1 //===-- CoreMedia.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 "CoreMedia.h"
10
11 #include "lldb/Utility/Flags.h"
12 #include "lldb/Utility/Log.h"
13
14 #include "lldb/Symbol/TypeSystem.h"
15 #include "lldb/Target/Target.h"
16 #include <cinttypes>
17
18 using namespace lldb;
19 using namespace lldb_private;
20 using namespace lldb_private::formatters;
21
CMTimeSummaryProvider(ValueObject & valobj,Stream & stream,const TypeSummaryOptions & options)22 bool lldb_private::formatters::CMTimeSummaryProvider(
23 ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
24 CompilerType type = valobj.GetCompilerType();
25 if (!type.IsValid())
26 return false;
27
28 TypeSystem *type_system = type.GetTypeSystem();
29 // fetch children by offset to compensate for potential lack of debug info
30 auto int64_ty =
31 type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 64);
32 auto int32_ty =
33 type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 32);
34
35 auto value_sp(valobj.GetSyntheticChildAtOffset(0, int64_ty, true));
36 auto timescale_sp(valobj.GetSyntheticChildAtOffset(8, int32_ty, true));
37 auto flags_sp(valobj.GetSyntheticChildAtOffset(12, int32_ty, true));
38
39 if (!value_sp || !timescale_sp || !flags_sp)
40 return false;
41
42 auto value = value_sp->GetValueAsUnsigned(0);
43 auto timescale = (int32_t)timescale_sp->GetValueAsUnsigned(
44 0); // the timescale specifies the fraction of a second each unit in the
45 // numerator occupies
46 auto flags = Flags(flags_sp->GetValueAsUnsigned(0) &
47 0x00000000000000FF); // the flags I need sit in the LSB
48
49 const unsigned int FlagPositiveInf = 4;
50 const unsigned int FlagNegativeInf = 8;
51 const unsigned int FlagIndefinite = 16;
52
53 if (flags.AnySet(FlagIndefinite)) {
54 stream.Printf("indefinite");
55 return true;
56 }
57
58 if (flags.AnySet(FlagPositiveInf)) {
59 stream.Printf("+oo");
60 return true;
61 }
62
63 if (flags.AnySet(FlagNegativeInf)) {
64 stream.Printf("-oo");
65 return true;
66 }
67
68 if (timescale == 0)
69 return false;
70
71 switch (timescale) {
72 case 0:
73 return false;
74 case 1:
75 stream.Printf("%" PRId64 " seconds", value);
76 return true;
77 case 2:
78 stream.Printf("%" PRId64 " half seconds", value);
79 return true;
80 case 3:
81 stream.Printf("%" PRId64 " third%sof a second", value,
82 value == 1 ? " " : "s ");
83 return true;
84 default:
85 stream.Printf("%" PRId64 " %" PRId32 "th%sof a second", value, timescale,
86 value == 1 ? " " : "s ");
87 return true;
88 }
89 }
90