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We used to report PLT traces as invalid (mismatching disassembled function contents) because PLT functions are marked as pseudo and ignored, thus missing CFG. However, such traces are not mismatching the function contents. Accept them without attaching the profile. Test Plan: updated callcont-fallthru.s
159 lines
4.8 KiB
ArmAsm
159 lines
4.8 KiB
ArmAsm
## Ensures that a call continuation fallthrough count is set when using
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## pre-aggregated perf data.
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# RUN: %clang %cflags -fpic -shared -xc /dev/null -o %t.so
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## Link against a DSO to ensure PLT entries.
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# RUN: %clangxx %cxxflags %s %t.so -o %t -Wl,-q -nostdlib
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# RUN: link_fdata %s %t %t.pa1 PREAGG1
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# RUN: link_fdata %s %t %t.pa2 PREAGG2
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# RUN: link_fdata %s %t %t.pa3 PREAGG3
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# RUN: link_fdata %s %t %t.pat PREAGGT1
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# RUN: link_fdata %s %t %t.pat2 PREAGGT2
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# RUN: link_fdata %s %t %t.patplt PREAGGPLT
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## Check normal case: fallthrough is not LP or secondary entry.
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# RUN: llvm-strip --strip-unneeded %t -o %t.strip
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# RUN: llvm-objcopy --remove-section=.eh_frame %t.strip %t.noeh
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# RUN: llvm-bolt %t.strip --pa -p %t.pa1 -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s
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## Check that getFallthroughsInTrace correctly handles a trace starting at plt
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## call continuation
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# RUN: llvm-bolt %t.strip --pa -p %t.pa2 -o %t.out2 \
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# RUN: --print-cfg --print-only=main | FileCheck %s --check-prefix=CHECK2
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## Check that we don't treat secondary entry points as call continuation sites.
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# RUN: llvm-bolt %t --pa -p %t.pa3 -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s --check-prefix=CHECK3
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## Check fallthrough to a landing pad case.
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# RUN: llvm-bolt %t.strip --pa -p %t.pa3 -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s --check-prefix=CHECK3
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## Check pre-aggregated traces attach call continuation fallthrough count
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# RUN: llvm-bolt %t.noeh --pa -p %t.pat -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s
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## Check pre-aggregated traces don't attach call continuation fallthrough count
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## to secondary entry point (unstripped)
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# RUN: llvm-bolt %t --pa -p %t.pat2 -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s --check-prefix=CHECK3
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## Check pre-aggregated traces don't attach call continuation fallthrough count
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## to landing pad (stripped, LP)
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# RUN: llvm-bolt %t.strip --pa -p %t.pat2 -o %t.out \
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# RUN: --print-cfg --print-only=main | FileCheck %s --check-prefix=CHECK3
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## Check pre-aggregated traces don't report zero-sized PLT fall-through as
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## invalid trace
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# RUN: llvm-bolt %t.strip --pa -p %t.patplt -o %t.out | FileCheck %s \
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# RUN: --check-prefix=CHECK-PLT
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# CHECK-PLT: traces mismatching disassembled function contents: 0
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.globl foo
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.type foo, %function
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foo:
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pushq %rbp
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movq %rsp, %rbp
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popq %rbp
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Lfoo_ret:
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retq
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.size foo, .-foo
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.globl main
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.type main, %function
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main:
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.Lfunc_begin0:
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.cfi_startproc
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.cfi_personality 155, DW.ref.__gxx_personality_v0
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.cfi_lsda 27, .Lexception0
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pushq %rbp
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movq %rsp, %rbp
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subq $0x20, %rsp
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movl $0x0, -0x4(%rbp)
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movl %edi, -0x8(%rbp)
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movq %rsi, -0x10(%rbp)
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Ltmp0_br:
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callq puts@PLT
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## Check PLT traces are accepted
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# PREAGGPLT: T #Ltmp0_br# #puts@plt# #puts@plt# 3
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## Target is an external-origin call continuation
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# PREAGG1: B X:0 #Ltmp1# 2 0
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# PREAGGT1: T X:0 #Ltmp1# #Ltmp4_br# 2
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# CHECK: callq puts@PLT
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# CHECK-NEXT: count: 2
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Ltmp1:
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movq -0x10(%rbp), %rax
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movq 0x8(%rax), %rdi
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movl %eax, -0x14(%rbp)
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Ltmp4:
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cmpl $0x0, -0x14(%rbp)
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Ltmp4_br:
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je Ltmp0
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# CHECK2: je .Ltmp0
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# CHECK2-NEXT: count: 3
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movl $0xa, -0x18(%rbp)
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callq foo
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## Target is a binary-local call continuation
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# PREAGG1: B #Lfoo_ret# #Ltmp3# 1 0
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# PREAGGT1: T #Lfoo_ret# #Ltmp3# #Ltmp3_br# 1
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# CHECK: callq foo
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# CHECK-NEXT: count: 1
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## PLT call continuation fallthrough spanning the call
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# PREAGG2: F #Ltmp1# #Ltmp3_br# 3
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# CHECK2: callq foo
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# CHECK2-NEXT: count: 3
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## Target is a secondary entry point (unstripped) or a landing pad (stripped)
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# PREAGG3: B X:0 #Ltmp3# 2 0
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# PREAGGT2: T X:0 #Ltmp3# #Ltmp3_br# 2
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# CHECK3: callq foo
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# CHECK3-NEXT: count: 0
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Ltmp3:
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cmpl $0x0, -0x18(%rbp)
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Ltmp3_br:
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jmp Ltmp2
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Ltmp2:
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movl -0x18(%rbp), %eax
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addl $-0x1, %eax
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movl %eax, -0x18(%rbp)
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jmp Ltmp3
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jmp Ltmp4
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jmp Ltmp1
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Ltmp0:
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xorl %eax, %eax
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addq $0x20, %rsp
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popq %rbp
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retq
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.Lfunc_end0:
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.cfi_endproc
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.size main, .-main
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.section .gcc_except_table,"a",@progbits
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.p2align 2, 0x0
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GCC_except_table0:
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.Lexception0:
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.byte 255 # @LPStart Encoding = omit
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.byte 255 # @TType Encoding = omit
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.byte 1 # Call site Encoding = uleb128
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.uleb128 .Lcst_end0-.Lcst_begin0
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.Lcst_begin0:
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.uleb128 .Lfunc_begin0-.Lfunc_begin0 # >> Call Site 1 <<
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.uleb128 .Lfunc_end0-.Lfunc_begin0 # Call between .Lfunc_begin0 and .Lfunc_end0
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.uleb128 Ltmp3-.Lfunc_begin0 # jumps to Ltmp3
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.byte 0 # has no landing pad
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.byte 0 # On action: cleanup
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.Lcst_end0:
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.p2align 2, 0x0
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.hidden DW.ref.__gxx_personality_v0
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.weak DW.ref.__gxx_personality_v0
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.section .data.DW.ref.__gxx_personality_v0,"awG",@progbits,DW.ref.__gxx_personality_v0,comdat
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.p2align 3, 0x0
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.type DW.ref.__gxx_personality_v0,@object
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