Minutes, June 27, 2000
I have spoken with Andrew Salem, President and CEO of the IEEE-ISTO
(Industry Standards and Technology Organization) about bringing the
Dwarf 2 specification under their umbrella. It appears to be designed
for exactly what we are doing -- to provide services (publication,
distribution, editing, etc.) for standards developed by an industry group.
I believe that using the IEEE-ISTO would benefit the Dwarf 2 standardization
effort significantly. This would provide a well known source for the
documentation and establish its credibility as an industry standard.
There is a cost for the IEEE-ISTO service -- probably on the order of
$5000/year. At the meeting I asked that people discuss this with their
corporate management and investigate obtaining commitments for financial
000519.2 Location list for data member
Proposal 000302.1 made changes to the definition of constant. This
proposal permits both loc list references and offsets within an object
to be described by constant values. A DW_FORM_data4 or _data8 constant
is a location reference, while other constants are offsets into the object.
000531.2 Entry_PC attribute
This proposal addresses the issue of finding the entry for a function
which does not have a valid HIGH_PC/LOW_PC address, or where the entry is
not at the LOW_PC address. A function which is not contiguous would not
have high and low pc values defined.
000531.1 Add DW_AT_pc_ranges attribute
This provides a mechanism for describing discontiguous scopes for blocks
or functions. As described, several problems were identified. One is
that the proposal would require assemblers or linkers to support LEB128
data types, since generally compilers are unable to determine offsets
within object files. In other places in Dwarf 2 where an assembler or
linkers is expected to provide values, these values are the size of a
machine address. It was felt that while the functionality proposed was
desirable, requiring extensions to assemblers and linkers in order to
obtain this functionality was undesirable.
Withdrawn pending revision.
000405.1 Global types section
This proposal provides for a section which would contain the names of
global types which are defined in a program. This optional section
is similar to the Pubnames section and contains the fully qualified
unmangled names of classes, including namespace, defined in the program.
Template type name issues, if such exist, are not addressed at this point.
000517.2 Line Number Table Is_Stmt
Following the discussion at the last meeting, this proposal was withdrawn
pending rewording. Since this was determined to be only editorial, and
not to contain any substantive changes to the Dwarf 2 standard, further
consideration by the committee is not required. Editor and proposer will
work out satisfactory wording for the non-normative descriptive text.
000523.1 Reconsider 991118.1 re UTF-8
Seven-bit ASCII is a subset of UTF-8, but common 8-bit ASCII representations
for European characters, such as umlaut or cedilla, are not part of UTF-8.
This proposal adds the DW_AT_use_utf8 flag to DW_TAG_compilation_unit which
indicates that the name is in UTF-8, otherwise the name is in the system
character set, which is unspecified.