46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===--- StackExhaustionHandler.h - A utility for warning once when close to out
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// of stack space -------*- C++ -*-===//
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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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///
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/// \file
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/// Defines a utilitiy for warning once when close to out of stack space.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_BASIC_STACK_EXHAUSTION_HANDLER_H
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#define LLVM_CLANG_BASIC_STACK_EXHAUSTION_HANDLER_H
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#include "clang/Basic/Diagnostic.h"
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namespace clang {
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class StackExhaustionHandler {
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public:
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StackExhaustionHandler(DiagnosticsEngine &diags) : DiagsRef(diags) {}
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/// Run some code with "sufficient" stack space. (Currently, at least 256K
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/// is guaranteed). Produces a warning if we're low on stack space and
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/// allocates more in that case. Use this in code that may recurse deeply to
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/// avoid stack overflow.
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void runWithSufficientStackSpace(SourceLocation Loc,
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llvm::function_ref<void()> Fn);
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/// Check to see if we're low on stack space and produce a warning if we're
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/// low on stack space (Currently, at least 256Kis guaranteed).
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void warnOnStackNearlyExhausted(SourceLocation Loc);
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private:
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/// Warn that the stack is nearly exhausted.
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void warnStackExhausted(SourceLocation Loc);
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DiagnosticsEngine &DiagsRef;
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bool WarnedStackExhausted = false;
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};
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} // end namespace clang
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#endif // LLVM_CLANG_BASIC_STACK_EXHAUSTION_HANDLER_H
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