测试程序时，想要查看程序真正占用了多少内存，top命令只能看个大概，于是就找到了pmap命令。
使用很简单:
1 SYNOPSIS
2 pmap [options] pid [...]
3
4 DESCRIPTION
5 The pmap command reports the memory map of a process or processes.
6
7 OPTIONS
8 -x, --extended
9 Show the extended format.
10
11 -d, --device
12 Show the device format.
13
14 -q, --quiet
15 Do not display some header or footer lines.
16
17 -A, --range low,high
18 Limit results to the given range to low and high address range. Notice that the low and high arguments are single string separated with comma.
19
20 -h, --help
21 Display help text and exit.
22
23 -V, --version
24 Display version information and exit.
下面是我的程序内存使用情况：
1 feng@server233:~$ pmap -d 4380
2 4380: /home/raozhengfeng/work/jasgreen_test/jasgreenD
3 Address Kbytes Mode Offset Device Mapping
4 0000000000400000 1892 r-x-- 0000000000000000 008:00003 jasgreenD
5 00000000007d8000 36 rw--- 00000000001d8000 008:00003 jasgreenD
6 00000000007e1000 737408 rw--- 0000000000000000 000:00000 [ anon ]
7 00007fff38000000 2648 rw--- 0000000000000000 000:00000 [ anon ]
8 00007fff38296000 62888 ----- 0000000000000000 000:00000 [ anon ]
9 00007fff40000000 64732 rw--- 0000000000000000 000:00000 [ anon ]
10 00007fff43f37000 804 ----- 0000000000000000 000:00000 [ anon ]
11 00007fff44000000 65536 rw--- 0000000000000000 000:00000 [ anon ]
12 00007fff48000000 65536 rw--- 0000000000000000 000:00000 [ anon ]
13 00007fff50000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
14 00007fff58000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
15 00007fff60000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
16 00007fff68000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
17 00007fff70000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
18 00007fff78000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
19 00007fff80000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
20 00007fff88000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
21 00007fff90000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
22 00007fff98000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
23 00007fffa0000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
24 00007fffa8000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
25 00007fffb0000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
26 00007fffb8000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
27 00007fffc0000000 131072 rw--- 0000000000000000 000:00000 [ anon ]
28 00007fffc8000000 65536 rw--- 0000000000000000 000:00000 [ anon ]
29 00007fffcc000000 65536 rw--- 0000000000000000 000:00000 [ anon ]
30 00007fffd3000000 16384 rw--- 0000000000000000 000:00000 [ anon ]
31 00007fffd4000000 65536 rw--- 0000000000000000 000:00000 [ anon ]
32 00007fffdf124000 4 ----- 0000000000000000 000:00000 [ anon ]
33 00007fffdf125000 8712 rw--- 0000000000000000 000:00000 [ anon ]
34 00007fffdf9a7000 65536 rw-s- 0000000000000000 008:00003 geo_locations.kch
35 00007fffe39a7000 1220 r-x-- 0000000000000000 008:00003 libIMDBFlock.so
36 00007fffe3ad8000 2048 ----- 0000000000131000 008:00003 libIMDBFlock.so
37 00007fffe3cd8000 36 rw--- 0000000000131000 008:00003 libIMDBFlock.so
38 00007fffe3ce1000 1352 r-x-- 0000000000000000 008:00003 libGeoFlock.so
39 00007fffe3e33000 2048 ----- 0000000000152000 008:00003 libGeoFlock.so
40 00007fffe4033000 40 rw--- 0000000000152000 008:00003 libGeoFlock.so
41 00007fffe403d000 65536 rw-s- 0000000000000000 008:00003 id_noneed.kv.kch
42 00007fffe803d000 65536 rw-s- 0000000000000000 008:00003 id_delete.kv.kch
43 00007fffec03d000 65536 rw-s- 0000000000000000 008:00003 id_change.kv.kch
44 00007ffff003d000 44 r-x-- 0000000000000000 008:00001 libnss_files-2.13.so
45 00007ffff0048000 2044 ----- 000000000000b000 008:00001 libnss_files-2.13.so
46 00007ffff0247000 4 r---- 000000000000a000 008:00001 libnss_files-2.13.so
47 00007ffff0248000 4 rw--- 000000000000b000 008:00001 libnss_files-2.13.so
48 00007ffff0249000 4 ----- 0000000000000000 000:00000 [ anon ]
49 00007ffff024a000 8192 rw--- 0000000000000000 000:00000 [ anon ]
50 00007ffff0a4a000 4 ----- 0000000000000000 000:00000 [ anon ]
51 00007ffff0a4b000 8192 rw--- 0000000000000000 000:00000 [ anon ]
52 00007ffff124b000 68 r-x-- 0000000000000000 008:00001 libp11-kit.so.0.0.0
53 00007ffff125c000 2044 ----- 0000000000011000 008:00001 libp11-kit.so.0.0.0
54 00007ffff145b000 4 r---- 0000000000010000 008:00001 libp11-kit.so.0.0.0
55 00007ffff145c000 4 rw--- 0000000000011000 008:00001 libp11-kit.so.0.0.0
56 00007ffff145d000 64 r-x-- 0000000000000000 008:00001 libtasn1.so.3.1.16
57 00007ffff146d000 2044 ----- 0000000000010000 008:00001 libtasn1.so.3.1.16
58 00007ffff166c000 4 r---- 000000000000f000 008:00001 libtasn1.so.3.1.16
59 00007ffff166d000 4 rw--- 0000000000010000 008:00001 libtasn1.so.3.1.16
60 00007ffff166e000 12 r-x-- 0000000000000000 008:00001 libgpg-error.so.0.8.0
61 00007ffff1671000 2044 ----- 0000000000003000 008:00001 libgpg-error.so.0.8.0
62 00007ffff1870000 4 rw--- 0000000000002000 008:00001 libgpg-error.so.0.8.0
63 00007ffff1871000 12 r-x-- 0000000000000000 008:00001 libkeyutils.so.1.4
64 00007ffff1874000 2044 ----- 0000000000003000 008:00001 libkeyutils.so.1.4
65 00007ffff1a73000 4 r---- 0000000000002000 008:00001 libkeyutils.so.1.4
66 00007ffff1a74000 4 rw--- 0000000000003000 008:00001 libkeyutils.so.1.4
67 00007ffff1a75000 32 r-x-- 0000000000000000 008:00001 libkrb5support.so.0.1
68 00007ffff1a7d000 2044 ----- 0000000000008000 008:00001 libkrb5support.so.0.1
69 00007ffff1c7c000 4 r---- 0000000000007000 008:00001 libkrb5support.so.0.1
70 00007ffff1c7d000 4 rw--- 0000000000008000 008:00001 libkrb5support.so.0.1
71 00007ffff1c7e000 12 r-x-- 0000000000000000 008:00001 libcom_err.so.2.1
72 00007ffff1c81000 2044 ----- 0000000000003000 008:00001 libcom_err.so.2.1
73 00007ffff1e80000 4 r---- 0000000000002000 008:00001 libcom_err.so.2.1
74 00007ffff1e81000 4 rw--- 0000000000003000 008:00001 libcom_err.so.2.1
75 00007ffff1e82000 152 r-x-- 0000000000000000 008:00001 libk5crypto.so.3.1
76 00007ffff1ea8000 2048 ----- 0000000000026000 008:00001 libk5crypto.so.3.1
77 00007ffff20a8000 4 r---- 0000000000026000 008:00001 libk5crypto.so.3.1
78 00007ffff20a9000 4 rw--- 0000000000027000 008:00001 libk5crypto.so.3.1
79 00007ffff20aa000 4 rw--- 0000000000000000 000:00000 [ anon ]
80 00007ffff20ab000 804 r-x-- 0000000000000000 008:00001 libkrb5.so.3.3
81 00007ffff2174000 2044 ----- 00000000000c9000 008:00001 libkrb5.so.3.3
82 00007ffff2373000 40 r---- 00000000000c8000 008:00001 libkrb5.so.3.3
83 00007ffff237d000 8 rw--- 00000000000d2000 008:00001 libkrb5.so.3.3
84 00007ffff237f000 740 r-x-- 0000000000000000 008:00001 libgnutls.so.26.22.4
85 00007ffff2438000 2044 ----- 00000000000b9000 008:00001 libgnutls.so.26.22.4
86 00007ffff2637000 24 r---- 00000000000b8000 008:00001 libgnutls.so.26.22.4
87 00007ffff263d000 8 rw--- 00000000000be000 008:00001 libgnutls.so.26.22.4
88 00007ffff263f000 104 r-x-- 0000000000000000 008:00001 libsasl2.so.2.0.25
89 00007ffff2659000 2044 ----- 000000000001a000 008:00001 libsasl2.so.2.0.25
90 00007ffff2858000 4 r---- 0000000000019000 008:00001 libsasl2.so.2.0.25
91 00007ffff2859000 4 rw--- 000000000001a000 008:00001 libsasl2.so.2.0.25
92 00007ffff285a000 76 r-x-- 0000000000000000 008:00001 libresolv-2.13.so
93 00007ffff286d000 2044 ----- 0000000000013000 008:00001 libresolv-2.13.so
94 00007ffff2a6c000 4 r---- 0000000000012000 008:00001 libresolv-2.13.so
95 00007ffff2a6d000 4 rw--- 0000000000013000 008:00001 libresolv-2.13.so
96 00007ffff2a6e000 8 rw--- 0000000000000000 000:00000 [ anon ]
97 00007ffff2a70000 488 r-x-- 0000000000000000 008:00001 libgcrypt.so.11.7.0
98 00007ffff2aea000 2048 ----- 000000000007a000 008:00001 libgcrypt.so.11.7.0
99 00007ffff2cea000 16 rw--- 000000000007a000 008:00001 libgcrypt.so.11.7.0
100 00007ffff2cee000 100 r-x-- 0000000000000000 008:00001 librtmp.so.0
101 00007ffff2d07000 2048 ----- 0000000000019000 008:00001 librtmp.so.0
102 00007ffff2f07000 4 rw--- 0000000000019000 008:00001 librtmp.so.0
103 00007ffff2f08000 240 r-x-- 0000000000000000 008:00001 libgssapi_krb5.so.2.2
104 00007ffff2f44000 2048 ----- 000000000003c000 008:00001 libgssapi_krb5.so.2.2
105 00007ffff3144000 4 r---- 000000000003c000 008:00001 libgssapi_krb5.so.2.2
106 00007ffff3145000 8 rw--- 000000000003d000 008:00001 libgssapi_krb5.so.2.2
107 00007ffff3147000 304 r-x-- 0000000000000000 008:00001 libldap_r-2.4.so.2.8.3
108 00007ffff3193000 2048 ----- 000000000004c000 008:00001 libldap_r-2.4.so.2.8.3
109 00007ffff3393000 8 r---- 000000000004c000 008:00001 libldap_r-2.4.so.2.8.3
110 00007ffff3395000 4 rw--- 000000000004e000 008:00001 libldap_r-2.4.so.2.8.3
111 00007ffff3396000 8 rw--- 0000000000000000 000:00000 [ anon ]
112 00007ffff3398000 56 r-x-- 0000000000000000 008:00001 liblber-2.4.so.2.8.3
113 00007ffff33a6000 2044 ----- 000000000000e000 008:00001 liblber-2.4.so.2.8.3
114 00007ffff35a5000 4 r---- 000000000000d000 008:00001 liblber-2.4.so.2.8.3
115 00007ffff35a6000 4 rw--- 000000000000e000 008:00001 liblber-2.4.so.2.8.3
116 00007ffff35a7000 156 r-x-- 0000000000000000 008:00001 libssh2.so.1.0.1
117 00007ffff35ce000 2048 ----- 0000000000027000 008:00001 libssh2.so.1.0.1
118 00007ffff37ce000 4 r---- 0000000000027000 008:00001 libssh2.so.1.0.1
119 00007ffff37cf000 4 rw--- 0000000000028000 008:00001 libssh2.so.1.0.1
120 00007ffff37d0000 200 r-x-- 0000000000000000 008:00001 libidn.so.11.6.8
121 00007ffff3802000 2048 ----- 0000000000032000 008:00001 libidn.so.11.6.8
122 00007ffff3a02000 4 r---- 0000000000032000 008:00001 libidn.so.11.6.8
123 00007ffff3a03000 4 rw--- 0000000000033000 008:00001 libidn.so.11.6.8
124 00007ffff3a04000 148 r-x-- 0000000000000000 008:00001 libnettle.so.4.3
125 00007ffff3a29000 2048 ----- 0000000000025000 008:00001 libnettle.so.4.3
126 00007ffff3c29000 4 r---- 0000000000025000 008:00001 libnettle.so.4.3
127 00007ffff3c2a000 4 rw--- 0000000000026000 008:00001 libnettle.so.4.3
128 00007ffff3c2b000 1364 r-x-- 0000000000000000 008:00001 libxml2.so.2.8.0
129 00007ffff3d80000 2044 ----- 0000000000155000 008:00001 libxml2.so.2.8.0
130 00007ffff3f7f000 32 r---- 0000000000154000 008:00001 libxml2.so.2.8.0
131 00007ffff3f87000 8 rw--- 000000000015c000 008:00001 libxml2.so.2.8.0
132 00007ffff3f89000 4 rw--- 0000000000000000 000:00000 [ anon ]
133 00007ffff3f8a000 132 r-x-- 0000000000000000 008:00001 liblzma.so.5.0.0
134 00007ffff3fab000 2048 ----- 0000000000021000 008:00001 liblzma.so.5.0.0
135 00007ffff41ab000 4 r---- 0000000000021000 008:00001 liblzma.so.5.0.0
136 00007ffff41ac000 4 rw--- 0000000000022000 008:00001 liblzma.so.5.0.0
137 00007ffff41ad000 16 r-x-- 0000000000000000 008:00001 libattr.so.1.1.0
138 00007ffff41b1000 2044 ----- 0000000000004000 008:00001 libattr.so.1.1.0
139 00007ffff43b0000 4 r---- 0000000000003000 008:00001 libattr.so.1.1.0
140 00007ffff43b1000 4 rw--- 0000000000004000 008:00001 libattr.so.1.1.0
141 00007ffff43b2000 32 r-x-- 0000000000000000 008:00001 libacl.so.1.1.0
142 00007ffff43ba000 2044 ----- 0000000000008000 008:00001 libacl.so.1.1.0
143 00007ffff45b9000 4 r---- 0000000000007000 008:00001 libacl.so.1.1.0
144 00007ffff45ba000 4 rw--- 0000000000008000 008:00001 libacl.so.1.1.0
145 00007ffff45bb000 84 r-x-- 0000000000000000 008:00001 libnsl-2.13.so
146 00007ffff45d0000 2044 ----- 0000000000015000 008:00001 libnsl-2.13.so
147 00007ffff47cf000 4 r---- 0000000000014000 008:00001 libnsl-2.13.so
148 00007ffff47d0000 4 rw--- 0000000000015000 008:00001 libnsl-2.13.so
149 00007ffff47d1000 8 rw--- 0000000000000000 000:00000 [ anon ]
150 00007ffff47d3000 28 r-x-- 0000000000000000 008:00001 librt-2.13.so
151 00007ffff47da000 2044 ----- 0000000000007000 008:00001 librt-2.13.so
152 00007ffff49d9000 4 r---- 0000000000006000 008:00001 librt-2.13.so
153 00007ffff49da000 4 rw--- 0000000000007000 008:00001 librt-2.13.so
154 00007ffff49db000 1752 r-x-- 0000000000000000 008:00001 libcrypto.so.1.0.0
155 00007ffff4b91000 2048 ----- 00000000001b6000 008:00001 libcrypto.so.1.0.0
156 00007ffff4d91000 108 r---- 00000000001b6000 008:00001 libcrypto.so.1.0.0
157 00007ffff4dac000 60 rw--- 00000000001d1000 008:00001 libcrypto.so.1.0.0
158 00007ffff4dbb000 16 rw--- 0000000000000000 000:00000 [ anon ]
159 00007ffff4dbf000 88 r-x-- 0000000000000000 008:00001 libz.so.1.2.7
160 00007ffff4dd5000 2044 ----- 0000000000016000 008:00001 libz.so.1.2.7
161 00007ffff4fd4000 4 r---- 0000000000015000 008:00001 libz.so.1.2.7
162 00007ffff4fd5000 4 rw--- 0000000000016000 008:00001 libz.so.1.2.7
163 00007ffff4fd6000 92 r-x-- 0000000000000000 008:00001 libpthread-2.13.so
164 00007ffff4fed000 2044 ----- 0000000000017000 008:00001 libpthread-2.13.so
165 00007ffff51ec000 4 r---- 0000000000016000 008:00001 libpthread-2.13.so
166 00007ffff51ed000 4 rw--- 0000000000017000 008:00001 libpthread-2.13.so
167 00007ffff51ee000 16 rw--- 0000000000000000 000:00000 [ anon ]
168 00007ffff51f2000 1524 r-x-- 0000000000000000 008:00001 libc-2.13.so
169 00007ffff536f000 2048 ----- 000000000017d000 008:00001 libc-2.13.so
170 00007ffff556f000 16 r---- 000000000017d000 008:00001 libc-2.13.so
171 00007ffff5573000 4 rw--- 0000000000181000 008:00001 libc-2.13.so
172 00007ffff5574000 20 rw--- 0000000000000000 000:00000 [ anon ]
173 00007ffff5579000 84 r-x-- 0000000000000000 008:00001 libgcc_s.so.1
174 00007ffff558e000 2048 ----- 0000000000015000 008:00001 libgcc_s.so.1
175 00007ffff578e000 4 rw--- 0000000000015000 008:00001 libgcc_s.so.1
176 00007ffff578f000 516 r-x-- 0000000000000000 008:00001 libm-2.13.so
177 00007ffff5810000 2044 ----- 0000000000081000 008:00001 libm-2.13.so
178 00007ffff5a0f000 4 r---- 0000000000080000 008:00001 libm-2.13.so
179 00007ffff5a10000 4 rw--- 0000000000081000 008:00001 libm-2.13.so
180 00007ffff5a11000 928 r-x-- 0000000000000000 008:00001 libstdc++.so.6.0.17
181 00007ffff5af9000 2048 ----- 00000000000e8000 008:00001 libstdc++.so.6.0.17
182 00007ffff5cf9000 32 r---- 00000000000e8000 008:00001 libstdc++.so.6.0.17
183 00007ffff5d01000 8 rw--- 00000000000f0000 008:00001 libstdc++.so.6.0.17
184 00007ffff5d03000 84 rw--- 0000000000000000 000:00000 [ anon ]
185 00007ffff5d18000 1016 r-x-- 0000000000000000 008:00001 libkyotocabinet.so.16.13.0
186 00007ffff5e16000 2044 ----- 00000000000fe000 008:00001 libkyotocabinet.so.16.13.0
187 00007ffff6015000 32 rw--- 00000000000fd000 008:00001 libkyotocabinet.so.16.13.0
188 00007ffff601d000 124 r-x-- 0000000000000000 008:00001 libboost_filesystem.so.1.49.0
189 00007ffff603c000 2044 ----- 000000000001f000 008:00001 libboost_filesystem.so.1.49.0
190 00007ffff623b000 8 rw--- 000000000001e000 008:00001 libboost_filesystem.so.1.49.0
191 00007ffff623d000 2868 r-x-- 0000000000000000 008:00001 libmysqlclient.so.18.0.0
192 00007ffff650a000 2044 ----- 00000000002cd000 008:00001 libmysqlclient.so.18.0.0
193 00007ffff6709000 24 r---- 00000000002cc000 008:00001 libmysqlclient.so.18.0.0
194 00007ffff670f000 504 rw--- 00000000002d2000 008:00001 libmysqlclient.so.18.0.0
195 00007ffff678d000 20 rw--- 0000000000000000 000:00000 [ anon ]
196 00007ffff6792000 408 r-x-- 0000000000000000 008:00001 libcurl.so.4.2.0
197 00007ffff67f8000 2044 ----- 0000000000066000 008:00001 libcurl.so.4.2.0
198 00007ffff69f7000 12 r---- 0000000000065000 008:00001 libcurl.so.4.2.0
199 00007ffff69fa000 4 rw--- 0000000000068000 008:00001 libcurl.so.4.2.0
200 00007ffff69fb000 336 r-x-- 0000000000000000 008:00001 libssl.so.1.0.0
201 00007ffff6a4f000 2048 ----- 0000000000054000 008:00001 libssl.so.1.0.0
202 00007ffff6c4f000 12 r---- 0000000000054000 008:00001 libssl.so.1.0.0
203 00007ffff6c52000 28 rw--- 0000000000057000 008:00001 libssl.so.1.0.0
204 00007ffff6c59000 60 r-x-- 0000000000000000 008:00001 libbz2.so.1.0.4
205 00007ffff6c68000 2044 ----- 000000000000f000 008:00001 libbz2.so.1.0.4
206 00007ffff6e67000 4 r---- 000000000000e000 008:00001 libbz2.so.1.0.4
207 00007ffff6e68000 4 rw--- 000000000000f000 008:00001 libbz2.so.1.0.4
208 00007ffff6e69000 604 r-x-- 0000000000000000 008:00001 libarchive.so.12.0.4
209 00007ffff6f00000 2048 ----- 0000000000097000 008:00001 libarchive.so.12.0.4
210 00007ffff7100000 8 r---- 0000000000097000 008:00001 libarchive.so.12.0.4
211 00007ffff7102000 8 rw--- 0000000000099000 008:00001 libarchive.so.12.0.4
212 00007ffff7104000 4 rw--- 0000000000000000 000:00000 [ anon ]
213 00007ffff7105000 12 r-x-- 0000000000000000 008:00001 libboost_system.so.1.49.0
214 00007ffff7108000 2044 ----- 0000000000003000 008:00001 libboost_system.so.1.49.0
215 00007ffff7307000 4 rw--- 0000000000002000 008:00001 libboost_system.so.1.49.0
216 00007ffff7308000 60 r-x-- 0000000000000000 008:00001 libboost_date_time.so.1.49.0
217 00007ffff7317000 2044 ----- 000000000000f000 008:00001 libboost_date_time.so.1.49.0
218 00007ffff7516000 8 rw--- 000000000000e000 008:00001 libboost_date_time.so.1.49.0
219 00007ffff7518000 8 r-x-- 0000000000000000 008:00001 libdl-2.13.so
220 00007ffff751a000 2048 ----- 0000000000002000 008:00001 libdl-2.13.so
221 00007ffff771a000 4 r---- 0000000000002000 008:00001 libdl-2.13.so
222 00007ffff771b000 4 rw--- 0000000000003000 008:00001 libdl-2.13.so
223 00007ffff771c000 104 r-x-- 0000000000000000 008:00001 libboost_thread.so.1.49.0
224 00007ffff7736000 2048 ----- 000000000001a000 008:00001 libboost_thread.so.1.49.0
225 00007ffff7936000 8 rw--- 000000000001a000 008:00001 libboost_thread.so.1.49.0
226 00007ffff7938000 256 r-x-- 0000000000000000 008:00001 liblog4cpp.so.5.0.5
227 00007ffff7978000 2048 ----- 0000000000040000 008:00001 liblog4cpp.so.5.0.5
228 00007ffff7b78000 12 rw--- 0000000000040000 008:00001 liblog4cpp.so.5.0.5
229 00007ffff7b7b000 376 r-x-- 0000000000000000 008:00001 libboost_program_options.so.1.49.0
230 00007ffff7bd9000 2048 ----- 000000000005e000 008:00001 libboost_program_options.so.1.49.0
231 00007ffff7dd9000 16 rw--- 000000000005e000 008:00001 libboost_program_options.so.1.49.0
232 00007ffff7ddd000 128 r-x-- 0000000000000000 008:00001 ld-2.13.so
233 00007ffff7e22000 264 rw--- 0000000000000000 000:00000 [ anon ]
234 00007ffff7e64000 1500 r---- 0000000000000000 008:00001 locale-archive
235 00007ffff7fdb000 88 rw--- 0000000000000000 000:00000 [ anon ]
236 00007ffff7ff1000 28 r--s- 0000000000000000 008:00001 gconv-modules.cache
237 00007ffff7ff8000 12 rw--- 0000000000000000 000:00000 [ anon ]
238 00007ffff7ffb000 4 r-x-- 0000000000000000 000:00000 [ anon ]
239 00007ffff7ffc000 4 r---- 000000000001f000 008:00001 ld-2.13.so
240 00007ffff7ffd000 4 rw--- 0000000000020000 008:00001 ld-2.13.so
241 00007ffff7ffe000 4 rw--- 0000000000000000 000:00000 [ anon ]
242 00007ffffffde000 132 rw--- 0000000000000000 000:00000 [ stack ]
243 ffffffffff600000 4 r-x-- 0000000000000000 000:00000 [ anon ]
244 mapped: 3588968K writeable/private: 3141696K shared: 262172K
可以看到程序总共使用了3G多的内存，有点恐怖哈。。。。
再分析一下，可以看到大部分内存都是被类似“00007fff50000000 131072 rw--- 0000000000000000 000:00000 [ anon ]” 这样的情况给占用的，这里面的“anon”是啥呢？
“应该是叫匿名的地址，一般在堆里面分配？”http://bbs.chinaunix.net/thread-2065212-1-1.html
也许就是anonymous的堆栈吧。。。。