97206d5727
This renames the LLDB error class to Status, as discussed on the lldb-dev mailing list. A change of this magnitude cannot easily be done without find and replace, but that has potential to catch unwanted occurrences of common strings such as "Error". Every effort was made to find all the obvious things such as the word "Error" appearing in a string, etc, but it's possible there are still some lingering occurences left around. Hopefully nothing too serious. llvm-svn: 302872
120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
//===-- AppleGetItemInfoHandler.h ----------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef lldb_AppleGetItemInfoHandler_h_
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#define lldb_AppleGetItemInfoHandler_h_
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// C Includes
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// C++ Includes
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#include <map>
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#include <mutex>
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#include <vector>
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Expression/UtilityFunction.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/lldb-public.h"
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// This class will insert a UtilityFunction into the inferior process for
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// calling libBacktraceRecording's
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// __introspection_dispatch_queue_item_get_info()
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// function. The function in the inferior will return a struct by value
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// with these members:
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//
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// struct get_item_info_return_values
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// {
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// introspection_dispatch_item_info_ref *item_buffer;
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// uint64_t item_buffer_size;
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// };
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//
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// The item_buffer pointer is an address in the inferior program's address
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// space (item_buffer_size in size) which must be mach_vm_deallocate'd by
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// lldb.
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//
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// The AppleGetItemInfoHandler object should persist so that the UtilityFunction
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// can be reused multiple times.
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namespace lldb_private {
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class AppleGetItemInfoHandler {
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public:
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AppleGetItemInfoHandler(lldb_private::Process *process);
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~AppleGetItemInfoHandler();
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struct GetItemInfoReturnInfo {
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lldb::addr_t item_buffer_ptr; /* the address of the item buffer from
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libBacktraceRecording */
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lldb::addr_t item_buffer_size; /* the size of the item buffer from
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libBacktraceRecording */
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GetItemInfoReturnInfo()
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: item_buffer_ptr(LLDB_INVALID_ADDRESS), item_buffer_size(0) {}
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};
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//----------------------------------------------------------
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/// Get the information about a work item by calling
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/// __introspection_dispatch_queue_item_get_info. If there's a page of
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/// memory that needs to be freed, pass in the address and size and it will
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/// be freed before getting the list of queues.
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///
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/// @param [in] thread
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/// The thread to run this plan on.
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///
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/// @param [in] item
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/// The introspection_dispatch_item_info_ref value for the item of
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/// interest.
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///
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/// @param [in] page_to_free
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/// An address of an inferior process vm page that needs to be
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/// deallocated,
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/// LLDB_INVALID_ADDRESS if this is not needed.
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///
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/// @param [in] page_to_free_size
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/// The size of the vm page that needs to be deallocated if an address was
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/// passed in to page_to_free.
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///
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/// @param [out] error
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/// This object will be updated with the error status / error string from
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/// any failures encountered.
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///
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/// @returns
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/// The result of the inferior function call execution. If there was a
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/// failure of any kind while getting
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/// the information, the item_buffer_ptr value will be
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/// LLDB_INVALID_ADDRESS.
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//----------------------------------------------------------
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GetItemInfoReturnInfo GetItemInfo(Thread &thread, lldb::addr_t item,
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lldb::addr_t page_to_free,
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uint64_t page_to_free_size,
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lldb_private::Status &error);
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void Detach();
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private:
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lldb::addr_t SetupGetItemInfoFunction(Thread &thread,
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ValueList &get_item_info_arglist);
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static const char *g_get_item_info_function_name;
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static const char *g_get_item_info_function_code;
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lldb_private::Process *m_process;
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std::unique_ptr<UtilityFunction> m_get_item_info_impl_code;
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std::mutex m_get_item_info_function_mutex;
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lldb::addr_t m_get_item_info_return_buffer_addr;
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std::mutex m_get_item_info_retbuffer_mutex;
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};
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} // using namespace lldb_private
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#endif // lldb_AppleGetItemInfoHandler_h_
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