1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
#!/usr/bin/python2
#
# Generate a custom linker script/map file for the --enabled-mergedlibs merged library
# which reduces the startup time and enables further optimisations with --enable-lto because 60% or more
# of the symbols become internal only.
#
import subprocess
import sys
import re
import multiprocessing
exported_symbols = set()
imported_symbols = set()
# Copied from solenv/gbuild/extensions/pre_MergedLibsList.mk
# TODO there has to be a way to run gmake and get it to dump this list for me
merged_libs = { \
"avmedia" \
,"basctl" \
,"basprov" \
,"basegfx" \
,"canvasfactory" \
,"canvastools" \
,"comphelper" \
,"configmgr" \
,"cppcanvas" \
,"crashreport)" \
,"dbtools" \
,"deployment" \
,"deploymentmisc" \
,"desktopbe1)" \
,"desktop_detector)" \
,"drawinglayer" \
,"editeng" \
,"filterconfig" \
,"fsstorage" \
,"fwk" \
,"helplinker)" \
,"i18npool" \
,"i18nutil" \
,"lng" \
,"localebe1" \
,"msfilter" \
,"mtfrenderer" \
,"opencl" \
,"package2" \
,"sax" \
,"sb" \
,"simplecanvas" \
,"sfx" \
,"sofficeapp" \
,"sot" \
,"spl" \
,"stringresource" \
,"svl" \
,"svt" \
,"svx" \
,"svxcore" \
,"tk" \
,"tl" \
,"ucb1" \
,"ucbhelper" \
,"ucpexpand1" \
,"ucpfile1" \
,"unoxml" \
,"utl" \
,"uui" \
,"vcl" \
,"xmlscript" \
,"xo" \
,"xstor" }
# look for symbols exported by libmerged
subprocess_nm = subprocess.Popen("nm -D instdir/program/libmergedlo.so", stdout=subprocess.PIPE, shell=True)
with subprocess_nm.stdout as txt:
# We are looking for lines something like:
# 0000000000036ed0 T flash_component_getFactory
line_regex = re.compile(r'^[0-9a-fA-F]+ T ')
for line in txt:
line = line.strip()
if line_regex.match(line):
exported_symbols.add(line.split(" ")[2])
subprocess_nm.terminate()
# look for symbols imported from libmerged
subprocess_find = subprocess.Popen("(find instdir/program/ -type f; ls ./workdir/LinkTarget/CppunitTest/*.so) | xargs grep -l mergedlo",
stdout=subprocess.PIPE, shell=True)
with subprocess_find.stdout as txt:
for line in txt:
sharedlib = line.strip()
s = sharedlib[sharedlib.find("/lib") + 4 : len(sharedlib) - 3]
if s in merged_libs: continue
# look for imported symbols
subprocess_objdump = subprocess.Popen("objdump -T " + sharedlib, stdout=subprocess.PIPE, shell=True)
with subprocess_objdump.stdout as txt2:
# ignore some header bumpf
txt2.readline()
txt2.readline()
txt2.readline()
txt2.readline()
# We are looking for lines something like (noting that one of them uses spaces, and the other tabs)
# 0000000000000000 DF *UND* 0000000000000000 _ZN16FilterConfigItem10WriteInt32ERKN3rtl8OUStringEi
for line2 in txt2:
line2 = line2.strip()
if line2.find("*UND*") == -1: continue
tokens = line2.split(" ")
sym = tokens[len(tokens)-1].strip()
imported_symbols.add(sym)
subprocess_objdump.terminate()
subprocess_find.terminate()
intersec_symbols = exported_symbols.intersection(imported_symbols)
print("no symbols exported from libmerged = " + str(len(exported_symbols)))
print("no symbols that can be made internal = " + str(len(intersec_symbols)))
# Now look for classes where none of the class symbols are imported,
# i.e. we can mark the whole class as hidden
def extract_class(sym):
filtered_sym = subprocess.check_output(["c++filt", sym]).strip()
if filtered_sym.startswith("vtable for "):
classname = filtered_sym[11:]
return classname
if filtered_sym.startswith("non-virtual thunk to "):
filtered_sym = filtered_sym[21:]
elif filtered_sym.startswith("virtual thunk to "):
filtered_sym = filtered_sym[17:]
i = filtered_sym.find("(")
if i != -1:
i = filtered_sym.rfind("::", 0, i)
if i != -1:
classname = filtered_sym[:i]
return classname
return ""
pool = multiprocessing.Pool(multiprocessing.cpu_count())
classes_with_exported_symbols = set(pool.map(extract_class, list(exported_symbols)))
classes_with_imported_symbols = set(pool.map(extract_class, list(imported_symbols)))
# Some stuff is particular to Windows, so won't be found by a Linux analysis, so remove
# those classes.
can_be_private_classes = classes_with_exported_symbols - classes_with_imported_symbols;
can_be_private_classes.discard("SpinField")
with open("bin/find-mergedlib-can-be-private.classes.results", "wt") as f:
for sym in sorted(can_be_private_classes):
if sym.startswith("std::") or sym.startswith("void std::"): continue
f.write(sym + "\n")
|
