ee11ef6dc0
The dynamic linker on Darwin, dyld, can provide status of the process state for a few significant points early on, most importantly, when libSystem has been initialized and it is safe to call functions behind the scenes. Pipe this information up from debugserver to DynamicLoaderMacOS, for the DynamicLoader::IsFullyInitialized() method, then have Thread::SafeToCallFunctions use this information. Finally, for the two utility functions in the AppleObjCRuntimeV2 LanguageRuntime plugin that I was fixing, call this method before running our utility functions to collect the list of objc classes registered in the runtime. User expressions will still be allowed to run any time - we assume the user knows what they are doing - but these two additional utility functions that they are unaware of will be limited by this state. Differential Revision: https://reviews.llvm.org/D139054 rdar://102436092 can probably make function calls.
115 lines
4.0 KiB
C++
115 lines
4.0 KiB
C++
//===-- DynamicLoaderMacOS.h -------------------------------*- 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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// This is the DynamicLoader plugin for Darwin (macOS / iPhoneOS / tvOS /
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// watchOS / BridgeOS)
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// platforms late 2016 and newer, where lldb will call dyld SPI functions to get
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// information about shared libraries, information about the shared cache, and
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// the _dyld_debugger_notification function we put a breakpoint on give us an
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// array of load addresses for solibs loaded and unloaded. The SPI will tell us
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// about both dyld and the executable, in addition to all of the usual solibs.
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#ifndef LLDB_SOURCE_PLUGINS_DYNAMICLOADER_MACOSX_DYLD_DYNAMICLOADERMACOS_H
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#define LLDB_SOURCE_PLUGINS_DYNAMICLOADER_MACOSX_DYLD_DYNAMICLOADERMACOS_H
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#include <mutex>
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#include <vector>
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#include "lldb/Target/DynamicLoader.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/StructuredData.h"
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#include "lldb/Utility/UUID.h"
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#include "DynamicLoaderDarwin.h"
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class DynamicLoaderMacOS : public lldb_private::DynamicLoaderDarwin {
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public:
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DynamicLoaderMacOS(lldb_private::Process *process);
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~DynamicLoaderMacOS() override;
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// Static Functions
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static void Initialize();
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static void Terminate();
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static llvm::StringRef GetPluginNameStatic() { return "macos-dyld"; }
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static llvm::StringRef GetPluginDescriptionStatic();
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static lldb_private::DynamicLoader *
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CreateInstance(lldb_private::Process *process, bool force);
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/// Called after attaching a process.
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///
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/// Allow DynamicLoader plug-ins to execute some code after
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/// attaching to a process.
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bool ProcessDidExec() override;
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lldb_private::Status CanLoadImage() override;
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bool GetSharedCacheInformation(
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lldb::addr_t &base_address, lldb_private::UUID &uuid,
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lldb_private::LazyBool &using_shared_cache,
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lldb_private::LazyBool &private_shared_cache) override;
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// PluginInterface protocol
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llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
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protected:
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void PutToLog(lldb_private::Log *log) const;
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void DoInitialImageFetch() override;
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bool NeedToDoInitialImageFetch() override;
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bool DidSetNotificationBreakpoint() override;
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bool SetDYLDHandoverBreakpoint(lldb::addr_t notification_address);
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void ClearDYLDHandoverBreakpoint();
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void AddBinaries(const std::vector<lldb::addr_t> &load_addresses);
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void DoClear() override;
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bool IsFullyInitialized() override;
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static bool
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NotifyBreakpointHit(void *baton,
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lldb_private::StoppointCallbackContext *context,
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lldb::user_id_t break_id, lldb::user_id_t break_loc_id);
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bool SetNotificationBreakpoint() override;
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void ClearNotificationBreakpoint() override;
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void UpdateImageInfosHeaderAndLoadCommands(ImageInfo::collection &image_infos,
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uint32_t infos_count,
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bool update_executable);
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lldb::addr_t
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GetDyldLockVariableAddressFromModule(lldb_private::Module *module);
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uint32_t m_image_infos_stop_id; // The Stop ID the last time we
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// loaded/unloaded images
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lldb::user_id_t m_break_id;
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lldb::user_id_t m_dyld_handover_break_id;
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mutable std::recursive_mutex m_mutex;
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lldb::addr_t m_maybe_image_infos_address; // If dyld is still maintaining the
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// all_image_infos address, store it
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// here so we can use it to detect
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// exec's when talking to
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// debugservers that don't support
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// the "reason:exec" annotation.
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bool m_libsystem_fully_initalized;
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};
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#endif // LLDB_SOURCE_PLUGINS_DYNAMICLOADER_MACOSX_DYLD_DYNAMICLOADERMACOS_H
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