1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdint.h>
18
19 #include "art_method-inl.h"
20 #include "base/callee_save_type.h"
21 #include "callee_save_frame.h"
22 #include "common_runtime_test.h"
23 #include "quick/quick_method_frame_info.h"
24
25 namespace art {
26
27 class QuickTrampolineEntrypointsTest : public CommonRuntimeTest {
28 protected:
SetUpRuntimeOptions(RuntimeOptions * options)29 void SetUpRuntimeOptions(RuntimeOptions *options) override {
30 // Use 64-bit ISA for runtime setup to make method size potentially larger
31 // than necessary (rather than smaller) during CreateCalleeSaveMethod
32 options->push_back(std::make_pair("imageinstructionset", "x86_64"));
33 }
34
35 // Do not do any of the finalization. We don't want to run any code, we don't need the heap
36 // prepared, it actually will be a problem with setting the instruction set to x86_64 in
37 // SetUpRuntimeOptions.
FinalizeSetup()38 void FinalizeSetup() override {
39 ASSERT_EQ(InstructionSet::kX86_64, Runtime::Current()->GetInstructionSet());
40 }
41
CreateCalleeSaveMethod(InstructionSet isa,CalleeSaveType type)42 static ArtMethod* CreateCalleeSaveMethod(InstructionSet isa, CalleeSaveType type)
43 NO_THREAD_SAFETY_ANALYSIS {
44 Runtime* r = Runtime::Current();
45
46 Thread* t = Thread::Current();
47
48 ScopedObjectAccess soa(t);
49
50 r->SetInstructionSet(isa);
51 ArtMethod* save_method = r->CreateCalleeSaveMethod();
52 r->SetCalleeSaveMethod(save_method, type);
53
54 return save_method;
55 }
56
CheckPCOffset(InstructionSet isa,CalleeSaveType type,size_t pc_offset)57 static void CheckPCOffset(InstructionSet isa, CalleeSaveType type, size_t pc_offset)
58 NO_THREAD_SAFETY_ANALYSIS {
59 ArtMethod* save_method = CreateCalleeSaveMethod(isa, type);
60 QuickMethodFrameInfo frame_info = Runtime::Current()->GetRuntimeMethodFrameInfo(save_method);
61 EXPECT_EQ(frame_info.GetReturnPcOffset(), pc_offset)
62 << "Expected and real pc offset differs for " << type
63 << " core spills=" << std::hex << frame_info.CoreSpillMask()
64 << " fp spills=" << frame_info.FpSpillMask() << std::dec << " ISA " << isa;
65 }
66 };
67
68 // This test ensures that the constexpr specialization of the return PC offset computation in
69 // GetCalleeSavePCOffset is correct.
TEST_F(QuickTrampolineEntrypointsTest,ReturnPC)70 TEST_F(QuickTrampolineEntrypointsTest, ReturnPC) {
71 // Ensure that the computation in callee_save_frame.h correct.
72 // Note: we can only check against the kRuntimeISA, because the ArtMethod computation uses
73 // sizeof(void*), which is wrong when the target bitwidth is not the same as the host's.
74 CheckPCOffset(
75 kRuntimeISA,
76 CalleeSaveType::kSaveRefsAndArgs,
77 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveRefsAndArgs));
78 CheckPCOffset(
79 kRuntimeISA,
80 CalleeSaveType::kSaveRefsOnly,
81 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveRefsOnly));
82 CheckPCOffset(
83 kRuntimeISA,
84 CalleeSaveType::kSaveAllCalleeSaves,
85 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveAllCalleeSaves));
86 CheckPCOffset(
87 kRuntimeISA,
88 CalleeSaveType::kSaveEverything,
89 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverything));
90 CheckPCOffset(
91 kRuntimeISA,
92 CalleeSaveType::kSaveEverythingForClinit,
93 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverythingForClinit));
94 CheckPCOffset(
95 kRuntimeISA,
96 CalleeSaveType::kSaveEverythingForSuspendCheck,
97 RuntimeCalleeSaveFrame::GetReturnPcOffset(CalleeSaveType::kSaveEverythingForSuspendCheck));
98 }
99
100 } // namespace art
101