supersize: Track symbol aliases and shared symbols

tools/binary_size/libsupersize/testdata/mock_toolchain/mock_readelf.py

Index: tools/binary_size/libsupersize/testdata/mock_toolchain/mock_readelf.py
diff --git a/tools/binary_size/libsupersize/testdata/mock_toolchain/mock_readelf.py b/tools/binary_size/libsupersize/testdata/mock_toolchain/mock_readelf.py
new file mode 100644
index 0000000000000000000000000000000000000000..ccfa532f752d320daccebba4620b4d7192f1a0b1
--- /dev/null
+++ b/tools/binary_size/libsupersize/testdata/mock_toolchain/mock_readelf.py
@@ -0,0 +1,93 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import sys
+
+
+_HEADERS = """ELF Header:
+  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
+  Class:                             ELF32
+  Data:                              2's complement, little endian
+  Version:                           1 (current)
+  OS/ABI:                            UNIX - System V
+  ABI Version:                       0
+  Type:                              DYN (Shared object file)
+  Machine:                           ARM
+  Version:                           0x1
+  Entry point address:               0x0
+  Start of program headers:          52 (bytes into file)
+  Start of section headers:          628588000 (bytes into file)
+  Flags:                             0x5000200, Version5 EABI, soft-float ABI
+  Size of this header:               52 (bytes)
+  Size of program headers:           32 (bytes)
+  Number of program headers:         9
+  Size of section headers:           40 (bytes)
+  Number of section headers:         40
+  Section header string table index: 39
+"""
+
+_SECTIONS = """There are 40 section headers, starting at offset 0x25777de0:
+
+Section Headers:
+  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
+  [ 0]                   NULL            00000000 000000 000000 00      0   0  0
+  [ 1] .interp           PROGBITS        00000154 000154 000013 00   A  0   0  1
+  [ 2] .note.gnu.build-id NOTE           00000168 000168 000024 00   A  0   0  4
+  [ 3] .dynsym           DYNSYM          0000018c 00018c 001960 10   A  4   1  4
+  [ 4] .dynstr           STRTAB          00001b0c 001b0c 000fb9 00   A  0   0  1
+  [ 5] .hash             HASH            00002ad4 002ad4 000a7c 04   A  3   0  4
+  [ 6] .gnu.version      VERSYM          00003558 003558 00032c 02   A  3   0  2
+  [ 7] .gnu.version_d    VERDEF          00003888 003888 00001c 00   A  4   1  4
+  [ 8] .gnu.version_r    VERNEED         000038a4 0038a4 000060 00   A  4   3  4
+  [ 9] .rel.dyn          REL             00003904 003904 288498 08   A  3   0  4
+  [10] .rel.plt          REL             0029fbec 29fbec 000b00 08   A  3   0  4
+  [11] .plt              PROGBITS        002a06ec 2a06ec 001094 00  AX  0   0  4
+  [12] .text             PROGBITS       002a1780 2a1780 223cd28 00  AX  0   0 64
+  [13] .rodata           PROGBITS      02605000 2605000 5a72e4 00   A  0   0 256
+  [14] .ARM.exidx        ARM_EXIDX      02bd3d10 2bd3d10 1771c8 08  AL 12   0  4
+  [15] .ARM.extab        PROGBITS       02bd5858 2bd5858 02cd50 00   A  0   0  4
+  [16] .data.rel.ro.local PROGBITS      02bdac40 2bd9c40 0c0e08 00  WA  0   0 16
+  [17] .data.rel.ro      PROGBITS       02c9d420 2c9c420 104108 00  WA  0   0 16
+  [18] .init_array       INIT_ARRAY     02da4680 2da3680 000008 00  WA  0   0  4
+  [19] .fini_array       FINI_ARRAY     02da4774 2da3774 000008 00  WA  0   0  4
+  [20] .dynamic          DYNAMIC        02da477c 2da377c 000130 08  WA  4   0  4
+  [21] .got              PROGBITS       02da48b4 2da38b4 00a7cc 00  WA  0   0  4
+  [22] .data             PROGBITS       02db0000 2daf000 018d88 00  WA  0   0 32
+  [23] .bss              NOBITS         02dc8220 2dc7220 13d7e8 00  WA  0   0 32
+  [35] .note.gnu.gold-version NOTE     00000000 226c41e8 00001c 00      0   0  4
+  [36] .ARM.attributes  ARM_ATTRIBUTES 00000000 226c4204 00003c 00      0   0  1
+  [37] .symtab           SYMTAB    00000000 226c4240 105ef20 10     38 901679  4
+  [38] .strtab           STRTAB       00000000 23487ea0 213a4fe 00      0   0  1
+  [39] .shstrtab         STRTAB        00000000 25777c2a 0001b4 00      0   0  1
+Key to Flags:
+  W (write), A (alloc), X (execute), M (merge), S (strings)
+  I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
+  O (extra OS processing required) o (OS specific), p (processor specific)
+"""
+
+_NOTES = """
+Displaying notes found at file offset 0x00000168 with length 0x00000024:
+  Owner                 Data size\tDescription
+  GNU                   0x00000014\tNT_GNU_BUILD_ID (unique build ID bitstring)
+    Build ID: WhatAnAmazingBuildId
+
+Displaying notes found at file offset 0x226c41e8 with length 0x0000001c:
+  Owner                 Data size\tDescription
+  GNU                   0x00000009\tNT_GNU_GOLD_VERSION (gold version)
+"""
+
+
+def main():
+  if sys.argv[1] == '-h':
+    sys.stdout.write(_HEADERS)
+  elif sys.argv[1] == '-S':
+    sys.stdout.write(_SECTIONS)
+  elif sys.argv[1] == '-n':
+    sys.stdout.write(_NOTES)
+  else:
+    assert False, 'Invalid args: %s' % sys.argv
+
+
+if __name__ == '__main__':
+  main()