[NativePDB] Reconstruct function declarations from debug info.

Previously we would create an lldb::Function object for each function
parsed, but we would not add these to the clang AST. This is a first
step towards getting local variable support working, as we first need an
AST decl so that when we create local variable entries, they have the
proper DeclContext.

Differential Revision: https://reviews.llvm.org/D55384

llvm-svn: 348631

5 files changed, 45 insertions, 1 deletions

diff --git a/lldb/lit/SymbolFile/NativePDB/Inputs/ast-functions.lldbinit b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-functions.lldbinit
new file mode 100644
index 00000000000..c25d96c531d
--- /dev/null
+++ b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-functions.lldbinit
@@ -0,0 +1,8 @@
+
+break set -n main
+break set -n static_fn
+break set -n varargs_fn
+
+target modules dump ast
+
+quit
diff --git a/lldb/lit/SymbolFile/NativePDB/Inputs/ast-reconstruction.lldbinit b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-types.lldbinit
index 3c0cf6d3cdf..3c0cf6d3cdf 100644
--- a/lldb/lit/SymbolFile/NativePDB/Inputs/ast-reconstruction.lldbinit
+++ b/lldb/lit/SymbolFile/NativePDB/Inputs/ast-types.lldbinit
diff --git a/lldb/lit/SymbolFile/NativePDB/ast-functions-msvc.cpp b/lldb/lit/SymbolFile/NativePDB/ast-functions-msvc.cpp
new file mode 100644
index 00000000000..b8154168aff
--- /dev/null
+++ b/lldb/lit/SymbolFile/NativePDB/ast-functions-msvc.cpp
@@ -0,0 +1,7 @@
+// clang-format off
+// REQUIRES: msvc
+
+// RUN: %build --compiler=msvc --nodefaultlib -o %t.exe -- %S/ast-functions.cpp
+
+// RUN: env LLDB_USE_NATIVE_PDB_READER=1 %lldb -f %t.exe -s \
+// RUN:     %p/Inputs/ast-functions.lldbinit 2>&1 | FileCheck %S/ast-functions.cpp
diff --git a/lldb/lit/SymbolFile/NativePDB/ast-functions.cpp b/lldb/lit/SymbolFile/NativePDB/ast-functions.cpp
new file mode 100644
index 00000000000..05c80c7298f
--- /dev/null
+++ b/lldb/lit/SymbolFile/NativePDB/ast-functions.cpp
@@ -0,0 +1,29 @@
+// 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-functions.lldbinit 2>&1 | FileCheck %s
+
+static int static_fn() {
+  return 42;
+}
+
+int varargs_fn(int x, int y, ...) {
+  return x + y;
+}
+
+int main(int argc, char **argv) {
+  return static_fn() + varargs_fn(argc, argc);
+}
+
+// CHECK:      TranslationUnitDecl
+// CHECK-NEXT: |-FunctionDecl {{.*}} main 'int (int, char **)'
+// CHECK-NEXT: | |-ParmVarDecl {{.*}} argc 'int'
+// CHECK-NEXT: | `-ParmVarDecl {{.*}} argv 'char **'
+// CHECK-NEXT: |-FunctionDecl {{.*}} static_fn 'int ()' static
+// CHECK-NEXT: |-FunctionDecl {{.*}} varargs_fn 'int (int, int, ...)'
+// CHECK-NEXT: | |-ParmVarDecl {{.*}} x 'int'
+// CHECK-NEXT: | `-ParmVarDecl {{.*}} y 'int'
+// CHECK-NEXT: `-<undeserialized declarations>
diff --git a/lldb/lit/SymbolFile/NativePDB/ast-reconstruction.cpp b/lldb/lit/SymbolFile/NativePDB/ast-types.cpp
index dae6e6195fa..224c7c26e84 100644
--- a/lldb/lit/SymbolFile/NativePDB/ast-reconstruction.cpp
+++ b/lldb/lit/SymbolFile/NativePDB/ast-types.cpp
@@ -4,7 +4,7 @@
 // Test various interesting cases for AST reconstruction.
 // 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-reconstruction.lldbinit 2>&1 | FileCheck %s
+// RUN:     %p/Inputs/ast-types.lldbinit 2>&1 | FileCheck %s
 
 // Test trivial versions of each tag type.
 class TrivialC {};