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Split address information for DWARF5 split dwarf proposal. This involves

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using the DW_FORM_GNU_addr_index and a separate .debug_addr section which
stays in the executable and is fully linked.

Sneak in two other small changes:

a) Print out the debug_str_offsets.dwo section.
b) Change form we're expecting the entries in the debug_str_offsets.dwo
   section to take from ULEB128 to U32.

Add tests for all of this in the fission-cu.ll test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172578 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-01-15 23:56:56 +00:00
parent af50dda410
commit 72f7bfbf0e
13 changed files with 204 additions and 28 deletions
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21
lib/DebugInfo/DWARFFormValue.cpp
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@ -325,6 +325,16 @@ DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
switch (Form) {
case DW_FORM_addr: OS << format("0x%016" PRIx64, uvalue); break;
case DW_FORM_GNU_addr_index: {
StringRef AddrOffsetSec = cu->getAddrOffsetSection();
OS << format(" indexed (%8.8x) address = ", (uint32_t)uvalue);
if (AddrOffsetSec.size() != 0) {
DataExtractor DA(AddrOffsetSec, true, cu->getAddressByteSize());
OS << format("0x%016" PRIx64, getIndirectAddress(&DA, cu));
} else
OS << "<no .debug_addr section>";
break;
}
case DW_FORM_flag_present: OS << "true"; break;
case DW_FORM_flag:
case DW_FORM_data1: OS << format("0x%02x", (uint8_t)uvalue); break;
@ -452,10 +462,19 @@ DWARFFormValue::getIndirectCString(const DataExtractor *DS,
if (!DS || !DSO) return NULL;
uint32_t offset = Value.uval * 4;
uint32_t soffset = DSO->getULEB128(&offset);
uint32_t soffset = DSO->getU32(&offset);
return DS->getCStr(&soffset);
}
uint64_t
DWARFFormValue::getIndirectAddress(const DataExtractor *DA,
const DWARFCompileUnit *cu) const {
if (!DA) return 0;
uint32_t offset = Value.uval * cu->getAddressByteSize();
return DA->getAddress(&offset);
}
uint64_t DWARFFormValue::getReference(const DWARFCompileUnit *cu) const {
uint64_t die_offset = Value.uval;
switch (Form) {