| 1 | //===- Utils.h --------------------------------------------------*- C++ -*-===// |
|---|---|
| 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 | #ifndef LLVM_DWARFLINKER_UTILS_H |
| 10 | #define LLVM_DWARFLINKER_UTILS_H |
| 11 | |
| 12 | #include "llvm/ADT/SmallString.h" |
| 13 | #include "llvm/ADT/Twine.h" |
| 14 | #include "llvm/Support/Error.h" |
| 15 | #include "llvm/Support/FileSystem.h" |
| 16 | #include "llvm/Support/Path.h" |
| 17 | |
| 18 | namespace llvm { |
| 19 | namespace dwarf_linker { |
| 20 | |
| 21 | /// This function calls \p Iteration() until it returns false. |
| 22 | /// If number of iterations exceeds \p MaxCounter then an Error is returned. |
| 23 | /// This function should be used for loops which assumed to have number of |
| 24 | /// iterations significantly smaller than \p MaxCounter to avoid infinite |
| 25 | /// looping in error cases. |
| 26 | inline Error finiteLoop(function_ref<Expected<bool>()> Iteration, |
| 27 | size_t MaxCounter = 100000) { |
| 28 | size_t iterationsCounter = 0; |
| 29 | while (iterationsCounter++ < MaxCounter) { |
| 30 | Expected<bool> IterationResultOrError = Iteration(); |
| 31 | if (!IterationResultOrError) |
| 32 | return IterationResultOrError.takeError(); |
| 33 | if (!IterationResultOrError.get()) |
| 34 | return Error::success(); |
| 35 | } |
| 36 | return createStringError(EC: std::errc::invalid_argument, Fmt: "Infinite recursion"); |
| 37 | } |
| 38 | |
| 39 | /// Make a best effort to guess the |
| 40 | /// Xcode.app/Contents/Developer/Toolchains/ path from an SDK path. |
| 41 | inline SmallString<128> guessToolchainBaseDir(StringRef SysRoot) { |
| 42 | SmallString<128> Result; |
| 43 | // Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk |
| 44 | StringRef Base = sys::path::parent_path(path: SysRoot); |
| 45 | if (sys::path::filename(path: Base) != "SDKs") |
| 46 | return Result; |
| 47 | Base = sys::path::parent_path(path: Base); |
| 48 | Result = Base; |
| 49 | Result += "/Toolchains"; |
| 50 | return Result; |
| 51 | } |
| 52 | |
| 53 | inline bool isPathAbsoluteOnWindowsOrPosix(const Twine &Path) { |
| 54 | // Debug info can contain paths from any OS, not necessarily |
| 55 | // an OS we're currently running on. Moreover different compilation units can |
| 56 | // be compiled on different operating systems and linked together later. |
| 57 | return sys::path::is_absolute(path: Path, style: sys::path::Style::posix) || |
| 58 | sys::path::is_absolute(path: Path, style: sys::path::Style::windows); |
| 59 | } |
| 60 | |
| 61 | } // end of namespace dwarf_linker |
| 62 | } // end of namespace llvm |
| 63 | |
| 64 | #endif // LLVM_DWARFLINKER_UTILS_H |
| 65 |