{"id":2615,"date":"2020-11-21T07:05:02","date_gmt":"2020-11-20T22:05:02","guid":{"rendered":"http:\/\/43.203.250.216\/?p=2615"},"modified":"2020-12-30T11:45:14","modified_gmt":"2020-12-30T02:45:14","slug":"gdb%ec%97%90%ec%84%9c-%ec%9d%b8%ec%8a%a4%ed%84%b4%ec%8a%a4%ec%9d%98-%ec%8b%a4%ec%a0%9c-%ed%83%80%ec%9e%85-%ed%91%9c%ec%8b%9c%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/litcoder.com\/?p=2615","title":{"rendered":"GDB\uc5d0\uc11c \uc778\uc2a4\ud134\uc2a4\uc758 \uc2e4\uc81c \ud0c0\uc785 \ud45c\uc2dc\ud558\uae30"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Base class\ub85c \ubd80\ud130 \uc0c1\uc18d \ubc1b\uc740 Derived class\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c Base class \ud3ec\uc778\ud130\uc5d0 \ub123\uc73c\uba74 GDB\uc5d0\uc11c \ud0c0\uc785\uc774 \uc81c\ub300\ub85c \ud45c\uc2dc\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc774 \ub54c\ub294 &#8216;set print object on&#8217;\uc744 \uc124\uc815\ud574\uc11c GDB\uc758 ptype &lt;var&gt; \uba85\ub839 \uacb0\uacfc\uc5d0 \ud574\ub2f9 \uc778\uc2a4\ud134\uc2a4\uc758 \uc2e4\uc81c \ud0c0\uc785\uc774 \ud568\uaed8 \ud45c\uc2dc \ub418\ub3c4\ub85d \ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c\uacfc \uac19\uc740 \ucf54\ub4dc\uac00 \uc788\ub2e4\uace0 \ud560 \ub54c<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"eclipse\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"true\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;iostream>\nusing namespace std;\n\nclass Base {\npublic:\n  virtual void identify() {\n      cout &lt;&lt; \"Base class\" &lt;&lt; endl;\n  }\n};\n\nclass Derived: public Base {\npublic:\n  void identify() override {\n      cout &lt;&lt; \"Derived class\" &lt;&lt; endl;\n  }\n};\n\n\nint main(void) {\n  \/\/ Derived class instance \uc774\uc9c0\ub9cc\n  \/\/ GDB\uc5d0\uc11c Base type\uc73c\ub85c \ud45c\uc2dc\ub41c\ub2e4.\n  Base *c = new Derived();\n  c->identify();\n\n  delete c;\n}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">main() \ud568\uc218 \ub0b4\uc758 &#8220;Base *c&#8221;\ub97c GDB\uc5d0\uc11c \ud655\uc778\ud574 \ubcf4\uba74 \uc2e4\uc81c \uc778\uc2a4\ud134\uc2a4\uc758 \ud0c0\uc785\uacfc \uad00\ub828 \uc5c6\uc774 Base class\ub85c \ud45c\uc2dc\ub41c\ub2e4.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">(gdb) ptype c\ntype = class Base {\n  public:\n    virtual void identify(void);\n} *<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2e4\uc81c \uc778\uc2a4\ud134\uc2a4\uac00 \ubb34\uc5c7\uc778\uc9c0 \uc54c\uace0 \uc2f6\ub2e4\uba74, set print ojbect on\uc744 \uc124\uc815\ud574\uc11c ptype \uacb0\uacfc\uc5d0 \uc2e4\uc81c \uc778\uc2a4\ud134\uc2a4\uac00 \ud568\uaed8 \ud45c\uc2dc\ub418\ub3c4\ub85d \ud560 \uc218 \uc788\ub2e4. ( \/* real type = &#8230; *\/)<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">(gdb) set print object on\n(gdb) ptype c\ntype = \/* real type = Derived * *\/\nclass Base {\n  public:\n    virtual void identify(void);\n} *<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774 \uc124\uc815\uc744 \ub2e4\ub978 \uc720\uc6a9\ud55c \uac83\ub4e4\uacfc \ud568\uaed8 ~\/.gdbinit\uc5d0 \ub123\uc5b4\ub450\uba74 gdb\uac00 \uc2e4\ud589\ub420 \ub54c \uc790\ub3d9\uc73c\ub85c \uc124\uc815\ub41c\ub2e4.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$ cat ~\/.gdbinit\nset print object on\nset print pretty on\nset print static-members on\nset print vtbl on<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Base class\ub85c \ubd80\ud130 \uc0c1\uc18d \ubc1b\uc740 Derived class\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c Base class \ud3ec\uc778\ud130\uc5d0 \ub123\uc73c\uba74 GDB\uc5d0\uc11c \ud0c0\uc785\uc774 \uc81c\ub300\ub85c \ud45c\uc2dc\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc774 \ub54c\ub294 &#8216;set print object on&#8217;\uc744 \uc124\uc815\ud574\uc11c GDB\uc758 ptype &lt;var&gt; \uba85\ub839 \uacb0\uacfc\uc5d0 \ud574\ub2f9 \uc778\uc2a4\ud134\uc2a4\uc758 \uc2e4\uc81c \ud0c0\uc785\uc774 \ud568\uaed8 \ud45c\uc2dc \ub418\ub3c4\ub85d \ud560 \uc218 \uc788\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c\uacfc \uac19\uc740 \ucf54\ub4dc\uac00 \uc788\ub2e4\uace0 \ud560 \ub54c main() \ud568\uc218 \ub0b4\uc758 &#8220;Base *c&#8221;\ub97c GDB\uc5d0\uc11c \ud655\uc778\ud574 \ubcf4\uba74 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[4],"tags":[247,194,248,72,249],"class_list":["post-2615","post","type-post","status-publish","format-standard","hentry","category-linux","tag-c","tag-gdb","tag-gdbinit","tag-linux","tag-ptype"],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":3434,"url":"https:\/\/litcoder.com\/?p=3434","url_meta":{"origin":2615,"position":0},"title":"C++\uc5d0\uc11c \uc624\ubc84\ub77c\uc774\ub4dc\ub41c \ud568\uc218\uac00 \uc548\ubd88\ub7ec\uc838\uc694","author":"litcoder","date":"2024\ub144 8\uc6d4 5\uc77c","format":false,"excerpt":"Data\ub77c\uace0 \ud558\ub294 \uc815\ubcf4\ub97c \uc800\uc7a5\ud558\ub294 \ud074\ub798\uc2a4\ub4e4\uc758 \uae30\ucd08 \ud074\ub798\uc2a4\uac00 \uc788\ub2e4\uace0 \ud574\ubcf4\uc790. Data\uc758 type\uc5d0 \ub530\ub77c \ub85c\ub529 \ud558\ub294 \ubc29\ubc95\uc774 \uc11c\ub85c \ub2ec\ub77c\uc9c0\uae30 \ub54c\ubb38\uc5d0 loadData()\ub77c\uace0 \ud558\ub294 \uac00\uc0c1\ud568\uc218\ub97c \ud558\ub098 \uc815\uc758\ud574 \ub450\uace0, \uc0c1\uc18d\ubc1b\ub294 \ud074\ub798\uc2a4\ub4e4\uc740 \uc790\uae30\uac00 loading\ud558\ub294 \ubc29\ubc95\uc744 \uc815\uc758\ud558\ub3c4\ub85d \uad6c\uc131\ud55c\ub2e4. class Data { public: Data(int v) { loadData(v); } void dispValue() { cout << \"Value is \" << _val\u2026","rel":"","context":"&quot;Programming&quot;\uc5d0\uc11c","block_context":{"text":"Programming","link":"https:\/\/litcoder.com\/?cat=5"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3509,"url":"https:\/\/litcoder.com\/?p=3509","url_meta":{"origin":2615,"position":1},"title":"gRPC\ub97c \uc774\uc6a9\ud55c Observer Pattern","author":"litcoder","date":"2024\ub144 10\uc6d4 14\uc77c","format":false,"excerpt":"Remote\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \uae30\ub2a5\uc744 \ub9c8\uce58 local system\uc758 function call \ucc98\ub7fc \uc81c\uacf5 \ud55c\ub2e4\ub294 gRPC\uc758 \uac1c\ub150 \uc790\uccb4\ub294 1990\ub144\ub300\uc5d0\ub3c4 \uc788\uc5c8\ub358 \uac83\uc774\uae30\uc5d0 \uc0c8\ub85c\uc6b8 \uac83\uc740 \uc5c6\uc9c0\ub9cc, \uadf8 \uc704\uc5d0\uc11c \"Subject\uc758 \ubcc0\uacbd\uc774 \uc788\uc744 \ub54c subscriber\uc5d0\uac8c notify \ud574\uc8fc\ub294 Observer Pattern\uc744 \uc5b4\ub5bb\uac8c \uad6c\ud604 \ud560 \uc218 \uc788\uc744\uae4c?\"\ud558\ub294 \uc758\ubb38\uc774 \ub4e4\uc5c8\ub2e4. \uc774 \ud3ec\uc2a4\ud305\uc5d0\uc11c\ub294 gRPC\ub97c \uc774\uc6a9\ud55c observer pattern\uc758 \uc608\uc81c\ub85c server\uc5d0\uc11c \uc784\uc758\uc758 \uc8fc\uc2dd\uacfc \uadf8 \ubcc0\ub3d9\u2026","rel":"","context":"&quot;Programming&quot;\uc5d0\uc11c","block_context":{"text":"Programming","link":"https:\/\/litcoder.com\/?cat=5"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2024\/10\/grpc_observer.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2024\/10\/grpc_observer.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2024\/10\/grpc_observer.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2024\/10\/grpc_observer.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":4146,"url":"https:\/\/litcoder.com\/?p=4146","url_meta":{"origin":2615,"position":2},"title":"Lightsail \uc2a4\ub0c5\uc0f7\uc73c\ub85c \ud558\uc704 \uc778\uc2a4\ud134\uc2a4\ub97c \uc0dd\uc131\ud560 \uc218 \uc5c6\ub2e4","author":"litcoder","date":"2026\ub144 3\uc6d4 4\uc77c","format":false,"excerpt":"Lightsail\uc758 WordPress \uc778\uc2a4\ud134\uc2a4\ub97c AL2023\uc73c\ub85c \uc804\ud658 \ud560 \ub54c, All-in-One Migration utility\ub85c import\ub97c \uc2dc\ub3c4\ud558\ub294\ub370 \uc774\uc804\uc5d0 \ubcf8 \uc801\uc774 \uc5c6\ub358 internal error\uac00 \ubc1c\uc0dd\ud588\ub2e4. \ubd84\uba85 \uc5c5\ub85c\ub4dc \uac00\ub2a5\ud55c \ud30c\uc77c \ud06c\uae30\ub3c4 import\ud558\ub294 \uc555\ucd95 \ud30c\uc77c \ubcf4\ub2e4 \ud06c\uac8c \uc124\uc815\ud574 \uc8fc\uc5c8\uace0 \ub2e4\ub978 \uc124\uc815\ub4e4\ub3c4 \ubaa8\ub450 \ub9c8\ucce4\uc74c\uc5d0\ub3c4 \uacc4\uc18d\ud574\uc11c \uc2e4\ud328\ud558\ub294 \uac83\uc774\ub2e4. YYYY\/MM\/DD HH:MM:SS [error] 32777#32777: *4 FastCGI sent in stderr: \"PHP message: PHP\u2026","rel":"","context":"&quot;Linux&quot;\uc5d0\uc11c","block_context":{"text":"Linux","link":"https:\/\/litcoder.com\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_instance_from_snapshot-2.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_instance_from_snapshot-2.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_instance_from_snapshot-2.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_instance_from_snapshot-2.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":4139,"url":"https:\/\/litcoder.com\/?p=4139","url_meta":{"origin":2615,"position":3},"title":"Bitnami \uc6cc\ub4dc\ud504\ub808\uc2a4\ub97c Amazon Linux 2023\uc73c\ub85c \ub9c8\uc774\uadf8\ub808\uc774\uc158","author":"litcoder","date":"2026\ub144 2\uc6d4 25\uc77c","format":false,"excerpt":"\ucc98\uc74c Lightsail\ub85c \uc774\uc0ac\uc654\uc744 \ub54c \uc778\uc2a4\ud134\uc2a4 \uc120\ud0dd\uc5d0\ub294 \ud070 \uace0\ubbfc\uc744 \ub4e4\uc774\uc9c0\ub294 \uc54a\uc558\ub2e4. \uc81c\uacf5\ub418\ub294 WordPress instance\uc5d0\ub294 \ud544\uc694\ud55c \uac83\ub4e4\uc774 \uc774\ubbf8 \ub2e4 \uc124\uce58 \ub418\uc5b4 \uc788\uc5b4\uc11c \uc778\uc2a4\ud134\uc2a4\ub97c \ud558\ub098 \uc0dd\uc131\ud558\uace0 \uae30\uc874 \ube14\ub85c\uadf8\ub97c import\ud558\ub294 \uac83\uc73c\ub85c \ubaa8\ub4e0 \uacfc\uc815\ub4e4\uc774 \ube44\uad50\uc801 \uc21c\uc870\ub86d\uac8c \uc9c4\ud589\ub41c \ud3b8\uc774\uc5c8\ub2e4. \ubb38\uc81c\ub294 \uc774 WordPress \uc778\uc2a4\ud134\uc2a4\uac00 Bitnami\ub85c \ub418\uc5b4 \uc788\uc5b4\uc11c \uc138\ubd80\uc801\uc778 \uad00\ub9ac \uc791\uc5c5\uc5d0\ub294 \uc81c\uc57d\uc774 \ub9ce\ub2e4\ub294 \uc810\uc774\ub2e4. \uadf8\ub798\uc11c AWS\uc5d0 \ucd5c\uc801\ud654 \ub418\uc5b4\u2026","rel":"","context":"&quot;Linux&quot;\uc5d0\uc11c","block_context":{"text":"Linux","link":"https:\/\/litcoder.com\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_https_port.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_https_port.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_https_port.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/litcoder.com\/wp-content\/uploads\/2026\/02\/lightsail_https_port.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":878,"url":"https:\/\/litcoder.com\/?p=878","url_meta":{"origin":2615,"position":4},"title":"App engine &#8211; \uc9c0\uc815\ud55c \ub2ec\uc758 google calendar event \uac00\uc838\uc624\uae30","author":"litcoder","date":"2013\ub144 11\uc6d4 7\uc77c","format":false,"excerpt":"Google calendar API \uc124\uba85\ubb38\uc11c\uc5d0\ub294 event list\ub97c \uac00\uc838\uc624\ub294 \ubc29\ubc95\uc774 \uc124\uba85\uacfc \ud568\uaed8 \uc608\uc81c code\uac00 \uc81c\uc2dc\ub418\uc5b4 \uc788\ub2e4. page_token = None while True: events = service.events().list(calendarId='primary', pageToken=page_token).execute() for event in events['items']: print event['summary'] page_token = events.get('nextPageToken') if not page_token: break \uc774 \ucf54\ub4dc\ub97c \uc218\ud589\ud558\uba74 \ub2ec\ub825\uc774 \uac00\uc9c0\uace0 \uc788\ub294 \ubaa8\ub4e0 event\ub4e4\uc744 \uac00\uc838\uc624\ub294\ub370, \uc774\uac83\uc744 \uc870\uae08 \uc218\uc815\ud574\uc11c \uc9c0\uc815\ub41c \ub2ec\uc5d0\u2026","rel":"","context":"&quot;Programming&quot;\uc5d0\uc11c","block_context":{"text":"Programming","link":"https:\/\/litcoder.com\/?cat=5"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2627,"url":"https:\/\/litcoder.com\/?p=2627","url_meta":{"origin":2615,"position":5},"title":"GCC\uc5d0\uc11c integer arithmetic overflow \ubc29\uc9c0 \ub300\ucc45","author":"litcoder","date":"2020\ub144 11\uc6d4 25\uc77c","format":false,"excerpt":"Arithmetic overflow\ub294 \ubd80\ud638 \uc788\ub294 \ubcc0\uc218(signed variable)\uac00 \ud45c\uc2dc \ud560 \uc218 \uc788\ub294 \ucd5c\ub313\uac12 \/ \ucd5c\uc19f\uac12\uc744 \ub118\uc5b4 \uc130\uc744 \ub54c \ubd80\ud638\uac00 \ubc14\ub00c\uba74\uc11c \uc6d0\ud558\uc9c0 \uc54a\ub294 \uacb0\uacfc\uac00 \ub098\ud0c0\ub098\ub294 \uacbd\uc6b0\ub97c \ub9d0\ud55c\ub2e4. #include <iostream> #include <climits> using namespace std; int main(void) { int r = 0; int op = INT_MAX; cout << op << \" + 1 =\u2026","rel":"","context":"&quot;Linux&quot;\uc5d0\uc11c","block_context":{"text":"Linux","link":"https:\/\/litcoder.com\/?cat=4"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/posts\/2615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/litcoder.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2615"}],"version-history":[{"count":15,"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/posts\/2615\/revisions"}],"predecessor-version":[{"id":2695,"href":"https:\/\/litcoder.com\/index.php?rest_route=\/wp\/v2\/posts\/2615\/revisions\/2695"}],"wp:attachment":[{"href":"https:\/\/litcoder.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/litcoder.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/litcoder.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}