[Lldb-commits] [lldb] d21b417 - [LLDB][NativePDB] ResolveSymbolContext should return the innermost block
Zequan Wu via lldb-commits
lldb-commits at lists.llvm.org
Fri Sep 16 10:19:20 PDT 2022
Author: Zequan Wu
Date: 2022-09-16T10:19:09-07:00
New Revision: d21b417025f8051638f467007af957f2ed9f614a
URL: https://github.com/llvm/llvm-project/commit/d21b417025f8051638f467007af957f2ed9f614a
DIFF: https://github.com/llvm/llvm-project/commit/d21b417025f8051638f467007af957f2ed9f614a.diff
LOG: [LLDB][NativePDB] ResolveSymbolContext should return the innermost block
Before, it returns the outermost blocks if nested blocks have the same
address range. That casuses lldb unable to find variables that are inside
inner blocks.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D133601
Added:
lldb/test/Shell/SymbolFile/NativePDB/nested-blocks-same-address.s
Modified:
lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
Removed:
################################################################################
diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
index 3bcebb6d46f63..304b649043522 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
@@ -1054,8 +1054,15 @@ uint32_t SymbolFileNativePDB::ResolveSymbolContext(
}
if (type == PDB_SymType::Block) {
- sc.block = &GetOrCreateBlock(csid);
- sc.function = sc.block->CalculateSymbolContextFunction();
+ Block &block = GetOrCreateBlock(csid);
+ sc.function = block.CalculateSymbolContextFunction();
+ if (sc.function) {
+ sc.function->GetBlock(true);
+ addr_t func_base =
+ sc.function->GetAddressRange().GetBaseAddress().GetFileAddress();
+ addr_t offset = file_addr - func_base;
+ sc.block = block.FindInnermostBlockByOffset(offset);
+ }
}
if (sc.function)
resolved_flags |= eSymbolContextFunction;
diff --git a/lldb/test/Shell/SymbolFile/NativePDB/nested-blocks-same-address.s b/lldb/test/Shell/SymbolFile/NativePDB/nested-blocks-same-address.s
new file mode 100644
index 0000000000000..0ab76dacdaded
--- /dev/null
+++ b/lldb/test/Shell/SymbolFile/NativePDB/nested-blocks-same-address.s
@@ -0,0 +1,397 @@
+# clang-format off
+# REQUIRES: lld, x86
+
+# Test when nested S_BLOCK32 have same address range, ResolveSymbolContext should return the innnermost block.
+# RUN: llvm-mc -triple=x86_64-windows-msvc --filetype=obj %s > %t.obj
+# RUN: lld-link /debug:full /nodefaultlib /entry:main %t.obj /out:%t.exe /base:0x140000000
+# RUN: env LLDB_USE_NATIVE_PDB_READER=1 %lldb -f %t.exe -o "image lookup -a 0x14000103c -v" -o "exit" | FileCheck %s
+
+# This file is compiled from following source file:
+# $ clang-cl /Z7 /GS- /c /O2 test.cpp /Fatest.s
+# __attribute__((optnone)) bool func(const char* cp, volatile char p[]) {
+# return false;
+# }
+#
+# int main() {
+# const char* const kMfDLLs[] = {"a"};
+# asm("nop");
+# for (const char* kMfDLL : kMfDLLs) {
+# volatile char path[10] = {0};
+# if (func(kMfDLL, path))
+# break;
+# }
+# return 0;
+# }
+
+# CHECK: Function: id = {{.*}}, name = "main", range = [0x0000000140001020-0x000000014000104d)
+# CHECK-NEXT: FuncType: id = {{.*}}, byte-size = 0, compiler_type = "int (void)"
+# CHECK-NEXT: Blocks: id = {{.*}}, range = [0x140001020-0x14000104d)
+# CHECK-NEXT: id = {{.*}}, range = [0x140001025-0x140001046)
+# CHECK-NEXT: id = {{.*}}, range = [0x140001025-0x140001046)
+# CHECK-NEXT: id = {{.*}}, range = [0x140001025-0x140001046)
+# CHECK-NEXT: LineEntry: [0x0000000140001035-0x0000000140001046): /tmp/test.cpp:10
+# CHECK-NEXT: Variable: id = {{.*}}, name = "path", type = "volatile char[10]", valid ranges = <block>, location = [0x0000000140001025, 0x0000000140001046) -> DW_OP_breg7 RSP+40, decl =
+# CHECK-NEXT: Variable: id = {{.*}}, name = "kMfDLL", type = "const char *", valid ranges = <block>, location = [0x000000014000103c, 0x0000000140001046) -> DW_OP_reg2 RCX, decl =
+# CHECK-NEXT: Variable: id = {{.*}}, name = "__range1", type = "const char *const (&)[1]", valid ranges = <block>, location = <empty>, decl =
+# CHECK-NEXT: Variable: id = {{.*}}, name = "__begin1", type = "const char *const *", valid ranges = <block>, location = <empty>, decl =
+# CHECK-NEXT: Variable: id = {{.*}}, name = "__end1", type = "const char *const *", valid ranges = <block>, location = <empty>, decl =
+# CHECK-NEXT: Variable: id = {{.*}}, name = "kMfDLLs", type = "const char *const[1]", valid ranges = <block>, location = [0x000000014000103c, 0x0000000140001046) -> DW_OP_reg2 RCX, decl =
+
+
+ .text
+ .def @feat.00;
+ .scl 3;
+ .type 0;
+ .endef
+ .globl @feat.00
+.set @feat.00, 0
+ .intel_syntax noprefix
+ .file "test.cpp"
+ .def "?func@@YA_NPEBDQECD at Z";
+ .scl 2;
+ .type 32;
+ .endef
+ .section .text,"xr",one_only,"?func@@YA_NPEBDQECD at Z"
+ .globl "?func@@YA_NPEBDQECD at Z" # -- Begin function ?func@@YA_NPEBDQECD at Z
+ .p2align 4, 0x90
+"?func@@YA_NPEBDQECD at Z": # @"?func@@YA_NPEBDQECD at Z"
+.Lfunc_begin0:
+ .cv_func_id 0
+ .cv_file 1 "/tmp/test.cpp" "8CDAA03EE93954606427F9B409CE7638" 1
+ .cv_loc 0 1 1 0 # test.cpp:1:0
+.seh_proc "?func@@YA_NPEBDQECD at Z"
+# %bb.0: # %entry
+ sub rsp, 16
+ .seh_stackalloc 16
+ .seh_endprologue
+ mov qword ptr [rsp + 8], rdx
+ mov qword ptr [rsp], rcx
+.Ltmp0:
+ .cv_loc 0 1 2 0 # test.cpp:2:0
+ xor eax, eax
+ and al, 1
+ movzx eax, al
+ add rsp, 16
+ ret
+.Ltmp1:
+.Lfunc_end0:
+ .seh_endproc
+ # -- End function
+ .def main;
+ .scl 2;
+ .type 32;
+ .endef
+ .section .text,"xr",one_only,main
+ .globl main # -- Begin function main
+ .p2align 4, 0x90
+main: # @main
+.Lfunc_begin1:
+ .cv_func_id 1
+ .cv_loc 1 1 5 0 # test.cpp:5:0
+.seh_proc main
+# %bb.0: # %entry
+ sub rsp, 56
+ .seh_stackalloc 56
+ .seh_endprologue
+.Ltmp2:
+ .cv_loc 1 1 7 0 # test.cpp:7:0
+ #APP
+ nop
+ #NO_APP
+.Ltmp3:
+ #DEBUG_VALUE: __range1 <- undef
+ #DEBUG_VALUE: __begin1 <- undef
+ #DEBUG_VALUE: __end1 <- [DW_OP_plus_uconst 8, DW_OP_stack_value] undef
+ .cv_loc 1 1 9 0 # test.cpp:9:0
+ mov word ptr [rsp + 48], 0
+ mov qword ptr [rsp + 40], 0
+ .cv_loc 1 1 10 0 # test.cpp:10:0
+ lea rcx, [rip + "??_C at _01MCMALHOG@a?$AA@"]
+.Ltmp4:
+ #DEBUG_VALUE: main:kMfDLLs <- $rcx
+ #DEBUG_VALUE: kMfDLL <- $rcx
+ lea rdx, [rsp + 40]
+ call "?func@@YA_NPEBDQECD at Z"
+.Ltmp5:
+ #DEBUG_VALUE: __begin1 <- [DW_OP_LLVM_arg 0, DW_OP_LLVM_arg 1, DW_OP_constu 8, DW_OP_mul, DW_OP_plus, DW_OP_stack_value] undef, undef
+ .cv_loc 1 1 14 0 # test.cpp:14:0
+ xor eax, eax
+ add rsp, 56
+ ret
+.Ltmp6:
+.Lfunc_end1:
+ .seh_endproc
+ # -- End function
+ .section .rdata,"dr",discard,"??_C at _01MCMALHOG@a?$AA@"
+ .globl "??_C at _01MCMALHOG@a?$AA@" # @"??_C at _01MCMALHOG@a?$AA@"
+"??_C at _01MCMALHOG@a?$AA@":
+ .asciz "a"
+
+ .section .debug$S,"dr"
+ .p2align 2, 0x0
+ .long 4 # Debug section magic
+ .long 241
+ .long .Ltmp8-.Ltmp7 # Subsection size
+.Ltmp7:
+ .short .Ltmp12-.Ltmp11 # Record length
+.Ltmp11:
+ .short 4412 # Record kind: S_COMPILE3
+ .long 1 # Flags and language
+ .short 208 # CPUType
+ .short 16 # Frontend version
+ .short 0
+ .short 0
+ .short 0
+ .short 16000 # Backend version
+ .short 0
+ .short 0
+ .short 0
+ .asciz "clang version 16.0.0" # Null-terminated compiler version string
+ .p2align 2, 0x0
+.Ltmp12:
+.Ltmp8:
+ .p2align 2, 0x0
+ .section .debug$S,"dr",associative,"?func@@YA_NPEBDQECD at Z"
+ .p2align 2, 0x0
+ .long 4 # Debug section magic
+ .long 241 # Symbol subsection for func
+.Ltmp14:
+ .p2align 2, 0x0
+ .cv_linetable 0, "?func@@YA_NPEBDQECD at Z", .Lfunc_end0
+ .section .debug$S,"dr",associative,main
+ .p2align 2, 0x0
+ .long 4 # Debug section magic
+ .long 241 # Symbol subsection for main
+ .long .Ltmp24-.Ltmp23 # Subsection size
+.Ltmp23:
+ .short .Ltmp26-.Ltmp25 # Record length
+.Ltmp25:
+ .short 4423 # Record kind: S_GPROC32_ID
+ .long 0 # PtrParent
+ .long 0 # PtrEnd
+ .long 0 # PtrNext
+ .long .Lfunc_end1-main # Code size
+ .long 0 # Offset after prologue
+ .long 0 # Offset before epilogue
+ .long 4105 # Function type index
+ .secrel32 main # Function section relative address
+ .secidx main # Function section index
+ .byte 0 # Flags
+ .asciz "main" # Function name
+ .p2align 2, 0x0
+.Ltmp26:
+ .short .Ltmp28-.Ltmp27 # Record length
+.Ltmp27:
+ .short 4114 # Record kind: S_FRAMEPROC
+ .long 56 # 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 1130504 # Flags (defines frame register)
+ .p2align 2, 0x0
+.Ltmp28:
+ .short .Ltmp30-.Ltmp29 # Record length
+.Ltmp29:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4107 # TypeIndex
+ .short 0 # Flags
+ .asciz "kMfDLLs"
+ .p2align 2, 0x0
+.Ltmp30:
+ .cv_def_range .Ltmp4 .Ltmp5, reg, 330
+ .short .Ltmp32-.Ltmp31 # Record length
+.Ltmp31:
+ .short 4355 # Record kind: S_BLOCK32
+ .long 0 # PtrParent
+ .long 0 # PtrEnd
+ .long .Ltmp5-.Ltmp3 # Code size
+ .secrel32 .Ltmp3 # Function section relative address
+ .secidx .Lfunc_begin1 # Function section index
+ .byte 0 # Lexical block name
+ .p2align 2, 0x0
+.Ltmp32:
+ .short .Ltmp34-.Ltmp33 # Record length
+.Ltmp33:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4108 # TypeIndex
+ .short 256 # Flags
+ .asciz "__range1"
+ .p2align 2, 0x0
+.Ltmp34:
+ .short .Ltmp36-.Ltmp35 # Record length
+.Ltmp35:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4109 # TypeIndex
+ .short 256 # Flags
+ .asciz "__begin1"
+ .p2align 2, 0x0
+.Ltmp36:
+ .short .Ltmp38-.Ltmp37 # Record length
+.Ltmp37:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4109 # TypeIndex
+ .short 256 # Flags
+ .asciz "__end1"
+ .p2align 2, 0x0
+.Ltmp38:
+ .short .Ltmp40-.Ltmp39 # Record length
+.Ltmp39:
+ .short 4355 # Record kind: S_BLOCK32
+ .long 0 # PtrParent
+ .long 0 # PtrEnd
+ .long .Ltmp5-.Ltmp3 # Code size
+ .secrel32 .Ltmp3 # Function section relative address
+ .secidx .Lfunc_begin1 # Function section index
+ .byte 0 # Lexical block name
+ .p2align 2, 0x0
+.Ltmp40:
+ .short .Ltmp42-.Ltmp41 # Record length
+.Ltmp41:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4097 # TypeIndex
+ .short 0 # Flags
+ .asciz "kMfDLL"
+ .p2align 2, 0x0
+.Ltmp42:
+ .cv_def_range .Ltmp4 .Ltmp5, reg, 330
+ .short .Ltmp44-.Ltmp43 # Record length
+.Ltmp43:
+ .short 4355 # Record kind: S_BLOCK32
+ .long 0 # PtrParent
+ .long 0 # PtrEnd
+ .long .Ltmp5-.Ltmp3 # Code size
+ .secrel32 .Ltmp3 # Function section relative address
+ .secidx .Lfunc_begin1 # Function section index
+ .byte 0 # Lexical block name
+ .p2align 2, 0x0
+.Ltmp44:
+ .short .Ltmp46-.Ltmp45 # Record length
+.Ltmp45:
+ .short 4414 # Record kind: S_LOCAL
+ .long 4110 # TypeIndex
+ .short 0 # Flags
+ .asciz "path"
+ .p2align 2, 0x0
+.Ltmp46:
+ .cv_def_range .Ltmp3 .Ltmp5, frame_ptr_rel, 40
+ .short 2 # Record length
+ .short 6 # Record kind: S_END
+ .short 2 # Record length
+ .short 6 # Record kind: S_END
+ .short 2 # Record length
+ .short 6 # Record kind: S_END
+ .short 2 # Record length
+ .short 4431 # Record kind: S_PROC_ID_END
+.Ltmp24:
+ .p2align 2, 0x0
+ .cv_linetable 1, main, .Lfunc_end1
+ .section .debug$S,"dr"
+ .cv_filechecksums # File index to string table offset subsection
+ .cv_stringtable # String table
+.Ltmp50:
+.Ltmp48:
+ .p2align 2, 0x0
+ .section .debug$T,"dr"
+ .p2align 2, 0x0
+ .long 4 # Debug section magic
+ # Modifier (0x1000)
+ .short 0xa # Record length
+ .short 0x1001 # Record kind: LF_MODIFIER
+ .long 0x70 # ModifiedType: char
+ .short 0x1 # Modifiers ( Const (0x1) )
+ .byte 242
+ .byte 241
+ # Pointer (0x1001)
+ .short 0xa # Record length
+ .short 0x1002 # Record kind: LF_POINTER
+ .long 0x1000 # PointeeType: const char
+ .long 0x1000c # Attrs: [ Type: Near64, Mode: Pointer, SizeOf: 8 ]
+ # Modifier (0x1002)
+ .short 0xa # Record length
+ .short 0x1001 # Record kind: LF_MODIFIER
+ .long 0x70 # ModifiedType: char
+ .short 0x2 # Modifiers ( Volatile (0x2) )
+ .byte 242
+ .byte 241
+ # Pointer (0x1003)
+ .short 0xa # Record length
+ .short 0x1002 # Record kind: LF_POINTER
+ .long 0x1002 # PointeeType: volatile char
+ .long 0x1000c # Attrs: [ Type: Near64, Mode: Pointer, SizeOf: 8 ]
+ # ArgList (0x1004)
+ .short 0xe # Record length
+ .short 0x1201 # Record kind: LF_ARGLIST
+ .long 0x2 # NumArgs
+ .long 0x1001 # Argument: const char*
+ .long 0x1003 # Argument: volatile char*
+ # Procedure (0x1005)
+ .short 0xe # Record length
+ .short 0x1008 # Record kind: LF_PROCEDURE
+ .long 0x30 # ReturnType: bool
+ .byte 0x0 # CallingConvention: NearC
+ .byte 0x0 # FunctionOptions
+ .short 0x2 # NumParameters
+ .long 0x1004 # ArgListType: (const char*, volatile char*)
+ # FuncId (0x1006)
+ .short 0x12 # Record length
+ .short 0x1601 # Record kind: LF_FUNC_ID
+ .long 0x0 # ParentScope
+ .long 0x1005 # FunctionType: bool (const char*, volatile char*)
+ .asciz "func" # Name
+ .byte 243
+ .byte 242
+ .byte 241
+ # ArgList (0x1007)
+ .short 0x6 # Record length
+ .short 0x1201 # Record kind: LF_ARGLIST
+ .long 0x0 # NumArgs
+ # Procedure (0x1008)
+ .short 0xe # Record length
+ .short 0x1008 # Record kind: LF_PROCEDURE
+ .long 0x74 # ReturnType: int
+ .byte 0x0 # CallingConvention: NearC
+ .byte 0x0 # FunctionOptions
+ .short 0x0 # NumParameters
+ .long 0x1007 # ArgListType: ()
+ # FuncId (0x1009)
+ .short 0x12 # Record length
+ .short 0x1601 # Record kind: LF_FUNC_ID
+ .long 0x0 # ParentScope
+ .long 0x1008 # FunctionType: int ()
+ .asciz "main" # Name
+ .byte 243
+ .byte 242
+ .byte 241
+ # Pointer (0x100A)
+ .short 0xa # Record length
+ .short 0x1002 # Record kind: LF_POINTER
+ .long 0x1000 # PointeeType: const char
+ .long 0x1040c # Attrs: [ Type: Near64, Mode: Pointer, SizeOf: 8, isConst ]
+ # Array (0x100B)
+ .short 0xe # Record length
+ .short 0x1503 # Record kind: LF_ARRAY
+ .long 0x100a # ElementType: const char* const
+ .long 0x23 # IndexType: unsigned __int64
+ .short 0x8 # SizeOf
+ .byte 0 # Name
+ .byte 241
+ # Pointer (0x100C)
+ .short 0xa # Record length
+ .short 0x1002 # Record kind: LF_POINTER
+ .long 0x100b # PointeeType
+ .long 0x1002c # Attrs: [ Type: Near64, Mode: LValueReference, SizeOf: 8 ]
+ # Pointer (0x100D)
+ .short 0xa # Record length
+ .short 0x1002 # Record kind: LF_POINTER
+ .long 0x100a # PointeeType: const char* const
+ .long 0x1000c # Attrs: [ Type: Near64, Mode: Pointer, SizeOf: 8 ]
+ # Array (0x100E)
+ .short 0xe # Record length
+ .short 0x1503 # Record kind: LF_ARRAY
+ .long 0x1002 # ElementType: volatile char
+ .long 0x23 # IndexType: unsigned __int64
+ .short 0xa # SizeOf
+ .byte 0 # Name
+ .byte 241
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