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Simplify FuncUnwinders::GetEHFrameAugmentedUnwindPlan 

Summary:
GetEHFrameAugmentedUnwindPlan duplicated the work of GetEHFrameUnwindPlan in getting the original
plan from DWARF CFI. This changes the function to call GetEHFrameUnwindPlan instead of doing all
the work itself. A copy constructor is added to UnwindPlan to enable plan copying.

Test Plan: No regressions on linux test suite.

Reviewers: jasonmolenda, clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D9369

llvm-svn: 236607
This commit is contained in:
Pavel Labath 2015-05-06 15:54:48 +00:00
parent 5fe2e25f7c
commit ad5ee04058
2 changed files with 34 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
lldb/include/lldb/Symbol/UnwindPlan.h
View File

@ -504,6 +504,22 @@ public:
{
}
// Performs a deep copy of the plan, including all the rows (expensive).
UnwindPlan (const UnwindPlan &rhs) :
m_plan_valid_address_range (rhs.m_plan_valid_address_range),
m_register_kind (rhs.m_register_kind),
m_return_addr_register (rhs.m_return_addr_register),
m_source_name (rhs.m_source_name),
m_plan_is_sourced_from_compiler (rhs.m_plan_is_sourced_from_compiler),
m_plan_is_valid_at_all_instruction_locations (rhs.m_plan_is_valid_at_all_instruction_locations),
m_lsda_address (rhs.m_lsda_address),
m_personality_func_addr (rhs.m_personality_func_addr)
{
m_row_list.reserve (rhs.m_row_list.size());
for (const RowSP &row_sp: rhs.m_row_list)
m_row_list.emplace_back (new Row (*row_sp));
}
~UnwindPlan ()
{
}

48
lldb/source/Symbol/FuncUnwinders.cpp
View File

@ -145,39 +145,27 @@ FuncUnwinders::GetEHFrameAugmentedUnwindPlan (Target &target, Thread &thread, in
Mutex::Locker lock (m_mutex);
m_tried_unwind_plan_eh_frame_augmented = true;
if (m_range.GetBaseAddress().IsValid())
{
Address current_pc (m_range.GetBaseAddress ());
if (current_offset != -1)
current_pc.SetOffset (current_pc.GetOffset() + current_offset);
DWARFCallFrameInfo *eh_frame = m_unwind_table.GetEHFrameInfo();
if (eh_frame)
{
m_unwind_plan_eh_frame_augmented_sp.reset (new UnwindPlan (lldb::eRegisterKindGeneric));
if (!eh_frame->GetUnwindPlan (current_pc, *m_unwind_plan_eh_frame_augmented_sp))
{
m_unwind_plan_eh_frame_augmented_sp.reset();
}
else
{
// Augment the eh_frame instructions with epilogue descriptions if necessary so the
// UnwindPlan can be used at any instruction in the function.
UnwindPlanSP eh_frame_plan = GetEHFrameUnwindPlan (target, current_offset);
if (!eh_frame_plan)
return m_unwind_plan_eh_frame_augmented_sp;
UnwindAssemblySP assembly_profiler_sp (GetUnwindAssemblyProfiler());
if (assembly_profiler_sp)
{
if (!assembly_profiler_sp->AugmentUnwindPlanFromCallSite (m_range, thread, *m_unwind_plan_eh_frame_augmented_sp))
{
m_unwind_plan_eh_frame_augmented_sp.reset();
}
}
else
{
m_unwind_plan_eh_frame_augmented_sp.reset();
}
}
m_unwind_plan_eh_frame_augmented_sp.reset(new UnwindPlan(*eh_frame_plan));
// Augment the eh_frame instructions with epilogue descriptions if necessary so the
// UnwindPlan can be used at any instruction in the function.
UnwindAssemblySP assembly_profiler_sp (GetUnwindAssemblyProfiler());
if (assembly_profiler_sp)
{
if (!assembly_profiler_sp->AugmentUnwindPlanFromCallSite (m_range, thread, *m_unwind_plan_eh_frame_augmented_sp))
{
m_unwind_plan_eh_frame_augmented_sp.reset();
}
}
else
{
m_unwind_plan_eh_frame_augmented_sp.reset();
}
return m_unwind_plan_eh_frame_augmented_sp;
}