Index: lldb/lit/SymbolFile/NativePDB/Inputs/globals-bss.lldbinit
===================================================================
--- /dev/null
+++ lldb/lit/SymbolFile/NativePDB/Inputs/globals-bss.lldbinit
@@ -0,0 +1,3 @@
+target variable GlobalVariable
+
+quit
Index: lldb/lit/SymbolFile/NativePDB/ast-reconstruction.cpp
===================================================================
--- lldb/lit/SymbolFile/NativePDB/ast-reconstruction.cpp
+++ lldb/lit/SymbolFile/NativePDB/ast-reconstruction.cpp
@@ -89,22 +89,23 @@
 // CHECK: (TrivialC) TC = {}
 // CHECK: (TrivialS) TS = {}
 // CHECK: (TrivialU) TU = {}
-// CHECK: (TrivialE) TE = <Unable to determine byte size.>
-// CHECK: (A::B::C<int>) ABCInt = (ABCMember = <read memory from {{.*}} failed>)
-// CHECK: (A::B::C<float>) ABCFloat = (ABCMember = <read memory from {{.*}} failed>)
-// CHECK: (A::B::C<void>) ABCVoid = (ABCSpecializationMember = <read memory from {{.*}} failed>)
+// CHECK: (TrivialE) TE = TE_A
+// CHECK: (A::B::C<int>) ABCInt = (ABCMember = 0)
+// CHECK: (A::B::C<float>) ABCFloat = (ABCMember = 0)
+// CHECK: (A::B::C<void>) ABCVoid = (ABCSpecializationMember = 0x0000000000000000)
 // CHECK: (A::C<0>) AC0 = {}
 // CHECK: (A::C<-1>) ACNeg1 = {}
-// CHECK: (A::C<0>::D) AC0D = (ACDMember = <read memory from {{.*}} failed>, CPtr = <read memory from {{.*}} failed>)
-// CHECK: (A::C<-1>::D) ACNeg1D = (ACDMember = <read memory from {{.*}} failed>, CPtr = <read memory from {{.*}} failed>)
+// CHECK: (A::C<0>::D) AC0D = (ACDMember = 0, CPtr = 0x0000000000000000)
+// CHECK: (A::C<-1>::D) ACNeg1D = (ACDMember = 0, CPtr = 0x0000000000000000)
 // CHECK: (A::D) AD = {}
-// CHECK: (A::D::E) ADE = (ADDMember = <read memory from {{.*}} failed>)
+// CHECK: (A::D::E) ADE = (ADDMember = 0)
 // CHECK: Dumping clang ast for 1 modules.
 // CHECK: TranslationUnitDecl {{.*}}
 // CHECK: |-CXXRecordDecl {{.*}} class TrivialC definition
 // CHECK: |-CXXRecordDecl {{.*}} struct TrivialS definition
 // CHECK: |-CXXRecordDecl {{.*}} union TrivialU definition
 // CHECK: |-EnumDecl {{.*}} TrivialE
+// CHECK: | `-EnumConstantDecl {{.*}} TE_A 'int'
 // CHECK: |-NamespaceDecl {{.*}} A
 // CHECK: | |-NamespaceDecl {{.*}} B
 // CHECK: | | |-CXXRecordDecl {{.*}} struct C<int> definition
Index: lldb/lit/SymbolFile/NativePDB/globals-bss.cpp
===================================================================
--- /dev/null
+++ lldb/lit/SymbolFile/NativePDB/globals-bss.cpp
@@ -0,0 +1,35 @@
+// clang-format off
+// REQUIRES: lld
+
+// Make sure we can read variables from BSS
+// RUN: clang-cl /Z7 /GS- /GR- /c /Fo%t.obj -- %s
+// RUN: lld-link /DEBUG /nodefaultlib /entry:main /OUT:%t.exe /PDB:%t.pdb -- %t.obj
+// RUN: llvm-readobj -s %t.exe | FileCheck --check-prefix=BSS %s
+// RUN: env LLDB_USE_NATIVE_PDB_READER=1 lldb -f %t.exe -s \
+// RUN:     %p/Inputs/globals-bss.lldbinit 2>&1 | FileCheck %s
+
+int GlobalVariable = 0;
+
+int main(int argc, char **argv) {
+  return 0;
+}
+
+// BSS:       Section {
+// BSS-NEXT:    Number: 3
+// BSS-NEXT:    Name: .data
+// BSS-NEXT:    VirtualSize: 0x4
+// BSS-NEXT:    VirtualAddress:
+// BSS-NEXT:    RawDataSize: 0
+// BSS-NEXT:    PointerToRawData: 0x0
+// BSS-NEXT:    PointerToRelocations: 0x0
+// BSS-NEXT:    PointerToLineNumbers: 0x0
+// BSS-NEXT:    RelocationCount: 0
+// BSS-NEXT:    LineNumberCount: 0
+// BSS-NEXT:    Characteristics [ (0xC0000040)
+// BSS-NEXT:      IMAGE_SCN_CNT_INITIALIZED_DATA (0x40)
+// BSS-NEXT:      IMAGE_SCN_MEM_READ (0x40000000)
+// BSS-NEXT:      IMAGE_SCN_MEM_WRITE (0x80000000)
+// BSS-NEXT:    ]
+// BSS-NEXT:  }
+
+// CHECK: (int) GlobalVariable = 0
Index: lldb/source/Core/ValueObjectVariable.cpp
===================================================================
--- lldb/source/Core/ValueObjectVariable.cpp
+++ lldb/source/Core/ValueObjectVariable.cpp
@@ -67,7 +67,7 @@
 CompilerType ValueObjectVariable::GetCompilerTypeImpl() {
   Type *var_type = m_variable_sp->GetType();
   if (var_type)
-    return var_type->GetForwardCompilerType();
+    return var_type->GetFullCompilerType();
   return CompilerType();
 }
 
Index: lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
===================================================================
--- lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
+++ lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
@@ -125,6 +125,10 @@
 
   ObjectFile::Strata CalculateStrata() override;
 
+  size_t ReadSectionData(lldb_private::Section *section,
+                         lldb::offset_t section_offset, void *dst,
+                         size_t dst_len) override;
+
   //------------------------------------------------------------------
   // PluginInterface protocol
   //------------------------------------------------------------------
Index: lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
===================================================================
--- lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
+++ lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
@@ -1053,6 +1053,32 @@
 }
 
 ObjectFile::Strata ObjectFilePECOFF::CalculateStrata() { return eStrataUser; }
+
+static bool IsCompressedBss(const Section &section) {
+  if (section.GetName() != ConstString(".data"))
+    return false;
+  if (section.GetFileSize() != 0)
+    return false;
+  if (section.GetFileOffset() != 0)
+    return false;
+  return true;
+}
+
+size_t ObjectFilePECOFF::ReadSectionData(Section *section,
+                                         lldb::offset_t section_offset,
+                                         void *dst, size_t dst_len) {
+  if (!IsCompressedBss(*section))
+    return ObjectFile::ReadSectionData(section, section_offset, dst, dst_len);
+
+  if (section_offset >= section->GetByteSize())
+    return 0;
+
+  size_t bytes_avail = section->GetByteSize() - section_offset;
+  size_t read_size = std::min(dst_len, bytes_avail);
+  ::memset(dst, 0, read_size);
+  return read_size;
+}
+
 //------------------------------------------------------------------
 // PluginInterface protocol
 //------------------------------------------------------------------