Mercurial > hg > xemacs-beta
annotate src/free-hook.c @ 5492:e82f5b7010fe
Merge some stuff in man, fix up Makefile
-------------------- ChangeLog entries follow: --------------------
man/ChangeLog addition:
2010-02-19 Ben Wing <ben@xemacs.org>
* widget.texi:
* widget.texi (Top):
* widget.texi (Introduction):
* widget.texi (User Interface):
* widget.texi (Programming Example):
* widget.texi (Setting Up the Buffer):
* widget.texi (Basic Types):
* widget.texi (link):
* widget.texi (url-link):
* widget.texi (info-link):
* widget.texi (push-button):
* widget.texi (editable-field):
* widget.texi (text):
* widget.texi (menu-choice):
* widget.texi (radio-button-choice):
* widget.texi (item):
* widget.texi (choice-item):
* widget.texi (toggle):
* widget.texi (checkbox):
* widget.texi (checklist):
* widget.texi (editable-list):
* widget.texi (group):
* widget.texi (Sexp Types):
* widget.texi (constants):
* widget.texi (generic):
* widget.texi (atoms):
* widget.texi (composite):
* widget.texi (Widget Properties):
* widget.texi (Defining New Widgets):
* widget.texi (Widget Browser):
* widget.texi (Widget Minor Mode):
* widget.texi (Utilities):
* widget.texi (Widget Wishlist):
* widget.texi (Widget Internals):
* widget.texi (GNU Free Documentation License):
* widget.texi (Index):
Sync with FSF 23.1.92.
2010-02-19 Ben Wing <ben@xemacs.org>
* texinfo/fdl.texi: New file.
* texinfo/texinfo.texi:
* texinfo/texinfo.texi (Top):
* texinfo/texinfo.texi (Copying Conditions):
* texinfo/texinfo.texi (Overview):
* texinfo/texinfo.texi (Reporting Bugs):
* texinfo/texinfo.texi (Using Texinfo):
* texinfo/texinfo.texi (Output Formats):
* texinfo/texinfo.texi (Info Files):
* texinfo/texinfo.texi (Printed Books):
* texinfo/texinfo.texi (Formatting Commands):
* texinfo/texinfo.texi (Conventions):
* texinfo/texinfo.texi (Comments):
* texinfo/texinfo.texi (Minimum):
* texinfo/texinfo.texi (Six Parts):
* texinfo/texinfo.texi (Short Sample):
* texinfo/texinfo.texi (History):
* texinfo/texinfo.texi (Texinfo Mode):
* texinfo/texinfo.texi (Texinfo Mode Overview):
* texinfo/texinfo.texi (XEmacs Editing):
* texinfo/texinfo.texi (Inserting):
* texinfo/texinfo.texi (Showing the Structure):
* texinfo/texinfo.texi (Updating Nodes and Menus):
* texinfo/texinfo.texi (Updating Commands):
* texinfo/texinfo.texi (Updating Requirements):
* texinfo/texinfo.texi (Other Updating Commands):
* texinfo/texinfo.texi (Info Formatting):
* texinfo/texinfo.texi (Printing):
* texinfo/texinfo.texi (Texinfo Mode Summary):
* texinfo/texinfo.texi (Beginning a File):
* texinfo/texinfo.texi (Sample Beginning):
* texinfo/texinfo.texi (Texinfo File Header):
* texinfo/texinfo.texi (First Line):
* texinfo/texinfo.texi (Start of Header):
* texinfo/texinfo.texi (setfilename):
* texinfo/texinfo.texi (settitle):
* texinfo/texinfo.texi (End of Header):
* texinfo/texinfo.texi (Document Permissions):
* texinfo/texinfo.texi (copying):
* texinfo/texinfo.texi (insertcopying):
* texinfo/texinfo.texi (Titlepage & Copyright Page):
* texinfo/texinfo.texi (titlepage):
* texinfo/texinfo.texi (titlefont center sp):
* texinfo/texinfo.texi (title subtitle author):
* texinfo/texinfo.texi (Copyright):
* texinfo/texinfo.texi (end titlepage):
* texinfo/texinfo.texi (headings on off):
* texinfo/texinfo.texi (Contents):
* texinfo/texinfo.texi (The Top Node):
* texinfo/texinfo.texi (Top Node Example):
* texinfo/texinfo.texi (Master Menu Parts):
* texinfo/texinfo.texi (Global Document Commands):
* texinfo/texinfo.texi (documentdescription):
* texinfo/texinfo.texi (setchapternewpage):
* texinfo/texinfo.texi (paragraphindent):
* texinfo/texinfo.texi (firstparagraphindent):
* texinfo/texinfo.texi (exampleindent):
* texinfo/texinfo.texi (Software Copying Permissions):
* texinfo/texinfo.texi (Ending a File):
* texinfo/texinfo.texi (Printing Indices & Menus):
* texinfo/texinfo.texi (File End):
* texinfo/texinfo.texi (Structuring):
* texinfo/texinfo.texi (Tree Structuring):
* texinfo/texinfo.texi (Structuring Command Types):
* texinfo/texinfo.texi (makeinfo top):
* texinfo/texinfo.texi (chapter):
* texinfo/texinfo.texi (unnumbered & appendix):
* texinfo/texinfo.texi (majorheading & chapheading):
* texinfo/texinfo.texi (section):
* texinfo/texinfo.texi (unnumberedsec appendixsec heading):
* texinfo/texinfo.texi (subsection):
* texinfo/texinfo.texi (unnumberedsubsec appendixsubsec subheading):
* texinfo/texinfo.texi (subsubsection):
* texinfo/texinfo.texi (Raise/lower sections):
* texinfo/texinfo.texi (Nodes):
* texinfo/texinfo.texi (Two Paths):
* texinfo/texinfo.texi (Node Menu Illustration):
* texinfo/texinfo.texi (node):
* texinfo/texinfo.texi (Node Names):
* texinfo/texinfo.texi (Writing a Node):
* texinfo/texinfo.texi (Node Line Tips):
* texinfo/texinfo.texi (Node Line Requirements):
* texinfo/texinfo.texi (First Node):
* texinfo/texinfo.texi (makeinfo top command):
* texinfo/texinfo.texi (makeinfo Pointer Creation):
* texinfo/texinfo.texi (anchor):
* texinfo/texinfo.texi (Menus):
* texinfo/texinfo.texi (Menu Location):
* texinfo/texinfo.texi (Writing a Menu):
* texinfo/texinfo.texi (Menu Parts):
* texinfo/texinfo.texi (Less Cluttered Menu Entry):
* texinfo/texinfo.texi (Menu Example):
* texinfo/texinfo.texi (Other Info Files):
* texinfo/texinfo.texi (Cross References):
* texinfo/texinfo.texi (References):
* texinfo/texinfo.texi (Cross Reference Commands):
* texinfo/texinfo.texi (Cross Reference Parts):
* texinfo/texinfo.texi (xref):
* texinfo/texinfo.texi (Reference Syntax):
* texinfo/texinfo.texi (One Argument):
* texinfo/texinfo.texi (Two Arguments):
* texinfo/texinfo.texi (Three Arguments):
* texinfo/texinfo.texi (Four and Five Arguments):
* texinfo/texinfo.texi (Top Node Naming):
* texinfo/texinfo.texi (ref):
* texinfo/texinfo.texi (pxref):
* texinfo/texinfo.texi (inforef):
* texinfo/texinfo.texi (uref):
* texinfo/texinfo.texi (cite):
* texinfo/texinfo.texi (Marking Text):
* texinfo/texinfo.texi (Indicating):
* texinfo/texinfo.texi (Useful Highlighting):
* texinfo/texinfo.texi (code):
* texinfo/texinfo.texi (kbd):
* texinfo/texinfo.texi (key):
* texinfo/texinfo.texi (samp):
* texinfo/texinfo.texi (verb):
* texinfo/texinfo.texi (var):
* texinfo/texinfo.texi (env):
* texinfo/texinfo.texi (file):
* texinfo/texinfo.texi (command):
* texinfo/texinfo.texi (option):
* texinfo/texinfo.texi (dfn):
* texinfo/texinfo.texi (abbr):
* texinfo/texinfo.texi (acronym):
* texinfo/texinfo.texi (indicateurl):
* texinfo/texinfo.texi (email):
* texinfo/texinfo.texi (Emphasis):
* texinfo/texinfo.texi (emph & strong):
* texinfo/texinfo.texi (Smallcaps):
* texinfo/texinfo.texi (Fonts):
* texinfo/texinfo.texi (Quotations and Examples):
* texinfo/texinfo.texi (Block Enclosing Commands):
* texinfo/texinfo.texi (quotation):
* texinfo/texinfo.texi (example):
* texinfo/texinfo.texi (verbatim):
* texinfo/texinfo.texi (verbatiminclude):
* texinfo/texinfo.texi (lisp):
* texinfo/texinfo.texi (small):
* texinfo/texinfo.texi (display):
* texinfo/texinfo.texi (format):
* texinfo/texinfo.texi (exdent):
* texinfo/texinfo.texi (flushleft & flushright):
* texinfo/texinfo.texi (noindent):
* texinfo/texinfo.texi (indent):
* texinfo/texinfo.texi (cartouche):
* texinfo/texinfo.texi (Lists and Tables):
* texinfo/texinfo.texi (Introducing Lists):
* texinfo/texinfo.texi (itemize):
* texinfo/texinfo.texi (enumerate):
* texinfo/texinfo.texi (Two-column Tables):
* texinfo/texinfo.texi (table):
* texinfo/texinfo.texi (ftable vtable):
* texinfo/texinfo.texi (itemx):
* texinfo/texinfo.texi (Multi-column Tables):
* texinfo/texinfo.texi (Multitable Column Widths):
* texinfo/texinfo.texi (Multitable Rows):
* texinfo/texinfo.texi (Special Displays):
* texinfo/texinfo.texi (Floats):
* texinfo/texinfo.texi (float):
* texinfo/texinfo.texi (caption shortcaption):
* texinfo/texinfo.texi (listoffloats):
* texinfo/texinfo.texi (Images):
* texinfo/texinfo.texi (Image Syntax):
* texinfo/texinfo.texi (Image Scaling):
* texinfo/texinfo.texi (Footnotes):
* texinfo/texinfo.texi (Footnote Commands):
* texinfo/texinfo.texi (Footnote Styles):
* texinfo/texinfo.texi (Indices):
* texinfo/texinfo.texi (Index Entries):
* texinfo/texinfo.texi (Predefined Indices):
* texinfo/texinfo.texi (Indexing Commands):
* texinfo/texinfo.texi (Combining Indices):
* texinfo/texinfo.texi (syncodeindex):
* texinfo/texinfo.texi (synindex):
* texinfo/texinfo.texi (New Indices):
* texinfo/texinfo.texi (Insertions):
* texinfo/texinfo.texi (Atsign Braces Comma):
* texinfo/texinfo.texi (Inserting an Atsign):
* texinfo/texinfo.texi (Inserting Braces):
* texinfo/texinfo.texi (Inserting a Comma):
* texinfo/texinfo.texi (Inserting Quote Characters):
* texinfo/texinfo.texi (Inserting Space):
* texinfo/texinfo.texi (Not Ending a Sentence):
* texinfo/texinfo.texi (Ending a Sentence):
* texinfo/texinfo.texi (Multiple Spaces):
* texinfo/texinfo.texi (frenchspacing):
* texinfo/texinfo.texi (dmn):
* texinfo/texinfo.texi (Inserting Accents):
* texinfo/texinfo.texi (Inserting Quotation Marks):
* texinfo/texinfo.texi (Dots Bullets):
* texinfo/texinfo.texi (dots):
* texinfo/texinfo.texi (bullet):
* texinfo/texinfo.texi (TeX and copyright):
* texinfo/texinfo.texi (tex):
* texinfo/texinfo.texi (copyright symbol):
* texinfo/texinfo.texi (registered symbol):
* texinfo/texinfo.texi (euro):
* texinfo/texinfo.texi (pounds):
* texinfo/texinfo.texi (textdegree):
* texinfo/texinfo.texi (minus):
* texinfo/texinfo.texi (geq leq):
* texinfo/texinfo.texi (math):
* texinfo/texinfo.texi (Click Sequences):
* texinfo/texinfo.texi (Glyphs):
* texinfo/texinfo.texi (Glyphs Summary):
* texinfo/texinfo.texi (result):
* texinfo/texinfo.texi (expansion):
* texinfo/texinfo.texi (Print Glyph):
* texinfo/texinfo.texi (Error Glyph):
* texinfo/texinfo.texi (Equivalence):
* texinfo/texinfo.texi (Point Glyph):
* texinfo/texinfo.texi (Breaks):
* texinfo/texinfo.texi (Break Commands):
* texinfo/texinfo.texi (Line Breaks):
* texinfo/texinfo.texi (- and hyphenation):
* texinfo/texinfo.texi (allowcodebreaks):
* texinfo/texinfo.texi (w):
* texinfo/texinfo.texi (tie):
* texinfo/texinfo.texi (sp):
* texinfo/texinfo.texi (page):
* texinfo/texinfo.texi (group):
* texinfo/texinfo.texi (need):
* texinfo/texinfo.texi (Definition Commands):
* texinfo/texinfo.texi (Def Cmd Template):
* texinfo/texinfo.texi (Def Cmd Continuation Lines):
* texinfo/texinfo.texi (Optional Arguments):
* texinfo/texinfo.texi (deffnx):
* texinfo/texinfo.texi (Def Cmds in Detail):
* texinfo/texinfo.texi (Functions Commands):
* texinfo/texinfo.texi (Variables Commands):
* texinfo/texinfo.texi (Typed Functions):
* texinfo/texinfo.texi (Typed Variables):
* texinfo/texinfo.texi (Data Types):
* texinfo/texinfo.texi (Abstract Objects):
* texinfo/texinfo.texi (Object-Oriented Variables):
* texinfo/texinfo.texi (Object-Oriented Methods):
* texinfo/texinfo.texi (Defining Macros):
* texinfo/texinfo.texi (Invoking Macros):
* texinfo/texinfo.texi (Macro Details):
* texinfo/texinfo.texi (alias):
* texinfo/texinfo.texi (definfoenclose):
* texinfo/texinfo.texi (Hardcopy):
* texinfo/texinfo.texi (Use TeX):
* texinfo/texinfo.texi (Format with tex/texindex):
* texinfo/texinfo.texi (Format with texi2dvi):
* texinfo/texinfo.texi (Print with lpr):
* texinfo/texinfo.texi (Within XEmacs):
* texinfo/texinfo.texi (Texinfo Mode Printing):
* texinfo/texinfo.texi (Compile-Command):
* texinfo/texinfo.texi (Requirements Summary):
* texinfo/texinfo.texi (Preparing for TeX):
* texinfo/texinfo.texi (Overfull hboxes):
* texinfo/texinfo.texi (smallbook):
* texinfo/texinfo.texi (A4 Paper):
* texinfo/texinfo.texi (pagesizes):
* texinfo/texinfo.texi (Cropmarks and Magnification):
* texinfo/texinfo.texi (PDF Output):
* texinfo/texinfo.texi (Obtaining TeX):
* texinfo/texinfo.texi (Creating and Installing Info Files):
* texinfo/texinfo.texi (Creating an Info File):
* texinfo/texinfo.texi (makeinfo advantages):
* texinfo/texinfo.texi (Invoking makeinfo):
* texinfo/texinfo.texi (makeinfo options):
* texinfo/texinfo.texi (Pointer Validation):
* texinfo/texinfo.texi (makeinfo in XEmacs):
* texinfo/texinfo.texi (texinfo-format commands):
* texinfo/texinfo.texi (Batch Formatting):
* texinfo/texinfo.texi (Tag and Split Files):
* texinfo/texinfo.texi (Installing an Info File):
* texinfo/texinfo.texi (Directory File):
* texinfo/texinfo.texi (New Info File):
* texinfo/texinfo.texi (Other Info Directories):
* texinfo/texinfo.texi (Installing Dir Entries):
* texinfo/texinfo.texi (Invoking install-info):
* texinfo/texinfo.texi (Generating HTML):
* texinfo/texinfo.texi (HTML Translation):
* texinfo/texinfo.texi (HTML Splitting):
* texinfo/texinfo.texi (HTML CSS):
* texinfo/texinfo.texi (HTML Xref):
* texinfo/texinfo.texi (HTML Xref Link Basics):
* texinfo/texinfo.texi (HTML Xref Node Name Expansion):
* texinfo/texinfo.texi (HTML Xref Command Expansion):
* texinfo/texinfo.texi (HTML Xref 8-bit Character Expansion):
* texinfo/texinfo.texi (HTML Xref Mismatch):
* texinfo/texinfo.texi (Command List):
* texinfo/texinfo.texi (Command Syntax):
* texinfo/texinfo.texi (Tips):
* texinfo/texinfo.texi (Sample Texinfo Files):
* texinfo/texinfo.texi (Short Sample Texinfo File):
* texinfo/texinfo.texi (GNU Sample Texts):
* texinfo/texinfo.texi (Invoking sample):
* texinfo/texinfo.texi (GNU Free Documentation License):
* texinfo/texinfo.texi (Index):
* texinfo/texinfo.texi (Verbatim Copying License):
* texinfo/texinfo.texi (All-permissive Copying License):
* texinfo/texinfo.texi (Include Files):
* texinfo/texinfo.texi (Using Include Files):
* texinfo/texinfo.texi (texinfo-multiple-files-update):
* texinfo/texinfo.texi (Include Files Requirements):
* texinfo/texinfo.texi (Sample Include File):
* texinfo/texinfo.texi (Include Files Evolution):
* texinfo/texinfo.texi (Headings):
* texinfo/texinfo.texi (Headings Introduced):
* texinfo/texinfo.texi (Heading Format):
* texinfo/texinfo.texi (Heading Choice):
* texinfo/texinfo.texi (Custom Headings):
* texinfo/texinfo.texi (Catching Mistakes):
* texinfo/texinfo.texi (makeinfo Preferred):
* texinfo/texinfo.texi (Debugging with Info):
* texinfo/texinfo.texi (Debugging with TeX):
* texinfo/texinfo.texi (Using texinfo-show-structure):
* texinfo/texinfo.texi (Using occur):
* texinfo/texinfo.texi (Running Info-Validate):
* texinfo/texinfo.texi (Using Info-validate):
* texinfo/texinfo.texi (Unsplit):
* texinfo/texinfo.texi (Tagifying):
* texinfo/texinfo.texi (Splitting):
* texinfo/texinfo.texi (Refilling Paragraphs):
* texinfo/texinfo.texi (Command and Variable Index):
* texinfo/texinfo.texi (General Index):
* texinfo/version.texi: New file.
Sync with FSF 23.1.92. Make new directory to hold the files needed
to generate texinfo.info, since there are three such files now.
2010-02-19 Ben Wing <ben@xemacs.org>
* Makefile:
* Makefile (src_files1):
* Makefile (DIR):
* Makefile (texinfo-srcs):
* Makefile ($(INFODIR)/widget.info):
* Makefile ($(INFODIR)/texinfo.info):
* Makefile (.PHONY):
* Makefile (texinfo.dvi):
* Makefile (texinfo.pdf):
* Makefile ($(HTMLDIR)/widget.html):
* Makefile ($(HTMLDIR)/texinfo.html):
Incorporate texinfo.texi moving to a subdirectory texinfo/.
Do some tricks to reduce the amount of duplication while still
maintaining compatible with non-GNU make (at least, with
Solaris make).
* doclicense.texi: New file.
* info.texi:
* info.texi (Top):
* info.texi (Getting Started):
* info.texi (Help-Small-Screen):
* info.texi (Help):
* info.texi (Help-P):
* info.texi (Help-^L):
* info.texi (Help-Inv):
* info.texi (Help-]):
* info.texi (Help-M):
* info.texi (Help-FOO):
* info.texi (Help-Xref):
* info.texi (Help-Int):
* info.texi (Help-Q):
* info.texi (Advanced):
* info.texi (Search Text):
* info.texi (Search Index):
* info.texi (Go to node):
* info.texi (Choose menu subtopic):
* info.texi (Create Info buffer):
* info.texi (XEmacs Info Variables):
* info.texi (Expert Info):
* info.texi (Add):
* info.texi (Menus):
* info.texi (Cross-refs):
* info.texi (Help-Cross):
* info.texi (Tags):
* info.texi (Checking):
* info.texi (Index):
* texinfo.tex:
* texinfo.tex (paragraphindent{%):
* texinfo.tex (sectionheading will have):
* texinfo.tex (chapterzzz{#3}%):
* texinfo.tex (subsubsection = \numberedsubsubsec):
* texinfo.tex (subsubsection = \appendixsubsubsec):
* texinfo.tex (subsubsection = \unnumberedsubsubsec):
* texinfo.tex (sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%):
* texinfo.tex (sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%):
* texinfo.tex (sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%):
* texinfo.tex (sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%):
* texinfo.tex (sectionheading{#1}{subsec}{Yappendix}%):
* texinfo.tex (sectionheading{#1}{subsec}{Ynothing}%):
* texinfo.tex (sectionheading{#1}{subsubsec}{Ynumbered}%):
* texinfo.tex (sectionheading{#1}{subsubsec}{Yappendix}%):
* texinfo.tex (sectionheading{#1}{subsubsec}{Ynothing}%):
* texinfo.tex (sectionheading{#1}{subsubsec}{Yomitfromtoc}{}):
* texinfo.tex (sectionheading to do the printing.):
* texinfo.tex (sectionlevel}{#1}{#4}%):
* texinfo.tex (sectionheading, q.v.):
Sync with FSF 23.1.92.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Fri, 19 Feb 2010 22:39:19 -0600 |
| parents | 1227374e7199 |
| children | 6f2158fa75ed |
| rev | line source |
|---|---|
| 428 | 1 /* This file is part of XEmacs. |
| 2 | |
| 3 XEmacs is free software; you can redistribute it and/or modify it | |
| 4 under the terms of the GNU General Public License as published by the | |
| 5 Free Software Foundation; either version 2, or (at your option) any | |
| 6 later version. | |
| 7 | |
| 8 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 9 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 11 for more details. | |
| 12 | |
| 13 You should have received a copy of the GNU General Public License | |
| 14 along with XEmacs; see the file COPYING. If not, write to | |
| 15 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 16 Boston, MA 02111-1307, USA. */ | |
| 17 | |
| 18 /* Synched up with: Not in FSF. */ | |
| 19 | |
| 20 /* Debugging hooks for malloc. */ | |
| 21 | |
| 22 /* These hooks work with gmalloc to catch allocation errors. | |
| 23 In particular, the following is trapped: | |
| 24 | |
| 25 * Freeing the same pointer twice. | |
| 26 * Trying to free a pointer not returned by malloc. | |
| 27 * Trying to realloc a pointer not returned by malloc. | |
| 28 | |
| 1204 | 29 In addition, every word of every block freed is set to 0xdeadbeef |
| 30 (-559038737). This causes many uses of freed storage to be trapped or | |
| 31 recognized. | |
| 428 | 32 |
| 33 When you use this, the storage used by the last FREE_QUEUE_LIMIT | |
| 34 calls to free() is not recycled. When you call free for the Nth | |
| 35 time, the (N - FREE_QUEUE_LIMIT)'th block is actually recycled. | |
| 36 | |
| 37 For these last FREE_QUEUE_LIMIT calls to free() a backtrace is | |
| 38 saved showing where it was called from. The function | |
| 39 find_backtrace() is provided here to be called from GDB with a | |
| 40 pointer (such as would be passed to free()) as argument, e.g. | |
| 41 (gdb) p/a *find_backtrace (0x234000). If SAVE_ARGS is defined, | |
| 42 the first three arguments to each function are saved as well as the | |
| 43 return addresses. | |
| 44 | |
| 45 If UNMAPPED_FREE is defined, instead of setting every word of freed | |
| 46 storage to 0xdeadbeef, every call to malloc goes on its own page(s). | |
| 47 When free() is called, the block is read and write protected. This | |
| 48 is very useful when debugging, since it usually generates a bus error | |
| 49 when the deadbeef hack might only cause some garbage to be printed. | |
| 50 However, this is too slow for everyday use, since it takes an enormous | |
| 51 number of pages. | |
| 52 | |
| 53 | |
| 54 Some other features that would be useful are: | |
| 55 | |
| 56 * Checking for storage leaks. | |
| 57 This could be done by a GC-like facility that would scan the data | |
| 58 segment looking for pointers to allocated storage and tell you | |
| 59 about those that are no longer referenced. This could be invoked | |
| 60 at any time. Another possibility is to report on what allocated | |
| 61 storage is still in use when the process is exited. Typically | |
| 62 there will be a large amount, so this might not be very useful. | |
| 63 */ | |
| 64 | |
| 65 #ifdef emacs | |
| 66 #include <config.h> | |
| 67 #include "lisp.h" | |
| 68 #else | |
| 69 void *malloc (size_t); | |
| 70 #endif | |
| 71 | |
| 72 #if !defined(HAVE_LIBMCHECK) | |
| 73 #include <stdio.h> | |
| 74 | |
| 75 #include "hash.h" | |
| 76 | |
| 77 #ifdef UNMAPPED_FREE | |
| 78 #include <sys/mman.h> | |
| 79 #include <sys/param.h> | |
| 80 #define ROUND_UP_TO_PAGE(i) (((i) + PAGEOFFSET) & PAGEMASK) | |
| 81 #endif | |
| 82 | |
| 83 #include <sys/types.h> | |
| 84 | |
| 85 /* System function prototypes don't belong in C source files */ | |
| 86 /* extern void free (void *); */ | |
| 87 | |
| 88 static struct hash_table *pointer_table; | |
| 89 | |
| 90 extern void (*__free_hook) (void *); | |
| 91 extern void *(*__malloc_hook) (size_t); | |
| 92 | |
| 93 static void *check_malloc (size_t); | |
| 94 | |
| 95 typedef void (*fun_ptr) (void); | |
| 96 | |
| 97 /* free_queue is not too useful without backtrace logging */ | |
| 98 #define FREE_QUEUE_LIMIT 1 | |
| 99 #define TRACE_LIMIT 20 | |
| 100 | |
| 101 typedef struct { | |
| 102 fun_ptr return_pc; | |
| 103 #ifdef SAVE_ARGS | |
| 104 void *arg[3]; | |
| 105 #endif | |
| 106 } fun_entry; | |
| 107 | |
| 108 typedef struct { | |
| 109 void *address; | |
| 110 unsigned long length; | |
| 111 } free_queue_entry; | |
| 112 | |
| 113 static free_queue_entry free_queue[FREE_QUEUE_LIMIT]; | |
| 114 | |
| 115 static int current_free; | |
| 116 | |
| 117 static int strict_free_check; | |
| 118 | |
| 119 static void | |
| 120 check_free (void *ptr) | |
| 121 { | |
| 122 __free_hook = 0; | |
| 123 __malloc_hook = 0; | |
| 124 if (!pointer_table) | |
| 125 pointer_table = make_hash_table (max (100, FREE_QUEUE_LIMIT * 2)); | |
| 126 if (ptr != 0) | |
| 127 { | |
| 128 long size; | |
| 129 #ifdef UNMAPPED_FREE | |
| 130 unsigned long rounded_up_size; | |
| 131 #endif | |
| 132 | |
| 133 EMACS_INT present = (EMACS_INT) gethash (ptr, pointer_table, | |
| 2519 | 134 (const void **) |
| 135 (void *) &size); | |
| 428 | 136 |
| 137 if (!present) | |
| 138 { | |
| 139 /* This can only happen if you try to free something that didn't | |
| 140 come from malloc */ | |
| 141 #if !defined(__linux__) | |
| 142 /* I originally wrote: "There's really no need to drop core." | |
| 143 I have seen the error of my ways. -slb */ | |
| 144 if (strict_free_check) | |
| 2500 | 145 ABORT (); |
| 428 | 146 #endif |
| 147 printf("Freeing unmalloc'ed memory at %p\n", ptr); | |
| 148 __free_hook = check_free; | |
| 149 __malloc_hook = check_malloc; | |
| 150 goto end; | |
| 151 } | |
| 152 | |
| 153 if (size < 0) | |
| 154 { | |
| 155 /* This happens when you free twice */ | |
| 156 #if !defined(__linux__) | |
| 157 /* See above comment. */ | |
| 158 if (strict_free_check) | |
| 2500 | 159 ABORT (); |
| 428 | 160 #endif |
| 161 printf("Freeing %p twice\n", ptr); | |
| 162 __free_hook = check_free; | |
| 163 __malloc_hook = check_malloc; | |
| 164 goto end; | |
| 165 } | |
| 166 | |
| 167 puthash (ptr, (void *)-size, pointer_table); | |
| 168 #ifdef UNMAPPED_FREE | |
| 169 /* Round up size to an even number of pages. */ | |
| 170 rounded_up_size = ROUND_UP_TO_PAGE (size); | |
| 171 /* Protect the pages freed from all access */ | |
| 172 if (strict_free_check) | |
| 173 mprotect (ptr, rounded_up_size, PROT_NONE); | |
| 174 #else | |
| 175 /* Set every word in the block to 0xdeadbeef */ | |
| 176 if (strict_free_check) | |
| 177 { | |
| 178 unsigned long long_length = (size + (sizeof (long) - 1)) | |
| 179 / sizeof (long); | |
| 180 unsigned long i; | |
| 181 | |
| 3988 | 182 /* Not using the DEADBEEF_CONSTANT #define, since we don't know |
| 183 * that allocation sizes will be multiples of eight. */ | |
| 428 | 184 for (i = 0; i < long_length; i++) |
| 185 ((unsigned long *) ptr)[i] = 0xdeadbeef; | |
| 186 } | |
| 187 #endif | |
| 188 free_queue[current_free].address = ptr; | |
| 189 free_queue[current_free].length = size; | |
| 190 | |
| 191 current_free++; | |
| 192 if (current_free >= FREE_QUEUE_LIMIT) | |
| 193 current_free = 0; | |
| 194 /* Really free this if there's something there */ | |
| 195 { | |
| 196 void *old = free_queue[current_free].address; | |
| 197 | |
| 198 if (old) | |
| 199 { | |
| 200 #ifdef UNMAPPED_FREE | |
| 201 unsigned long old_len = free_queue[current_free].length; | |
| 202 | |
| 203 mprotect (old, old_len, PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 204 #endif | |
| 205 free (old); | |
| 206 remhash (old, pointer_table); | |
| 207 } | |
| 208 } | |
| 209 } | |
| 210 __free_hook = check_free; | |
| 211 __malloc_hook = check_malloc; | |
| 212 | |
| 213 end: | |
| 214 return; | |
| 215 } | |
| 216 | |
| 217 static void * | |
| 218 check_malloc (size_t size) | |
| 219 { | |
| 220 size_t rounded_up_size; | |
| 221 void *result; | |
| 222 | |
| 223 __free_hook = 0; | |
| 224 __malloc_hook = 0; | |
| 225 if (size == 0) | |
| 226 { | |
| 227 result = 0; | |
| 228 goto end; | |
| 229 } | |
| 230 #ifdef UNMAPPED_FREE | |
| 231 /* Round up to an even number of pages. */ | |
| 232 rounded_up_size = ROUND_UP_TO_PAGE (size); | |
| 233 #else | |
| 234 rounded_up_size = size; | |
| 235 #endif | |
| 236 result = malloc (rounded_up_size); | |
| 237 if (!pointer_table) | |
| 238 pointer_table = make_hash_table (FREE_QUEUE_LIMIT * 2); | |
| 239 puthash (result, (void *)size, pointer_table); | |
| 240 __free_hook = check_free; | |
| 241 __malloc_hook = check_malloc; | |
| 242 end: | |
| 243 return result; | |
| 244 } | |
| 245 | |
| 246 extern void *(*__realloc_hook) (void *, size_t); | |
| 247 | |
| 248 #ifdef MIN | |
| 249 #undef MIN | |
| 250 #endif | |
| 251 #define MIN(A, B) ((A) < (B) ? (A) : (B)) | |
| 252 | |
| 253 /* Don't optimize realloc */ | |
| 254 | |
| 255 static void * | |
| 256 check_realloc (void * ptr, size_t size) | |
| 257 { | |
| 258 EMACS_INT present; | |
| 259 size_t old_size; | |
| 260 void *result = malloc (size); | |
| 261 | |
| 262 if (!ptr) return result; | |
| 442 | 263 present = (EMACS_INT) gethash (ptr, pointer_table, (const void **) &old_size); |
| 428 | 264 if (!present) |
| 265 { | |
| 266 /* This can only happen by reallocing a pointer that didn't | |
| 267 come from malloc. */ | |
| 268 #if !defined(__linux__) | |
| 269 /* see comment in check_free(). */ | |
| 2500 | 270 ABORT (); |
| 428 | 271 #endif |
| 272 printf("Realloc'ing unmalloc'ed pointer at %p\n", ptr); | |
| 273 } | |
| 274 | |
| 275 if (result == 0) | |
| 276 goto end; | |
| 277 memcpy (result, ptr, MIN (size, old_size)); | |
| 278 free (ptr); | |
| 279 end: | |
| 280 return result; | |
| 281 } | |
| 282 | |
| 283 void enable_strict_free_check (void); | |
| 284 void | |
| 285 enable_strict_free_check (void) | |
| 286 { | |
| 287 strict_free_check = 1; | |
| 288 } | |
| 289 | |
| 290 void disable_strict_free_check (void); | |
| 291 void | |
| 292 disable_strict_free_check (void) | |
| 293 { | |
| 294 strict_free_check = 0; | |
| 295 } | |
| 296 | |
| 297 /* Note: All BLOCK_INPUT stuff removed from this file because it's | |
| 298 completely gone in XEmacs */ | |
| 299 | |
| 300 static void * | |
| 301 block_input_malloc (size_t size); | |
| 302 | |
| 303 static void | |
| 304 block_input_free (void* ptr) | |
| 305 { | |
| 306 __free_hook = 0; | |
| 307 __malloc_hook = 0; | |
| 308 free (ptr); | |
| 309 __free_hook = block_input_free; | |
| 310 __malloc_hook = block_input_malloc; | |
| 311 } | |
| 312 | |
| 313 static void * | |
| 314 block_input_malloc (size_t size) | |
| 315 { | |
| 316 void* result; | |
| 317 __free_hook = 0; | |
| 318 __malloc_hook = 0; | |
| 319 result = malloc (size); | |
| 320 __free_hook = block_input_free; | |
| 321 __malloc_hook = block_input_malloc; | |
| 322 return result; | |
| 323 } | |
| 324 | |
| 325 | |
| 326 static void * | |
| 327 block_input_realloc (void* ptr, size_t size) | |
| 328 { | |
| 329 void* result; | |
| 330 __free_hook = 0; | |
| 331 __malloc_hook = 0; | |
| 332 __realloc_hook = 0; | |
| 333 result = realloc (ptr, size); | |
| 334 __free_hook = block_input_free; | |
| 335 __malloc_hook = block_input_malloc; | |
| 336 __realloc_hook = block_input_realloc; | |
| 337 return result; | |
| 338 } | |
| 339 | |
| 340 #ifdef emacs | |
| 341 | |
| 342 void disable_free_hook (void); | |
| 343 void | |
| 344 disable_free_hook (void) | |
| 345 { | |
| 346 __free_hook = block_input_free; | |
| 347 __malloc_hook = block_input_malloc; | |
| 348 __realloc_hook = block_input_realloc; | |
| 349 } | |
| 350 | |
| 351 void | |
| 352 init_free_hook (void) | |
| 353 { | |
| 354 __free_hook = check_free; | |
| 355 __malloc_hook = check_malloc; | |
| 356 __realloc_hook = check_realloc; | |
| 357 current_free = 0; | |
| 358 strict_free_check = 1; | |
| 359 } | |
| 360 | |
| 361 void really_free_one_entry (void *, int, int *); | |
| 362 | |
| 363 DEFUN ("really-free", Freally_free, 0, 1, "P", /* | |
| 364 Actually free the storage held by the free() debug hook. | |
| 365 A no-op if the free hook is disabled. | |
| 366 */ | |
| 2286 | 367 (UNUSED (arg))) |
| 428 | 368 { |
| 369 int count[2]; | |
| 370 Lisp_Object lisp_count[2]; | |
| 371 | |
| 372 if ((__free_hook != 0) && pointer_table) | |
| 373 { | |
| 374 count[0] = 0; | |
| 375 count[1] = 0; | |
| 376 __free_hook = 0; | |
| 377 maphash ((maphash_function)really_free_one_entry, | |
| 378 pointer_table, (void *)&count); | |
| 379 memset (free_queue, 0, sizeof (free_queue_entry) * FREE_QUEUE_LIMIT); | |
| 380 current_free = 0; | |
| 381 __free_hook = check_free; | |
| 793 | 382 lisp_count[0] = make_int (count[0]); |
| 383 lisp_count[1] = make_int (count[1]); | |
| 428 | 384 return Fcons (lisp_count[0], lisp_count[1]); |
| 385 } | |
| 386 else | |
| 387 return Fcons (make_int (0), make_int (0)); | |
| 388 } | |
| 389 | |
| 390 void | |
| 391 really_free_one_entry (void *key, int contents, int *countp) | |
| 392 { | |
| 393 if (contents < 0) | |
| 394 { | |
| 395 free (key); | |
| 396 #ifdef UNMAPPED_FREE | |
| 397 mprotect (key, -contents, PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 398 #endif | |
| 399 remhash (key, pointer_table); | |
| 400 countp[0]++; | |
| 401 countp[1] += -contents; | |
| 402 } | |
| 403 } | |
| 404 | |
| 405 void | |
| 406 syms_of_free_hook (void) | |
| 407 { | |
| 408 DEFSUBR (Freally_free); | |
| 409 } | |
| 410 | |
| 411 #else | |
| 412 void (*__free_hook)(void *) = check_free; | |
| 413 void *(*__malloc_hook)(size_t) = check_malloc; | |
| 414 void *(*__realloc_hook)(void *, size_t) = check_realloc; | |
| 415 #endif | |
| 416 | |
| 417 #endif /* !defined(HAVE_LIBMCHECK) */ | |
| 418 | |
| 419 #if defined(DEBUG_INPUT_BLOCKING) || defined (DEBUG_GCPRO) | |
| 420 | |
| 421 /* Note: There is no more input blocking in XEmacs */ | |
| 422 typedef enum { | |
| 423 block_type, unblock_type, totally_type, | |
| 424 gcpro1_type, gcpro2_type, gcpro3_type, gcpro4_type, gcpro5_type, | |
| 425 ungcpro_type | |
| 426 } blocktype; | |
| 427 | |
| 428 struct block_input_history_struct | |
| 429 { | |
| 430 char *file; | |
| 431 int line; | |
| 432 blocktype type; | |
| 433 int value; | |
| 434 }; | |
| 435 | |
| 436 typedef struct block_input_history_struct block_input_history; | |
| 437 | |
| 438 #endif /* DEBUG_INPUT_BLOCKING || DEBUG_GCPRO */ | |
| 439 | |
| 440 #ifdef DEBUG_INPUT_BLOCKING | |
| 441 | |
| 442 int blhistptr; | |
| 443 | |
| 444 #define BLHISTLIMIT 1000 | |
| 445 | |
| 446 block_input_history blhist[BLHISTLIMIT]; | |
| 447 | |
| 448 note_block_input (char *file, int line) | |
| 449 { | |
| 450 note_block (file, line, block_type); | |
| 2500 | 451 if (interrupt_input_blocked > 2) ABORT(); |
| 428 | 452 } |
| 453 | |
| 454 note_unblock_input (char* file, int line) | |
| 455 { | |
| 456 note_block (file, line, unblock_type); | |
| 457 } | |
| 458 | |
| 459 note_totally_unblocked (char* file, int line) | |
| 460 { | |
| 461 note_block (file, line, totally_type); | |
| 462 } | |
| 463 | |
| 464 note_block (char *file, int line, blocktype type) | |
| 465 { | |
| 466 blhist[blhistptr].file = file; | |
| 467 blhist[blhistptr].line = line; | |
| 468 blhist[blhistptr].type = type; | |
| 469 blhist[blhistptr].value = interrupt_input_blocked; | |
| 470 | |
| 471 blhistptr++; | |
| 472 if (blhistptr >= BLHISTLIMIT) | |
| 473 blhistptr = 0; | |
| 474 } | |
| 475 | |
| 476 #endif /* DEBUG_INPUT_BLOCKING */ | |
| 477 | |
| 478 | |
| 479 #ifdef DEBUG_GCPRO | |
| 480 | |
| 481 int gcprohistptr; | |
| 482 #define GCPROHISTLIMIT 1000 | |
| 483 block_input_history gcprohist[GCPROHISTLIMIT]; | |
| 484 | |
| 485 static void | |
| 486 log_gcpro (char *file, int line, struct gcpro *value, blocktype type) | |
| 487 { | |
| 488 if (type == ungcpro_type) | |
| 489 { | |
| 490 if (value == gcprolist) goto OK; | |
| 2500 | 491 if (! gcprolist) ABORT (); |
| 428 | 492 if (value == gcprolist->next) goto OK; |
| 2500 | 493 if (! gcprolist->next) ABORT (); |
| 428 | 494 if (value == gcprolist->next->next) goto OK; |
| 2500 | 495 if (! gcprolist->next->next) ABORT (); |
| 428 | 496 if (value == gcprolist->next->next->next) goto OK; |
| 2500 | 497 if (! gcprolist->next->next->next) ABORT (); |
| 446 | 498 if (value == gcprolist->next->next->next->next) goto OK; |
| 2500 | 499 ABORT (); |
| 428 | 500 OK:; |
| 501 } | |
| 502 gcprohist[gcprohistptr].file = file; | |
| 503 gcprohist[gcprohistptr].line = line; | |
| 504 gcprohist[gcprohistptr].type = type; | |
| 505 gcprohist[gcprohistptr].value = (int) value; | |
| 506 gcprohistptr++; | |
| 507 if (gcprohistptr >= GCPROHISTLIMIT) | |
| 508 gcprohistptr = 0; | |
| 509 } | |
| 510 | |
| 511 void | |
| 512 debug_gcpro1 (char *file, int line, struct gcpro *gcpro1, Lisp_Object *var) | |
| 513 { | |
| 514 gcpro1->next = gcprolist; gcpro1->var = var; gcpro1->nvars = 1; | |
| 515 gcprolist = gcpro1; | |
| 516 log_gcpro (file, line, gcpro1, gcpro1_type); | |
| 517 } | |
| 518 | |
| 519 void | |
| 520 debug_gcpro2 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 521 Lisp_Object *var1, Lisp_Object *var2) | |
| 522 { | |
| 523 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 524 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 525 gcprolist = gcpro2; | |
| 526 log_gcpro (file, line, gcpro2, gcpro2_type); | |
| 527 } | |
| 528 | |
| 529 void | |
| 530 debug_gcpro3 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 531 struct gcpro *gcpro3, Lisp_Object *var1, Lisp_Object *var2, | |
| 532 Lisp_Object *var3) | |
| 533 { | |
| 534 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 535 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 536 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 537 gcprolist = gcpro3; | |
| 538 log_gcpro (file, line, gcpro3, gcpro3_type); | |
| 539 } | |
| 540 | |
| 541 void | |
| 542 debug_gcpro4 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 543 struct gcpro *gcpro3, struct gcpro *gcpro4, Lisp_Object *var1, | |
| 544 Lisp_Object *var2, Lisp_Object *var3, Lisp_Object *var4) | |
| 545 { | |
| 546 log_gcpro (file, line, gcpro4, gcpro4_type); | |
| 547 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 548 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 549 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 550 gcpro4->next = gcpro3; gcpro4->var = var4; gcpro4->nvars = 1; | |
| 551 gcprolist = gcpro4; | |
| 552 } | |
| 553 | |
| 554 void | |
| 555 debug_gcpro5 (char *file, int line, struct gcpro *gcpro1, struct gcpro *gcpro2, | |
| 556 struct gcpro *gcpro3, struct gcpro *gcpro4, struct gcpro *gcpro5, | |
| 557 Lisp_Object *var1, Lisp_Object *var2, Lisp_Object *var3, | |
| 558 Lisp_Object *var4, Lisp_Object *var5) | |
| 559 { | |
| 560 log_gcpro (file, line, gcpro5, gcpro5_type); | |
| 561 gcpro1->next = gcprolist; gcpro1->var = var1; gcpro1->nvars = 1; | |
| 562 gcpro2->next = gcpro1; gcpro2->var = var2; gcpro2->nvars = 1; | |
| 563 gcpro3->next = gcpro2; gcpro3->var = var3; gcpro3->nvars = 1; | |
| 564 gcpro4->next = gcpro3; gcpro4->var = var4; gcpro4->nvars = 1; | |
| 565 gcpro5->next = gcpro4; gcpro5->var = var5; gcpro5->nvars = 1; | |
| 566 gcprolist = gcpro5; | |
| 567 } | |
| 568 | |
| 569 void | |
| 570 debug_ungcpro (char *file, int line, struct gcpro *gcpro1) | |
| 571 { | |
| 572 log_gcpro (file, line, gcpro1, ungcpro_type); | |
| 573 gcprolist = gcpro1->next; | |
| 574 } | |
| 575 | |
| 576 | |
| 577 /* To be called from the debugger */ | |
| 578 void show_gcprohist (void); | |
| 579 void | |
| 580 show_gcprohist (void) | |
| 581 { | |
| 582 int i, j; | |
| 583 for (i = 0, j = gcprohistptr; | |
| 584 i < GCPROHISTLIMIT; | |
| 585 i++, j++) | |
| 586 { | |
| 587 if (j >= GCPROHISTLIMIT) | |
| 588 j = 0; | |
| 589 printf ("%3d %s %d %s 0x%x\n", | |
| 590 j, gcprohist[j].file, gcprohist[j].line, | |
| 591 (gcprohist[j].type == gcpro1_type ? "GCPRO1" : | |
| 592 gcprohist[j].type == gcpro2_type ? "GCPRO2" : | |
| 593 gcprohist[j].type == gcpro3_type ? "GCPRO3" : | |
| 594 gcprohist[j].type == gcpro4_type ? "GCPRO4" : | |
| 446 | 595 gcprohist[j].type == gcpro5_type ? "GCPRO5" : |
| 428 | 596 gcprohist[j].type == ungcpro_type ? "UNGCPRO" : "???"), |
| 597 gcprohist[j].value); | |
| 598 } | |
| 599 fflush (stdout); | |
| 600 } | |
| 601 | |
| 602 #endif /* DEBUG_GCPRO */ |