| //===-- BreakpointResolverFileLine.cpp --------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Breakpoint/BreakpointResolverFileLine.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Breakpoint/BreakpointLocation.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Symbol/CompileUnit.h" |
| #include "lldb/Symbol/Function.h" |
| #include "lldb/lldb-private-log.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // BreakpointResolverFileLine: |
| //---------------------------------------------------------------------- |
| BreakpointResolverFileLine::BreakpointResolverFileLine |
| ( |
| Breakpoint *bkpt, |
| const FileSpec &file_spec, |
| uint32_t line_no, |
| bool check_inlines, |
| bool skip_prologue |
| ) : |
| BreakpointResolver (bkpt, BreakpointResolver::FileLineResolver), |
| m_file_spec (file_spec), |
| m_line_number (line_no), |
| m_inlines (check_inlines), |
| m_skip_prologue(skip_prologue) |
| { |
| } |
| |
| BreakpointResolverFileLine::~BreakpointResolverFileLine () |
| { |
| } |
| |
| Searcher::CallbackReturn |
| BreakpointResolverFileLine::SearchCallback |
| ( |
| SearchFilter &filter, |
| SymbolContext &context, |
| Address *addr, |
| bool containing |
| ) |
| { |
| SymbolContextList sc_list; |
| |
| assert (m_breakpoint != NULL); |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); |
| |
| // There is a tricky bit here. You can have two compilation units that #include the same file, and |
| // in one of them the function at m_line_number is used (and so code and a line entry for it is generated) but in the |
| // other it isn't. If we considered the CU's independently, then in the second inclusion, we'd move the breakpoint |
| // to the next function that actually generated code in the header file. That would end up being confusing. |
| // So instead, we do the CU iterations by hand here, then scan through the complete list of matches, and figure out |
| // the closest line number match, and only set breakpoints on that match. |
| |
| // Note also that if file_spec only had a file name and not a directory, there may be many different file spec's in |
| // the resultant list. The closest line match for one will not be right for some totally different file. |
| // So we go through the match list and pull out the sets that have the same file spec in their line_entry |
| // and treat each set separately. |
| |
| const size_t num_comp_units = context.module_sp->GetNumCompileUnits(); |
| for (size_t i = 0; i < num_comp_units; i++) |
| { |
| CompUnitSP cu_sp (context.module_sp->GetCompileUnitAtIndex (i)); |
| if (cu_sp) |
| { |
| if (filter.CompUnitPasses(*cu_sp)) |
| cu_sp->ResolveSymbolContext (m_file_spec, m_line_number, m_inlines, false, eSymbolContextEverything, sc_list); |
| } |
| } |
| |
| while (sc_list.GetSize() > 0) |
| { |
| SymbolContextList tmp_sc_list; |
| int current_idx = 0; |
| SymbolContext sc; |
| bool first_entry = true; |
| |
| FileSpec match_file_spec; |
| uint32_t closest_line_number = UINT32_MAX; |
| |
| // Pull out the first entry, and all the others that match its file spec, and stuff them in the tmp list. |
| while (current_idx < sc_list.GetSize()) |
| { |
| bool matches; |
| |
| sc_list.GetContextAtIndex (current_idx, sc); |
| if (first_entry) |
| { |
| match_file_spec = sc.line_entry.file; |
| matches = true; |
| first_entry = false; |
| } |
| else |
| matches = (sc.line_entry.file == match_file_spec); |
| |
| if (matches) |
| { |
| tmp_sc_list.Append (sc); |
| sc_list.RemoveContextAtIndex(current_idx); |
| |
| // ResolveSymbolContext will always return a number that is >= the line number you pass in. |
| // So the smaller line number is always better. |
| if (sc.line_entry.line < closest_line_number) |
| closest_line_number = sc.line_entry.line; |
| } |
| else |
| current_idx++; |
| } |
| |
| // Okay, we've found the closest line number match, now throw away all the others: |
| |
| current_idx = 0; |
| while (current_idx < tmp_sc_list.GetSize()) |
| { |
| if (tmp_sc_list.GetContextAtIndex(current_idx, sc)) |
| { |
| if (sc.line_entry.line != closest_line_number) |
| tmp_sc_list.RemoveContextAtIndex(current_idx); |
| else |
| current_idx++; |
| } |
| } |
| |
| // Next go through and see if there are line table entries that are contiguous, and if so keep only the |
| // first of the contiguous range: |
| |
| lldb::addr_t last_end_addr = LLDB_INVALID_ADDRESS; |
| current_idx = 0; |
| while (current_idx < tmp_sc_list.GetSize()) |
| { |
| if (tmp_sc_list.GetContextAtIndex(current_idx, sc)) |
| { |
| lldb::addr_t start_file_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress(); |
| lldb::addr_t end_file_addr = start_file_addr + sc.line_entry.range.GetByteSize(); |
| |
| if (start_file_addr == last_end_addr) |
| tmp_sc_list.RemoveContextAtIndex(current_idx); |
| else |
| current_idx++; |
| |
| last_end_addr = end_file_addr; |
| } |
| } |
| |
| // and make breakpoints out of the closest line number match. |
| |
| uint32_t tmp_sc_list_size = tmp_sc_list.GetSize(); |
| |
| for (uint32_t i = 0; i < tmp_sc_list_size; i++) |
| { |
| if (tmp_sc_list.GetContextAtIndex(i, sc)) |
| { |
| Address line_start = sc.line_entry.range.GetBaseAddress(); |
| if (line_start.IsValid()) |
| { |
| if (filter.AddressPasses(line_start)) |
| { |
| // If the line number is before the prologue end, move it there... |
| bool skipped_prologue = false; |
| if (m_skip_prologue) |
| { |
| if (sc.function) |
| { |
| Address prologue_addr(sc.function->GetAddressRange().GetBaseAddress()); |
| if (prologue_addr.IsValid() && (line_start == prologue_addr)) |
| { |
| const uint32_t prologue_byte_size = sc.function->GetPrologueByteSize(); |
| if (prologue_byte_size) |
| { |
| prologue_addr.Slide(prologue_byte_size); |
| |
| if (filter.AddressPasses(prologue_addr)) |
| { |
| skipped_prologue = true; |
| line_start = prologue_addr; |
| } |
| } |
| } |
| } |
| } |
| |
| BreakpointLocationSP bp_loc_sp (m_breakpoint->AddLocation(line_start)); |
| if (log && bp_loc_sp && !m_breakpoint->IsInternal()) |
| { |
| StreamString s; |
| bp_loc_sp->GetDescription (&s, lldb::eDescriptionLevelVerbose); |
| log->Printf ("Added location (skipped prologue: %s): %s \n", skipped_prologue ? "yes" : "no", s.GetData()); |
| } |
| } |
| else if (log) |
| { |
| log->Printf ("Breakpoint at file address 0x%" PRIx64 " for %s:%d didn't pass the filter.\n", |
| line_start.GetFileAddress(), |
| m_file_spec.GetFilename().AsCString("<Unknown>"), |
| m_line_number); |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("error: Unable to set breakpoint at file address 0x%" PRIx64 " for %s:%d\n", |
| line_start.GetFileAddress(), |
| m_file_spec.GetFilename().AsCString("<Unknown>"), |
| m_line_number); |
| } |
| } |
| } |
| } |
| |
| return Searcher::eCallbackReturnContinue; |
| } |
| |
| Searcher::Depth |
| BreakpointResolverFileLine::GetDepth() |
| { |
| return Searcher::eDepthModule; |
| } |
| |
| void |
| BreakpointResolverFileLine::GetDescription (Stream *s) |
| { |
| s->Printf ("file = '%s', line = %u", m_file_spec.GetPath().c_str(), m_line_number); |
| } |
| |
| void |
| BreakpointResolverFileLine::Dump (Stream *s) const |
| { |
| |
| } |
| |