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Add support for separating strings for the split debug info DWARF5

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proposal. This leaves the strings in the skeleton die as strp,
but in all dwo files they're accessed now via DW_FORM_GNU_str_index.

Add support for dumping these sections and modify the fission-cu.ll
testcase to have the correct strings and form. Fix a small bug
in the fixed form sizes routine that involved out of array accesses
for the table and add a FIXME in the extractFast routine to fix
this up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171779 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-01-07 19:32:41 +00:00
parent 5b7f9216c3
commit dd8e9f395e
12 changed files with 120 additions and 19 deletions
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13
lib/DebugInfo/DWARFDebugInfoEntry.cpp
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@ -12,6 +12,7 @@
#include "DWARFContext.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFFormValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
@ -113,9 +114,14 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *cu,
uint32_t i;
uint16_t form;
for (i=0; i<numAttributes; ++i) {
form = AbbrevDecl->getFormByIndex(i);
const uint8_t fixed_skip_size = fixed_form_sizes[form];
// FIXME: Currently we're checking if this is less than the last
// entry in the fixed_form_sizes table, but this should be changed
// to use dynamic dispatch.
const uint8_t fixed_skip_size = (form < DW_FORM_ref_sig8) ?
fixed_form_sizes[form] : 0;
if (fixed_skip_size)
offset += fixed_skip_size;
else {
@ -187,6 +193,8 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *cu,
case DW_FORM_sdata:
case DW_FORM_udata:
case DW_FORM_ref_udata:
case DW_FORM_GNU_str_index:
case DW_FORM_GNU_addr_index:
debug_info_data.getULEB128(&offset);
break;
@ -207,7 +215,6 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *cu,
return false;
}
offset += form_size;
} while (form_is_indirect);
}
}
@ -327,6 +334,8 @@ DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *cu,
case DW_FORM_sdata:
case DW_FORM_udata:
case DW_FORM_ref_udata:
case DW_FORM_GNU_str_index:
case DW_FORM_GNU_addr_index:
debug_info_data.getULEB128(&offset);
break;