diff options
Diffstat (limited to 'contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp')
| -rw-r--r-- | contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp b/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp index b22fa1e..33b0ff4 100644 --- a/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp +++ b/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolver.cpp @@ -23,9 +23,12 @@ #include "lldb/Core/StreamString.h" #include "lldb/Symbol/SymbolContext.h" #include "lldb/Target/Target.h" +#include "lldb/Symbol/CompileUnit.h" +#include "lldb/Symbol/Function.h" #include "lldb/lldb-private-log.h" using namespace lldb_private; +using namespace lldb; //---------------------------------------------------------------------- // BreakpointResolver: @@ -59,3 +62,144 @@ BreakpointResolver::ResolveBreakpoint (SearchFilter &filter) filter.Search (*this); } +void +BreakpointResolver::SetSCMatchesByLine (SearchFilter &filter, SymbolContextList &sc_list, bool skip_prologue, const char *log_ident) +{ + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS)); + + while (sc_list.GetSize() > 0) + { + SymbolContextList tmp_sc_list; + unsigned 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: + + current_idx = 0; + std::map<Block *, lldb::addr_t> blocks_with_breakpoints; + + while (current_idx < tmp_sc_list.GetSize()) + { + if (tmp_sc_list.GetContextAtIndex(current_idx, sc)) + { + if (blocks_with_breakpoints.find (sc.block) != blocks_with_breakpoints.end()) + tmp_sc_list.RemoveContextAtIndex(current_idx); + else + { + blocks_with_breakpoints.insert (std::pair<Block *, lldb::addr_t>(sc.block, sc.line_entry.range.GetBaseAddress().GetFileAddress())); + current_idx++; + } + } + } + + // 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 (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 %s at file address 0x%" PRIx64 " didn't pass the filter.\n", + log_ident ? log_ident : "", + line_start.GetFileAddress()); + } + } + else + { + if (log) + log->Printf ("error: Unable to set breakpoint %s at file address 0x%" PRIx64 "\n", + log_ident ? log_ident : "", + line_start.GetFileAddress()); + } + } + } + } +} |
