llvm/test/tools/llvm-objcopy/ELF/tail-merged-string-tables.test

## This test shows that when symbol/section names are optimized in the string
## table to share the same entry, due to tail merging, llvm-objcopy operations
## function correctly without corrupting the names of unchanged sections/symbols.

# RUN: yaml2obj %s -o %t.o
## Sanity check that the strings have been pooled.
# RUN: llvm-readobj %t.o --string-dump .strtab --string-dump .shstrtab \
# RUN:   | FileCheck %s --check-prefix=VALIDATE --implicit-check-not='] bar' --implicit-check-not=.blag

# VALIDATE:      String dump of section '.strtab':
# VALIDATE-NEXT: [     1] bazfoobar
# VALIDATE-EMPTY:
# VALIDATE-NEXT: String dump of section '.shstrtab':
# VALIDATE-NEXT: [     1] .blam.blah.blag

## Case 1: Basic copy.
# RUN: llvm-objcopy %t.o %t.copy
# RUN: llvm-readobj --section-headers --symbols %t.copy | FileCheck %s --check-prefix=COPY

# COPY: Sections [
# COPY:   Name: .blam.blah.blag (
# COPY:   Name: .blah.blag (
# COPY:   Name: .blag (
# COPY: Symbols [
# COPY:   Name: bar (
# COPY:   Name: foobar (
# COPY:   Name: bazfoobar (

## Case 2: Rename section.
# RUN: llvm-objcopy %t.o %t.rename-section --rename-section .blah.blag=.blob.blab
# RUN: llvm-readobj --section-headers %t.rename-section \
# RUN:   | FileCheck %s --check-prefix=RENAME-SECTION

# RENAME-SECTION: Sections [
# RENAME-SECTION:   Name: .blam.blah.blag (
# RENAME-SECTION:   Name: .blob.blab (
# RENAME-SECTION:   Name: .blag (

## Case 3: Rename symbol.
# RUN: llvm-objcopy %t.o %t.rename-symbol --redefine-sym foobar=raboof
# RUN: llvm-readobj --symbols %t.rename-symbol \
# RUN:   | FileCheck %s --check-prefix=RENAME-SYMBOL

# RENAME-SYMBOL: Symbols [
# RENAME-SYMBOL:   Name: bar (
# RENAME-SYMBOL:   Name: raboof (
# RENAME-SYMBOL:   Name: bazfoobar (

## Case 4: Remove section.
# RUN: llvm-objcopy %t.o %t.remove-section -R .blah.blag
# RUN: llvm-readobj --section-headers %t.remove-section \
# RUN:   | FileCheck %s --check-prefix=REMOVE-SECTION --implicit-check-not .blah.blag

# REMOVE-SECTION: Sections [
# REMOVE-SECTION:   Name: .blam.blah.blag (
# REMOVE-SECTION:   Name: .blag (

## Case 5: Remove symbol.
# RUN: llvm-objcopy %t.o %t.remove-symbol -N foobar
# RUN: llvm-readobj --symbols %t.remove-symbol \
# RUN:   | FileCheck %s --check-prefix=REMOVE-SYMBOL --implicit-check-not='Name: foobar'

# REMOVE-SYMBOL: Symbols [
# REMOVE-SYMBOL:   Name: bar (
# REMOVE-SYMBOL:   Name: bazfoobar (

--- !ELF
FileHeader:
  Class:   ELFCLASS64
  Data:    ELFDATA2LSB
  Type:    ET_EXEC
  Machine: EM_X86_64
Sections:
  - Name: .blam.blah.blag
    Type: SHT_PROGBITS
  - Name: .blah.blag
    Type: SHT_PROGBITS
  - Name: .blag
    Type: SHT_PROGBITS
Symbols:
  - Name: bar
  - Name: foobar
  - Name: bazfoobar