derek.holloway
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76 lines
3.0 KiB
Plaintext
76 lines
3.0 KiB
Plaintext
## Test that perf2bolt correctly detects shared objects using identify_magic
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## and activates build ID filtering for pre-aggregated profiles.
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# REQUIRES: system-linux
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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 %t.o -o %t.so -shared -Wl,-q -Wl,--build-id=0xaabb1122 -nostdlib
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# RUN: %clang %cflags %t.o -o %t.exe -fPIC -pie -Wl,-q -Wl,--build-id=0xaabb1122 -nostdlib
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# RUN: link_fdata %s %t.so %t.pa PREAGG
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# RUN: link_fdata %s %t.exe %t.pa-pie PREAGG
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# RUN: link_fdata %s %t.so %t.pa-bid PREAGG-BID
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## Test 1: Without buildid prefix, addresses don't match the .so's buildid
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## and are treated as external → 0 functions with profile.
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# RUN: perf2bolt %t.so -o %t.fdata --pa -p %t.pa \
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# RUN: --profile-format=fdata 2>&1 | FileCheck %s --check-prefix=CHECK-NEG
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# CHECK-NEG: PERF2BOLT: filtering pre-aggregated data for buildid aabb1122
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# CHECK-NEG: BOLT-INFO: 0 out of {{[0-9]+}} functions in the binary (0.0%) have non-empty execution profile
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## Test 2: With matching buildid prefix, addresses are recognized.
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# RUN: perf2bolt %t.so -o %t.fdata2 --pa -p %t.pa-bid \
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# RUN: --profile-format=fdata 2>&1 | FileCheck %s --check-prefix=CHECK-POS
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# CHECK-POS: PERF2BOLT: filtering pre-aggregated data for buildid aabb1122
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# CHECK-POS: BOLT-INFO: 1 out of {{[0-9]+}} functions in the binary
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# CHECK-POS-NOT: (0.0%)
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.text
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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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cmpl $0, %edi
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Lbr:
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je Lfalse
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Ltrue:
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movl $1, %eax
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jmp Lret
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Lfalse:
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xorl %eax, %eax
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Lret:
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popq %rbp
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retq
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.size foo, .-foo
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# PREAGG: T #Lbr# #Lfalse# #Lret# 10
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# PREAGG-BID: T aabb1122:#Lbr# aabb1122:#Lfalse# aabb1122:#Lret# 10
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## Test 3: Executable with ".so" in the filename should NOT trigger filtering.
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## The old heuristic (ends_with(".so")) would false-positive here, but
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## identify_magic correctly identifies it as an executable.
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# RUN: yaml2obj %p/Inputs/blarge.yaml &> %t.exe.so
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# RUN: perf2bolt %t.exe.so -o %t.fdata3 --pa -p %p/Inputs/pre-aggregated.txt \
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# RUN: --profile-format=fdata 2>&1 | FileCheck %s --check-prefix=CHECK-EXE
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# CHECK-EXE-NOT: filtering pre-aggregated data for buildid
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# CHECK-EXE: BOLT-INFO: 4 out of 7 functions in the binary (57.1%) have non-empty execution profile
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## Test 4: Shared library without ".so" in the filename should still trigger
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## filtering. The old heuristic would false-negative here, but identify_magic
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## correctly identifies it as a shared object.
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# RUN: cp %t.so %t.dynlib
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# RUN: perf2bolt %t.dynlib -o %t.fdata4 --pa -p %t.pa-bid \
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# RUN: --profile-format=fdata 2>&1 | FileCheck %s --check-prefix=CHECK-NOEXT
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# CHECK-NOEXT: PERF2BOLT: filtering pre-aggregated data for buildid aabb1122
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# CHECK-NOEXT: BOLT-INFO: 1 out of {{[0-9]+}} functions in the binary
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# CHECK-NOEXT-NOT: (0.0%)
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#
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## Test 5: Check that PIE binaries are not misidentified as shared libraries.
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# RUN: perf2bolt %t.exe -o %t.fdata5 --pa -p %t.pa-pie 2>&1 | FileCheck %s \
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# RUN: --check-prefix=CHECK-PIE
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# CHECK-PIE: BOLT-INFO: 1 out of {{[0-9]+}} functions in the binary
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