[llvm-strip] Support stripping multiple input files

Summary:
Allow strip to be called on multiple input files, which is interpreted as stripping N files in place. Using multiple input files is incompatible with -o.

To allow this, create a `DriverConfig` struct which just wraps a list of `CopyConfigs`. objcopy will only ever have a single `CopyConfig`, but strip will have N (where N >= 1) CopyConfigs.

Reviewers: alexshap, jakehehrlich

Reviewed By: alexshap, jakehehrlich

Subscribers: MaskRay, jakehehrlich, llvm-commits

Differential Revision: https://reviews.llvm.org/D51660

llvm-svn: 341464

1 files changed, 75 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-objcopy/strip-multiple-files.test b/llvm/test/tools/llvm-objcopy/strip-multiple-files.test
new file mode 100644
index 00000000000..d1496eb5220
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/strip-multiple-files.test
@@ -0,0 +1,75 @@
+# RUN: yaml2obj %s > %t.o
+
+# Run llvm-strip normally. This will create a stripped object file for later
+# tests so we only have to run FileCheck on it once.
+# RUN: cp %t.o %t.1.o
+# RUN: llvm-strip --keep-symbol=foo %t.1.o -o %t.stripped.o
+# RUN: llvm-readobj -symbols %t.stripped.o | FileCheck %s
+
+# llvm-strip on two files:
+# RUN: cp %t.o %t.1.o
+# RUN: cp %t.o %t.2.o
+# RUN: llvm-strip --keep-symbol=foo %t.1.o %t.2.o
+# RUN: cmp %t.1.o %t.stripped.o
+# RUN: cmp %t.2.o %t.stripped.o
+
+# llvm-strip on three files:
+# RUN: cp %t.o %t.1.o
+# RUN: cp %t.o %t.2.o
+# RUN: cp %t.o %t.3.o
+# RUN: llvm-strip --keep-symbol=foo %t.1.o %t.2.o %t.3.o
+# RUN: cmp %t.1.o %t.stripped.o
+# RUN: cmp %t.2.o %t.stripped.o
+# RUN: cmp %t.3.o %t.stripped.o
+
+# -o cannot be used with multiple input files
+# RUN: cp %t.o %t.1.o
+# RUN: cp %t.o %t.2.o
+# RUN: not llvm-strip --keep-symbol=foo -o %t.stripped.o %t.1.o %t.2.o 2>&1 \
+# RUN:   | FileCheck %s --check-prefix=BAD-O-FLAG
+
+!ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_REL
+  Machine:         EM_X86_64
+Sections:
+  - Name:            .text
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
+Symbols:
+  Local:
+    - Name:     foo
+      Type:     STT_FUNC
+      Section:  .text
+      Value:    0x1234
+      Size:     8
+    - Name:     bar
+      Type:     STT_FUNC
+      Section:  .text
+      Value:    0x5678
+      Size:     8
+
+# CHECK:      Symbols [
+# CHECK-NEXT:   Symbol {
+# CHECK-NEXT:     Name:
+# CHECK-NEXT:     Value: 0x0
+# CHECK-NEXT:     Size: 0
+# CHECK-NEXT:     Binding: Local
+# CHECK-NEXT:     Type: None
+# CHECK-NEXT:     Other: 0
+# CHECK-NEXT:     Section: Undefined
+# CHECK-NEXT:   }
+# CHECK-NEXT:   Symbol {
+# CHECK-NEXT:     Name: foo
+# CHECK-NEXT:     Value: 0x1234
+# CHECK-NEXT:     Size: 8
+# CHECK-NEXT:     Binding: Local
+# CHECK-NEXT:     Type: Function
+# CHECK-NEXT:     Other: 0
+# CHECK-NEXT:     Section: .text
+# CHECK-NEXT:   }
+# CHECK-NEXT: ]
+
+# BAD-O-FLAG: Multiple input files cannot be used in combination with -o.