[lld] r348306 - [PDB] Emit S_UDT records in LLD.

Zachary Turner via llvm-commits llvm-commits at lists.llvm.org
Tue Dec 4 13:48:46 PST 2018


Author: zturner
Date: Tue Dec  4 13:48:46 2018
New Revision: 348306

URL: http://llvm.org/viewvc/llvm-project?rev=348306&view=rev
Log:
[PDB] Emit S_UDT records in LLD.

Previously these were dropped.  We now understand them sufficiently
well to start emitting them.  From the debugger's perspective, this
now enables us to have debug info about typedefs (both global and
function-locally scoped)

Differential Revision: https://reviews.llvm.org/D55228

Added:
    lld/trunk/test/COFF/s_udt.s
Modified:
    lld/trunk/COFF/PDB.cpp
    lld/trunk/test/COFF/pdb-globals.test
    lld/trunk/test/COFF/pdb-symbol-types.yaml
    lld/trunk/test/COFF/pdb-type-server-simple.test

Modified: lld/trunk/COFF/PDB.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/PDB.cpp?rev=348306&r1=348305&r2=348306&view=diff
==============================================================================
--- lld/trunk/COFF/PDB.cpp (original)
+++ lld/trunk/COFF/PDB.cpp Tue Dec  4 13:48:46 2018
@@ -959,11 +959,10 @@ static void scopeStackClose(SmallVectorI
   S.OpeningRecord->PtrEnd = CurOffset;
 }
 
-static bool symbolGoesInModuleStream(const CVSymbol &Sym) {
+static bool symbolGoesInModuleStream(const CVSymbol &Sym, bool IsGlobalScope) {
   switch (Sym.kind()) {
   case SymbolKind::S_GDATA32:
   case SymbolKind::S_CONSTANT:
-  case SymbolKind::S_UDT:
   // We really should not be seeing S_PROCREF and S_LPROCREF in the first place
   // since they are synthesized by the linker in response to S_GPROC32 and
   // S_LPROC32, but if we do see them, don't put them in the module stream I
@@ -971,6 +970,9 @@ static bool symbolGoesInModuleStream(con
   case SymbolKind::S_PROCREF:
   case SymbolKind::S_LPROCREF:
     return false;
+  // S_UDT records go in the module stream if it is not a global S_UDT.
+  case SymbolKind::S_UDT:
+    return !IsGlobalScope;
   // S_GDATA32 does not go in the module stream, but S_LDATA32 does.
   case SymbolKind::S_LDATA32:
   default:
@@ -978,7 +980,7 @@ static bool symbolGoesInModuleStream(con
   }
 }
 
-static bool symbolGoesInGlobalsStream(const CVSymbol &Sym) {
+static bool symbolGoesInGlobalsStream(const CVSymbol &Sym, bool IsGlobalScope) {
   switch (Sym.kind()) {
   case SymbolKind::S_CONSTANT:
   case SymbolKind::S_GDATA32:
@@ -992,13 +994,9 @@ static bool symbolGoesInGlobalsStream(co
   case SymbolKind::S_PROCREF:
   case SymbolKind::S_LPROCREF:
     return true;
-  // FIXME: For now, we drop all S_UDT symbols (i.e. they don't go in the
-  // globals stream or the modules stream).  These have special handling which
-  // needs more investigation before we can get right, but by putting them all
-  // into the globals stream WinDbg fails to display local variables of class
-  // types saying that it cannot find the type Foo *.  So as a stopgap just to
-  // keep things working, we drop them.
+  // S_UDT records go in the globals stream if it is a global S_UDT.
   case SymbolKind::S_UDT:
+    return IsGlobalScope;
   default:
     return false;
   }
@@ -1121,11 +1119,11 @@ void PDBLinker::mergeSymbolRecords(ObjFi
         // adding the symbol to the module since we may need to get the next
         // symbol offset, and writing to the module's symbol stream will update
         // that offset.
-        if (symbolGoesInGlobalsStream(Sym))
+        if (symbolGoesInGlobalsStream(Sym, Scopes.empty()))
           addGlobalSymbol(Builder.getGsiBuilder(),
                           File->ModuleDBI->getModuleIndex(), CurSymOffset, Sym);
 
-        if (symbolGoesInModuleStream(Sym)) {
+        if (symbolGoesInModuleStream(Sym, Scopes.empty())) {
           // Add symbols to the module in bulk. If this symbol is contiguous
           // with the previous run of symbols to add, combine the ranges. If
           // not, close the previous range of symbols and start a new one.

Modified: lld/trunk/test/COFF/pdb-globals.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/pdb-globals.test?rev=348306&r1=348305&r2=348306&view=diff
==============================================================================
--- lld/trunk/test/COFF/pdb-globals.test (original)
+++ lld/trunk/test/COFF/pdb-globals.test Tue Dec  4 13:48:46 2018
@@ -15,6 +15,8 @@ RUN: llvm-pdbutil dump -symbols -globals
 CHECK-LABEL:                        Global Symbols
 CHECK-NEXT:  ============================================================
 CHECK-NEXT:   Records
+CHECK-NEXT:      340 | S_UDT [size = 20] `HelloPoint`
+CHECK-NEXT:            original type = 0x1007
 CHECK-NEXT:      208 | S_LPROCREF [size = 24] `LocalFunc`
 CHECK-NEXT:            module = 1, sum name = 0, offset = 292
 CHECK-NEXT:      160 | S_PROCREF [size = 28] `GlobalFunc`
@@ -25,9 +27,11 @@ CHECK-NEXT:      232 | S_GDATA32 [size =
 CHECK-NEXT:            type = 0x0403 (void*), addr = 0003:0004
 CHECK-NEXT:      260 | S_GDATA32 [size = 24] `GlobalVar`
 CHECK-NEXT:            type = 0x100B (const int*), addr = 0003:0000
+CHECK-NEXT:      312 | S_UDT [size = 28] `HelloPointTypedef`
+CHECK-NEXT:            original type = 0x1005
 CHECK-NEXT:      284 | S_LDATA32 [size = 28] `ConstantVar`
 CHECK-NEXT:            type = 0x100A (const int), addr = 0002:0000
-CHECK-NEXT:      312 | S_PROCREF [size = 40] `HelloPoint::HelloPoint`
+CHECK-NEXT:      360 | S_PROCREF [size = 40] `HelloPoint::HelloPoint`
 CHECK-NEXT:            module = 1, sum name = 0, offset = 376
 
 CHECK-LABEL:                           Symbols

Modified: lld/trunk/test/COFF/pdb-symbol-types.yaml
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/pdb-symbol-types.yaml?rev=348306&r1=348305&r2=348306&view=diff
==============================================================================
--- lld/trunk/test/COFF/pdb-symbol-types.yaml (original)
+++ lld/trunk/test/COFF/pdb-symbol-types.yaml Tue Dec  4 13:48:46 2018
@@ -17,9 +17,13 @@
 # CHECK-NEXT:  ============================================================
 # CHECK-NEXT:   Records
 # CHECK-NEXT:       48 | S_PROCREF [size = 20] `main`
-# CHECK-NEXT:             module = 1, sum name = 0, offset = 116
+# CHECK-NEXT:            module = 1, sum name = 0, offset = 116
+# CHECK-NEXT:       96 | S_UDT [size = 16] `UDT_Foo`
+# CHECK-NEXT:            original type = 0x1004
+# CHECK-NEXT:      112 | S_UDT [size = 12] `Foo`
+# CHECK-NEXT:            original type = 0x1004
 # CHECK-NEXT:       68 | S_GDATA32 [size = 28] `global_foo`
-# CHECK-NEXT:             type = 0x1004 (Foo), addr = 0003:0000
+# CHECK-NEXT:            type = 0x1004 (Foo), addr = 0003:0000
 
 # CHECK:                           Symbols
 # CHECK: ============================================================

Modified: lld/trunk/test/COFF/pdb-type-server-simple.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/pdb-type-server-simple.test?rev=348306&r1=348305&r2=348306&view=diff
==============================================================================
--- lld/trunk/test/COFF/pdb-type-server-simple.test (original)
+++ lld/trunk/test/COFF/pdb-type-server-simple.test Tue Dec  4 13:48:46 2018
@@ -62,10 +62,12 @@ CHECK:            {{.*}}: `b.c`
 CHECK-LABEL:                       Global Symbols
 CHECK:       ============================================================
 CHECK-NEXT:    Records
-CHECK-NEXT:        36 | S_PROCREF [size = 20] `main`
-CHECK-NEXT:             module = 1, sum name = 0, offset = 104
-CHECK-NEXT:        56 | S_PROCREF [size = 16] `g`
-CHECK-NEXT:             module = 2, sum name = 0, offset = 104
+CHECK-NEXT:       36 | S_PROCREF [size = 20] `main`
+CHECK-NEXT:            module = 1, sum name = 0, offset = 104
+CHECK-NEXT:       68 | S_PROCREF [size = 16] `g`
+CHECK-NEXT:            module = 2, sum name = 0, offset = 104
+CHECK-NEXT:       56 | S_UDT [size = 12] `Foo`
+CHECK-NEXT:            original type = 0x1006
 
 CHECK-LABEL:                           Symbols
 CHECK: ============================================================

Added: lld/trunk/test/COFF/s_udt.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/s_udt.s?rev=348306&view=auto
==============================================================================
--- lld/trunk/test/COFF/s_udt.s (added)
+++ lld/trunk/test/COFF/s_udt.s Tue Dec  4 13:48:46 2018
@@ -0,0 +1,475 @@
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-windows-msvc < %s > %t.obj
+# RUN: lld-link /DEBUG:FULL /nodefaultlib /entry:main %t.obj /PDB:%t.pdb /OUT:%t.exe
+# RUN: llvm-pdbutil dump -types -globals -symbols -modi=0 %t.pdb | FileCheck %s
+
+# CHECK:                               Types (TPI Stream)
+# CHECK-NEXT: ============================================================
+# CHECK:      0x1003 | LF_STRUCTURE [size = 44] `Struct`
+# CHECK-NEXT:          unique name: `.?AUStruct@@`
+# CHECK-NEXT:          vtable: <no type>, base list: <no type>, field list: <no type>
+# CHECK-NEXT:          options: forward ref (-> 0x1006) | has unique name, sizeof 0
+# CHECK-NEXT: 0x1004 | LF_POINTER [size = 12]
+# CHECK-NEXT:          referent = 0x1003, mode = pointer, opts = None, kind = ptr64
+# CHECK:      0x1006 | LF_STRUCTURE [size = 44] `Struct`
+# CHECK-NEXT:          unique name: `.?AUStruct@@`
+# CHECK-NEXT:          vtable: <no type>, base list: <no type>, field list: 0x1005
+# CHECK-NEXT:          options: has unique name, sizeof 4
+# CHECK:                               Global Symbols
+# CHECK-NEXT: ============================================================
+# CHECK:      {{.*}} | S_UDT [size = 24] `StructTypedef`
+# CHECK:               original type = 0x1003
+# CHECK:      {{.*}} | S_UDT [size = 16] `Struct`
+# CHECK:               original type = 0x1006
+# CHECK:      {{.*}} | S_UDT [size = 20] `IntTypedef`
+# CHECK:               original type = 0x0074 (int)
+# CHECK:                               Symbols
+# CHECK-NEXT: ============================================================
+# CHECK:      {{.*}} | S_GPROC32 [size = 44] `main`
+# CHECK-NEXT:          parent = 0, end = 252, addr = 0001:0000, code size = 52
+# CHECK-NEXT:          type = `0x1002 (int (int, char**))`, debug start = 0, debug end = 0, flags = none
+# CHECK-NOT:  {{.*}} | S_END
+# CHECK:      {{.*}} | S_UDT [size = 28] `main::LocalTypedef`
+# CHECK-NEXT:          original type = 0x1004
+# CHECK:      {{.*}} | S_END [size = 4]
+
+# source code to re-generate:
+# clang-cl /Z7 /GS- /GR- /c foo.cpp
+#
+# struct Struct {
+#   int x;
+# };
+# 
+# using IntTypedef = int;
+# using StructTypedef = Struct;
+# Struct S;
+# StructTypedef SS;
+# IntTypedef I;
+# 
+# int main(int argc, char **argv) {
+#   using LocalTypedef = Struct*;
+#   LocalTypedef SPtr;
+#   return I + S.x + SS.x + SPtr->x;
+# }
+
+	.text
+	.def	 @feat.00;
+	.scl	3;
+	.type	0;
+	.endef
+	.globl	@feat.00
+.set @feat.00, 0
+	.intel_syntax noprefix
+	.def	 main;
+	.scl	2;
+	.type	32;
+	.endef
+	.globl	main                    # -- Begin function main
+	.p2align	4, 0x90
+main:                                   # @main
+.Lfunc_begin0:
+	.cv_func_id 0
+	.cv_file	1 "D:\\src\\llvmbuild\\cl\\Debug\\x64\\foo.cpp" "2B62298EE3EEF94E1D81FDFE18BD46A6" 1
+	.cv_loc	0 1 12 0                # foo.cpp:12:0
+.seh_proc main
+# %bb.0:                                # %entry
+	sub	rsp, 32
+	.seh_stackalloc 32
+	.seh_endprologue
+	mov	dword ptr [rsp + 28], 0
+	mov	qword ptr [rsp + 16], rdx
+	mov	dword ptr [rsp + 12], ecx
+.Ltmp0:
+	.cv_loc	0 1 15 0                # foo.cpp:15:0
+	mov	ecx, dword ptr [rip + "?I@@3HA"]
+	add	ecx, dword ptr [rip + "?S@@3UStruct@@A"]
+	add	ecx, dword ptr [rip + "?SS@@3UStruct@@A"]
+	mov	rdx, qword ptr [rsp]
+	add	ecx, dword ptr [rdx]
+	mov	eax, ecx
+	add	rsp, 32
+	ret
+.Ltmp1:
+.Lfunc_end0:
+	.seh_handlerdata
+	.text
+	.seh_endproc
+                                        # -- End function
+	.bss
+	.globl	"?S@@3UStruct@@A"       # @"?S@@3UStruct@@A"
+	.p2align	2
+"?S@@3UStruct@@A":
+	.zero	4
+
+	.globl	"?SS@@3UStruct@@A"      # @"?SS@@3UStruct@@A"
+	.p2align	2
+"?SS@@3UStruct@@A":
+	.zero	4
+
+	.globl	"?I@@3HA"               # @"?I@@3HA"
+	.p2align	2
+"?I@@3HA":
+	.long	0                       # 0x0
+
+	.section	.drectve,"yn"
+	.ascii	" /DEFAULTLIB:libcmt.lib"
+	.ascii	" /DEFAULTLIB:oldnames.lib"
+	.section	.debug$S,"dr"
+	.p2align	2
+	.long	4                       # Debug section magic
+	.long	241
+	.long	.Ltmp3-.Ltmp2           # Subsection size
+.Ltmp2:
+	.short	.Ltmp5-.Ltmp4           # Record length
+.Ltmp4:
+	.short	4412                    # Record kind: S_COMPILE3
+	.long	1                       # Flags and language
+	.short	208                     # CPUType
+	.short	8                       # Frontend version
+	.short	0
+	.short	0
+	.short	0
+	.short	8000                    # Backend version
+	.short	0
+	.short	0
+	.short	0
+	.asciz	"clang version 8.0.0 "  # Null-terminated compiler version string
+.Ltmp5:
+.Ltmp3:
+	.p2align	2
+	.long	241                     # Symbol subsection for main
+	.long	.Ltmp7-.Ltmp6           # Subsection size
+.Ltmp6:
+	.short	.Ltmp9-.Ltmp8           # Record length
+.Ltmp8:
+	.short	4423                    # Record kind: S_GPROC32_ID
+	.long	0                       # PtrParent
+	.long	0                       # PtrEnd
+	.long	0                       # PtrNext
+	.long	.Lfunc_end0-main        # Code size
+	.long	0                       # Offset after prologue
+	.long	0                       # Offset before epilogue
+	.long	4099                    # Function type index
+	.secrel32	main            # Function section relative address
+	.secidx	main                    # Function section index
+	.byte	0                       # Flags
+	.asciz	"main"                  # Function name
+.Ltmp9:
+	.short	.Ltmp11-.Ltmp10         # Record length
+.Ltmp10:
+	.short	4114                    # Record kind: S_FRAMEPROC
+	.long	32                      # FrameSize
+	.long	0                       # Padding
+	.long	0                       # Offset of padding
+	.long	0                       # Bytes of callee saved registers
+	.long	0                       # Exception handler offset
+	.short	0                       # Exception handler section
+	.long	81920                   # Flags (defines frame register)
+.Ltmp11:
+	.short	.Ltmp13-.Ltmp12         # Record length
+.Ltmp12:
+	.short	4414                    # Record kind: S_LOCAL
+	.long	116                     # TypeIndex
+	.short	1                       # Flags
+	.asciz	"argc"
+.Ltmp13:
+	.cv_def_range	 .Ltmp0 .Ltmp1, "B\021\f\000\000\000"
+	.short	.Ltmp15-.Ltmp14         # Record length
+.Ltmp14:
+	.short	4414                    # Record kind: S_LOCAL
+	.long	4096                    # TypeIndex
+	.short	1                       # Flags
+	.asciz	"argv"
+.Ltmp15:
+	.cv_def_range	 .Ltmp0 .Ltmp1, "B\021\020\000\000\000"
+	.short	.Ltmp17-.Ltmp16         # Record length
+.Ltmp16:
+	.short	4414                    # Record kind: S_LOCAL
+	.long	4101                    # TypeIndex
+	.short	0                       # Flags
+	.asciz	"SPtr"
+.Ltmp17:
+	.cv_def_range	 .Ltmp0 .Ltmp1, "B\021\000\000\000\000"
+	.short	.Ltmp19-.Ltmp18         # Record length
+.Ltmp18:
+	.short	4360                    # Record kind: S_UDT
+	.long	4101                    # Type
+	.asciz	"main::LocalTypedef"
+.Ltmp19:
+	.short	2                       # Record length
+	.short	4431                    # Record kind: S_PROC_ID_END
+.Ltmp7:
+	.p2align	2
+	.cv_linetable	0, main, .Lfunc_end0
+	.long	241                     # Symbol subsection for globals
+	.long	.Ltmp21-.Ltmp20         # Subsection size
+.Ltmp20:
+	.short	.Ltmp23-.Ltmp22         # Record length
+.Ltmp22:
+	.short	4365                    # Record kind: S_GDATA32
+	.long	4103                    # Type
+	.secrel32	"?S@@3UStruct@@A" # DataOffset
+	.secidx	"?S@@3UStruct@@A"       # Segment
+	.asciz	"S"                     # Name
+.Ltmp23:
+	.short	.Ltmp25-.Ltmp24         # Record length
+.Ltmp24:
+	.short	4365                    # Record kind: S_GDATA32
+	.long	4100                    # Type
+	.secrel32	"?SS@@3UStruct@@A" # DataOffset
+	.secidx	"?SS@@3UStruct@@A"      # Segment
+	.asciz	"SS"                    # Name
+.Ltmp25:
+	.short	.Ltmp27-.Ltmp26         # Record length
+.Ltmp26:
+	.short	4365                    # Record kind: S_GDATA32
+	.long	116                     # Type
+	.secrel32	"?I@@3HA"       # DataOffset
+	.secidx	"?I@@3HA"               # Segment
+	.asciz	"I"                     # Name
+.Ltmp27:
+.Ltmp21:
+	.p2align	2
+	.long	241
+	.long	.Ltmp29-.Ltmp28         # Subsection size
+.Ltmp28:
+	.short	.Ltmp31-.Ltmp30         # Record length
+.Ltmp30:
+	.short	4360                    # Record kind: S_UDT
+	.long	4103                    # Type
+	.asciz	"Struct"
+.Ltmp31:
+	.short	.Ltmp33-.Ltmp32         # Record length
+.Ltmp32:
+	.short	4360                    # Record kind: S_UDT
+	.long	4100                    # Type
+	.asciz	"StructTypedef"
+.Ltmp33:
+	.short	.Ltmp35-.Ltmp34         # Record length
+.Ltmp34:
+	.short	4360                    # Record kind: S_UDT
+	.long	116                     # Type
+	.asciz	"IntTypedef"
+.Ltmp35:
+.Ltmp29:
+	.p2align	2
+	.cv_filechecksums               # File index to string table offset subsection
+	.cv_stringtable                 # String table
+	.long	241
+	.long	.Ltmp37-.Ltmp36         # Subsection size
+.Ltmp36:
+	.short	6                       # Record length
+	.short	4428                    # Record kind: S_BUILDINFO
+	.long	4108                    # LF_BUILDINFO index
+.Ltmp37:
+	.p2align	2
+	.section	.debug$T,"dr"
+	.p2align	2
+	.long	4                       # Debug section magic
+	# Pointer (0x1000) {
+	#   TypeLeafKind: LF_POINTER (0x1002)
+	#   PointeeType: char* (0x670)
+	#   PtrType: Near64 (0xC)
+	#   PtrMode: Pointer (0x0)
+	#   IsFlat: 0
+	#   IsConst: 0
+	#   IsVolatile: 0
+	#   IsUnaligned: 0
+	#   IsRestrict: 0
+	#   IsThisPtr&: 0
+	#   IsThisPtr&&: 0
+	#   SizeOf: 8
+	# }
+	.byte	0x0a, 0x00, 0x02, 0x10
+	.byte	0x70, 0x06, 0x00, 0x00
+	.byte	0x0c, 0x00, 0x01, 0x00
+	# ArgList (0x1001) {
+	#   TypeLeafKind: LF_ARGLIST (0x1201)
+	#   NumArgs: 2
+	#   Arguments [
+	#     ArgType: int (0x74)
+	#     ArgType: char** (0x1000)
+	#   ]
+	# }
+	.byte	0x0e, 0x00, 0x01, 0x12
+	.byte	0x02, 0x00, 0x00, 0x00
+	.byte	0x74, 0x00, 0x00, 0x00
+	.byte	0x00, 0x10, 0x00, 0x00
+	# Procedure (0x1002) {
+	#   TypeLeafKind: LF_PROCEDURE (0x1008)
+	#   ReturnType: int (0x74)
+	#   CallingConvention: NearC (0x0)
+	#   FunctionOptions [ (0x0)
+	#   ]
+	#   NumParameters: 2
+	#   ArgListType: (int, char**) (0x1001)
+	# }
+	.byte	0x0e, 0x00, 0x08, 0x10
+	.byte	0x74, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x02, 0x00
+	.byte	0x01, 0x10, 0x00, 0x00
+	# FuncId (0x1003) {
+	#   TypeLeafKind: LF_FUNC_ID (0x1601)
+	#   ParentScope: 0x0
+	#   FunctionType: int (int, char**) (0x1002)
+	#   Name: main
+	# }
+	.byte	0x12, 0x00, 0x01, 0x16
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x02, 0x10, 0x00, 0x00
+	.byte	0x6d, 0x61, 0x69, 0x6e
+	.byte	0x00, 0xf3, 0xf2, 0xf1
+	# Struct (0x1004) {
+	#   TypeLeafKind: LF_STRUCTURE (0x1505)
+	#   MemberCount: 0
+	#   Properties [ (0x280)
+	#     ForwardReference (0x80)
+	#     HasUniqueName (0x200)
+	#   ]
+	#   FieldList: 0x0
+	#   DerivedFrom: 0x0
+	#   VShape: 0x0
+	#   SizeOf: 0
+	#   Name: Struct
+	#   LinkageName: .?AUStruct@@
+	# }
+	.byte	0x2a, 0x00, 0x05, 0x15
+	.byte	0x00, 0x00, 0x80, 0x02
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x53, 0x74
+	.byte	0x72, 0x75, 0x63, 0x74
+	.byte	0x00, 0x2e, 0x3f, 0x41
+	.byte	0x55, 0x53, 0x74, 0x72
+	.byte	0x75, 0x63, 0x74, 0x40
+	.byte	0x40, 0x00, 0xf2, 0xf1
+	# Pointer (0x1005) {
+	#   TypeLeafKind: LF_POINTER (0x1002)
+	#   PointeeType: Struct (0x1004)
+	#   PtrType: Near64 (0xC)
+	#   PtrMode: Pointer (0x0)
+	#   IsFlat: 0
+	#   IsConst: 0
+	#   IsVolatile: 0
+	#   IsUnaligned: 0
+	#   IsRestrict: 0
+	#   IsThisPtr&: 0
+	#   IsThisPtr&&: 0
+	#   SizeOf: 8
+	# }
+	.byte	0x0a, 0x00, 0x02, 0x10
+	.byte	0x04, 0x10, 0x00, 0x00
+	.byte	0x0c, 0x00, 0x01, 0x00
+	# FieldList (0x1006) {
+	#   TypeLeafKind: LF_FIELDLIST (0x1203)
+	#   DataMember {
+	#     TypeLeafKind: LF_MEMBER (0x150D)
+	#     AccessSpecifier: Public (0x3)
+	#     Type: int (0x74)
+	#     FieldOffset: 0x0
+	#     Name: x
+	#   }
+	# }
+	.byte	0x0e, 0x00, 0x03, 0x12
+	.byte	0x0d, 0x15, 0x03, 0x00
+	.byte	0x74, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x78, 0x00
+	# Struct (0x1007) {
+	#   TypeLeafKind: LF_STRUCTURE (0x1505)
+	#   MemberCount: 1
+	#   Properties [ (0x200)
+	#     HasUniqueName (0x200)
+	#   ]
+	#   FieldList: <field list> (0x1006)
+	#   DerivedFrom: 0x0
+	#   VShape: 0x0
+	#   SizeOf: 4
+	#   Name: Struct
+	#   LinkageName: .?AUStruct@@
+	# }
+	.byte	0x2a, 0x00, 0x05, 0x15
+	.byte	0x01, 0x00, 0x00, 0x02
+	.byte	0x06, 0x10, 0x00, 0x00
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x04, 0x00, 0x53, 0x74
+	.byte	0x72, 0x75, 0x63, 0x74
+	.byte	0x00, 0x2e, 0x3f, 0x41
+	.byte	0x55, 0x53, 0x74, 0x72
+	.byte	0x75, 0x63, 0x74, 0x40
+	.byte	0x40, 0x00, 0xf2, 0xf1
+	# StringId (0x1008) {
+	#   TypeLeafKind: LF_STRING_ID (0x1605)
+	#   Id: 0x0
+	#   StringData: D:\src\llvmbuild\cl\Debug\x64\foo.cpp
+	# }
+	.byte	0x2e, 0x00, 0x05, 0x16
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x44, 0x3a, 0x5c, 0x73
+	.byte	0x72, 0x63, 0x5c, 0x6c
+	.byte	0x6c, 0x76, 0x6d, 0x62
+	.byte	0x75, 0x69, 0x6c, 0x64
+	.byte	0x5c, 0x63, 0x6c, 0x5c
+	.byte	0x44, 0x65, 0x62, 0x75
+	.byte	0x67, 0x5c, 0x78, 0x36
+	.byte	0x34, 0x5c, 0x66, 0x6f
+	.byte	0x6f, 0x2e, 0x63, 0x70
+	.byte	0x70, 0x00, 0xf2, 0xf1
+	# UdtSourceLine (0x1009) {
+	#   TypeLeafKind: LF_UDT_SRC_LINE (0x1606)
+	#   UDT: Struct (0x1007)
+	#   SourceFile: D:\src\llvmbuild\cl\Debug\x64\foo.cpp (0x1008)
+	#   LineNumber: 1
+	# }
+	.byte	0x0e, 0x00, 0x06, 0x16
+	.byte	0x07, 0x10, 0x00, 0x00
+	.byte	0x08, 0x10, 0x00, 0x00
+	.byte	0x01, 0x00, 0x00, 0x00
+	# StringId (0x100A) {
+	#   TypeLeafKind: LF_STRING_ID (0x1605)
+	#   Id: 0x0
+	#   StringData: D:\\src\\llvmbuild\\cl\\Debug\\x64
+	# }
+	.byte	0x2a, 0x00, 0x05, 0x16
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x44, 0x3a, 0x5c, 0x5c
+	.byte	0x73, 0x72, 0x63, 0x5c
+	.byte	0x5c, 0x6c, 0x6c, 0x76
+	.byte	0x6d, 0x62, 0x75, 0x69
+	.byte	0x6c, 0x64, 0x5c, 0x5c
+	.byte	0x63, 0x6c, 0x5c, 0x5c
+	.byte	0x44, 0x65, 0x62, 0x75
+	.byte	0x67, 0x5c, 0x5c, 0x78
+	.byte	0x36, 0x34, 0x00, 0xf1
+	# StringId (0x100B) {
+	#   TypeLeafKind: LF_STRING_ID (0x1605)
+	#   Id: 0x0
+	#   StringData: foo.cpp
+	# }
+	.byte	0x0e, 0x00, 0x05, 0x16
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x66, 0x6f, 0x6f, 0x2e
+	.byte	0x63, 0x70, 0x70, 0x00
+	# BuildInfo (0x100C) {
+	#   TypeLeafKind: LF_BUILDINFO (0x1603)
+	#   NumArgs: 5
+	#   Arguments [
+	#     ArgType: D:\\src\\llvmbuild\\cl\\Debug\\x64 (0x100A)
+	#     ArgType: 0x0
+	#     ArgType: foo.cpp (0x100B)
+	#     ArgType: 0x0
+	#     ArgType: 0x0
+	#   ]
+	# }
+	.byte	0x1a, 0x00, 0x03, 0x16
+	.byte	0x05, 0x00, 0x0a, 0x10
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x0b, 0x10
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0x00, 0x00
+	.byte	0x00, 0x00, 0xf2, 0xf1
+
+	.addrsig
+	.addrsig_sym "?S@@3UStruct@@A"
+	.addrsig_sym "?SS@@3UStruct@@A"
+	.addrsig_sym "?I@@3HA"




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