1 //===-- RichManglingContextTest.cpp ---------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "lldb/Core/RichManglingContext.h"
10 
11 #include "lldb/Utility/ConstString.h"
12 
13 #include "gtest/gtest.h"
14 
15 using namespace lldb;
16 using namespace lldb_private;
17 
18 TEST(RichManglingContextTest, Basic) {
19   RichManglingContext RMC;
20   ConstString mangled("_ZN3foo3barEv");
21   EXPECT_TRUE(RMC.FromItaniumName(mangled));
22 
23   EXPECT_TRUE(RMC.IsFunction());
24   EXPECT_FALSE(RMC.IsCtorOrDtor());
25 
26   RMC.ParseFunctionDeclContextName();
27   EXPECT_EQ("foo", RMC.GetBufferRef());
28 
29   RMC.ParseFunctionBaseName();
30   EXPECT_EQ("bar", RMC.GetBufferRef());
31 
32   RMC.ParseFullName();
33   EXPECT_EQ("foo::bar()", RMC.GetBufferRef());
34 }
35 
36 TEST(RichManglingContextTest, FromCxxMethodName) {
37   RichManglingContext ItaniumRMC;
38   ConstString mangled("_ZN3foo3barEv");
39   EXPECT_TRUE(ItaniumRMC.FromItaniumName(mangled));
40 
41   RichManglingContext CxxMethodRMC;
42   ConstString demangled("foo::bar()");
43   EXPECT_TRUE(CxxMethodRMC.FromCxxMethodName(demangled));
44 
45   EXPECT_TRUE(ItaniumRMC.IsFunction() == CxxMethodRMC.IsFunction());
46   EXPECT_TRUE(ItaniumRMC.IsCtorOrDtor() == CxxMethodRMC.IsCtorOrDtor());
47 
48   ItaniumRMC.ParseFunctionDeclContextName();
49   CxxMethodRMC.ParseFunctionDeclContextName();
50   EXPECT_TRUE(ItaniumRMC.GetBufferRef() == CxxMethodRMC.GetBufferRef());
51 
52   ItaniumRMC.ParseFunctionBaseName();
53   CxxMethodRMC.ParseFunctionBaseName();
54   EXPECT_TRUE(ItaniumRMC.GetBufferRef() == CxxMethodRMC.GetBufferRef());
55 
56   ItaniumRMC.ParseFullName();
57   CxxMethodRMC.ParseFullName();
58   EXPECT_TRUE(ItaniumRMC.GetBufferRef() == CxxMethodRMC.GetBufferRef());
59 
60   // Construct with a random name.
61   {
62     RichManglingContext CxxMethodRMC;
63     EXPECT_TRUE(CxxMethodRMC.FromCxxMethodName(ConstString("X")));
64 
65     // We expect it is not a function.
66     EXPECT_FALSE(CxxMethodRMC.IsFunction());
67   }
68 
69   // Construct with a function without a context.
70   {
71     RichManglingContext CxxMethodRMC;
72     EXPECT_TRUE(CxxMethodRMC.FromCxxMethodName(
73         ConstString("void * operator new(unsigned __int64)")));
74 
75     // We expect it is a function.
76     EXPECT_TRUE(CxxMethodRMC.IsFunction());
77 
78     // We expect its context is empty.
79     CxxMethodRMC.ParseFunctionDeclContextName();
80     EXPECT_TRUE(CxxMethodRMC.GetBufferRef().empty());
81   }
82 }
83 
84 TEST(RichManglingContextTest, SwitchProvider) {
85   RichManglingContext RMC;
86   llvm::StringRef mangled = "_ZN3foo3barEv";
87   llvm::StringRef demangled = "foo::bar()";
88 
89   EXPECT_TRUE(RMC.FromItaniumName(ConstString(mangled)));
90   RMC.ParseFullName();
91   EXPECT_EQ("foo::bar()", RMC.GetBufferRef());
92 
93   EXPECT_TRUE(RMC.FromCxxMethodName(ConstString(demangled)));
94   RMC.ParseFullName();
95   EXPECT_EQ("foo::bar()", RMC.GetBufferRef());
96 
97   EXPECT_TRUE(RMC.FromItaniumName(ConstString(mangled)));
98   RMC.ParseFullName();
99   EXPECT_EQ("foo::bar()", RMC.GetBufferRef());
100 }
101 
102 TEST(RichManglingContextTest, IPDRealloc) {
103   // The demangled name should fit into the Itanium default buffer.
104   const char *ShortMangled = "_ZN3foo3barEv";
105 
106   // The demangled name for this will certainly not fit into the default buffer.
107   const char *LongMangled =
108       "_ZNK3shk6detail17CallbackPublisherIZNS_5ThrowERKNSt15__exception_"
109       "ptr13exception_ptrEEUlOT_E_E9SubscribeINS0_9ConcatMapINS0_"
110       "18CallbackSubscriberIZNS_6GetAllIiNS1_IZZNS_9ConcatMapIZNS_6ConcatIJNS1_"
111       "IZZNS_3MapIZZNS_7IfEmptyIS9_EEDaS7_ENKUlS6_E_clINS1_IZZNS_4TakeIiEESI_"
112       "S7_ENKUlS6_E_clINS1_IZZNS_6FilterIZNS_9ElementAtEmEUlS7_E_EESI_S7_"
113       "ENKUlS6_E_clINS1_IZZNSL_ImEESI_S7_ENKUlS6_E_clINS1_IZNS_4FromINS0_"
114       "22InfiniteRangeContainerIiEEEESI_S7_EUlS7_E_EEEESI_S6_EUlS7_E_EEEESI_S6_"
115       "EUlS7_E_EEEESI_S6_EUlS7_E_EEEESI_S6_EUlS7_E_EESI_S7_ENKUlS6_E_clIS14_"
116       "EESI_S6_EUlS7_E_EERNS1_IZZNSH_IS9_EESI_S7_ENKSK_IS14_EESI_S6_EUlS7_E0_"
117       "EEEEESI_DpOT_EUlS7_E_EESI_S7_ENKUlS6_E_clINS1_IZNS_5StartIJZNS_"
118       "4JustIJS19_S1C_EEESI_S1F_EUlvE_ZNS1K_IJS19_S1C_EEESI_S1F_EUlvE0_EEESI_"
119       "S1F_EUlS7_E_EEEESI_S6_EUlS7_E_EEEESt6vectorIS6_SaIS6_EERKT0_NS_"
120       "12ElementCountEbEUlS7_E_ZNSD_IiS1Q_EES1T_S1W_S1X_bEUlOS3_E_ZNSD_IiS1Q_"
121       "EES1T_S1W_S1X_bEUlvE_EES1G_S1O_E25ConcatMapValuesSubscriberEEEDaS7_";
122 
123   RichManglingContext RMC;
124 
125   // Demangle the short one.
126   EXPECT_TRUE(RMC.FromItaniumName(ConstString(ShortMangled)));
127   RMC.ParseFullName();
128   const char *ShortDemangled = RMC.GetBufferRef().data();
129 
130   // Demangle the long one.
131   EXPECT_TRUE(RMC.FromItaniumName(ConstString(LongMangled)));
132   RMC.ParseFullName();
133   const char *LongDemangled = RMC.GetBufferRef().data();
134 
135   // Make sure a new buffer was allocated or the default buffer was extended.
136   bool AllocatedNewBuffer = (ShortDemangled != LongDemangled);
137   bool ExtendedExistingBuffer = (strlen(LongDemangled) > 2048);
138   EXPECT_TRUE(AllocatedNewBuffer || ExtendedExistingBuffer);
139 }
140