| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_DEVELOPER_DEBUG_DEBUG_AGENT_ZIRCON_LIMBO_PROVIDER_H_ |
| #define SRC_DEVELOPER_DEBUG_DEBUG_AGENT_ZIRCON_LIMBO_PROVIDER_H_ |
| |
| #include <fidl/fuchsia.exception/cpp/fidl.h> |
| #include <fidl/fuchsia.io/cpp/fidl.h> |
| |
| #include <map> |
| #include <vector> |
| |
| #include "src/developer/debug/debug_agent/limbo_provider.h" |
| |
| namespace debug_agent { |
| |
| // In charge of providing access to the ProcessLimbo. |
| // |
| // Fuchsia can be configured to keep processes that have excepted in a suspension state, called |
| // Limbo. This provides the possibility for debuggers to attach to those process way after the |
| // exception occurred. We call this process Just In Time Debugging (JITD). |
| class ZirconLimboProvider final : public LimboProvider { |
| public: |
| explicit ZirconLimboProvider(fidl::UnownedClientEnd<fuchsia_io::Directory> svc_dir); |
| ~ZirconLimboProvider() override = default; |
| |
| // LimboProvider implementation. |
| bool Valid() const override { return valid_; } |
| bool IsProcessInLimbo(zx_koid_t process_koid) const override; |
| const RecordMap& GetLimboRecords() const override { return limbo_; } |
| fit::result<debug::Status, RetrievedException> RetrieveException(zx_koid_t process_koid) override; |
| debug::Status ReleaseProcess(zx_koid_t process_koid) override; |
| |
| private: |
| void WatchActive(); |
| void WatchLimbo(); |
| |
| bool valid_ = false; |
| |
| // Because the Process Limbo uses hanging gets (async callbacks) and this class exposes a |
| // synchronous inteface, we need to keep track of the current state in order to be able to |
| // return it immediatelly. |
| RecordMap limbo_; |
| |
| bool is_limbo_active_ = false; |
| |
| fidl::UnownedClientEnd<fuchsia_io::Directory> svc_dir_; |
| |
| fidl::Client<fuchsia_exception::ProcessLimbo> connection_; |
| }; |
| |
| } // namespace debug_agent |
| |
| #endif // SRC_DEVELOPER_DEBUG_DEBUG_AGENT_ZIRCON_LIMBO_PROVIDER_H_ |