{"id":281,"date":"2012-02-25T16:01:34","date_gmt":"2012-02-25T21:01:34","guid":{"rendered":"http:\/\/zhanxw.com\/blog\/?p=281"},"modified":"2012-02-25T16:01:34","modified_gmt":"2012-02-25T21:01:34","slug":"valgrind-%e6%9f%a5%e5%86%85%e5%ad%98%e9%94%99%e8%af%af%e7%9a%84%e5%88%a9%e5%99%a8","status":"publish","type":"post","link":"https:\/\/zhanxw.com\/blog\/2012\/02\/valgrind-%e6%9f%a5%e5%86%85%e5%ad%98%e9%94%99%e8%af%af%e7%9a%84%e5%88%a9%e5%99%a8\/","title":{"rendered":"Valgrind \u67e5\u5185\u5b58\u9519\u8bef\u7684\u5229\u5668"},"content":{"rendered":"

Valgrind – a cool tool to check memory related problems<\/p>\n

Valgrind\u662f\u975e\u5e38\u6709\u7528\u7684\u68c0\u67e5\u5185\u5b58\u76f8\u5173\u95ee\u9898\u7684\u5de5\u5177\u3002\u6bd4\u5982\uff1a \u5185\u5b58\u6cc4\u6f0f\uff0cdouble free memory\uff0c\u5185\u5b58\u975e\u6cd5\u8bbf\u95ee\u3002\u57fa\u672c\u4e0aSegmentation fault\u90fd\u80fd\u7528Valgrind\u67e5\u51fa\u6765\u3002\u6211\u521a\u521a\u67e5\u51fa\u4e86\u4e00\u4e2a\u5f88\u5201\u94bb\u7684bug\uff0c\u5728\u627ebug\u7684\u8fc7\u7a0b\u4e2d\u53d1\u73b0valgrind\u975e\u5e38\u6709\u7528\uff0c\u4f46\u8981\u7528\u597d\uff0c\u8fd8\u9700\u8981\u70b9\u6280\u5de7\u3002<\/p>\n

\u5148\u63cf\u8ff0\u4e00\u4e0b\u95ee\u9898\uff1a<\/p>\n

\u81ea\u5df1\u7684\u7a0b\u5e8f\u603b\u662fSegmentation Fault\u3002\u6211\u5148\u7528Valgrind\u8fd0\u884c\uff0c\u91cd\u8981\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n


\n==11060== Invalid write of size 8
\n==11060== at 0x44FF07: FileReader::FileReader() (in \/net\/nfsb\/dumbo\/home\/zhanxw\/smallTool\/BamPileup)
\n==11060== by 0x410D05: BufferedReader::BufferedReader(char const*, int) (IO.h:232)
\n==11060== by 0x41126C: LineReader::LineReader(char const*) (IO.h:332)
\n==11060== by 0x41047A: RangeList::addRangeFile(char const*) (RangeList.cpp:128)
\n==11060== by 0x405B28: main (BamPileup.cpp:258)
\n==11060== Address 0x75fc2e8 is 0 bytes after a block of size 40 alloc'd
\n==11060== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261)
\n==11060== by 0x411252: LineReader::LineReader(char const*) (IO.h:332)
\n==11060== by 0x41047A: RangeList::addRangeFile(char const*) (RangeList.cpp:128)
\n==11060== by 0x405B28: main (BamPileup.cpp:258)
\n==11060==
\n<\/code><\/p>\n

\u56e0\u4e3a\u6211\u7684BufferedReader\u5305\u542bFileReader\u7c7b\uff0c\u6211\u6700\u5f00\u59cb\u7684\u51e0\u4e2a\u601d\u8def\uff1a
\n1. \u81ea\u5df1\u7684code\u6709bug
\nBufferedReader \u548c FileReader\u90fd\u662f\u81ea\u5df1\u5199\u7684\uff0c\u7528\u8fc7\u5f88\u591a\u6b21\u6ca1\u6709\u95ee\u9898\uff0c\u8fd9\u6b21\u51fa\u73b0Valgrind\u62a5\u9519\u5728IO.h:232\uff0c\u56e0\u6b64\u53cd\u590d\u68c0\u67e5\u4e86\u90a3\u6bb5\u4ee3\u7801\u3002
\n2. \u6000\u7591link\u6709\u95ee\u9898\u7684library
\n\u91cd\u65b0\u7f16\u8bd1\u6574\u4e2acode\u591a\u6b21\u3002<\/p>\n

\u4f46\u662f\u95ee\u9898\u4f9d\u65e7\uff0c\u540e\u6765\u7ed9Valgind \u8fd9\u51e0\u4e2a\u53c2\u6570 –show-reachable=yes –leak-check=full \uff0c\u518d\u91cd\u65b0\u8fd0\u884c\uff1a
\n
\n==11908== Invalid write of size 8
\n==11908== at 0x4584BB: FileReader::FileReader() (BgzfFileTypeRecovery.cpp:239)
\n==11908== by 0x4106B5: BufferedReader::BufferedReader(char const*, int) (IO.h:232)
\n==11908== by 0x410C28: LineReader::LineReader(char const*) (IO.h:332)
\n==11908== by 0x40FE2A: RangeList::addRangeFile(char const*) (RangeList.cpp:128)
\n==11908== by 0x4054D8: main (BamPileup.cpp:258)
\n==11908== Address 0x75fc2e8 is 0 bytes after a block of size 40 alloc'd
\n==11908== at 0x4C27CC1: operator new(unsigned long) (vg_replace_malloc.c:261)
\n==11908== by 0x410C0E: LineReader::LineReader(char const*) (IO.h:332)
\n==11908== by 0x40FE2A: RangeList::addRangeFile(char const*) (RangeList.cpp:128)
\n==11908== by 0x4054D8: main (BamPileup.cpp:258)
\n==11908==
\n<\/code>
\n\u8fd9\u6b21\u4e00\u4e0b\u53d1\u73b0\u539f\u6765\u662f\u6211link\u522b\u4eba\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u6211\u4eec\u90fd\u6709\u4e00\u4e2a\u7c7b\u53eb\u505aFileReader\uff0c\u7f16\u8bd1\u5668\u628a\u9519\u8bef\u7684FileReader\u4ee3\u7801\u94fe\u63a5\u7ed9\u6211\uff0c\u6240\u4ee5\u628a\u7a0b\u5e8f\u641e\u5d29\u6e83\u4e86\u3002<\/p>\n

\u603b\u7ed3\u4e00\u4e0b\uff0c\u8981\u662f\uff1a
\n1. \u81ea\u5df1\u4e00\u4e0b\u5b50\u5c31\u7528\u5230Valgrind\u7684\u8fd9\u4e9b\u53c2\u6570
\n2. \u94fe\u63a5\u522b\u4eba\u7684\u4ee3\u7801\u524d\u5148\u6d4b\u8bd5\u4e00\u4e0b\uff0c\u7136\u540e\u5c31\u80fd\u628a\u95ee\u9898\u7684\u539f\u56e0\u5f52\u4e8e\u65b0\u52a0\u5165\u7684\u4ee3\u7801<\/p>\n

\u53ef\u60dc\u6ca1\u90a3\u4e48\u591a\u201c\u8981\u662f\u201d\uff0c\u4ee5\u6b64\u6587\u7eaa\u5ff5\u4e00\u4e0b\u521a\u521a\u8fc7\u53bb\u76843\u4e2a\u5c0f\u65f6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Valgrind – a cool tool to check memory related problems Valgrind\u662f\u975e\u5e38\u6709\u7528\u7684\u68c0\u67e5\u5185\u5b58\u76f8\u5173\u95ee\u9898\u7684\u5de5\u5177\u3002\u6bd4\u5982\uff1a \u5185\u5b58\u6cc4\u6f0f\uff0cdouble free memory\uff0c\u5185\u5b58\u975e\u6cd5\u8bbf\u95ee\u3002\u57fa\u672c\u4e0aSegmentation fault\u90fd\u80fd\u7528Valgrind\u67e5\u51fa\u6765\u3002\u6211\u521a\u521a\u67e5\u51fa\u4e86\u4e00\u4e2a\u5f88\u5201\u94bb\u7684bug\uff0c\u5728\u627ebug\u7684\u8fc7\u7a0b\u4e2d\u53d1\u73b0valgrind\u975e\u5e38\u6709\u7528\uff0c\u4f46\u8981\u7528\u597d\uff0c\u8fd8\u9700\u8981\u70b9\u6280\u5de7\u3002 \u5148\u63cf\u8ff0\u4e00\u4e0b\u95ee\u9898\uff1a \u81ea\u5df1\u7684\u7a0b\u5e8f\u603b\u662fSegmentation Fault\u3002\u6211\u5148\u7528Valgrind\u8fd0\u884c\uff0c\u91cd\u8981\u7ed3\u679c\u5982\u4e0b\uff1a ==11060== Invalid write of size 8 ==11060== at 0x44FF07: FileReader::FileReader() (in \/net\/nfsb\/dumbo\/home\/zhanxw\/smallTool\/BamPileup) ==11060== by 0x410D05: BufferedReader::BufferedReader(char const*, int) (IO.h:232) ==11060== by 0x41126C: LineReader::LineReader(char const*) (IO.h:332) ==11060== by 0x41047A: RangeList::addRangeFile(char const*) (RangeList.cpp:128) ==11060== by 0x405B28: main (BamPileup.cpp:258) ==11060== […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[55,78,77],"class_list":["post-281","post","type-post","status-publish","format-standard","hentry","category-code","tag-c","tag-memory","tag-valgrind"],"_links":{"self":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts\/281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/comments?post=281"}],"version-history":[{"count":0,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts\/281\/revisions"}],"wp:attachment":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/media?parent=281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/categories?post=281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/tags?post=281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}