1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
//===- llvm/unittest/unittests/MC/AMDGPU/Disassembler.cpp -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm-c/Disassembler.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCDisassembler/MCSymbolizer.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "gtest/gtest.h"
using namespace llvm;
static const char *symbolLookupCallback(void *DisInfo, uint64_t ReferenceValue,
uint64_t *ReferenceType,
uint64_t ReferencePC,
const char **ReferenceName) {
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
return nullptr;
}
static const char *TripleName = "amdgcn--amdpal";
static const char *CPUName = "gfx1030";
// Basic smoke test.
TEST(AMDGPUDisassembler, Basic) {
LLVMInitializeAMDGPUTargetInfo();
LLVMInitializeAMDGPUTargetMC();
LLVMInitializeAMDGPUDisassembler();
uint8_t Bytes[] = {0x04, 0x00, 0x80, 0xb0};
uint8_t *BytesP = Bytes;
const char OutStringSize = 100;
char OutString[OutStringSize];
LLVMDisasmContextRef DCR = LLVMCreateDisasmCPU(
TripleName, CPUName, nullptr, 0, nullptr, symbolLookupCallback);
// Skip test if AMDGPU not built.
if (!DCR)
GTEST_SKIP();
size_t InstSize;
unsigned NumBytes = sizeof(Bytes);
unsigned PC = 0U;
InstSize = LLVMDisasmInstruction(DCR, BytesP, NumBytes, PC, OutString,
OutStringSize);
EXPECT_EQ(InstSize, 4U);
EXPECT_EQ(StringRef(OutString), "\ts_version UC_VERSION_GFX10");
LLVMDisasmDispose(DCR);
}
// Check multiple disassemblers in same MCContext.
TEST(AMDGPUDisassembler, MultiDisassembler) {
LLVMInitializeAMDGPUTargetInfo();
LLVMInitializeAMDGPUTargetMC();
LLVMInitializeAMDGPUDisassembler();
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
// Skip test if AMDGPU not built.
if (!TheTarget)
GTEST_SKIP();
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
std::unique_ptr<MCAsmInfo> MAI(
TheTarget->createMCAsmInfo(*MRI, TripleName, MCTargetOptions()));
std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
std::unique_ptr<MCSubtargetInfo> STI(
TheTarget->createMCSubtargetInfo(TripleName, CPUName, ""));
auto Ctx = std::make_unique<MCContext>(Triple(TripleName), MAI.get(),
MRI.get(), STI.get());
int AsmPrinterVariant = MAI->getAssemblerDialect();
std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
Triple(TripleName), AsmPrinterVariant, *MAI, *MII, *MRI));
SmallVector<char, 64> InsnStr, AnnoStr;
raw_svector_ostream OS(InsnStr);
raw_svector_ostream Annotations(AnnoStr);
formatted_raw_ostream FormattedOS(OS);
char StrBuffer[128];
uint8_t Bytes[] = {0x04, 0x00, 0x80, 0xb0};
uint64_t InstSize = 0U;
MCInst Inst1, Inst2;
MCDisassembler::DecodeStatus Status;
// Test disassembler works as expected.
AnnoStr.clear();
InsnStr.clear();
std::unique_ptr<MCDisassembler> DisAsm1(
TheTarget->createMCDisassembler(*STI, *Ctx));
Status = DisAsm1->getInstruction(Inst1, InstSize, Bytes, 0, Annotations);
ASSERT_TRUE(Status == MCDisassembler::Success);
EXPECT_EQ(InstSize, 4U);
IP->printInst(&Inst1, 0U, Annotations.str(), *STI, FormattedOS);
ASSERT_TRUE(InsnStr.size() < (sizeof(StrBuffer) - 1));
std::memcpy(StrBuffer, InsnStr.data(), InsnStr.size());
StrBuffer[InsnStr.size()] = '\0';
EXPECT_EQ(StringRef(StrBuffer), "\ts_version UC_VERSION_GFX10");
// Test that second disassembler in same context works as expected.
AnnoStr.clear();
InsnStr.clear();
std::unique_ptr<MCDisassembler> DisAsm2(
TheTarget->createMCDisassembler(*STI, *Ctx));
Status = DisAsm2->getInstruction(Inst2, InstSize, Bytes, 0, Annotations);
ASSERT_TRUE(Status == MCDisassembler::Success);
EXPECT_EQ(InstSize, 4U);
IP->printInst(&Inst2, 0U, Annotations.str(), *STI, FormattedOS);
ASSERT_TRUE(InsnStr.size() < (sizeof(StrBuffer) - 1));
std::memcpy(StrBuffer, InsnStr.data(), InsnStr.size());
StrBuffer[InsnStr.size()] = '\0';
EXPECT_EQ(StringRef(StrBuffer), "\ts_version UC_VERSION_GFX10");
}
// Test UC_VERSION symbols can be overriden without crashing.
// There is no valid behaviour if symbols are redefined in this way.
TEST(AMDGPUDisassembler, UCVersionOverride) {
LLVMInitializeAMDGPUTargetInfo();
LLVMInitializeAMDGPUTargetMC();
LLVMInitializeAMDGPUDisassembler();
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
// Skip test if AMDGPU not built.
if (!TheTarget)
GTEST_SKIP();
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
std::unique_ptr<MCAsmInfo> MAI(
TheTarget->createMCAsmInfo(*MRI, TripleName, MCTargetOptions()));
std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
std::unique_ptr<MCSubtargetInfo> STI(
TheTarget->createMCSubtargetInfo(TripleName, CPUName, ""));
auto Ctx = std::make_unique<MCContext>(Triple(TripleName), MAI.get(),
MRI.get(), STI.get());
// Define custom UC_VERSION before initializing disassembler.
const uint8_t UC_VERSION_GFX10_DEFAULT = 0x04;
const uint8_t UC_VERSION_GFX10_NEW = 0x99;
auto Sym = Ctx->getOrCreateSymbol("UC_VERSION_GFX10");
Sym->setVariableValue(MCConstantExpr::create(UC_VERSION_GFX10_NEW, *Ctx));
int AsmPrinterVariant = MAI->getAssemblerDialect();
std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
Triple(TripleName), AsmPrinterVariant, *MAI, *MII, *MRI));
testing::internal::CaptureStderr();
std::unique_ptr<MCDisassembler> DisAsm(
TheTarget->createMCDisassembler(*STI, *Ctx));
std::string Output = testing::internal::GetCapturedStderr();
EXPECT_TRUE(Output.find("<unknown>:0: warning: unsupported redefinition of "
"UC_VERSION_GFX10") != std::string::npos);
SmallVector<char, 64> InsnStr, AnnoStr;
raw_svector_ostream OS(InsnStr);
raw_svector_ostream Annotations(AnnoStr);
formatted_raw_ostream FormattedOS(OS);
char StrBuffer[128];
// Decode S_VERSION instruction with original or custom version.
uint8_t Versions[] = {UC_VERSION_GFX10_DEFAULT, UC_VERSION_GFX10_NEW};
for (uint8_t Version : Versions) {
uint8_t Bytes[] = {Version, 0x00, 0x80, 0xb0};
uint64_t InstSize = 0U;
MCInst Inst;
AnnoStr.clear();
InsnStr.clear();
MCDisassembler::DecodeStatus Status =
DisAsm->getInstruction(Inst, InstSize, Bytes, 0, Annotations);
ASSERT_TRUE(Status == MCDisassembler::Success);
EXPECT_EQ(InstSize, 4U);
IP->printInst(&Inst, 0, Annotations.str(), *STI, FormattedOS);
ASSERT_TRUE(InsnStr.size() < (sizeof(StrBuffer) - 1));
std::memcpy(StrBuffer, InsnStr.data(), InsnStr.size());
StrBuffer[InsnStr.size()] = '\0';
if (Version == UC_VERSION_GFX10_DEFAULT)
EXPECT_EQ(StringRef(StrBuffer), "\ts_version UC_VERSION_GFX10");
else
EXPECT_EQ(StringRef(StrBuffer), "\ts_version 153");
}
}
|
