From 8106d8082c406b4c381cd0d9604835fc35b45990 Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Fri, 8 Mar 2013 20:04:57 +0000
Subject: Added very lightweight, statically-allocated counters for a variety
 of metrics associated with expression parsing.  This should give some idea of
 how much work the expression parser is doing on Clang's behalf, and help with
 hopefully reducing that load over time.

<rdar://problem/13210748> Audit type search/import for expressions

llvm-svn: 176714
---
 lldb/source/Expression/ClangASTSource.cpp         | 12 ++++++++++--
 lldb/source/Expression/ClangExpressionDeclMap.cpp | 11 ++++++++++-
 2 files changed, 20 insertions(+), 3 deletions(-)

(limited to 'lldb/source/Expression')

diff --git a/lldb/source/Expression/ClangASTSource.cpp b/lldb/source/Expression/ClangASTSource.cpp
index 266dce84464..c394a8cb6f0 100644
--- a/lldb/source/Expression/ClangASTSource.cpp
+++ b/lldb/source/Expression/ClangASTSource.cpp
@@ -367,7 +367,9 @@ clang::ExternalLoadResult
 ClangASTSource::FindExternalLexicalDecls (const DeclContext *decl_context,
                                           bool (*predicate)(Decl::Kind),
                                           llvm::SmallVectorImpl<Decl*> &decls)
-{    
+{
+    ClangASTMetrics::RegisterLexicalQuery();
+
     lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
     
     const Decl *context_decl = dyn_cast<Decl>(decl_context);
@@ -485,6 +487,8 @@ ClangASTSource::FindExternalVisibleDecls (NameSearchContext &context)
 {
     assert (m_ast_context);
     
+    ClangASTMetrics::RegisterVisibleQuery();
+    
     const ConstString name(context.m_decl_name.getAsString().c_str());
     
     lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
@@ -1435,6 +1439,8 @@ ClangASTSource::layoutRecordType(const RecordDecl *record,
                                  BaseOffsetMap &base_offsets,
                                  BaseOffsetMap &virtual_base_offsets)
 {
+    ClangASTMetrics::RegisterRecordLayout();
+    
     static unsigned int invocation_id = 0;
     unsigned int current_id = invocation_id++;
     
@@ -1677,7 +1683,9 @@ void *
 ClangASTSource::GuardedCopyType (ASTContext *dest_context, 
                                  ASTContext *source_context,
                                  void *clang_type)
-{    
+{
+    ClangASTMetrics::RegisterLLDBImport();
+    
     SetImportInProgress(true);
     
     QualType ret_qual_type = m_ast_importer->CopyType (m_ast_context, source_context, QualType::getFromOpaquePtr(clang_type));
diff --git a/lldb/source/Expression/ClangExpressionDeclMap.cpp b/lldb/source/Expression/ClangExpressionDeclMap.cpp
index 1b621224be6..078825797dc 100644
--- a/lldb/source/Expression/ClangExpressionDeclMap.cpp
+++ b/lldb/source/Expression/ClangExpressionDeclMap.cpp
@@ -75,7 +75,9 @@ ClangExpressionDeclMap::~ClangExpressionDeclMap()
 
 bool 
 ClangExpressionDeclMap::WillParse(ExecutionContext &exe_ctx)
-{    
+{
+    ClangASTMetrics::ClearLocalCounters();
+    
     EnableParserVars();
     m_parser_vars->m_exe_ctx = exe_ctx;
     
@@ -111,6 +113,11 @@ ClangExpressionDeclMap::WillParse(ExecutionContext &exe_ctx)
 void 
 ClangExpressionDeclMap::DidParse()
 {
+    lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
+
+    if (log)
+        ClangASTMetrics::DumpCounters(log);
+    
     if (m_parser_vars.get())
     {
         for (size_t entity_index = 0, num_entities = m_found_entities.GetSize();
@@ -2605,6 +2612,8 @@ ClangExpressionDeclMap::FindExternalVisibleDecls (NameSearchContext &context)
 {
     assert (m_ast_context);
     
+    ClangASTMetrics::RegisterVisibleQuery();
+    
     const ConstString name(context.m_decl_name.getAsString().c_str());
     
     lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
-- 
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