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- Submitted-by: ahby@ui.org (Shane P. McCarron)
-
- The UNIX International Programming Languages Special Interest Group
- has completed a draft of the DWARF debugger format specification, and
- is making it available for industry review. As with all UNIX
- International developed specifications, this document is available
- for distribution without restriction under an X Window System-like
- copyright.
-
- Attached below is the Foreword and Introduction from the document. If
- you would like to receive a copy, send mail to archive@ui.org
- containing the following:
-
- path yourname@your.site
- send PUBLIC/dwarf.v1.mm
-
- for the troff source, or
-
- send PUBLIC/dwarf.v1.ps
-
- for the postscript. If you system supports uncompress and uudecode, you
- can request that the data be compressed by placing the command 'compress'
- in the message.
-
- If you have any questions about the archive service, please contact
- me. If you have questions about the Programming Languages SIG or the
- DWARF specification, please contact the SIG chair, Dan Oldman, at
- d.oldman@ui.org. If you are interested in participating in the
- ongoing discussions of the Programming Languages SIG, please send a
- message containing your fully qualified internet address to
- plsig-request@ui.org.
-
- --
- Shane P. McCarron ATT: +1 201 263-8400 x232
- Project Manager UUCP: s.mccarron@ui.org
-
-
-
- DWARF Debugging Information Format
-
-
- FOREWORD
-
- This document specifies a new generation of symbolic
- debugging information that has been developed by the UNIX
- International Programming Languages Special Interest Group
- (SIG), and is being circulated for industry review. We
- started from the document DWARF Debugging Information
- Requirements - Issue 2, dated April 4, 1990, made available
- by AT&T to its source licensees, and added a significant
- amount of material to clarify what was originally specified
- and to support additional language constructs that were not
- in the original specification.
-
- At this point, the SIG believes that this document
- sufficiently supports the debugging needs of C, C++, and
- FORTRAN 77, and we have released it for public comment. We
- will accept comments on this document until June 15, 1992.
- Comments may be directed via email to me or posted to the
- SIG mailing list (plsig@ui.org). If you are unable to send
- email, paper mail, FAX, or machine readable copy on UNIX,
- MS-DOS, or Macintosh compatible media can be sent to me, and
- I will post it for you.
-
- Tony D'Annunzio
- Vice President of Technology
- UNIX International
- Waterview Corporate Center
- 20 Waterview Boulevard
- Parsippany, NJ 07054
- Phone: +1 201-263-8400
- Fax: +1 201-263-8401
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- Revision: 1.0.0 Page 1 January 20, 1992
- Industry Review Draft
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- Programming Languages SIG
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- 1. INTRODUCTION
-
- This document defines the format for the information
- generated by compilers, assemblers and linkage editors that
- is necessary for symbolic, source-level debugging. The
- debugging information format does not favor the design of
- any compiler or debugger. Instead, the goal is to create a
- method of communicating an accurate picture of the source
- program to any debugger in a form that is economically
- extensible to different languages while retaining backward
- compatibility.
-
- The design of the debugging information format is open-
- ended, allowing for the addition of new debugging
- information to accommodate new languages or debugger
- capabilities while remaining compatible with other languages
- or different debuggers.
-
- 1.1 Purpose and Scope
-
- The debugging information format described in this document
- is designed to meet the symbolic, source-level debugging
- needs of different languages in a unified fashion by
- requiring language independent debugging information
- whenever possible. Individual needs, such as C++ virtual
- functions or Fortran common blocks are accommodated by
- creating attributes that are used only for those languages.
-
- This document describes DWARF Version 1, which is designed
- to be binary compatible with the debugging information that
- is described in the document DWARF Debugging Information
- Requirements - Issue 2, dated April 4, 1990, and made
- available by AT&T to its source licencess. The April 4,
- 1990, document describes the debugging information that is
- generated by the UNIX System V Release 4 C compiler and
- consumed by the System V Release 4 debugger, sdb.
-
- By ``binary compatibility'' we mean that
-
- 1. All features intended to support C and Fortran
- described in the April 4, 1990, document are included
- in this document, and
-
- 2. DWARF produced according to this (DWARF Version 1)
- specification should be considered well formed by a
- System V Release 4 compatible DWARF consumer, but may
- contain information that such a consumer is unable to
- interpret. Consumers are expected to ignore such
- information.
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- Revision: 1.0.0 Page 3 January 20, 1992
- Industry Review Draft
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- DWARF Debugging Information Format
-
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- The intended audience for this document are the developers
- of both producers and consumers of debugging information,
- typically language compilers, debuggers and other tools that
- need to interpret a binary program in terms of its original
- source.
-
- This version of the document is a draft for industry review.
- Vendors developing products based on this draft should be
- aware that the review process may produce changes.
-
- 1.2 Overview
-
- There are two major pieces to the description of the DWARF
- format in this document. The first piece is the debugging
- information, itself. Section two describes the overall
- structure of that information. Section three describes the
- specific debugging information entries and how they
- communicate the necessary information about the source
- program to a debugger.
-
- The second piece of the DWARF description is the way the
- debugging information is encoded and represented in an
- object file. The DWARF encoding is presented in section
- four.
-
- Section five describes compatibility constraints on the
- format. Finally, section six describes external
- dependencies.
-
- In the following sections, text in normal font describes
- required aspects of the DWARF format. Text in italics is
- explanatory or supplementary material, and not part of the
- format definition itself.
-
- 1.3 Vendor Extensibility
-
- This document describes only the features of DWARF that have
- been implemented and tested by at least one vendor (with a
- very few exceptions). It does not attempt to cover all
- languages or even to cover all of the interesting debugging
- information needs for its primary target languages (C, C++,
- Fortran). Therefore the document provides vendors a way to
- define their own debugging information tags, attributes,
- fundamental types, type modifiers, location atoms and
- language names, by reserving a portion of the name space and
- valid values for these constructs for vendor specific
- additions. Future versions of this document will not use
- names or values reserved for vendor specific additions. All
- names and values not reserved for vendor additions, however,
- are reserved for future versions of this document. See
- section 4 for details.
-
-
- Revision: 1.0.0 Page 4 January 20, 1992
- Industry Review Draft
- --
- Shane P. McCarron ATT: +1 201 263-8400 x232
- Project Manager UUCP: s.mccarron@ui.org
-
- [ I wasn't sure about allowing this here. Please let me know whether
- or not you, the readers, want information like this posted -- mod ]
-
- Volume-Number: Volume 27, Number 88
-
-