1f7460716b
Make breakpoint setting by file and line much more efficient by only looking for inlined breakpoint locations if we are setting a breakpoint in anything but a source implementation file. Implementing this complex for a many reasons. Turns out that parsing compile units lazily had some issues with respect to how we need to do things with DWARF in .o files. So the fixes in the checkin for this makes these changes: - Add a new setting called "target.inline-breakpoint-strategy" which can be set to "never", "always", or "headers". "never" will never try and set any inlined breakpoints (fastest). "always" always looks for inlined breakpoint locations (slowest, but most accurate). "headers", which is the default setting, will only look for inlined breakpoint locations if the breakpoint is set in what are consudered to be header files, which is realy defined as "not in an implementation source file". - modify the breakpoint setting by file and line to check the current "target.inline-breakpoint-strategy" setting and act accordingly - Modify compile units to be able to get their language and other info lazily. This allows us to create compile units from the debug map and not have to fill all of the details in, and then lazily discover this information as we go on debuggging. This is needed to avoid parsing all .o files when setting breakpoints in implementation only files (no inlines). Otherwise we would need to parse the .o file, the object file (mach-o in our case) and the symbol file (DWARF in the object file) just to see what the compile unit was. - modify the "SymbolFileDWARFDebugMap" to subclass lldb_private::Module so that the virtual "GetObjectFile()" and "GetSymbolVendor()" functions can be intercepted when the .o file contenst are later lazilly needed. Prior to this fix, when we first instantiated the "SymbolFileDWARFDebugMap" class, we would also make modules, object files and symbol files for every .o file in the debug map because we needed to fix up the sections in the .o files with information that is in the executable debug map. Now we lazily do this in the DebugMapModule::GetObjectFile() Cleaned up header includes a bit as well. llvm-svn: 162860
200 lines
9.1 KiB
C++
200 lines
9.1 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/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 <sys/mman.h>
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using namespace lldb;
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using namespace lldb_private;
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bool lldb_private::InferiorCallMmap(Process *process, addr_t &allocated_addr,
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addr_t addr, addr_t length, unsigned prot,
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unsigned flags, addr_t fd, addr_t offset) {
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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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const bool stop_other_threads = true;
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const bool discard_on_error = true;
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const bool try_all_threads = true;
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const uint32_t single_thread_timeout_usec = 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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lldb::clang_type_t clang_void_ptr_type = clang_ast_context->GetVoidPtrType(false);
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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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ClangASTType (clang_ast_context->getASTContext(), clang_void_ptr_type),
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stop_other_threads,
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discard_on_error,
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&addr,
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&length,
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&prot_arg,
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&flags_arg,
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&fd,
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&offset);
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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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stop_other_threads,
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try_all_threads,
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discard_on_error,
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single_thread_timeout_usec,
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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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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 lldb_private::InferiorCallMunmap(Process *process, addr_t addr,
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addr_t length) {
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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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const bool stop_other_threads = true;
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const bool discard_on_error = true;
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const bool try_all_threads = true;
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const uint32_t single_thread_timeout_usec = 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::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
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munmap_range.GetBaseAddress(),
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ClangASTType(),
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stop_other_threads,
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discard_on_error,
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&addr,
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&length));
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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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stop_other_threads,
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try_all_threads,
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discard_on_error,
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single_thread_timeout_usec,
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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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