map = false; 55 } 56 } else if (native_map && sscanf(line, "Pss: %zu", &native_pss_kB) == 1) { 57 total_pss_bytes += native_pss_kB * 1024; 58 } 59 } 60 *pss_bytes = total_pss_bytes; 61 *va_bytes = total_va_bytes; 62 } 63 64 void PrintNativeInfo(const char* preamble) { 65 size_t pss_bytes; 66 size_t va_bytes; 67 68 android::base::unique_fd smaps_fd(open("/proc/self/smaps", O_RDONLY)); 69 if (smaps_fd == -1) { 70 err(1, "Cannot open /proc/self/smaps: %s\n", strerror(errno)); 71 } 72 73 GetNativeInfo(smaps_fd, &pss_bytes, &va_bytes); 74 printf("%sNative PSS: %zu bytes %0.2fMB\n", preamble, pss_bytes, pss_bytes/(1024*1024.0)); 75 printf("%sNative VA Space: %zu bytes %0.2fMB\n", preamble, va_bytes, va_bytes/(1024*1024.0)); 76 fflush(stdout); 77 } 78
