{"id":49454,"date":"2026-11-10T09:12:32","date_gmt":"2026-11-10T00:12:32","guid":{"rendered":"https:\/\/jore2.com\/?p=49454"},"modified":"2026-11-10T09:12:32","modified_gmt":"2026-11-10T00:12:32","slug":"tips-23367-what-is-malloc-doing-anyway","status":"publish","type":"post","link":"https:\/\/jore2.com\/?p=49454","title":{"rendered":"Ben Andrew, malloc\uc758 \ub0b4\ubd80 \uba54\ubaa8\ub9ac \uad00\ub9ac \uad6c\uc870\uc640 \uc2dc\uc2a4\ud15c \ud638\ucd9c \ube44\uc6a9\uc744 \uc0c1\uc138 \ubd84\uc11d"},"content":{"rendered":"<div class=\"jore2-editor-byline\">\n<p><strong>\uc774\uac00\uc740<\/strong><\/p>\n<\/div>\n<p>\uac1c\ubc1c\uc790 Ben Andrew\uac00 \uc790\uc2e0\uc758 \uc6f9\uc0ac\uc774\ud2b8\ub97c \ud1b5\ud574 malloc \ud568\uc218\uc758 \uc2e4\uc81c \ub3d9\uc791 \uc6d0\ub9ac\ub97c \ud30c\ud5e4\uce58\ub294 \uae00\uc744 \uac8c\uc2dc\ud588\uc2b5\ub2c8\ub2e4. \ub9ce\uc740 \ud504\ub85c\uadf8\ub798\uba38\uac00 \uba54\ubaa8\ub9ac \ud560\ub2f9 \uc694\uccad \uc2dc \ubc18\ud658\ub418\ub294 \ud3ec\uc778\ud130\ub9cc \uc2e0\uacbd \uc4f0\uc9c0\ub9cc, \uadf8 \uc774\uba74\uc5d0\uc11c\ub294 \ubcf5\uc7a1\ud55c \uc2dc\uc2a4\ud15c \uc790\uc6d0 \uad00\ub9ac\uac00 \uc774\ub8e8\uc5b4\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>Andrew\ub294 \uc0ac\uc6a9\uc790\uac00 malloc\uc73c\ub85c \ud2b9\uc815 \ud06c\uae30\uc758 \uba54\ubaa8\ub9ac\ub97c \uc694\uccad\ud558\uba74 \uc5f0\uc18d\ub41c \ubc14\uc774\ud2b8 \ube14\ub85d\uc774 \uc0dd\uc131\ub418\ub294 \uac83\ucc98\ub7fc \ubcf4\uc774\uc9c0\ub9cc, \uc774\ub294 \uc0ac\uc6a9 \uacf5\uac04 \ud504\ub85c\uadf8\ub7a8\uc774 \ucee4\ub110\uc5d0 \uc2dc\uc2a4\ud15c \ud638\ucd9c\uc744 \ubcf4\ub0b4\ub294 \uacfc\uc815\uc774\ub77c\uace0 \uc124\uba85\ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ub9e4\ubc88 \uc791\uc740 \ube14\ub85d\uc744 \ud560\ub2f9\ud560 \ub54c\ub9c8\ub2e4 \uc2dc\uc2a4\ud15c \ud638\ucd9c\uc744 \ubc18\ubcf5\ud558\uae30\uc5d0\ub294 \ube44\uc6a9\uc774 \ub108\ubb34 \ud07d\ub2c8\ub2e4.<\/p>\n<p>\uadf8\uac00 \uc81c\uc2dc\ud55c \uce21\uc815 \ub370\uc774\ud130\uc5d0 \ub530\ub974\uba74 \ube48 \uc2dc\uc2a4\ud15c \ud638\ucd9c \ud558\ub098\uc5d0\ub9cc \uc57d 575\ub098\ub178\ucd08\uac00 \uc18c\uc694\ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c GNU libc \uac19\uc740 \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub294 \ubc31\uadf8\ub77c\uc6b4\ub4dc\uc5d0\uc11c \uc7a5\ubd80 \uae30\ub85d \uc791\uc5c5\uc744 \uc218\ud589\ud558\uc5ec \ud6a8\uc728\uc131\uc744 \ub192\uc785\ub2c8\ub2e4. \uc774\ub294 \uc131\ub2a5 \ucd5c\uc801\ud654\ub97c \uc704\ud55c \ud544\uc218\uc801\uc778 \ub2e8\uacc4\ub85c \uc791\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n<p>strace \ub3c4\uad6c\ub97c \uc774\uc6a9\ud55c \uc2e4\ud5d8 \uacb0\uacfc, malloc(16)\uc744 \ucc9c \ubc88 \ud638\ucd9c\ud558\ub294 \ub8e8\ud504\uc5d0\uc11c\ub3c4 brk \uc2dc\uc2a4\ud15c \ud638\ucd9c\uc740 \ub2e8 \ub450 \ubc88\ub9cc \ubc1c\uc0dd\ud588\uc2b5\ub2c8\ub2e4. \uccab \ubc88\uc9f8 \ud638\ucd9c\uc740 \ud504\ub85c\uadf8\ub7a8 \ube0c\ub808\uc774\ud06c \uc704\uce58\ub97c \ud655\uc778\ud558\uace0, \ub450 \ubc88\uc9f8\ub294 \ud799 \uc601\uc5ed\uc744 132 KiB\ub9cc\ud07c \ud655\uc7a5\ud569\ub2c8\ub2e4. \ub098\uba38\uc9c0 999\ubc88\uc758 \ud560\ub2f9\uc740 \uc774\ubbf8 \ud655\ubcf4\ub41c \uba54\ubaa8\ub9ac \ub0b4\uc5d0\uc11c \ucc98\ub9ac\ub429\ub2c8\ub2e4.<\/p>\n<p>\ud504\ub85c\uc138\uc2a4\uc758 \uc8fc\uc18c \uacf5\uac04\uc740 \ud14d\uc2a4\ud2b8, \ub370\uc774\ud130, BSS \ub4f1 \uc5ec\ub7ec \uc601\uc5ed\uc73c\ub85c \ub098\ub269\ub2c8\ub2e4. malloc\uc740 \ud799 \uc601\uc5ed\uc744 \uc131\uc7a5\uc2dc\ud0a4\uba70 \ud504\ub85c\uadf8\ub7a8 \ube0c\ub808\uc774\ud06c \uc8fc\uc18c\ub97c \uc704\ub85c \uc774\ub3d9\uc2dc\ud0b5\ub2c8\ub2e4. brk\ub294 \uc9c0\uc815\ub41c \uc8fc\uc18c\ub85c \ube0c\ub808\uc774\ud06c\ub97c \uc124\uc815\ud558\ub294 \uc2dc\uc2a4\ud15c \ud638\ucd9c\uc774\uba70, sbrk\ub294 \ub378\ud0c0 \uac12\uc744 \ubc1b\uc544 \uc774\ub97c \uc870\uc815\ud558\ub294 \ud3b8\uc758 \ub798\ud37c \ud568\uc218\uc785\ub2c8\ub2e4.<\/p>\n<p>\ud574\ucee4 \ub274\uc2a4 \ucee4\ubba4\ub2c8\ud2f0\uc5d0\uc11c\ub294 \uc774 \uae00\uc5d0 \ub300\ud55c \ub2e4\uc591\ud55c \ubc18\uc751\uc774 \uc774\uc5b4\uc84c\uc2b5\ub2c8\ub2e4. \ud55c \uc774\uc6a9\uc790\ub294 \uc2a4\ud0dd \uc804\uc6a9 \uc5b8\uc5b4\uc758 \ub9e4\ub825\ub3c4\ub97c \uc5b8\uae09\ud558\uba70 \ud799 \ud560\ub2f9 \ucd94\uc0c1\ud654\uc758 \ubcf5\uc7a1\uc131\uc744 \uc9c0\uc801\ud588\uc2b5\ub2c8\ub2e4. \ub2e4\ub978 \uc774\ub4e4\uc740 \ud604\ub300\uc801\uc778 \ud560\ub2f9\uc790\uac00 mmap\uc744 \ud65c\uc6a9\ud558\ubbc0\ub85c brk \uae30\ubc18 \uc124\uba85\uc774 \uad6c\uc2dd\uc77c \uc218 \uc788\ub2e4\uace0 \ubc18\ub860\uc744 \uc81c\uae30\ud558\uae30\ub3c4 \ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<p>jemalloc\uc774\ub098 mimalloc \uac19\uc740 \ucd5c\uc2e0 \uad6c\ud604\uccb4\ub294 \uc774\ub7ec\ud55c \uc804\ud1b5\uc801\uc778 \ubc29\uc2dd\uacfc \ucc28\uc774\uac00 \uc788\uc744 \uc218 \uc788\ub2e4\ub294 \uc758\uacac\ub3c4 \uac1c\uc9c4\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \ub2e4\ub9cc Andrew\uc758 \uae00\uc740 glibc\uc758 \uae30\ubcf8 \ub3d9\uc791\uc744 \uc774\ud574\ud558\ub294 \ub370 \uc911\uc694\ud55c \ucd9c\ubc1c\uc810\uc774 \ub429\ub2c8\ub2e4. \uc800\uc218\uc900 \uba54\ubaa8\ub9ac \uad00\ub9ac\uc758 \uae30\ucd08\ub97c \ub2e4\uc9c0\ub294 \uc790\ub8cc\ub85c\uc11c \uac00\uce58\uac00 \uc778\uc815\ubc1b\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uac1c\ubc1c\uc790 Ben Andrew\uac00 C \uc5b8\uc5b4\uc758 malloc \ud568\uc218\uac00 \uc2e4\uc81c\ub85c \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0 \uae30\uc220\uc801 \uad00\uc810\uc5d0\uc11c \ud574\ubd80\ud588\uc2b5\ub2c8\ub2e4. \uadf8\ub294 \ub2e8\uc21c\ud55c \uc778\ud130\ud398\uc774\uc2a4 \uc774\uba74\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \ucee4\ub110\uacfc\uc758 \uc0c1\ud638\uc791\uc6a9\uacfc \ud799 \ud655\uc7a5 \uacfc\uc815\uc744 \uad6c\uccb4\uc801\uc73c\ub85c \uc124\uba85\ud558\uba70 \ucee4\ubba4\ub2c8\ud2f0\uc758 \uc8fc\ubaa9\uc744 \ubc1b\uc558\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"author":4,"featured_media":49453,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jore2_quality_policy":"people-first-v2","footnotes":""},"categories":[387],"tags":[32773,32771,32774,1358,32772],"class_list":["post-49454","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-it","tag-glibc","tag-malloc","tag-32774","tag-1358","tag-32772"],"featured_image_urls":{"full":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card.png",1200,628,false],"thumbnail":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-150x150.png",150,150,true],"medium":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-300x157.png",300,157,true],"medium_large":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-768x402.png",640,335,true],"large":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-1024x536.png",640,335,true],"1536x1536":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card.png",1200,628,false],"2048x2048":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card.png",1200,628,false],"morenews-large":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-825x575.png",825,575,true],"morenews-medium":["https:\/\/jore2.com\/wp-content\/uploads\/2026\/11\/malloc-card-590x410.png",590,410,true]},"author_info":{"info":["\uc774\uac00\uc740"]},"category_info":"<a 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