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462e58d3cb
My goal was to reduce the size of SILLocation. It now contains only of a storage union, which is basically a pointer and a bitfield containing the Kind, StorageKind and flags. By far, most locations are only single pointers to an AST node. For the few cases where more data needs to be stored, this data is allocated separately: with the SILModule's bump pointer allocator.
While working on this, I couldn't resist to do a major refactoring to simplify the code:
* removed unused stuff
* The term "DebugLoc" was used for 3 completely different things:
- for `struct SILLocation::DebugLoc` -> renamed it to `FilePosition`
- for `hasDebugLoc()`/`getDebugSourceLoc()` -> renamed it to `hasASTNodeForDebugging()`/`getSourceLocForDebugging()`
- for `class SILDebugLocation` -> kept it as it is (though, `SILScopedLocation` would be a better name, IMO)
* made SILLocation more "functional", i.e. replaced some setters with corresponding constructors
* replaced the hand-written bitfield `KindData` with C bitfields
* updated and improved comments
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
//===--- PrettyStackTrace.h - Crash trace information -----------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines SIL-specific RAII classes that give better diagnostic
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// output about when, exactly, a crash is occurring.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SIL_PRETTYSTACKTRACE_H
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#define SWIFT_SIL_PRETTYSTACKTRACE_H
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#include "swift/SIL/SILLocation.h"
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#include "swift/SIL/SILNode.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/PrettyStackTrace.h"
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namespace swift {
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class ASTContext;
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class SILFunction;
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void printSILLocationDescription(llvm::raw_ostream &out, SILLocation loc,
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ASTContext &ctx);
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/// PrettyStackTraceLocation - Observe that we are doing some
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/// processing starting at a SIL location.
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class PrettyStackTraceSILLocation : public llvm::PrettyStackTraceEntry {
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SILLocation Loc;
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const char *Action;
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ASTContext &Context;
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public:
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PrettyStackTraceSILLocation(const char *action, SILLocation loc,
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ASTContext &C)
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: Loc(loc), Action(action), Context(C) {}
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virtual void print(llvm::raw_ostream &OS) const override;
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};
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/// Observe that we are doing some processing of a SIL function.
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class PrettyStackTraceSILFunction : public llvm::PrettyStackTraceEntry {
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const SILFunction *func;
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/// An inline buffer of characters used if we are passed a twine.
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SmallString<256> data;
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/// This points either at a user provided const char * string or points at the
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/// inline message buffer that is initialized with data from a twine on
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/// construction.
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StringRef action;
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public:
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PrettyStackTraceSILFunction(const char *action, const SILFunction *func)
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: func(func), data(), action(action) {}
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PrettyStackTraceSILFunction(llvm::Twine &&twine, const SILFunction *func)
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: func(func), data(), action(twine.toNullTerminatedStringRef(data)) {}
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virtual void print(llvm::raw_ostream &os) const override;
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protected:
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void printFunctionInfo(llvm::raw_ostream &out) const;
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};
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/// Observe that we are visiting SIL nodes.
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class PrettyStackTraceSILNode : public llvm::PrettyStackTraceEntry {
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const SILNode *Node;
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const char *Action;
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public:
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PrettyStackTraceSILNode(const char *action, SILNodePointer node)
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: Node(node), Action(action) {}
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virtual void print(llvm::raw_ostream &OS) const override;
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};
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} // end namespace swift
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#endif
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