7fa57438c4
Test linker-synthesized symbols in addReservedSymbols and in finalizeSections. `isExported` is set in the middle. The hidden symbol test could have caught an assertion failure introduced by 712264b83c736fac7a7f0d4296f84c1afbd93b1a and fixed by 3733ed6f1c6b0eef1e13e175ac81ad309fc0b080.
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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