Initial import of lldb

Change-Id: Ib244e837bee349effa12b2ff6ffffbe3d730e929

external/bsd/llvm/dist/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp

@@ -0,0 +1,112 @@
+//===-- 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);
+    
+    // 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);
+        }
+    }
+    StreamString s;
+    s.Printf ("for %s:%d ",
+                        m_file_spec.GetFilename().AsCString("<Unknown>"),
+                        m_line_number);
+
+    SetSCMatchesByLine (filter, sc_list, m_skip_prologue, s.GetData());
+
+    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
+{
+
+}
+