llvm-dwarfdump: implement --find for .apple_names
This patch implements the dwarfdump option --find=<name>. This option
looks for a DIE in the accelerator tables and dumps it if found. This
initial patch only adds support for .apple_names to keep the review
small, adding the other sections and pubnames support should be
trivial though.
Differential Revision: https://reviews.llvm.org/D38282
llvm-svn: 314439
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index d82a03e..4a5253a 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -453,8 +453,7 @@
if (shouldDump(Explicit, ".apple_names", DIDT_ID_AppleNames,
DObj->getAppleNamesSection().Data))
- dumpAccelSection(OS, *DObj, DObj->getAppleNamesSection(),
- DObj->getStringSection(), isLittleEndian());
+ getAppleNames().dump(OS);
if (shouldDump(Explicit, ".apple_types", DIDT_ID_AppleTypes,
DObj->getAppleTypesSection().Data))
@@ -638,6 +637,24 @@
return Macro.get();
}
+static DWARFAcceleratorTable &
+getAccelTable(std::unique_ptr<DWARFAcceleratorTable> &Cache,
+ const DWARFObject &Obj, const DWARFSection &Section,
+ StringRef StringSection, bool IsLittleEndian) {
+ if (Cache)
+ return *Cache;
+ DWARFDataExtractor AccelSection(Obj, Section, IsLittleEndian, 0);
+ DataExtractor StrData(StringSection, IsLittleEndian, 0);
+ Cache.reset(new DWARFAcceleratorTable(AccelSection, StrData));
+ Cache->extract();
+ return *Cache;
+}
+
+const DWARFAcceleratorTable &DWARFContext::getAppleNames() {
+ return getAccelTable(AppleNames, *DObj, DObj->getAppleNamesSection(),
+ DObj->getStringSection(), isLittleEndian());
+}
+
const DWARFLineTable *
DWARFContext::getLineTableForUnit(DWARFUnit *U) {
if (!Line)