DWARF: Generate the address lookup table from the DIE tree if .debug_aranges is not available.
Ported from LLDB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139732 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFDebugInfoEntry.cpp b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
index 627fad5..0bf8b69 100644
--- a/lib/DebugInfo/DWARFDebugInfoEntry.cpp
+++ b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
@@ -397,7 +397,8 @@
}
uint64_t
-DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(const DWARFCompileUnit* cu,
+DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
+ const DWARFCompileUnit* cu,
const uint16_t attr,
uint64_t fail_value) const {
DWARFFormValue form_value;
@@ -405,3 +406,26 @@
return form_value.getReference(cu);
return fail_value;
}
+
+void
+DWARFDebugInfoEntryMinimal::buildAddressRangeTable(const DWARFCompileUnit *cu,
+ DWARFDebugAranges *debug_aranges)
+ const {
+ if (AbbrevDecl) {
+ uint16_t tag = AbbrevDecl->getTag();
+ if (tag == DW_TAG_subprogram) {
+ uint64_t hi_pc = -1ULL;
+ uint64_t lo_pc = getAttributeValueAsUnsigned(cu, DW_AT_low_pc, -1ULL);
+ if (lo_pc != -1ULL)
+ hi_pc = getAttributeValueAsUnsigned(cu, DW_AT_high_pc, -1ULL);
+ if (hi_pc != -1ULL)
+ debug_aranges->appendRange(cu->getOffset(), lo_pc, hi_pc);
+ }
+
+ const DWARFDebugInfoEntryMinimal *child = getFirstChild();
+ while (child) {
+ child->buildAddressRangeTable(cu, debug_aranges);
+ child = child->getSibling();
+ }
+ }
+}