[llvm-strip] Add support for -p/--preserve-dates

Summary: [llvm-strip] Preserve access/modification timestamps when -p is used.

Reviewers: jakehehrlich, jhenderson, alexshap

Reviewed By: jhenderson

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D50744

llvm-svn: 339921

1 files changed, 70 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-objcopy/strip-preserve-time.test b/llvm/test/tools/llvm-objcopy/strip-preserve-time.test
new file mode 100644
index 00000000000..d2f50b777eb
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/strip-preserve-time.test
@@ -0,0 +1,70 @@
+# Note: ls -lu prints the accessed timestamp, ls -l prints the modified timestamp
+
+# Preserve dates when stripping to an output file.
+# RUN: yaml2obj %s > %t.1.o
+# RUN: touch -a -t 199505050555.55 %t.1.o
+# RUN: touch -m -t 199705050555.55 %t.1.o
+# RUN: llvm-strip -p %t.1.o -o %t-preserved.1.o
+# RUN: ls -lu %t-preserved.1.o | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t-preserved.1.o | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+
+# Preserve dates available via objcopy interface as well.
+# RUN: yaml2obj %s > %t.2.o
+# RUN: touch -a -t 199505050555.55 %t.2.o
+# RUN: touch -m -t 199705050555.55 %t.2.o
+# RUN: llvm-objcopy -p %t.2.o %t-preserved.2.o
+# RUN: ls -lu %t-preserved.2.o | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t-preserved.2.o | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+
+# Preserve dates when stripping in place.
+# RUN: yaml2obj %s > %t.3.o
+# RUN: touch -a -t 199505050555.55 %t.3.o
+# RUN: touch -m -t 199705050555.55 %t.3.o
+# RUN: llvm-strip -p %t.3.o
+# RUN: ls -lu %t.3.o | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t.3.o | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+
+# Without -p set, don't preserve dates.
+# RUN: yaml2obj %s > %t.4.o
+# RUN: touch -a -t 199505050555.55 %t.4.o
+# RUN: touch -m -t 199705050555.55 %t.4.o
+# RUN: llvm-strip %t.4.o
+# RUN: ls -lu %t.4.o | FileCheck %s --check-prefix=CHECK-NO-PRESERVE-ATIME
+# RUN: ls -l %t.4.o | FileCheck %s --check-prefix=CHECK-NO-PRESERVE-MTIME
+
+# Preserve dates in archives.
+# RUN: yaml2obj %s > %t.5.o
+# RUN: rm -f %t.a
+# RUN: llvm-ar cr %t.a %t.5.o
+# RUN: touch -a -t 199505050555.55 %t.a
+# RUN: touch -m -t 199705050555.55 %t.a
+# RUN: llvm-strip -p %t.a
+# RUN: ls -lu %t.a | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t.a | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+
+# Preserve dates in split DWO files.
+# RUN: cp %p/Inputs/dwarf.dwo %t-input.dwo
+# RUN: touch -a -t 199505050555.55 %t-input.dwo
+# RUN: touch -m -t 199705050555.55 %t-input.dwo
+# RUN: llvm-objcopy -p -split-dwo=%t-dwo %t-input.dwo %t-nondwo
+# RUN: ls -lu %t-dwo | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t-dwo | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+# RUN: ls -lu %t-nondwo | FileCheck %s --check-prefix=CHECK-PRESERVE-ATIME
+# RUN: ls -l %t-nondwo | FileCheck %s --check-prefix=CHECK-PRESERVE-MTIME
+
+# CHECK-PRESERVE-ATIME:        1995
+# CHECK-PRESERVE-MTIME:        1997
+
+# CHECK-NO-PRESERVE-ATIME-NOT: 1995
+# CHECK-NO-PRESERVE-MTIME-NOT: 1997
+
+!ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_REL
+  Machine:         EM_X86_64
+Sections:
+  - Name:            .text
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]