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