/// This is based on the type signature computation given in section 7.27 of the
/// DWARF4 standard. It is an md5 hash of the flattened description of the DIE
/// with the inclusion of the full CU and all top level CU entities.
+// TODO: Initialize the type chain at 0 instead of 1 for CU signatures.
uint64_t DIEHash::computeCUSignature(DIE *Die) {
// Hash the DIE.
// appropriately.
return *reinterpret_cast<support::ulittle64_t *>(Result + 8);
}
+
+/// This is based on the type signature computation given in section 7.27 of the
+/// DWARF4 standard. It is an md5 hash of the flattened description of the DIE
+/// with the inclusion of additional forms not specifically called out in the
+/// standard.
+uint64_t DIEHash::computeTypeSignature(DIE *Die) {
+
+ // Hash the DIE.
+ computeHash(Die);
+
+ // Now return the result.
+ MD5::MD5Result Result;
+ Hash.final(Result);
+
+ // ... take the least significant 8 bytes and return those. Our MD5
+ // implementation always returns its results in little endian, swap bytes
+ // appropriately.
+ return *reinterpret_cast<support::ulittle64_t *>(Result + 8);
+}
/// \brief Computes the CU signature.
uint64_t computeCUSignature(DIE *Die);
+ /// \brief Computes the type signature.
+ uint64_t computeTypeSignature(DIE *Die);
+
// Helper routines to process parts of a DIE.
private:
/// \brief Adds the parent context of \param Die to the hash.
add_subdirectory(ADT)
add_subdirectory(Analysis)
add_subdirectory(Bitcode)
+add_subdirectory(CodeGen)
add_subdirectory(DebugInfo)
add_subdirectory(ExecutionEngine)
add_subdirectory(IR)
--- /dev/null
+set(LLVM_LINK_COMPONENTS
+ asmprinter
+ codegen
+ support
+ )
+
+set(DebugInfoSources
+ DIEHashTest.cpp
+ )
+
+add_llvm_unittest(DebugInfoTests
+ ${DebugInfoSources}
+ )
--- /dev/null
+//===- llvm/unittest/DebugInfo/DWARFFormValueTest.cpp ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "../lib/CodeGen/AsmPrinter/DIE.h"
+#include "../lib/CodeGen/AsmPrinter/DIEHash.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Format.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+using namespace llvm;
+TEST(DIEHashData1Test, DIEHash) {
+ DIEHash Hash;
+ DIE *Die = new DIE(dwarf::DW_TAG_base_type);
+ DIEValue *Size = new DIEInteger(4);
+ Die->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Size);
+ uint64_t MD5Res = Hash.computeTypeSignature(Die);
+ ASSERT_TRUE(MD5Res == 0x540e9ff30ade3e4a);
+ delete Die;
+}
+}
--- /dev/null
+##===- unittests/DebugInfo/Makefile ------------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+TESTNAME = CodeGen
+LINK_COMPONENTS := asmprinter codegen support
+
+include $(LEVEL)/Makefile.config
+
+include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest
LEVEL = ..
-PARALLEL_DIRS = ADT Analysis Bitcode DebugInfo ExecutionEngine IR Object \
- Option Support Transforms
+PARALLEL_DIRS = ADT Analysis Bitcode CodeGen DebugInfo ExecutionEngine IR \
+ Object Option Support Transforms
include $(LEVEL)/Makefile.common