derek.holloway
7502bf64a4
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56 lines
1.5 KiB
ArmAsm
56 lines
1.5 KiB
ArmAsm
# This reproduces a bug with instrumentation when trying to instrument
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# a function with only tail calls. Such functions can clobber red zone,
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# see https://github.com/llvm/llvm-project/issues/61114.
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# REQUIRES: system-linux,bolt-runtime
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# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
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# RUN: %clang %cflags -no-pie %t.o -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe --instrument --instrumentation-file=%t.fdata \
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# RUN: -o %t.instrumented
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# RUN: %t.instrumented arg1 arg2
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# RUN: llvm-objdump %t.instrumented --disassemble-symbols=main | FileCheck %s
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# CHECK: leaq 0x80(%rsp), %rsp
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# RUN: FileCheck %s --input-file %t.fdata --check-prefix=CHECK-FDATA
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# CHECK-FDATA: 1 main {{.*}} 1 targetFunc 0 0 1
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.text
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.globl main
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.type main, %function
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.p2align 4
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main:
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pushq %rbp
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movq %rsp, %rbp
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mov %rax,-0x10(%rsp)
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leaq targetFunc, %rax
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pushq %rax # We save the target function address in the stack
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subq $0x18, %rsp # Set up a dummy stack frame
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cmpl $0x2, %edi
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jb .LBBerror # Add control flow so we don't have a trivial case
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.LBB2:
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addq $0x20, %rsp
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movq %rbp, %rsp
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pop %rbp
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mov -0x10(%rsp),%rax
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test %rsp, %rsp
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jne targetFunc
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.LBBerror:
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addq $0x20, %rsp
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movq %rbp, %rsp
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pop %rbp
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movq $1, %rax # Finish with an error if we go this path
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retq
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.size main, .-main
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.globl targetFunc
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.type targetFunc, %function
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.p2align 4
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targetFunc:
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xorq %rax, %rax
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retq
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.size targetFunc, .-targetFunc
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