diff --git a/bolt/include/bolt/Core/DebugData.h b/bolt/include/bolt/Core/DebugData.h --- a/bolt/include/bolt/Core/DebugData.h +++ b/bolt/include/bolt/Core/DebugData.h @@ -490,6 +490,7 @@ PatchBaseClass, PatchValue32, PatchValue64to32, + PatchValue32GenericSize, PatchValue64, PatchValueVariable, ReferencePatchValue, @@ -536,6 +537,22 @@ uint32_t Value; }; + /// Patch for 4 byte entry, where original entry size is not 4 bytes or 8 + /// bytes. + struct DebugPatch32GenericSize : public Patch { + DebugPatch32GenericSize(uint32_t O, uint32_t V, uint32_t OVS) + : Patch(O, DebugPatchKind::PatchValue32GenericSize) { + Value = V; + OldValueSize = OVS; + } + + static bool classof(const Patch *Writer) { + return Writer->getKind() == DebugPatchKind::PatchValue32GenericSize; + } + uint32_t Value; + uint32_t OldValueSize; + }; + struct DebugPatch64 : public Patch { DebugPatch64(uint32_t O, uint64_t V) : Patch(O, DebugPatchKind::PatchValue64) { @@ -693,6 +710,9 @@ case DebugPatchKind::PatchValue64to32: delete reinterpret_cast(P); break; + case DebugPatchKind::PatchValue32GenericSize: + delete reinterpret_cast(P); + break; case DebugPatchKind::PatchValue64: delete reinterpret_cast(P); break; diff --git a/bolt/lib/Core/DebugData.cpp b/bolt/lib/Core/DebugData.cpp --- a/bolt/lib/Core/DebugData.cpp +++ b/bolt/lib/Core/DebugData.cpp @@ -486,8 +486,11 @@ std::lock_guard Lock(WriterMutex); if (OldValueSize == 4) DebugPatches.emplace_back(new DebugPatch32(Offset, NewValue)); - else + else if (OldValueSize == 8) DebugPatches.emplace_back(new DebugPatch64to32(Offset, NewValue)); + else + DebugPatches.emplace_back( + new DebugPatch32GenericSize(Offset, NewValue, OldValueSize)); } void SimpleBinaryPatcher::addBinaryPatch(uint64_t Offset, @@ -578,6 +581,12 @@ PreviousChangeInSize -= 4; break; } + case DebugPatchKind::PatchValue32GenericSize: { + DebugPatch32GenericSize *DPVS = + reinterpret_cast(P); + PreviousChangeInSize += 4 - DPVS->OldValueSize; + break; + } case DebugPatchKind::PatchValueVariable: { DebugPatchVariableSize *DPV = reinterpret_cast(P); @@ -691,6 +700,14 @@ ByteSequence = encodeLE(4, P64to32->Value); break; } + case DebugPatchKind::PatchValue32GenericSize: { + DebugPatch32GenericSize *DPVS = + reinterpret_cast(P); + Offset = DPVS->Offset; + OldValueSize = DPVS->OldValueSize; + ByteSequence = encodeLE(4, DPVS->Value); + break; + } case DebugPatchKind::PatchValueVariable: { DebugPatchVariableSize *PV = reinterpret_cast(P); diff --git a/bolt/test/X86/high_pc_udata.s b/bolt/test/X86/high_pc_udata.s new file mode 100644 --- /dev/null +++ b/bolt/test/X86/high_pc_udata.s @@ -0,0 +1,150 @@ +# REQUIRES: system-linux + +# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-linux %s -o %t1.o +# RUN: %clang %cflags %t1.o -o %t.exe -Wl,-q +# RUN: llvm-bolt %t.exe -o %t.bolt -update-debug-sections +# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.exe | FileCheck --check-prefix=PRECHECK %s +# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=POSTCHECK %s + +# PRECHECK: DW_AT_high_pc [DW_FORM_udata] (15) +# PRECHECK-NEXT: DW_AT_name [DW_FORM_strp] +# PRECHECK-SAME: "main.cpp" + +# POSTCHECK: DW_AT_ranges [DW_FORM_sec_offset] +# POSTCHECK-NEXT: [ +# POSTCHECK-NEXT: DW_AT_name [DW_FORM_strp] +# POSTCHECK-SAME: "main.cpp" + +# Testing that BOLT transforms DW_AT_high_pc of form DW_FORM_udata correctly into DW_AT_ranges. +# Manually changed so that DW_AT_high_pc is DW_FORM_udata, and that DW_AT_name is after it. +# int main() { +# return 0; +# } +.text + .file "main.cpp" + .globl main # -- Begin function main + .p2align 4, 0x90 + .type main,@function +main: # @main +.Lfunc_begin0: + .file 1 "" "main.cpp" + .loc 1 1 0 # main.cpp:1:0 + .cfi_startproc +# %bb.0: # %entry + pushq %rbp + .cfi_def_cfa_offset 16 + .cfi_offset %rbp, -16 + movq %rsp, %rbp + .cfi_def_cfa_register %rbp + movl $0, -4(%rbp) +.Ltmp0: + .loc 1 2 1 prologue_end # main.cpp:2:1 + xorl %eax, %eax + popq %rbp + .cfi_def_cfa %rsp, 8 + retq +.Ltmp1: +.Lfunc_end0: + .size main, .Lfunc_end0-main + .cfi_endproc + # -- End function + .section .debug_abbrev,"",@progbits + .byte 1 # Abbreviation Code + .byte 17 # DW_TAG_compile_unit + .byte 1 # DW_CHILDREN_yes + .byte 37 # DW_AT_producer + .byte 14 # DW_FORM_strp + .byte 19 # DW_AT_language + .byte 5 # DW_FORM_data2 + .byte 16 # DW_AT_stmt_list + .byte 23 # DW_FORM_sec_offset + .byte 27 # DW_AT_comp_dir + .byte 14 # DW_FORM_strp + .byte 17 # DW_AT_low_pc + .byte 1 # DW_FORM_addr + .byte 18 # DW_AT_high_pc + .byte 15 # DW_FORM_udata + .byte 3 # DW_AT_name + .byte 14 # DW_FORM_strp + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 2 # Abbreviation Code + .byte 46 # DW_TAG_subprogram + .byte 0 # DW_CHILDREN_no + .byte 17 # DW_AT_low_pc + .byte 1 # DW_FORM_addr + .byte 18 # DW_AT_high_pc + .byte 6 # DW_FORM_data4 + .byte 64 # DW_AT_frame_base + .byte 24 # DW_FORM_exprloc + .byte 3 # DW_AT_name + .byte 14 # DW_FORM_strp + .byte 58 # DW_AT_decl_file + .byte 11 # DW_FORM_data1 + .byte 59 # DW_AT_decl_line + .byte 11 # DW_FORM_data1 + .byte 73 # DW_AT_type + .byte 19 # DW_FORM_ref4 + .byte 63 # DW_AT_external + .byte 25 # DW_FORM_flag_present + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 3 # Abbreviation Code + .byte 36 # DW_TAG_base_type + .byte 0 # DW_CHILDREN_no + .byte 3 # DW_AT_name + .byte 14 # DW_FORM_strp + .byte 62 # DW_AT_encoding + .byte 11 # DW_FORM_data1 + .byte 11 # DW_AT_byte_size + .byte 11 # DW_FORM_data1 + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 0 # EOM(3) + .section .debug_info,"",@progbits +.Lcu_begin0: + .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit +.Ldebug_info_start0: + .short 4 # DWARF version number + .long .debug_abbrev # Offset Into Abbrev. Section + .byte 8 # Address Size (in bytes) + .byte 1 # Abbrev [1] 0xb:0x40 DW_TAG_compile_unit + .long .Linfo_string0 # DW_AT_producer + .short 33 # DW_AT_language + .long .Lline_table_start0 # DW_AT_stmt_list + .long .Linfo_string2 # DW_AT_comp_dir + .quad .Lfunc_begin0 # DW_AT_low_pc + .byte .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc + .long .Linfo_string1 # DW_AT_name + .byte 2 # Abbrev [2] 0x2a:0x19 DW_TAG_subprogram + .quad .Lfunc_begin0 # DW_AT_low_pc + .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc + .byte 1 # DW_AT_frame_base + .byte 86 + .long .Linfo_string3 # DW_AT_name + .byte 1 # DW_AT_decl_file + .byte 1 # DW_AT_decl_line + .long 67 # DW_AT_type + # DW_AT_external + .byte 3 # Abbrev [3] 0x43:0x7 DW_TAG_base_type + .long .Linfo_string4 # DW_AT_name + .byte 5 # DW_AT_encoding + .byte 4 # DW_AT_byte_size + .byte 0 # End Of Children Mark +.Ldebug_info_end0: + .section .debug_str,"MS",@progbits,1 +.Linfo_string0: + .asciz "clang" # string offset=0 +.Linfo_string1: + .asciz "main.cpp" # string offset=134 +.Linfo_string2: + .asciz "test" # string offset=143 +.Linfo_string3: + .asciz "main" # string offset=186 +.Linfo_string4: + .asciz "int" # string offset=191 + .ident "clang" + .section ".note.GNU-stack","",@progbits + .addrsig + .section .debug_line,"",@progbits +.Lline_table_start0: