| //===-- SingleStepCheck.h ------------------------------------- -*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef liblldb_SingleStepCheck_H_ |
| #define liblldb_SingleStepCheck_H_ |
| |
| namespace lldb_private { |
| namespace process_linux { |
| |
| namespace impl { |
| extern bool SingleStepWorkaroundNeeded(); |
| } |
| |
| // arm64 linux had a bug which prevented single-stepping and watchpoints from |
| // working on non-boot |
| // cpus, due to them being incorrectly initialized after coming out of suspend. |
| // This issue is |
| // particularly affecting android M, which uses suspend ("doze mode") quite |
| // aggressively. This |
| // code detects that situation and makes single-stepping work by doing all the |
| // step operations on |
| // the boot cpu. |
| // |
| // The underlying issue has been fixed in android N and linux 4.4. This code can |
| // be removed once |
| // these systems become obsolete. |
| inline bool SingleStepWorkaroundNeeded() { |
| static bool value = impl::SingleStepWorkaroundNeeded(); |
| return value; |
| } |
| } // end namespace process_linux |
| } // end namespace lldb_private |
| |
| #endif // #ifndef liblldb_SingleStepCheck_H_ |