Split address information for DWARF5 split dwarf proposal. This involves
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
diff --git a/lib/DebugInfo/DWARFFormValue.cpp b/lib/DebugInfo/DWARFFormValue.cpp
index 14c6804..d1bcf96 100644
--- a/lib/DebugInfo/DWARFFormValue.cpp
+++ b/lib/DebugInfo/DWARFFormValue.cpp
@@ -325,6 +325,16 @@
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 @@
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) {