aboutsummaryrefslogtreecommitdiff
path: root/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h
diff options
context:
space:
mode:
authorEd Maste <emaste@FreeBSD.org>2016-01-03 20:36:46 +0000
committerEd Maste <emaste@FreeBSD.org>2016-01-03 20:36:46 +0000
commit3bd2e91faeb9eeec1aae82c64a3253afff551cfd (patch)
tree5a3e741e28a6d673fdec1bfcc97391459e65b9d0 /source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h
parente81d9d49145e432d917eea3a70d2ae74dcad1d89 (diff)
downloadsrc-3bd2e91faeb9eeec1aae82c64a3253afff551cfd.tar.gz
src-3bd2e91faeb9eeec1aae82c64a3253afff551cfd.zip
Un-trim part of lldb trunk r256633
This was stripped in r292932 but is used in the regular configuration of LLDB. Obtained from: https://llvm.org/svn/llvm-project/lldb/trunk@256633
Notes
Notes: svn path=/vendor/lldb/dist/; revision=293116
Diffstat (limited to 'source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h')
-rw-r--r--source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h209
1 files changed, 209 insertions, 0 deletions
diff --git a/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h b/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h
new file mode 100644
index 000000000000..42d3461ddfa5
--- /dev/null
+++ b/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCTrampolineHandler.h
@@ -0,0 +1,209 @@
+//===-- AppleObjCTrampolineHandler.h ----------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef lldb_AppleObjCTrampolineHandler_h_
+#define lldb_AppleObjCTrampolineHandler_h_
+
+// C Includes
+// C++ Includes
+#include <map>
+#include <vector>
+
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-public.h"
+#include "lldb/Host/Mutex.h"
+#include "lldb/Expression/UtilityFunction.h"
+
+namespace lldb_private
+{
+
+class AppleObjCTrampolineHandler {
+public:
+ AppleObjCTrampolineHandler (const lldb::ProcessSP &process_sp,
+ const lldb::ModuleSP &objc_module_sp);
+
+ ~AppleObjCTrampolineHandler();
+
+ lldb::ThreadPlanSP
+ GetStepThroughDispatchPlan (Thread &thread,
+ bool stop_others);
+
+ FunctionCaller *
+ GetLookupImplementationFunctionCaller ();
+
+ bool
+ AddrIsMsgForward (lldb::addr_t addr) const
+ {
+ return (addr == m_msg_forward_addr || addr == m_msg_forward_stret_addr);
+ }
+
+ struct DispatchFunction {
+ public:
+ typedef enum
+ {
+ eFixUpNone,
+ eFixUpFixed,
+ eFixUpToFix
+ } FixUpState;
+
+ const char *name;
+ bool stret_return;
+ bool is_super;
+ bool is_super2;
+ FixUpState fixedup;
+ };
+
+ lldb::addr_t
+ SetupDispatchFunction (Thread &thread, ValueList &dispatch_values);
+
+private:
+ static const char *g_lookup_implementation_function_name;
+ static const char *g_lookup_implementation_function_code;
+ static const char *g_lookup_implementation_with_stret_function_code;
+ static const char *g_lookup_implementation_no_stret_function_code;
+
+ class AppleObjCVTables
+ {
+ public:
+ // These come from objc-gdb.h.
+ enum VTableFlags
+ {
+ eOBJC_TRAMPOLINE_MESSAGE = (1<<0), // trampoline acts like objc_msgSend
+ eOBJC_TRAMPOLINE_STRET = (1<<1), // trampoline is struct-returning
+ eOBJC_TRAMPOLINE_VTABLE = (1<<2) // trampoline is vtable dispatcher
+ };
+
+ private:
+ struct VTableDescriptor
+ {
+ VTableDescriptor(uint32_t in_flags, lldb::addr_t in_code_start) :
+ flags(in_flags),
+ code_start(in_code_start) {}
+
+ uint32_t flags;
+ lldb::addr_t code_start;
+ };
+
+ class VTableRegion
+ {
+ public:
+ VTableRegion() :
+ m_valid (false),
+ m_owner (NULL),
+ m_header_addr (LLDB_INVALID_ADDRESS),
+ m_code_start_addr(0),
+ m_code_end_addr (0),
+ m_next_region (0)
+ {}
+
+ VTableRegion(AppleObjCVTables *owner, lldb::addr_t header_addr);
+
+ void SetUpRegion();
+
+ lldb::addr_t GetNextRegionAddr ()
+ {
+ return m_next_region;
+ }
+
+ lldb::addr_t
+ GetCodeStart ()
+ {
+ return m_code_start_addr;
+ }
+
+ lldb::addr_t
+ GetCodeEnd ()
+ {
+ return m_code_end_addr;
+ }
+
+ uint32_t
+ GetFlagsForVTableAtAddress (lldb::addr_t address)
+ {
+ return 0;
+ }
+
+ bool
+ IsValid ()
+ {
+ return m_valid;
+ }
+
+ bool
+ AddressInRegion (lldb::addr_t addr, uint32_t &flags);
+
+ void
+ Dump (Stream &s);
+
+ public:
+ bool m_valid;
+ AppleObjCVTables *m_owner;
+ lldb::addr_t m_header_addr;
+ lldb::addr_t m_code_start_addr;
+ lldb::addr_t m_code_end_addr;
+ std::vector<VTableDescriptor> m_descriptors;
+ lldb::addr_t m_next_region;
+ };
+
+ public:
+ AppleObjCVTables(const lldb::ProcessSP &process_sp,
+ const lldb::ModuleSP &objc_module_sp);
+
+ ~AppleObjCVTables();
+
+ bool
+ InitializeVTableSymbols ();
+
+ static bool RefreshTrampolines (void *baton,
+ StoppointCallbackContext *context,
+ lldb::user_id_t break_id,
+ lldb::user_id_t break_loc_id);
+ bool
+ ReadRegions ();
+
+ bool
+ ReadRegions (lldb::addr_t region_addr);
+
+ bool
+ IsAddressInVTables (lldb::addr_t addr, uint32_t &flags);
+
+ lldb::ProcessSP
+ GetProcessSP ()
+ {
+ return m_process_wp.lock();
+ }
+
+ private:
+ lldb::ProcessWP m_process_wp;
+ typedef std::vector<VTableRegion> region_collection;
+ lldb::addr_t m_trampoline_header;
+ lldb::break_id_t m_trampolines_changed_bp_id;
+ region_collection m_regions;
+ lldb::ModuleSP m_objc_module_sp;
+ };
+
+ static const DispatchFunction g_dispatch_functions[];
+
+ typedef std::map<lldb::addr_t, int> MsgsendMap; // This table maps an dispatch fn address to the index in g_dispatch_functions
+ MsgsendMap m_msgSend_map;
+ lldb::ProcessWP m_process_wp;
+ lldb::ModuleSP m_objc_module_sp;
+ std::unique_ptr<UtilityFunction> m_impl_code;
+ Mutex m_impl_function_mutex;
+ lldb::addr_t m_impl_fn_addr;
+ lldb::addr_t m_impl_stret_fn_addr;
+ lldb::addr_t m_msg_forward_addr;
+ lldb::addr_t m_msg_forward_stret_addr;
+ std::unique_ptr<AppleObjCVTables> m_vtables_ap;
+};
+
+} // namespace lldb_private
+
+#endif // lldb_AppleObjCTrampolineHandler_h_