1# This reproduces a bug with instrumentation when trying to instrument 2# a function with only tail calls. Such functions can clobber red zone, 3# see https://github.com/llvm/llvm-project/issues/61114. 4 5# REQUIRES: system-linux,bolt-runtime 6 7# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o 8# RUN: %clang %cflags -no-pie %t.o -o %t.exe -Wl,-q 9 10# RUN: llvm-bolt %t.exe --instrument --instrumentation-file=%t.fdata \ 11# RUN: -o %t.instrumented 12# RUN: %t.instrumented arg1 arg2 13# RUN: llvm-objdump %t.instrumented --disassemble-symbols=main | FileCheck %s 14 15# CHECK: leaq 0x80(%rsp), %rsp 16 17# RUN: FileCheck %s --input-file %t.fdata --check-prefix=CHECK-FDATA 18# CHECK-FDATA: 1 main {{.*}} 1 targetFunc 0 0 1 19 20 .text 21 .globl main 22 .type main, %function 23 .p2align 4 24main: 25 pushq %rbp 26 movq %rsp, %rbp 27 mov %rax,-0x10(%rsp) 28 leaq targetFunc, %rax 29 pushq %rax # We save the target function address in the stack 30 subq $0x18, %rsp # Set up a dummy stack frame 31 cmpl $0x2, %edi 32 jb .LBBerror # Add control flow so we don't have a trivial case 33.LBB2: 34 addq $0x20, %rsp 35 movq %rbp, %rsp 36 pop %rbp 37 mov -0x10(%rsp),%rax 38 test %rsp, %rsp 39 jne targetFunc 40 41.LBBerror: 42 addq $0x20, %rsp 43 movq %rbp, %rsp 44 pop %rbp 45 movq $1, %rax # Finish with an error if we go this path 46 retq 47 .size main, .-main 48 49 .globl targetFunc 50 .type targetFunc, %function 51 .p2align 4 52targetFunc: 53 xorq %rax, %rax 54 retq 55 .size targetFunc, .-targetFunc 56