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llvm-project/lld/test/COFF/symtab-gc.s

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[COFF] Fix crash when emitting symbol tables with GC When running with linker GC (`-opt:ref`), defined imported symbols that are referenced but then dropped by GC end up with their `Location` member being nullptr, which means `getChunk()` returns nullptr for them and attempting to call `getChunk()->getOutputSection()` causes a crash from the nullptr dereference. Check for `getChunk()` being nullptr and bail out early to avoid the crash. Differential Revision: https://reviews.llvm.org/D48092 llvm-svn: 334548
2018-06-13 05:19:33 +08:00
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-windows-msvc -o %tobject.obj %S/Inputs/object.s
# RUN: lld-link -dll -entry:f -out:%t.dll -implib:%t.lib %tobject.obj
# RUN: llvm-mc -filetype=obj -triple=x86_64-windows-msvc -o %tmain.obj %s
# RUN: lld-link -entry:main -out:%t.exe -opt:ref -debug:dwarf %tmain.obj %t.lib
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
# RUN: llvm-readobj --coff-imports %t.exe | FileCheck %s
[COFF] Fix crash when emitting symbol tables with GC When running with linker GC (`-opt:ref`), defined imported symbols that are referenced but then dropped by GC end up with their `Location` member being nullptr, which means `getChunk()` returns nullptr for them and attempting to call `getChunk()->getOutputSection()` causes a crash from the nullptr dereference. Check for `getChunk()` being nullptr and bail out early to avoid the crash. Differential Revision: https://reviews.llvm.org/D48092 llvm-svn: 334548
2018-06-13 05:19:33 +08:00
# CHECK-NOT: Symbol: f
.def main;
.scl 2;
.type 32;
.endef
.section .text,"xr",one_only,main
.globl main
main:
retq
.def stripped;
.scl 3;
.type 32;
.endef
.section .text,"xr",one_only,stripped
stripped:
callq __imp_f
retq