1 //===-- AppleGetThreadItemInfoHandler.h ----------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef lldb_AppleGetThreadItemInfoHandler_h_
11 #define lldb_AppleGetThreadItemInfoHandler_h_
17 // Other libraries and framework includes
19 #include "lldb/lldb-public.h"
20 #include "lldb/Core/Error.h"
21 #include "lldb/Host/Mutex.h"
22 #include "lldb/Symbol/CompilerType.h"
24 // This class will insert a UtilityFunction into the inferior process for
25 // calling libBacktraceRecording's __introspection_dispatch_thread_get_item_info()
26 // function. The function in the inferior will return a struct by value
27 // with these members:
29 // struct get_thread_item_info_return_values
31 // introspection_dispatch_item_info_ref *item_buffer;
32 // uint64_t item_buffer_size;
35 // The item_buffer pointer is an address in the inferior program's address
36 // space (item_buffer_size in size) which must be mach_vm_deallocate'd by
39 // The AppleGetThreadItemInfoHandler object should persist so that the UtilityFunction
40 // can be reused multiple times.
42 namespace lldb_private
45 class AppleGetThreadItemInfoHandler {
48 AppleGetThreadItemInfoHandler (lldb_private::Process *process);
50 ~AppleGetThreadItemInfoHandler();
52 struct GetThreadItemInfoReturnInfo
54 lldb::addr_t item_buffer_ptr; /* the address of the item buffer from libBacktraceRecording */
55 lldb::addr_t item_buffer_size; /* the size of the item buffer from libBacktraceRecording */
57 GetThreadItemInfoReturnInfo() :
58 item_buffer_ptr(LLDB_INVALID_ADDRESS),
63 //----------------------------------------------------------
64 /// Get the information about a work item by calling
65 /// __introspection_dispatch_thread_get_item_info. If there's a page of
66 /// memory that needs to be freed, pass in the address and size and it will
67 /// be freed before getting the list of queues.
69 /// @param [in] thread_id
70 /// The thread to get the extended backtrace for.
72 /// @param [in] page_to_free
73 /// An address of an inferior process vm page that needs to be deallocated,
74 /// LLDB_INVALID_ADDRESS if this is not needed.
76 /// @param [in] page_to_free_size
77 /// The size of the vm page that needs to be deallocated if an address was
78 /// passed in to page_to_free.
80 /// @param [out] error
81 /// This object will be updated with the error status / error string from any failures encountered.
84 /// The result of the inferior function call execution. If there was a failure of any kind while getting
85 /// the information, the item_buffer_ptr value will be LLDB_INVALID_ADDRESS.
86 //----------------------------------------------------------
87 GetThreadItemInfoReturnInfo
88 GetThreadItemInfo (Thread &thread, lldb::tid_t thread_id, lldb::addr_t page_to_free, uint64_t page_to_free_size, lldb_private::Error &error);
97 SetupGetThreadItemInfoFunction (Thread &thread, ValueList &get_thread_item_info_arglist);
99 static const char *g_get_thread_item_info_function_name;
100 static const char *g_get_thread_item_info_function_code;
102 lldb_private::Process *m_process;
103 std::unique_ptr<UtilityFunction> m_get_thread_item_info_impl_code;
104 Mutex m_get_thread_item_info_function_mutex;
106 lldb::addr_t m_get_thread_item_info_return_buffer_addr;
107 Mutex m_get_thread_item_info_retbuffer_mutex;
111 } // using namespace lldb_private
113 #endif // lldb_AppleGetThreadItemInfoHandler_h_