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Diffstat (limited to 'unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp')
| -rw-r--r-- | unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp b/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp new file mode 100644 index 0000000000000..371e2af95decf --- /dev/null +++ b/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp @@ -0,0 +1,124 @@ +//===- 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 "llvm/DebugInfo/DWARF/DWARFFormValue.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/Support/Dwarf.h" +#include "llvm/Support/Host.h" +#include "llvm/Support/LEB128.h" +#include "gtest/gtest.h" +#include <climits> +using namespace llvm; +using namespace dwarf; + +namespace { + +TEST(DWARFFormValue, FixedFormSizes) { + // Size of DW_FORM_addr and DW_FORM_ref_addr are equal in DWARF2, + // DW_FORM_ref_addr is always 4 bytes in DWARF32 starting from DWARF3. + ArrayRef<uint8_t> sizes = DWARFFormValue::getFixedFormSizes(4, 2); + EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]); + sizes = DWARFFormValue::getFixedFormSizes(8, 2); + EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]); + sizes = DWARFFormValue::getFixedFormSizes(8, 3); + EXPECT_EQ(4, sizes[DW_FORM_ref_addr]); + // Check that we don't have fixed form sizes for weird address sizes. + EXPECT_EQ(0U, DWARFFormValue::getFixedFormSizes(16, 2).size()); +} + +bool isFormClass(uint16_t Form, DWARFFormValue::FormClass FC) { + return DWARFFormValue(Form).isFormClass(FC); +} + +TEST(DWARFFormValue, FormClass) { + EXPECT_TRUE(isFormClass(DW_FORM_addr, DWARFFormValue::FC_Address)); + EXPECT_FALSE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Address)); + EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Constant)); + EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_SectionOffset)); + EXPECT_TRUE( + isFormClass(DW_FORM_sec_offset, DWARFFormValue::FC_SectionOffset)); + EXPECT_TRUE(isFormClass(DW_FORM_GNU_str_index, DWARFFormValue::FC_String)); + EXPECT_TRUE(isFormClass(DW_FORM_GNU_addr_index, DWARFFormValue::FC_Address)); + EXPECT_FALSE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Address)); + EXPECT_TRUE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Reference)); + EXPECT_TRUE(isFormClass(DW_FORM_ref_sig8, DWARFFormValue::FC_Reference)); +} + +template<typename RawTypeT> +DWARFFormValue createDataXFormValue(uint16_t Form, RawTypeT Value) { + char Raw[sizeof(RawTypeT)]; + memcpy(Raw, &Value, sizeof(RawTypeT)); + uint32_t Offset = 0; + DWARFFormValue Result(Form); + DataExtractor Data(StringRef(Raw, sizeof(RawTypeT)), + sys::IsLittleEndianHost, sizeof(void*)); + Result.extractValue(Data, &Offset, nullptr); + return Result; +} + +DWARFFormValue createULEBFormValue(uint64_t Value) { + SmallString<10> RawData; + raw_svector_ostream OS(RawData); + encodeULEB128(Value, OS); + uint32_t Offset = 0; + DWARFFormValue Result(DW_FORM_udata); + DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*)); + Result.extractValue(Data, &Offset, nullptr); + return Result; +} + +DWARFFormValue createSLEBFormValue(int64_t Value) { + SmallString<10> RawData; + raw_svector_ostream OS(RawData); + encodeSLEB128(Value, OS); + uint32_t Offset = 0; + DWARFFormValue Result(DW_FORM_sdata); + DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*)); + Result.extractValue(Data, &Offset, nullptr); + return Result; +} + +TEST(DWARFFormValue, SignedConstantForms) { + // Check that we correctly sign extend fixed size forms. + auto Sign1 = createDataXFormValue<uint8_t>(DW_FORM_data1, -123); + auto Sign2 = createDataXFormValue<uint16_t>(DW_FORM_data2, -12345); + auto Sign4 = createDataXFormValue<uint32_t>(DW_FORM_data4, -123456789); + auto Sign8 = createDataXFormValue<uint64_t>(DW_FORM_data8, -1); + EXPECT_EQ(Sign1.getAsSignedConstant().getValue(), -123); + EXPECT_EQ(Sign2.getAsSignedConstant().getValue(), -12345); + EXPECT_EQ(Sign4.getAsSignedConstant().getValue(), -123456789); + EXPECT_EQ(Sign8.getAsSignedConstant().getValue(), -1); + + // Check that we can handle big positive values, but that we return + // an error just over the limit. + auto UMax = createULEBFormValue(LLONG_MAX); + auto TooBig = createULEBFormValue(uint64_t(LLONG_MAX) + 1); + EXPECT_EQ(UMax.getAsSignedConstant().getValue(), LLONG_MAX); + EXPECT_EQ(TooBig.getAsSignedConstant().hasValue(), false); + + // Sanity check some other forms. + auto Data1 = createDataXFormValue<uint8_t>(DW_FORM_data1, 120); + auto Data2 = createDataXFormValue<uint16_t>(DW_FORM_data2, 32000); + auto Data4 = createDataXFormValue<uint32_t>(DW_FORM_data4, 2000000000); + auto Data8 = createDataXFormValue<uint64_t>(DW_FORM_data8, 0x1234567812345678LL); + auto LEBMin = createSLEBFormValue(LLONG_MIN); + auto LEBMax = createSLEBFormValue(LLONG_MAX); + auto LEB1 = createSLEBFormValue(-42); + auto LEB2 = createSLEBFormValue(42); + EXPECT_EQ(Data1.getAsSignedConstant().getValue(), 120); + EXPECT_EQ(Data2.getAsSignedConstant().getValue(), 32000); + EXPECT_EQ(Data4.getAsSignedConstant().getValue(), 2000000000); + EXPECT_EQ(Data8.getAsSignedConstant().getValue(), 0x1234567812345678LL); + EXPECT_EQ(LEBMin.getAsSignedConstant().getValue(), LLONG_MIN); + EXPECT_EQ(LEBMax.getAsSignedConstant().getValue(), LLONG_MAX); + EXPECT_EQ(LEB1.getAsSignedConstant().getValue(), -42); + EXPECT_EQ(LEB2.getAsSignedConstant().getValue(), 42); +} + +} // end anonymous namespace |