summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp
diff options
context:
space:
mode:
authoremaste <emaste@FreeBSD.org>2013-08-23 18:06:42 +0000
committeremaste <emaste@FreeBSD.org>2013-08-23 18:06:42 +0000
commit424d4dadd208e2a1e9a43c3d55f47f03ba0c4509 (patch)
tree05d762b98a499804ce690e6ce04033f1ddf4dee6 /contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp
parentcde487f27a84e02a560384f75178fddca68740f6 (diff)
parentdcd15f81789e389c1cb27d264fcdddfd0a6002bd (diff)
downloadFreeBSD-src-424d4dadd208e2a1e9a43c3d55f47f03ba0c4509.zip
FreeBSD-src-424d4dadd208e2a1e9a43c3d55f47f03ba0c4509.tar.gz
Merge lldb r188801 to contrib/llvm/tools/lldb/
Diffstat (limited to 'contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp')
-rw-r--r--contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp246
1 files changed, 246 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp b/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp
new file mode 100644
index 0000000..91a218f
--- /dev/null
+++ b/contrib/llvm/tools/lldb/source/Breakpoint/BreakpointResolverFileLine.cpp
@@ -0,0 +1,246 @@
+//===-- 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;
+ 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:
+
+ 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
+{
+
+}
+
OpenPOWER on IntegriCloud