{"id":43236,"date":"2024-12-01T08:48:13","date_gmt":"2024-12-01T00:48:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/43236\/"},"modified":"2024-12-01T08:48:13","modified_gmt":"2024-12-01T00:48:13","slug":"golang%e4%bd%bf%e7%94%a8cgo%e8%b0%83%e7%94%a8c%e5%ba%93%e6%97%b6%e6%9c%aa%e6%a3%80%e6%b5%8b%e5%88%b0sanitizer-leak","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/43236\/","title":{"rendered":"golang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> golang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak<\/span><\/p>\n

golang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak<\/h1>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-05-01 09:57:42<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

Golang<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300agolang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6458\u8981<\/h1>\n

\u4e4b\u524d\u6211\u4f7f\u7528\u8fc7 clang-3.8.1\uff0c\u4f46\u5728\u4f7f\u7528 addresssanitizer \u65f6\uff0csanitizer \u5d29\u6e83\u4e86\u3002\u800c\u4e14leaksanitizer\u6839\u672c\u4e0d\u8d77\u4f5c\u7528\u3002<\/p>\n

\u7136\u540e\u6211\u5c1d\u8bd5\u4f7f\u7528clang-llvm-10.0\uff0caddresssanitizer\u53ef\u4ee5\u68c0\u6d4b\u5230\u5730\u5740\u95ee\u9898\u5e76\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n

\u4f46\u662fgolang\u4f7f\u7528cgo\u8c03\u7528c\u65f6\u65e0\u6cd5\u68c0\u6d4b\u5230\u6cc4\u6f0f\u95ee\u9898<\/strong>\u5f53golang\u4f7f\u7528cgo\u65f6\u662f\u5426\u53ef\u4ee5\u4f7f\u7528leak-sanitizer\u6765\u68c0\u6d4bc\/c++\u5e93\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\uff1f p> <\/p>\n

\u793a\u4f8b<\/h1>\n
    \n
  • cgo-sanitizer.go\uff1a\u6309\u9884\u671f\u68c0\u6d4b\u5230\u5730\u5740\u95ee\u9898\u3002<\/li>\n<\/ul>\n
    package main\n\n\/\/ #include <stdlib.h>\n\/\/\n\/\/ int test()\n\/\/ {\n\/\/   int *p = (int *)malloc(10 * sizeof(int));\n\/\/   free(p);\n\/\/   p[1] = 42;\n\/\/   return p[1];\n\/\/ }\nimport \"c\"\nimport \"fmt\"\n\nfunc main() {\n  fmt.println(int(c.test()))\n  \/\/ output: 42\n}\n<\/pre>\n
      \n
    • \u8f93\u51fa<\/li>\n<\/ul>\n
      [root@380c7770b175 cplusplus]# cc=\"clang\" cgo_cflags=\"-o0 -g -fsanitize=address\" cgo_ldflags=\"-fsanitize=address\" go run cgo-sanitizer.go\n=================================================================\n==25680==error: addresssanitizer: heap-use-after-free on address 0x604000000014 at pc 0x00000054fc2d bp 0x7ffd96a943b0 sp 0x7ffd96a943a8\nwrite of size 4 at 0x604000000014 thread t0\n    #0 0x54fc2c in test (\/tmp\/go-build237509829\/b001\/exe\/cgo-sanitizer+0x54fc2c)\n    #1 0x54fcc1 in _cgo_a3187169dba5_cfunc_test (\/tmp\/go-build237509829\/b001\/exe\/cgo-sanitizer+0x54fcc1)\n    #2 0x5159df  (\/tmp\/go-build237509829\/b001\/exe\/cgo-sanitizer+0x5159df)<\/pre>\n
        \n
      • cgo-sanitizer-leak.go\uff1a\u672a\u68c0\u6d4b\u5230\u6cc4\u6f0f\u95ee\u9898\u3002 \u4e3a\u4ec0\u4e48<\/strong>\uff1f<\/li>\n<\/ul>\n
        package main\n\n\/\/ #include <stdlib.h>\n\/\/\n\/\/ int *p;\n\/\/ int test()\n\/\/ {\n\/\/   p = (int *)malloc(10 * sizeof(int));\n\/\/   p = 0;\n\/\/   return 52;\n\/\/ }\nimport \"c\"\nimport \"fmt\"\n\nfunc main() {\n  fmt.println(int(c.test()))\n  \/\/ output: 52\n}\n<\/pre>\n
        [root@380c7770b175 cplusplus]# cc=\"clang\" cgo_cflags=\"-o0 -g -fsanitize=leak\" cgo_ldflags=\"-fsanitize=address\" go run cgo-sanitizer-leak.go\n52\n<\/pre>\n
        \u73af\u5883<\/h1>\n
        [root@380c7770b175 cplusplus]# cat \/proc\/version\nLinux version 3.10.0-493.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-9) (GCC) ) #1 SMP Tue Aug 16 11:45:26 EDT 2016\n\n[root@380c7770b175 cplusplus]# clang -v\nclang version 10.0.0\nTarget: x86_64-unknown-linux-gnu\nThread model: posix\nInstalledDir: \/usr\/local\/llvm-10.0\/bin\nFound candidate GCC installation: \/usr\/lib\/gcc\/x86_64-redhat-linux\/4.8.2\nFound candidate GCC installation: \/usr\/lib\/gcc\/x86_64-redhat-linux\/4.8.5\nSelected GCC installation: \/usr\/lib\/gcc\/x86_64-redhat-linux\/4.8.5\nCandidate multilib: .;@m64\nCandidate multilib: 32;@m32\nSelected multilib: .;@m64\n\n[root@380c7770b175 cplusplus]# go version\ngo version go1.13.6 linux\/amd64\n<\/pre>\n
        \u539f\u59cb\u95ee\u9898<\/h1>\n
        https:\/\/github.com\/google\/sanitizers\/issues\/1223<\/p>\n
         <\/p>\n
        \u89e3\u51b3\u65b9\u6848<\/h2>\n
         <\/p>\n
        \u6211\u901a\u8fc7\u5728\u8fdb\u7a0b\u9000\u51fa\u65f6\u663e\u5f0f\u8c03\u7528 __lsan_do_leak_check()<\/code> \u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
        __lsan_do_leak_check() \u5728 <\/p>\n
         \u4e2d\u58f0\u660e <\/p>\n
        \u6211\u731c\u8fd9\u4e0ec-main\u542f\u52a8\u673a\u5236\u6709\u5173\uff0c\u5e76\u4e14__lsan_do_leak_check()\u6ca1\u6709\u4e3agolang\u542f\u52a8\u6ce8\u518c\u3002<\/p>\n
        \u6b22\u8fce\u4efb\u4f55\u80fd\u591f\u6301\u7eed\u6316\u6398\u5b83\u7684\u4eba\u3002<\/p>\n
        @shawn \u662f\u6b63\u786e\u7684\uff0c\u5982\u679c\u4f60\u7684\u4e3b\u7a0b\u5e8f\u662f\u7528 go \u7f16\u5199\u7684\uff0c\u4f60\u9700\u8981\u624b\u52a8\u8c03\u7528 __lsan_do_leak_check \u3002\u5982\u679c\u60a8\u7684 main \u662f\u7528 c\/c++ \u7f16\u5199\u7684\uff0c\u5e76\u4e14 go \u4f5c\u4e3a\u5e93\u8c03\u7528\uff0c\u90a3\u4e48\u5c31\u4e0d\u9700\u8981\u5b83\u3002<\/p>\n
        \u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50<\/p>\n
        package main\n\n\/\/ #include <stdio.h>\n\/\/ #include <stdlib.h>\n\/\/\n\/\/ void __lsan_do_leak_check(void);\n\/\/\n\/\/ void leak_a_bit(void)\n\/\/ {\n\/\/     char* p = malloc(2000);\n\/\/     printf(\"%p\\n\", p);\n\/\/ }\nimport \"c\"\n\nfunc main() {\n        c.leak_a_bit()\n\n        c.__lsan_do_leak_check()\n}<\/pre>\n
        \u8fd9\u6837\u7f16\u8bd1\u5e76\u8fd0\u884c<\/p>\n
        $ CC=clang CGO_ENABLED=1 CGO_LDFLAGS='-fsanitize=address' CGO_CFLAGS='-fsanitize=address' go build -o main\n\n$ .\/main<\/pre>\n
        \u4eca\u5929\u5173\u4e8e\u300agolang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u5f53\u524d\u4f4d\u7f6e\uff1a > > > > golang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak golang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak \u6765\u6e90\uff1astackoverflow 2024-05-01 09:57:42 0\u6d4f\u89c8 \u6536\u85cf Golang\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300agolang\u4f7f\u7528cgo\u8c03\u7528c\u5e93\u65f6\u672a\u68c0\u6d4b\u5230sanitizer-leak\u300b\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01 \u95ee\u9898\u5185\u5bb9 \u6458\u8981 \u4e4b\u524d\u6211\u4f7f\u7528\u8fc7 clang-3.8.1\uff0c\u4f46\u5728\u4f7f\u7528 addresssanitizer \u65f6\uff0csanitizer \u5d29\u6e83\u4e86\u3002\u800c\u4e14leaksanitizer\u6839\u672c\u4e0d\u8d77\u4f5c\u7528\u3002 \u7136\u540e\u6211\u5c1d\u8bd5\u4f7f\u7528clang-llvm-10.0\uff0caddresssanitizer\u53ef\u4ee5\u68c0\u6d4b\u5230\u5730\u5740\u95ee\u9898\u5e76\u6b63\u5e38\u5de5\u4f5c\u3002 \u4f46\u662fgolang\u4f7f\u7528cgo\u8c03\u7528c\u65f6\u65e0\u6cd5\u68c0\u6d4b\u5230\u6cc4\u6f0f\u95ee\u9898\u5f53golang\u4f7f\u7528cgo\u65f6\u662f\u5426\u53ef\u4ee5\u4f7f\u7528leak-sanitizer\u6765\u68c0\u6d4bc\/c++\u5e93\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\uff1f p> \u793a\u4f8b cgo-sanitizer.go\uff1a\u6309\u9884\u671f\u68c0\u6d4b\u5230\u5730\u5740\u95ee\u9898\u3002 package main \/\/ #include <stdlib.h> \/\/ \/\/ int test() \/\/ { \/\/ int *p = (int *)malloc(10 * sizeof(int)); \/\/ free(p); \/\/ p[1] = 42; \/\/ return p[1]; \/\/ } […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-43236","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=43236"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43236\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=43236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=43236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=43236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}