Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail From: Chet Ramey Newsgroups: gnu.bash.bug Subject: Re: Unexpected delay in using arguments. Date: Sat, 29 Dec 2018 10:39:04 -0600 Organization: ITS, Case Western Reserve University Lines: 52 Approved: bug-bash@gnu.org Message-ID: References: <20180814123113518879862@bob.proulx.com> <20180815011219279040096@bob.proulx.com> <9a4dd312-8e3e-4b6a-05d5-699855bbfedf@case.edu> Reply-To: chet.ramey@case.edu NNTP-Posting-Host: lists.gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: usenet.stanford.edu 1546102295 27468 208.118.235.17 (29 Dec 2018 16:51:35 GMT) X-Complaints-To: action@cs.stanford.edu Cc: chet.ramey@case.edu, bug-bash To: Bize Ma Envelope-to: bug-bash@gnu.org X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:cc:subject:to:references:from:openpgp :autocrypt:organization:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=fnN4bcwvCwGeF/ZO1r47Qp/CNqkU27hETt0Gsilmgiw=; b=QFaxh3hbYSk6YFvoVamMlCPioEoPvMb1zDKFA8vgya8q/u8BD1d1EcBHnRbpqNSIgG kyXXfBBOzRa+WQQsnRiRknIF+NY5kaGs8CV9zvXeajoXqXEdE6k1dKZPhYJA6fnsT3y5 VZzv7sxUB/7DA4UjAEMQUxlCClfww4qITl+/QgAyZ+MGxMQZlwsc1hEsZftWaAyaYpIm 59Tn419BmTBK2J8H1T2DpK65OlZcC8iOYV4cqagKo0I85NmFUf2br4NEDqh/S5pF6jvb PDUpDlOJGAMvoZl0AWWwU+iKFssqdRX/X8GQIGQJu3lQNbGvDIyL4cR7BFu0OgY6hU1K v4VA== X-Gm-Message-State: AA+aEWaaCyA8uX1WSQt2fj6/8DFM4lWOTsaRqIFf3c1PQuCuaYrt7n0z pmVYl4Yxmav1Evx5NBCQ1Cnktl6lot+yVJ18wiZk1m2+ZS6VGVviN+YfKCdqvtzaogQweJ6JNAn mKeHB+xL9Mr8= X-Received: by 2002:a24:4fcb:: with SMTP id c194mr19877601itb.47.1546101546863; Sat, 29 Dec 2018 08:39:06 -0800 (PST) X-Google-Smtp-Source: AFSGD/XYq2gkIohtYiXQFM/OGL4FKfzWQPMNEeSiPcxoEaVutd3rFkliIJGcc/NSHJGfANIomVwbAg== X-Received: by 2002:a24:4fcb:: with SMTP id c194mr19877593itb.47.1546101546645; Sat, 29 Dec 2018 08:39:06 -0800 (PST) Openpgp: preference=signencrypt Autocrypt: addr=chet.ramey@case.edu; prefer-encrypt=mutual; keydata= mQGiBEEOsGwRBACFa0A1oa71HSZLWxAx0svXzhOZNQZOzqHmSuGOG92jIpQpr8DpvgRh40Yp AwdcXb8QG1J5yGAKeevNE1zCFaA725vGSdHUyypHouV0xoWwukYO6qlyyX+2BZU+okBUqoWQ koWxiYaCSfzB2Ln7pmdys1fJhcgBKf3VjWCjd2XJTwCgoFJOwyBFJdugjfwjSoRSwDOIMf0D /iQKqlWhIO1LGpMrGX0il0/x4zj0NAcSwAk7LaPZbN4UPjn5pqGEHBlf1+xDDQCkAoZ/VqES GZragl4VqJfxBr29Ag0UDvNbUbXoxQsARdero1M8GiAIRc50hj7HXFoERwenbNDJL86GPLAQ OTGOCa4W2o29nFfFjQrsrrYHzVtyA/9oyKvTeEMJ7NA3VJdWcmn7gOu0FxEmSNhSoV1T4vP2 1Wf7f5niCCRKQLNyUy0wEApQi4tSysdz+AbgAc0b/bHYVzIf2uO2lIEZQNNt+3g2bmXgloWm W5fsm/di50Gm1l1Na63d3RZ00SeFQos6WEwLUHEB0yp6KXluXLLIZitEJLQwQ2hldCBSYW1l eSAoQ2FzZSBzdGFuZGFyZCkgPGNoZXQucmFtZXlAY2FzZS5lZHU+iF8EExECAB8FAkPi19EC GwMHCwkIBwMCAQMVAgMDFgIBAh4BAheAAAoJELtYafBk6nSrelkAn31Gsuib7GcCZHbv5L5t VKYR9LklAJ4hzUHKA49Z0QXR+qCb80osIcmPSbkBDQRBDrBvEAQAkK6TAOKBEM+EC4j6V/7o /riVZqcgU5cid2qG9TXdwNtD9a3kvA/ObZBO93sX59wc6Bnwo4VJxsOmMlpGrAjJsxNwg3QH akEtf8LXRbVpj5xStdmBdQZUhIQyalo/2/TZq5OijtddUQcL5cs70hTv/FpT3wUvr2Xr8rjF 41IFEz8AAwcD/A0CZEGlzIrT5WCBnl6xBog/8vKiUCbarByat3d1mL6DbizvKNXQRTC9E/vE dENAWCQCjr75Bu55xT8n3SXGtWdDC5xmZ/P3OBYORP8yl8H8I1FIosWOFirbIeYdZPq8SPD1 HL+EXo9zSiHVrrZRJ19ooCKKbSdXHFCY+aJG+0KZiEkEGBECAAkFAkEOsG8CGwwACgkQu1hp 8GTqdKvjcACfZlkVCDwaz/NTO9cy3t69oWpVPNwAnRwe0qk/WL/gfhH346xh5B3HFbFN User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 In-Reply-To: Content-Language: en-US X-Junkmail-Status: score=8/90, host=mpv3-2015.case.edu X-Junkmail-PrAS-Raw: score=8/90, refid=2.7.2:2018.12.29.154216:17:8.317, ip=, rules=__YOUTUBE_RCVD, __X_GOOGLE_DKIM_SIGNATURE, __HAS_REPLYTO, __HAS_CC_HDR, __MULTIPLE_RCPTS_CC_X2, __CC_NAME, __CC_NAME_DIFF_FROM_ACC, __SUBJ_REPLY, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __TO_MALFORMED_2, __TO_NAME, __TO_NAME_DIFF_FROM_ACC, __REFERENCES, __HAS_FROM, FROM_EDU_TLD, __HAS_MSGID, __SANE_MSGID, DATE_TZ_NA, __USER_AGENT, __MOZILLA_USER_AGENT, __MIME_VERSION, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __CTE, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __FROM_DOMAIN_IN_ANY_CC2, __REPLYTO_SAMEAS_FROM_DOMAIN, __ANY_URI, __URI_WITH_PATH, __FRAUD_BODY_WEBMAIL, __URI_NO_WWW, __CP_URI_IN_BODY, __FRAUD_MONEY_CURRENCY_DOLLAR, __SUBJ_ALPHA_NEGATE, __URI_IN_BODY, __URI_NOT_IMG, __FORWARDED_MSG, __NO_HTML_TAG_RAW, BODYTEXTP_SIZE_3000_LESS, BODY_SIZE_2000_2999, __MIME_TEXT_P1, __MIME_TEXT_ONLY, __URI_NS, HTML_00_01, HTML_00_10, [TRUNCATED], so=2010-03-03 19:42:08, dmn=2016-08-03-0138 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 129.22.103.194 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com gnu.bash.bug:15005 On 12/28/18 10:58 PM, Bize Ma wrote: > Chet Ramey (>) wrote: > > On 12/23/18 12:07 PM, Bize Ma wrote: > >   > {...} >   > > > Have you been able to "take a look" ? > > Yes, as a matter of fact. Look at the changelog for the day or two around > the date of the referenced messages. > > > I am pretty sure that I will not understand the finer details of the c code > even > if I could take a look at it. But, for the learning: could you be so kind as to > provide some pointer as to where to find the change log ? Thanks!. It's in CWRU/CWRU.chlog in the development distributions, with a symlink from ChangeLog in releases. Here are the relevant entries. 8/15 ---- variables.c - dollar_arg_stack: now a stack of struct saved_dollar_vars, which has an array for the first ten (dollar_vars) and a WORD_LIST * for the remaining (rest_of_args). Fixes performance issue with function calls and large numbers of positional parameters raised by Bize Ma - {save,restore,free,free_saved}_dollar_vars: new functions to manage dollar_vars and dollar_arg_stack members. Need to keep these in sync with whatever remember_args does - push_dollar_vars: use save_dollar_vars, which just copies pointers, and directly assign rest_of_args, without copying the words, to the dollar_arg_stack entry. Have to clear dollar_vars and rest_of_args with the assumption that callers will call remember_args(args, 1) immediately following - pop_dollar_vars: free current positional parameters and restore old ones from pointers saved in dollar_arg_stack, making sure to invalidate any cached value for "$@" - dispose_saved_dollar_vars: free saved pointers from current index into dollar_arg_stack -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/