e63de82d90
This is a workaround for https://github.com/llvm/llvm-project/issues/82050 by skipping the `DllMain` symbol if seen in aimport library. If this situation occurs, after this commit a warning will also be displayed. The warning can be silenced with `/ignore:exporteddllmain`
58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
REQUIRES: x86
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RUN: split-file %s %t.dir && cd %t.dir
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RUN: llvm-mc -filetype=obj -triple=x86_64-windows a.s -o a.obj
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RUN: llvm-mc -filetype=obj -triple=x86_64-windows b1.s -o b1.obj
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RUN: llvm-mc -filetype=obj -triple=x86_64-windows b2.s -o b2.obj
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### This is the line where our problem occurs. Here, we export the DllMain symbol which shouldn't happen normally.
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RUN: lld-link b1.obj b2.obj -out:b.dll -dll -implib:b.lib -entry:DllMain -export:bar -export:DllMain
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RUN: llvm-mc -filetype=obj -triple=x86_64-windows c.s -o c.obj
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RUN: lld-link -lib c.obj -out:c.lib
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### Later, if b.lib is provided before other libs/objs that export DllMain statically, we previously were using the dllimported DllMain from b.lib, which is wrong.
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RUN: lld-link a.obj b.lib c.lib -dll -out:out.dll -entry:DllMain 2>&1 | FileCheck -check-prefix=WARN %s
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RUN: lld-link a.obj b.lib c.lib -dll -out:out.dll -entry:DllMain -ignore:exporteddllmain 2>&1 | FileCheck -check-prefix=IGNORED --allow-empty %s
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RUN: llvm-objdump --private-headers -d out.dll | FileCheck -check-prefix=DISASM %s
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WARN: lld-link: warning: b.lib: skipping exported DllMain symbol [exporteddllmain]
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IGNORED-NOT: lld-link: warning: b.lib: skipping exported DllMain symbol [exporteddllmain]
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DISASM: The Import Tables:
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DISASM: DLL Name: b.dll
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DISASM-NOT: DllMain
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DISASM: bar
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DISASM: Disassembly of section .text:
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DISASM-EMPTY:
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DISASM: b8 01 00 00 00 movl $0x1, %eax
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DISASM-NEXT: c3 retq
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#--- a.s
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.text
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.globl foo
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foo:
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call *__imp_bar(%rip)
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ret
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#--- b1.s
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.text
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.globl bar
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bar:
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ret
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#--- b2.s
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.text
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.globl DllMain
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DllMain:
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xor %eax, %eax
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ret
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#--- c.s
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.text
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.globl DllMain
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DllMain:
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movl $1, %eax
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ret
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