derek.holloway
7502bf64a4
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117 lines
4.9 KiB
ArmAsm
117 lines
4.9 KiB
ArmAsm
# REQUIRES: x86
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# FIXME: this should be supported on Windows as well. There is a strange issue
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# happening with command line processing though. The command line argument
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# --export-dynamic-symbol 'f*'
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# does not have the single quotes stripped on some Windows targets (but not
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# all). This causes the glob matching to fail, which means the test fails on
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# some Windows bots and passes on others. However, there's no clear indication
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# as to what's changed to cause this behavior. Marking the test as unsupported
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# so that we have time to investigate the issue without losing postcommit CI.
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# UNSUPPORTED: system-windows
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# RUN: rm -rf %t && split-file %s %t && cd %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o %t.o
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## For an executable, --export-dynamic-symbol exports a symbol if it is non-local and defined.
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# RUN: ld.lld -pie --export-dynamic-symbol foo --export-dynamic-symbol qux %t.o -o out
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# RUN: llvm-nm -D -p out | FileCheck %s
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# RUN: echo '{ foo; };' > %t1.list
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# RUN: echo '{ foo; qux; };' > %t2.list
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# RUN: ld.lld -pie --export-dynamic-symbol-list=%t2.list %t.o -o out
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# RUN: llvm-nm -D -p out | FileCheck %s
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## --export-dynamic exports all non-local defined symbols.
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## --export-dynamic-symbol is shadowed.
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# RUN: ld.lld -pie --export-dynamic --export-dynamic-symbol foo %t.o -o %t.start
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# RUN: llvm-nm -D -p %t.start | FileCheck --check-prefixes=CHECK,START %s
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# CHECK-NOT: .
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# START: T _start
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# CHECK: T foo
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# CHECK: T qux
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# CHECK-NOT: .
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## --export-dynamic-symbol does not imply -u: %t1.a(%t1.o) is not fetched.
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## This is compatible with GNU ld since binutils 2.35 onwards.
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# RUN: echo '.globl foo, bar; foo: bar:' | llvm-mc -filetype=obj -triple=x86_64 - -o %t1.o
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# RUN: rm -f %t1.a && llvm-ar rc %t1.a %t1.o
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# RUN: ld.lld --export-dynamic-symbol bar %t1.a %t.o -o %t.nofetch
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# RUN: llvm-nm %t.nofetch | FileCheck /dev/null --implicit-check-not=bar
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## For -shared, if no option expresses a symbolic intention, --export-dynamic-symbol is a no-op.
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# RUN: ld.lld -shared --export-dynamic-symbol foo %t.o -o %t.noop
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# RUN: llvm-objdump -d %t.noop | FileCheck --check-prefix=PLT2 %s
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# RUN: ld.lld -shared --export-dynamic-symbol-list %t2.list %t.o -o %t.noop
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# RUN: llvm-objdump -d %t.noop | FileCheck --check-prefix=PLT2 %s
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## --export-dynamic-symbol can make a symbol preemptible even if it would be otherwise
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## non-preemptible (due to -Bsymbolic, -Bsymbolic-functions or --dynamic-list).
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol nomatch %t.o -o %t.nopreempt
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# RUN: llvm-objdump -d %t.nopreempt | FileCheck --check-prefix=NOPLT %s
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol foo %t.o -o %t.preempt
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# RUN: llvm-objdump -d %t.preempt | FileCheck --check-prefix=PLT1 %s
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol-list %t1.list %t.o -o %t.preempt
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# RUN: llvm-objdump -d %t.preempt | FileCheck --check-prefix=PLT1 %s
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## Hidden symbols cannot be exported by --export-dynamic-symbol family options.
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# RUN: llvm-mc -filetype=obj -triple=x86_64 hidden.s -o hidden.o
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# RUN: ld.lld -pie %t.o hidden.o --dynamic-list hidden.list -o out.hidden
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# RUN: llvm-readelf -s out.hidden | FileCheck %s --check-prefix=HIDDEN
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# HIDDEN: '.dynsym' contains 2 entries:
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# HIDDEN: NOTYPE GLOBAL DEFAULT [[#]] _end
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# HIDDEN: '.symtab' contains 6 entries:
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# HIDDEN: FUNC LOCAL HIDDEN [[#]] foo
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# HIDDEN-NEXT: NOTYPE LOCAL HIDDEN [[#]] _DYNAMIC
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# HIDDEN-NEXT: NOTYPE GLOBAL DEFAULT [[#]] _start
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# HIDDEN-NEXT: FUNC GLOBAL DEFAULT [[#]] qux
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# HIDDEN-NEXT: NOTYPE GLOBAL DEFAULT [[#]] _end
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## 'nomatch' does not match any symbol. Don't warn.
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# RUN: ld.lld --fatal-warnings -shared -Bsymbolic-functions --export-dynamic-symbol nomatch %t.o -o %t.nopreempt2
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# RUN: llvm-objdump -d %t.nopreempt2 | FileCheck --check-prefix=NOPLT %s
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# RUN: ld.lld -shared -Bsymbolic-functions --export-dynamic-symbol foo %t.o -o %t.preempt2
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# RUN: llvm-objdump -d %t.preempt2 | FileCheck --check-prefix=PLT1 %s
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# RUN: echo '{};' > %t.list
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# RUN: ld.lld -shared --dynamic-list %t.list --export-dynamic-symbol foo %t.o -o %t.preempt3
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# RUN: llvm-objdump -d %t.preempt3 | FileCheck --check-prefix=PLT1 %s
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## The option value is a glob.
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol 'f*' %t.o -o - | \
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# RUN: llvm-objdump -d - | FileCheck --check-prefix=PLT1 %s
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol '[f]o[o]' %t.o -o - | \
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# RUN: llvm-objdump -d - | FileCheck --check-prefix=PLT1 %s
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# RUN: ld.lld -shared -Bsymbolic --export-dynamic-symbol 'f?o' %t.o -o - | \
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# RUN: llvm-objdump -d - | FileCheck --check-prefix=PLT1 %s
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# PLT1: <foo@plt>
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# PLT1: <qux>
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# PLT2: <foo@plt>
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# PLT2: <qux@plt>
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# NOPLT-NOT: <foo@plt>
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# NOPLT-NOT: <qux@plt>
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#--- a.s
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.global _start, foo, qux
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.type foo, @function
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.type qux, @function
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_start:
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call foo
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call qux
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foo:
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qux:
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#--- hidden.s
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.hidden foo
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.data
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.quad _DYNAMIC
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.quad _end
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#--- hidden.list
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{foo;_end;_DYNAMIC;};
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