search for: type_offset

...*, i8*)* @leaf_exception_personality catch i8* inttoptr (i64 987 to i8*) catch i8* inttoptr (i64 2453 to i8*) In my exception handler I walk through the records. I always get the correct count, but I type_table information isn't communicated: both of these records give me a type_offset of 1 (to use the ExceptionDemo's name of that field). I have cross-referenced this walking code with that demo, the gcc sources, and the third party (where it originated) and this aspect seems to be correct. Also, if I mark it as cleanup it'll get a 0 offset as expected (or no record if th...

...section" solution base types are not deduplicated at all. 3. Performance improvement by handling fewer data. #1 leads to loading and parsing fewer bits. 4. Performance improvement by handling fewer references. Simpler reference chains allow parsing references faster.   Instead of this : type_offset->proxy_type->DW_FORM_ref_sig8->type_unit->type_offset->type.   There would be this :   type_offset->type_table->type. >> >> We evaluated the approach on LLVM and Clang codebases. The >> results obtained are summarized in the tables below:...

Hello DWARF fans, I've just posted a set of four refactoring patches for DebugInfo/DWARF, which move in the direction of handling DWARF v4 or v5 type units and compile units more coherently. In DWARF v4, type units and compile units are strictly segregated into the .debug_types and .debug_info sections, respectively. This division was pretty ingrained into how DebugInfo/DWARF handled the

17.09.2019 3:12, David Blaikie пишет: > > > On Wed, Sep 11, 2019 at 3:32 PM Alexey Lapshin via llvm-dev > <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: > > Debuginfo and linker folks, we (AccessSoftek) would like to > suggest a proposal for removing obsolete debug info. If you find > it useful we will be happy to work on

...t;>>> The idea is to have only one "type table" per object file(special section .debug_types_table). >>>>>>>>>> This "type table" would contain all types. >>>>>>>>>> There could be a special type of reference - type_offset - that offset points into the type table. >>>>>>>>>> Basic types could always be placed into the start of "type table" thus, offsets to basic types >>>>>>>>>> most often would be 1 byte. There also would be a special kind of refe...

...he idea is to have only one "type table" per object file(special section .debug_types_table). >>>>>>>>>>>> This "type table" would contain all types. >>>>>>>>>>>> There could be a special type of reference - type_offset - that offset points into the type table. >>>>>>>>>>>> Basic types could always be placed into the start of "type table" thus, offsets to basic types >>>>>>>>>>>> most often would be 1 byte. There also would be a spec...

...t;> >> >> The idea is to have only one "type table" per object file(special section .debug_types_table). >> >> >> >> This "type table" would contain all types. >> >> >> >> There could be a special type of reference - type_offset - that offset points into the type table. >> >> >> >> Basic types could always be placed into the start of "type table" thus, offsets to basic types >> >> >> >> most often would be 1 byte. There also would be a special kind of reference - re...

...pe table" per object > file(special section .debug_types_table). > >>>>>>>>>>>> This "type table" would contain all types. > >>>>>>>>>>>> There could be a special type of reference - > type_offset - that offset points into the type table. > >>>>>>>>>>>> Basic types could always be placed into the start of > "type table" thus, offsets to basic types > >>>>>>>>>>>> most often would be 1 byte....

...table" per object >>> file(special section .debug_types_table). >>> >>>>>>>>>>>> This "type table" would contain all types. >>> >>>>>>>>>>>> There could be a special type of reference - type_offset - >>> that offset points into the type table. >>> >>>>>>>>>>>> Basic types could always be placed into the start of "type >>> table" thus, offsets to basic types >>> >>>>>>>>>>>> mo...

...I will shortly describe the idea of making DWARF be easier processed by dsymutil/DWARFLinker: The idea is to have only one "type table" per object file(special section .debug_types_table). This "type table" would contain all types. There could be a special type of reference - type_offset - that offset points into the type table. Basic types could always be placed into the start of "type table" thus, offsets to basic types most often would be 1 byte. There also would be a special kind of reference - reference inside the type. Type units sig8 system - would not be used to...

...of making DWARF be easier processed by dsymutil/DWARFLinker: >> >> The idea is to have only one "type table" per object file(special section .debug_types_table). >> This "type table" would contain all types. >> There could be a special type of reference - type_offset - that offset points into the type table. >> Basic types could always be placed into the start of "type table" thus, offsets to basic types >> most often would be 1 byte. There also would be a special kind of reference - reference inside the type. >> Type units sig8 syst...

...by dsymutil/DWARFLinker: >> >> >> >> The idea is to have only one "type table" per object file(special section .debug_types_table). >> >> This "type table" would contain all types. >> >> There could be a special type of reference - type_offset - that offset points into the type table. >> >> Basic types could always be placed into the start of "type table" thus, offsets to basic types >> >> most often would be 1 byte. There also would be a special kind of reference - reference inside the type. >> &g...

...t;> >> >> >> >> The idea is to have only one "type table" per object file(special section .debug_types_table). >> >> >> This "type table" would contain all types. >> >> >> There could be a special type of reference - type_offset - that offset points into the type table. >> >> >> Basic types could always be placed into the start of "type table" thus, offsets to basic types >> >> >> most often would be 1 byte. There also would be a special kind of reference - reference inside the...

...type table" per object file(special section .debug_types_table). >>>> >>>>>>>>>>>> This "type table" would contain all types. >>>> >>>>>>>>>>>> There could be a special type of reference - type_offset - that offset points into the type table. >>>> >>>>>>>>>>>> Basic types could always be placed into the start of "type table" thus, offsets to basic types >>>> >>>>>>>>>>>> most often would be...

...;>> >> >>>> >> The idea is to have only one "type table" per object file(special section .debug_types_table). >>>> >> This "type table" would contain all types. >>>> >> There could be a special type of reference - type_offset - that offset points into the type table. >>>> >> Basic types could always be placed into the start of "type table" thus, offsets to basic types >>>> >> most often would be 1 byte. There also would be a special kind of reference - reference inside the t...

...t;>> >> The idea is to have only one "type table" per object > file(special section .debug_types_table). > > >>>> >> This "type table" would contain all types. > > >>>> >> There could be a special type of reference - type_offset - that > offset points into the type table. > > >>>> >> Basic types could always be placed into the start of "type > table" thus, offsets to basic types > > >>>> >> most often would be 1 byte. There also would be a special kind > of...

>DWARF was designed in an era when COMDAT and ICF were not a thing, or at least not common, >certainly not when talking about function code. The overhead of a unit occurred only once per >translation unit, so that expense was reasonably amortized. >Splitting functions into their own object-file sections and making them excludable is an evolution of >compiler/linker technology that