# Test that landing pads at fragment entries are not omitted during unwinding. # This uses profile2 splitting with a fake fdata, so SplitFunctions splits main # right before landing pad. # RUN: llvm-mc --filetype=obj --triple x86_64-unknown-unknown %s -o %t.o # RUN: link_fdata %s %t.o %t.fdata # RUN: llvm-strip --strip-unneeded %t.o # RUN: %clang++ %cflags %t.o -o %t.exe -Wl,-q # RUN: llvm-bolt %t.exe -o %t.bolt --split-functions --data=%t.fdata \ # RUN: --print-split --print-only=main --split-eh --split-all-cold \ # RUN: 2>&1 | FileCheck --check-prefix=BOLT-CHECK %s # RUN: %t.bolt | FileCheck --check-prefix=RUN-CHECK %s # BOLT-CHECK: ------- HOT-COLD SPLIT POINT ------- # BOLT-CHECK-EMPTY: # BOLT-CHECK-NEXT: .LLP1 # RUN-CHECK: failed successfully .text .file "lp-fragment-start.cpp" .globl main # -- Begin function main .p2align 4, 0x90 .type main,@function main: # @main .Lfunc_begin0: .cfi_startproc .cfi_personality 155, DW.ref.__gxx_personality_v0 .cfi_lsda 27, .Lexception0 pushq %r15 .cfi_def_cfa_offset 16 pushq %r14 .cfi_def_cfa_offset 24 pushq %rbx .cfi_def_cfa_offset 32 .cfi_offset %rbx, -32 .cfi_offset %r14, -24 .cfi_offset %r15, -16 movl $16, %edi LL_fdata0: callq __cxa_allocate_exception@PLT # FDATA: 1 main #LL_fdata0# 1 __cxa_allocate_exception@PLT 0 0 1 movq %rax, %rbx .Ltmp0: leaq .L.str(%rip), %rsi movq %rax, %rdi callq _ZNSt13runtime_errorC1EPKc@PLT jmp .Ltmp3 .Ltmp1: # Cause split here, so .Ltmp5 is the first block of the fragment .Ltmp5: # LP for .Ltmp3 to .Ltmp4 movq %rdx, %r15 movq %rax, %r14 jmp .LBB0_4 .Ltmp3: # throw std::runtime_error movq _ZTISt13runtime_error@GOTPCREL(%rip), %rsi movq _ZNSt13runtime_errorD1Ev@GOTPCREL(%rip), %rdx movq %rbx, %rdi callq __cxa_throw@PLT # LP: .Ltmp5 .Ltmp4: .Ltmp2: movq %rdx, %r15 movq %rax, %r14 movq %rbx, %rdi callq __cxa_free_exception@PLT .LBB0_4: movq %r14, %rdi cmpl $1, %r15d jne .LBB0_5 callq __cxa_begin_catch@PLT movq (%rax), %rcx movq %rax, %rdi callq *16(%rcx) movq %rax, %rdi callq puts@PLT callq __cxa_end_catch@PLT xorl %eax, %eax popq %rbx .cfi_def_cfa_offset 24 popq %r14 .cfi_def_cfa_offset 16 popq %r15 .cfi_def_cfa_offset 8 retq .LBB0_5: .cfi_def_cfa_offset 32 callq _Unwind_Resume@PLT .Lfunc_end0: .size main, .Lfunc_end0-main .cfi_endproc .section .gcc_except_table,"a",@progbits .p2align 2 GCC_except_table0: .Lexception0: .byte 255 # @LPStart Encoding = omit .byte 155 # @TType Encoding = indirect pcrel sdata4 .uleb128 .Lttbase0-.Lttbaseref0 .Lttbaseref0: .byte 1 # Call site Encoding = uleb128 .uleb128 .Lcst_end0-.Lcst_begin0 .Lcst_begin0: .uleb128 .Lfunc_begin0-.Lfunc_begin0 # >> Call Site 1 << .uleb128 .Ltmp0-.Lfunc_begin0 # Call between .Lfunc_begin0 and .Ltmp0 .byte 0 # has no landing pad .byte 0 # On action: cleanup .uleb128 .Ltmp0-.Lfunc_begin0 # >> Call Site 2 << .uleb128 .Ltmp1-.Ltmp0 # Call between .Ltmp0 and .Ltmp1 .uleb128 .Ltmp2-.Lfunc_begin0 # jumps to .Ltmp2 .byte 3 # On action: 2 .uleb128 .Ltmp3-.Lfunc_begin0 # >> Call Site 3 << .uleb128 .Ltmp4-.Ltmp3 # Call between .Ltmp3 and .Ltmp4 .uleb128 .Ltmp5-.Lfunc_begin0 # jumps to .Ltmp5 .byte 5 # On action: 3 .uleb128 .Ltmp4-.Lfunc_begin0 # >> Call Site 4 << .uleb128 .Lfunc_end0-.Ltmp4 # Call between .Ltmp4 and .Lfunc_end0 .byte 0 # has no landing pad .byte 0 # On action: cleanup .Lcst_end0: .byte 0 # >> Action Record 1 << .byte 0 # No further actions .byte 1 # >> Action Record 2 << .byte 125 # Continue to action 1 .byte 1 # >> Action Record 3 << .byte 0 # No further actions .p2align 2 .Ltmp6: # TypeInfo 1 .long .L_ZTISt13runtime_error.DW.stub-.Ltmp6 .Lttbase0: .p2align 2 .type .L.str,@object # @.str .section .rodata.str1.1,"aMS",@progbits,1 .L.str: .asciz "failed successfully" .size .L.str, 20 .data .p2align 3 .L_ZTISt13runtime_error.DW.stub: .quad _ZTISt13runtime_error .hidden DW.ref.__gxx_personality_v0 .weak DW.ref.__gxx_personality_v0 .section .data.DW.ref.__gxx_personality_v0,"aGw",@progbits,DW.ref.__gxx_personality_v0,comdat .p2align 3 .type DW.ref.__gxx_personality_v0,@object .size DW.ref.__gxx_personality_v0, 8 DW.ref.__gxx_personality_v0: .quad __gxx_personality_v0 .ident "clang version 14.0.0 (https://github.com/llvm/llvm-project.git 329fda39c507e8740978d10458451dcdb21563be)" .section ".note.GNU-stack","",@progbits .addrsig .addrsig_sym __gxx_personality_v0 .addrsig_sym _Unwind_Resume .addrsig_sym _ZTISt13runtime_error # #include # #include # # int main() { # try { # throw std::runtime_error("failed successfully"); # } catch (const std::runtime_error &e) { # puts(e.what()); # } # return 0; # }