[NativePDB] Add basic support of methods recostruction in AST

Summary:
This patch adds the basic support of methods reconstruction by native PDB
plugin. It contains only most obvious changes (it processes LF_ONEMETHOD and
LF_METHOD records), some things still remain unsolved:

- mangled names retrieving;
- support of template methods.

Reviewers: zturner, labath, lemo, stella.stamenova

Reviewed by: zturner

Differential Revision: https://reviews.llvm.org/D56126

llvm-svn: 352464

2 files changed, 41 insertions, 0 deletions

diff --git a/lldb/lit/SymbolFile/NativePDB/Inputs/ast-methods.lldbinit b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-methods.lldbinit
new file mode 100644
index 00000000000..6d593589c4a
--- /dev/null
+++ b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-methods.lldbinit
@@ -0,0 +1,5 @@
+target variable s
+
+target modules dump ast
+
+quit
diff --git a/lldb/lit/SymbolFile/NativePDB/ast-methods.cpp b/lldb/lit/SymbolFile/NativePDB/ast-methods.cpp
new file mode 100644
index 00000000000..6006c722cfb
--- /dev/null
+++ b/lldb/lit/SymbolFile/NativePDB/ast-methods.cpp
@@ -0,0 +1,36 @@
+// clang-format off
+// REQUIRES: lld
+
+// RUN: %build --compiler=clang-cl --nodefaultlib -o %t.exe -- %s
+// RUN: env LLDB_USE_NATIVE_PDB_READER=1 %lldb -f %t.exe -s \
+// RUN:     %p/Inputs/ast-methods.lldbinit 2>&1 | FileCheck %s
+
+struct Struct {
+  void simple_method() {}
+
+  virtual void virtual_method() {}
+
+  static void static_method() {}
+
+  int overloaded_method() {}
+  int overloaded_method(char c) {}
+  int overloaded_method(char c, int i, ...) {}
+};
+
+Struct s;
+
+int main(int argc, char **argv) {
+  return 0;
+}
+
+// CHECK: TranslationUnitDecl
+// CHECK: |-CXXRecordDecl {{.*}} struct Struct definition
+// CHECK: | |-CXXMethodDecl {{.*}} simple_method 'void (){{.*}}'
+// CHECK: | |-CXXMethodDecl {{.*}} virtual_method 'void (){{.*}}' virtual
+// CHECK: | |-CXXMethodDecl {{.*}} static_method 'void ()' static
+// CHECK: | |-CXXMethodDecl {{.*}} overloaded_method 'int (){{.*}}'
+// CHECK: | |-CXXMethodDecl {{.*}} overloaded_method 'int (char){{.*}}'
+// CHECK: | | `-ParmVarDecl {{.*}} 'char'
+// CHECK: | `-CXXMethodDecl {{.*}} overloaded_method 'int (char, int, ...)'
+// CHECK: |   |-ParmVarDecl {{.*}} 'char'
+// CHECK: |   `-ParmVarDecl {{.*}} 'int'