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//===--- FunctionReplacement.cpp ------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/Runtime/FunctionReplacement.h"
#include "SwiftTLSContext.h"
using namespace swift;
using namespace swift::runtime;
char *swift::swift_getFunctionReplacement(char **ReplFnPtr, char *CurrFn) {
char *ReplFn = *ReplFnPtr;
char *RawReplFn = ReplFn;
#if SWIFT_PTRAUTH
RawReplFn = ptrauth_strip(RawReplFn, ptrauth_key_function_pointer);
#endif
if (RawReplFn == CurrFn)
return nullptr;
auto &ctx = SwiftTLSContext::get();
if (ctx.CallOriginalOfReplacedFunction) {
ctx.CallOriginalOfReplacedFunction = false;
return nullptr;
}
return ReplFn;
}
char *swift::swift_getOrigOfReplaceable(char **OrigFnPtr) {
char *OrigFn = *OrigFnPtr;
SwiftTLSContext::get().CallOriginalOfReplacedFunction = true;
return OrigFn;
}
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