1 files changed, 80 insertions, 0 deletions
diff --git a/lld/test/ELF/linkerscript/sections-keep.s b/lld/test/ELF/linkerscript/sections-keep.s
new file mode 100644
index 00000000000..fae6383ca49
--- /dev/null
+++ b/lld/test/ELF/linkerscript/sections-keep.s
@@ -0,0 +1,80 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
+
+## First check that section "keep" is garbage collected without using KEEP
+# RUN: echo "SECTIONS { \
+# RUN:  .text : { *(.text) } \
+# RUN:  .keep : { *(.keep) } \
+# RUN:  .temp : { *(.temp) }}" > %t.script
+# RUN: ld.lld --gc-sections -o %t1 --script %t.script %t
+# RUN: llvm-objdump -section-headers %t1 | \
+# RUN:   FileCheck -check-prefix=SECGC %s
+# SECGC:      Sections:
+# SECGC-NEXT: Idx Name          Size      Address          Type
+# SECGC-NEXT:   0               00000000 0000000000000000
+# SECGC-NEXT:   1 .text         00000007 0000000000000158 TEXT DATA
+# SECGC-NEXT:   2 .temp         00000004 000000000000015f DATA
+
+## Now apply KEEP command to preserve the section.
+# RUN: echo "SECTIONS { \
+# RUN:  .text : { *(.text) } \
+# RUN:  .keep : { KEEP(*(.keep)) } \
+# RUN:  .temp : { *(.temp) }}" > %t.script
+# RUN: ld.lld --gc-sections -o %t1 --script %t.script %t
+# RUN: llvm-objdump -section-headers %t1 | \
+# RUN:   FileCheck -check-prefix=SECNOGC %s
+# SECNOGC:      Sections:
+# SECNOGC-NEXT: Idx Name          Size      Address          Type
+# SECNOGC-NEXT:   0               00000000 0000000000000000
+# SECNOGC-NEXT:   1 .text         00000007 0000000000000158 TEXT DATA
+# SECNOGC-NEXT:   2 .keep         00000004 000000000000015f DATA
+# SECNOGC-NEXT:   3 .temp         00000004 0000000000000163 DATA
+
+## A section name matches two entries in the SECTIONS directive. The
+## first one doesn't have KEEP, the second one does. If section that have
+## KEEP is the first in order then section is NOT collected.
+# RUN: echo "SECTIONS { \
+# RUN:  .keep : { KEEP(*(.keep)) } \
+# RUN:  .nokeep : { *(.keep) }}" > %t.script
+# RUN: ld.lld --gc-sections -o %t1 --script %t.script %t
+# RUN: llvm-objdump -section-headers %t1 | FileCheck -check-prefix=MIXED1 %s
+# MIXED1:      Sections:
+# MIXED1-NEXT: Idx Name          Size      Address         Type
+# MIXED1-NEXT:   0               00000000 0000000000000000
+# MIXED1-NEXT:   1 .keep         00000004 0000000000000120 DATA
+# MIXED1-NEXT:   2 .temp         00000004 0000000000000124 DATA
+# MIXED1-NEXT:   3 .text         00000007 0000000000000128 TEXT DATA
+# MIXED1-NEXT:   4 .symtab       00000060 0000000000000000
+# MIXED1-NEXT:   5 .shstrtab     0000002d 0000000000000000
+# MIXED1-NEXT:   6 .strtab       00000012 0000000000000000
+
+## The same, but now section without KEEP is at first place.
+## gold and bfd linkers disagree here. gold collects .keep while
+## bfd keeps it. Our current behavior is compatible with bfd although
+## we can choose either way.
+# RUN: echo "SECTIONS { \
+# RUN:  .nokeep : { *(.keep) } \
+# RUN:  .keep : { KEEP(*(.keep)) }}" > %t.script
+# RUN: ld.lld --gc-sections -o %t1 --script %t.script %t
+# RUN: llvm-objdump -section-headers %t1 | FileCheck -check-prefix=MIXED2 %s
+# MIXED2:      Sections:
+# MIXED2-NEXT: Idx Name          Size      Address         Type
+# MIXED2-NEXT:   0               00000000 0000000000000000
+# MIXED2-NEXT:   1 .nokeep       00000004 0000000000000120 DATA
+# MIXED2-NEXT:   2 .temp         00000004 0000000000000124 DATA
+# MIXED2-NEXT:   3 .text         00000007 0000000000000128 TEXT DATA
+# MIXED2-NEXT:   4 .symtab       00000060 0000000000000000
+# MIXED2-NEXT:   5 .shstrtab     0000002f 0000000000000000
+# MIXED2-NEXT:   6 .strtab       00000012 0000000000000000
+
+.global _start
+_start:
+ mov temp, %eax
+
+.section .keep, "a"
+keep:
+ .long 1
+
+.section .temp, "a"
+temp:
+ .long 2