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Modified version of a patch from Warren Paul that takes care of issues with 

indirect forms, deals with empty DW_AT_comp_dir attributes, and fixups for
handling other signed integer types.

llvm-svn: 125240
This commit is contained in:
Greg Clayton 2011-02-09 23:39:34 +00:00
parent 56b2ffdaba
commit 7bd65b9fae
3 changed files with 68 additions and 79 deletions
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136
lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
View File

@ -139,6 +139,7 @@ DWARFDebugInfoEntry::FastExtract
bool form_is_indirect = false;
do
{
form_is_indirect = false;
register uint32_t form_size = 0;
switch (form)
{
@ -279,96 +280,77 @@ DWARFDebugInfoEntry::Extract
}
else
{
die_extract_indirect_form:
register uint32_t form_size = 0;
switch (form)
bool form_is_indirect = false;
do
{
// Blocks if inlined data that have a length field and the data bytes
// inlined in the .debug_info
case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break;
case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break;
case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break;
case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break;
// Inlined NULL terminated C-strings
case DW_FORM_string :
form_is_indirect = false;
register uint32_t form_size = 0;
switch (form)
{
// const char *s =
debug_info_data.GetCStr(&offset);
// switch (attr)
// {
// case DW_AT_name: m_name = s; break;
// case DW_AT_MIPS_linkage_name: m_linkage_name = s; break;
// default: break;
// }
}
break;
// Blocks if inlined data that have a length field and the data bytes
// inlined in the .debug_info
case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break;
case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break;
case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break;
case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break;
// Compile unit address sized values
case DW_FORM_addr :
case DW_FORM_ref_addr :
form_size = cu_addr_size;
break;
// Inlined NULL terminated C-strings
case DW_FORM_string : debug_info_data.GetCStr(&offset); break;
// 1 byte values
case DW_FORM_data1 :
case DW_FORM_flag :
case DW_FORM_ref1 :
form_size = 1;
break;
// Compile unit address sized values
case DW_FORM_addr :
case DW_FORM_ref_addr :
form_size = cu_addr_size;
break;
// 2 byte values
case DW_FORM_data2 :
case DW_FORM_ref2 :
form_size = 2;
break;
// 1 byte values
case DW_FORM_data1 :
case DW_FORM_flag :
case DW_FORM_ref1 :
form_size = 1;
break;
// 4 byte values
case DW_FORM_strp :
// switch (attr)
// {
// case DW_AT_name:
// m_name = debug_str_data.PeekCStr(debug_info_data.GetU32(&offset));
// break;
// case DW_AT_MIPS_linkage_name:
// m_linkage_name = debug_str_data.PeekCStr(debug_info_data.GetU32(&offset));
// break;
//
// default:
// 2 byte values
case DW_FORM_data2 :
case DW_FORM_ref2 :
form_size = 2;
break;
// 4 byte values
case DW_FORM_strp :
form_size = 4;
// break;
// }
break;
break;
case DW_FORM_data4 :
case DW_FORM_ref4 :
form_size = 4;
break;
case DW_FORM_data4 :
case DW_FORM_ref4 :
form_size = 4;
break;
// 8 byte values
case DW_FORM_data8 :
case DW_FORM_ref8 :
form_size = 8;
break;
// 8 byte values
case DW_FORM_data8 :
case DW_FORM_ref8 :
form_size = 8;
break;
// signed or unsigned LEB 128 values
// case DW_FORM_APPLE_db_str:
case DW_FORM_sdata :
case DW_FORM_udata :
case DW_FORM_ref_udata :
debug_info_data.Skip_LEB128(&offset);
break;
// signed or unsigned LEB 128 values
case DW_FORM_sdata :
case DW_FORM_udata :
case DW_FORM_ref_udata :
debug_info_data.Skip_LEB128(&offset);
break;
case DW_FORM_indirect :
form = debug_info_data.GetULEB128(&offset);
goto die_extract_indirect_form;
case DW_FORM_indirect :
form = debug_info_data.GetULEB128(&offset);
form_is_indirect = true;
break;
default:
*offset_ptr = offset;
return false;
}
default:
*offset_ptr = offset;
return false;
}
offset += form_size;
offset += form_size;
} while (form_is_indirect);
}
}
*offset_ptr = offset;

4
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
View File

@ -559,7 +559,7 @@ SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* curr_cu, CompUnitSP& compil
{
FileSpec cu_file_spec;
if (cu_die_name[0] == '/' || cu_comp_dir == NULL && cu_comp_dir[0])
if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
{
// If we have a full path to the compile unit, we don't need to resolve
// the file. This can be expensive e.g. when the source files are NFS mounted.
@ -1882,7 +1882,7 @@ SymbolFileDWARF::Index ()
m_aranges->Sort();
#if defined (ENABLE_DEBUG_PRINTF)
StreamFile s(stdout);
StreamFile s(stdout, false);
s.Printf ("DWARF index for (%s) '%s/%s':",
GetObjectFile()->GetModule()->GetArchitecture().AsCString(),
GetObjectFile()->GetFileSpec().GetDirectory().AsCString(),

7
lldb/source/Symbol/ClangASTContext.cpp
View File

@ -755,6 +755,11 @@ ClangASTContext::GetBuiltinTypeForDWARFEncodingAndBitSize (const char *type_name
if (QualTypeMatchesBitSize (bit_size, ast, ast->WCharTy))
return ast->WCharTy.getAsOpaquePtr();
}
else if (streq(type_name, "void"))
{
if (QualTypeMatchesBitSize (bit_size, ast, ast->VoidTy))
return ast->VoidTy.getAsOpaquePtr();
}
}
// We weren't able to match up a type name, just search by size
if (QualTypeMatchesBitSize (bit_size, ast, ast->CharTy))
@ -835,6 +840,8 @@ ClangASTContext::GetBuiltinTypeForDWARFEncodingAndBitSize (const char *type_name
case DW_ATE_unsigned_char:
if (QualTypeMatchesBitSize (bit_size, ast, ast->UnsignedCharTy))
return ast->UnsignedCharTy.getAsOpaquePtr();
if (QualTypeMatchesBitSize (bit_size, ast, ast->UnsignedShortTy))
return ast->UnsignedShortTy.getAsOpaquePtr();
break;
case DW_ATE_imaginary_float: