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 "LineBuffer.h"
29 #include "NativeInfo.h"
30
31 // This function is not re-entrant since it uses a static buffer for
32 // the line data.
GetNativeInfo(int smaps_fd,size_t * pss_bytes,size_t * va_bytes)33 void GetNativeInfo(int smaps_fd, size_t* pss_bytes, size_t* va_bytes) {
34 static char map_buffer[65535];
35 LineBuffer line_buf(smaps_fd, map_buffer, sizeof(map_buffer));
36 char* line;
37 size_t total_pss_bytes = 0;
38 size_t total_va_bytes = 0;
39 size_t line_len;
40 bool native_map = false;
41 while (line_buf.GetLine(&line, &line_len)) {
42 uintptr_t start, end;
43 int name_pos;
44 size_t native_pss_kB;
45 if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %*4s %*x %*x:%*x %*d %n",
46 &start, &end, &name_pos) == 2) {
47 if (strcmp(line + name_pos, "[anon:libc_malloc]") == 0 ||
48 strcmp(line + name_pos, "[heap]") == 0) {
49 total_va_bytes += end - start;
50 native_map = true;
51 } else {
52 native_map = false;
53 }
54 } else if (native_map && sscanf(line, "Pss: %zu", &native_pss_kB) == 1) {
55 total_pss_bytes += native_pss_kB * 1024;
56 }
57 }
58 close(smaps_fd);
59 *pss_bytes = total_pss_bytes;
60 *va_bytes = total_va_bytes;
61 }
62
PrintNativeInfo(const char * preamble)63 void PrintNativeInfo(const char* preamble) {
64 size_t pss_bytes;
65 size_t va_bytes;
66
67 int smaps_fd = open("/proc/self/smaps", O_RDONLY);
68 if (smaps_fd == -1) {
69 err(1, "Cannot open /proc/self/smaps: %s\n", strerror(errno));
70 }
71
72 GetNativeInfo(smaps_fd, &pss_bytes, &va_bytes);
73 printf("%sNative PSS: %zu bytes %0.2fMB\n", preamble, pss_bytes, pss_bytes/(1024*1024.0));
74 printf("%sNative VA Space: %zu bytes %0.2fMB\n", preamble, va_bytes, va_bytes/(1024*1024.0));
75 fflush(stdout);
76
77 close(smaps_fd);
78 }
79