839e845277
Several data formatters assume their types are in the Target's scratch AST and build new types from that scratch AST instance. However, types from different ASTs shouldn't be mixed, so this (unchecked) assumption may lead to problems if we ever have more than one scratch AST or someone somehow invokes data formatters on a type that are not in the scratch AST. Instead we can use in all the formatters just the TypeSystem of the type we're formatting. That's much simpler and avoids all the headache of finding the right TypeSystem that matches the one of the formatted type. Right now LLDB only has one scratch TypeSystemClang instance and we format only types that are in the scratch AST, so this doesn't change anything in the current way LLDB works. The intention here is to allow follow up refactorings that introduce multiple scratch ASTs with the same Target. Differential Revision: https://reviews.llvm.org/D92757
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
//===-- CoreMedia.cpp -----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "CoreMedia.h"
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#include "lldb/Utility/Flags.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Symbol/TypeSystem.h"
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#include "lldb/Target/Target.h"
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#include <inttypes.h>
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::formatters;
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bool lldb_private::formatters::CMTimeSummaryProvider(
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ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
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CompilerType type = valobj.GetCompilerType();
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if (!type.IsValid())
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return false;
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TypeSystem *type_system = type.GetTypeSystem();
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// fetch children by offset to compensate for potential lack of debug info
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auto int64_ty =
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type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 64);
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auto int32_ty =
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type_system->GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 32);
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auto value_sp(valobj.GetSyntheticChildAtOffset(0, int64_ty, true));
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auto timescale_sp(valobj.GetSyntheticChildAtOffset(8, int32_ty, true));
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auto flags_sp(valobj.GetSyntheticChildAtOffset(12, int32_ty, true));
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if (!value_sp || !timescale_sp || !flags_sp)
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return false;
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auto value = value_sp->GetValueAsUnsigned(0);
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auto timescale = (int32_t)timescale_sp->GetValueAsUnsigned(
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0); // the timescale specifies the fraction of a second each unit in the
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// numerator occupies
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auto flags = Flags(flags_sp->GetValueAsUnsigned(0) &
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0x00000000000000FF); // the flags I need sit in the LSB
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const unsigned int FlagPositiveInf = 4;
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const unsigned int FlagNegativeInf = 8;
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const unsigned int FlagIndefinite = 16;
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if (flags.AnySet(FlagIndefinite)) {
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stream.Printf("indefinite");
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return true;
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}
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if (flags.AnySet(FlagPositiveInf)) {
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stream.Printf("+oo");
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return true;
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}
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if (flags.AnySet(FlagNegativeInf)) {
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stream.Printf("-oo");
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return true;
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}
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if (timescale == 0)
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return false;
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switch (timescale) {
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case 0:
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return false;
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case 1:
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stream.Printf("%" PRId64 " seconds", value);
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return true;
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case 2:
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stream.Printf("%" PRId64 " half seconds", value);
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return true;
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case 3:
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stream.Printf("%" PRId64 " third%sof a second", value,
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value == 1 ? " " : "s ");
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return true;
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default:
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stream.Printf("%" PRId64 " %" PRId32 "th%sof a second", value, timescale,
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value == 1 ? " " : "s ");
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return true;
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}
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}
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