1460e4bf0e
symbols correctly. There were a couple of pieces to this. 1) When a breakpoint location finds itself pointing to an Indirect symbol, when the site for it is created it needs to resolve the symbol and actually set the site at its target. 2) Not all breakpoints want to do this (i.e. a straight address breakpoint should always set itself on the specified address, so somem machinery was needed to specify that. 3) I added some info to the break list output for indirect symbols so you could see what was happening. Also I made it clear when we re-route through re-exported symbols. 4) I moved ResolveIndirectFunction from ProcessPosix to Process since it works the exact same way on Mac OS X and the other posix systems. If we find a platform that doesn't do it this way, they can override the call in Process. 5) Fixed one bug in RunThreadPlan, if you were trying to run a thread plan after a "running" event had been broadcast, the event coalescing would cause you to miss the ThreadPlan running event. So I added a way to override the coalescing. 6) Made DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan handle Indirect & Re-exported symbols. <rdar://problem/15280639> llvm-svn: 198976
288 lines
12 KiB
C++
288 lines
12 KiB
C++
//===-- InferiorCallPOSIX.cpp -----------------------------------*- 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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#include "InferiorCallPOSIX.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/StreamFile.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/ThreadPlanCallFunction.h"
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#include "lldb/Host/Config.h"
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#ifndef LLDB_DISABLE_POSIX
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#include <sys/mman.h>
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#else
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// define them
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define MAP_PRIVATE 2
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#define MAP_ANON 0x1000
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#endif
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using namespace lldb;
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using namespace lldb_private;
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bool
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lldb_private::InferiorCallMmap (Process *process,
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addr_t &allocated_addr,
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addr_t addr,
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addr_t length,
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unsigned prot,
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unsigned flags,
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addr_t fd,
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addr_t offset)
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{
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Thread *thread = process->GetThreadList().GetSelectedThread().get();
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if (thread == NULL)
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return false;
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const bool append = true;
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const bool include_symbols = true;
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const bool include_inlines = false;
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SymbolContextList sc_list;
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const uint32_t count
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= process->GetTarget().GetImages().FindFunctions (ConstString ("mmap"),
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eFunctionNameTypeFull,
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include_symbols,
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include_inlines,
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append,
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sc_list);
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if (count > 0)
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{
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc))
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{
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const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug (false);
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options.SetTimeoutUsec(500000);
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addr_t prot_arg, flags_arg = 0;
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if (prot == eMmapProtNone)
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prot_arg = PROT_NONE;
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else {
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prot_arg = 0;
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if (prot & eMmapProtExec)
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prot_arg |= PROT_EXEC;
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if (prot & eMmapProtRead)
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prot_arg |= PROT_READ;
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if (prot & eMmapProtWrite)
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prot_arg |= PROT_WRITE;
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}
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if (flags & eMmapFlagsPrivate)
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flags_arg |= MAP_PRIVATE;
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if (flags & eMmapFlagsAnon)
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flags_arg |= MAP_ANON;
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AddressRange mmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, mmap_range))
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{
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ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
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ClangASTType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
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lldb::addr_t args[] = { addr, length, prot_arg, flags_arg, fd, offset };
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ThreadPlanCallFunction *call_function_thread_plan
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= new ThreadPlanCallFunction (*thread,
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mmap_range.GetBaseAddress(),
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clang_void_ptr_type,
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args,
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options);
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lldb::ThreadPlanSP call_plan_sp (call_function_thread_plan);
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if (call_plan_sp)
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{
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StreamFile error_strm;
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// This plan is a utility plan, so set it to discard itself when done.
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call_plan_sp->SetIsMasterPlan (true);
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call_plan_sp->SetOkayToDiscard(true);
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StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
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if (frame)
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{
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext (exe_ctx);
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ExecutionResults result = process->RunThreadPlan (exe_ctx,
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call_plan_sp,
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options,
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error_strm);
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if (result == eExecutionCompleted)
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{
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allocated_addr = call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
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if (process->GetAddressByteSize() == 4)
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{
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if (allocated_addr == UINT32_MAX)
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return false;
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}
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else if (process->GetAddressByteSize() == 8)
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{
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if (allocated_addr == UINT64_MAX)
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return false;
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}
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return true;
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}
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}
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}
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}
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}
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}
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return false;
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}
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bool
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lldb_private::InferiorCallMunmap (Process *process,
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addr_t addr,
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addr_t length)
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{
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Thread *thread = process->GetThreadList().GetSelectedThread().get();
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if (thread == NULL)
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return false;
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const bool append = true;
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const bool include_symbols = true;
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const bool include_inlines = false;
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SymbolContextList sc_list;
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const uint32_t count
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= process->GetTarget().GetImages().FindFunctions (ConstString ("munmap"),
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eFunctionNameTypeFull,
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include_symbols,
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include_inlines,
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append,
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sc_list);
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if (count > 0)
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{
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc))
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{
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const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug (false);
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options.SetTimeoutUsec(500000);
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AddressRange munmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, munmap_range))
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{
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lldb::addr_t args[] = { addr, length };
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lldb::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
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munmap_range.GetBaseAddress(),
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ClangASTType(),
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args,
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options));
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if (call_plan_sp)
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{
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StreamFile error_strm;
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// This plan is a utility plan, so set it to discard itself when done.
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call_plan_sp->SetIsMasterPlan (true);
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call_plan_sp->SetOkayToDiscard(true);
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StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
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if (frame)
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{
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext (exe_ctx);
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ExecutionResults result = process->RunThreadPlan (exe_ctx,
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call_plan_sp,
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options,
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error_strm);
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if (result == eExecutionCompleted)
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{
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return true;
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}
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}
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}
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}
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}
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}
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return false;
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}
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// FIXME: This has nothing to do with Posix, it is just a convenience function that calls a
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// function of the form "void * (*)(void)". We should find a better place to put this.
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bool
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lldb_private::InferiorCall (Process *process,
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const Address *address,
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addr_t &returned_func)
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{
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Thread *thread = process->GetThreadList().GetSelectedThread().get();
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if (thread == NULL || address == NULL)
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return false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug (false);
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options.SetTimeoutUsec(500000);
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ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
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ClangASTType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
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ThreadPlanCallFunction *call_function_thread_plan
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= new ThreadPlanCallFunction (*thread,
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*address,
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clang_void_ptr_type,
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llvm::ArrayRef<addr_t>(),
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options);
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lldb::ThreadPlanSP call_plan_sp (call_function_thread_plan);
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if (call_plan_sp)
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{
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StreamString error_strm;
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// This plan is a utility plan, so set it to discard itself when done.
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call_plan_sp->SetIsMasterPlan (true);
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call_plan_sp->SetOkayToDiscard(true);
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StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
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if (frame)
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{
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext (exe_ctx);
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ExecutionResults result = process->RunThreadPlan (exe_ctx,
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call_plan_sp,
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options,
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error_strm);
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if (result == eExecutionCompleted)
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{
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returned_func = call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
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if (process->GetAddressByteSize() == 4)
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{
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if (returned_func == UINT32_MAX)
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return false;
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}
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else if (process->GetAddressByteSize() == 8)
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{
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if (returned_func == UINT64_MAX)
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return false;
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}
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return true;
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}
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}
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}
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return false;
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}
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