FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
emscripten/tools/client_mods.py at universal-python · JavaScriptIOT/emscripten · GitHub
Uh oh!
There was an error while loading.
Please reload this page
.
JavaScriptIOT
/
emscripten
Public
forked from
emscripten-core/emscripten
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Pull requests
0
Actions
Projects
Wiki
Security and quality
0
Insights
Additional navigation options
Code
Pull requests
Actions
Projects
Wiki
Security and quality
Insights
Expand file tree
Breadcrumbs
emscripten
/
tools
/
client_mods.py
Copy path
More file actions
More file actions
Latest commit
History
History
History
186 lines (159 loc) · 13.7 KB
Breadcrumbs
emscripten
/
tools
/
client_mods.py
Copy path
File metadata and controls
186 lines (159 loc) · 13.7 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
class
PreciseF32
:
name
=
'PRECISE_F32 == 2'
@
staticmethod
def
get
(
settings
,
minified
):
if
settings
.
PRECISE_F32
==
2
:
# Potentially-modifiable code, load as text, modify, then execute. This lets you
# patch the code on the client machine right before it is executed, perhaps based
# on information about the client.
mod
=
'''
console.log('optimizing out Math.fround calls');
code = code.replace("'use asm'", "'almost asm'").replace('"use asm"', '"almost asm"');
'''
if
not
minified
:
# simple dumb replace
mod
+=
"code = code.replace(/Math_fround\(/g, '(')
\n
"
;
else
:
# minified, not quite so simple
mod
+=
'''
try {
console.log('optimizing out Math.fround calls');
var m = /var ([^=]+)=global\.Math\.fround;/.exec(code);
var minified = m[1];
if (!minified) throw 'fail';
do {
var moar = false; // we need to re-do, as x(x( will not be fixed
code = code.replace(new RegExp('[^a-zA-Z0-9
\\
\\
$
\\
\\
_]' + minified + '
\\
\\
(', 'g'), function(s) { moar = true; return s[0] + '(' });
} while (moar);
} catch(e) { console.log('failed to optimize out Math.fround calls ' + e) }
'''
return
[
'if (!Math.fround) { '
+
mod
+
' }'
]
return
[]
class
Pthreads
:
name
=
'USE_PTHREADS == 2'
@
staticmethod
def
get
(
settings
,
minified
):
if
settings
.
USE_PTHREADS
==
2
:
return
[
'''if (typeof SharedInt8Array === "undefined") {
try {
console.log('This browser does not support SharedArrayBuffer/Atomics/pthreads! Patching out SharedArrayBuffer usage...');
var t0 = performance.now();
// "new global.SharedInt8Array(buffer)" -> "new global.Int8Array(buffer)" and likewise for other buffer types.
code = code.replace(/new\s+global\.Shared(.*?)Array\(buffer\);/g, "new global.$1Array(buffer);");
// In minified builds the interesting symbol names are mangled, so we have to first find what they are.
var math_fround = /var\s+([^=]+?)\s*=\s*global\.Math\.fround;/.exec(code);
var cp;
var zero;
if (math_fround && math_fround.length >= 2) {
math_fround = math_fround[1] + '(';
cp = ')';
zero = math_fround + '0)';
} else {
math_fround = "+";
cp = '';
zero = '0.0';
}
var heap8 = /var\s+([^=]+?)\s*=\s*new global\.Int8Array\(buffer\);/.exec(code)[1];
var heap16 = /var\s+([^=]+?)\s*=\s*new global\.Int16Array\(buffer\);/.exec(code)[1];
var heap32 = /var\s+([^=]+?)\s*=\s*new global\.Int32Array\(buffer\);/.exec(code)[1];
var heapf32 = /var\s+([^=]+?)\s*=\s*new global\.Float32Array\(buffer\);/.exec(code)[1];
var heapf64 = /var\s+([^=]+?)\s*=\s*new global\.Float64Array\(buffer\);/.exec(code)[1];
var atomics_load = /var\s+([^=]+?)\s*=\s*global\.Atomics\.load;/.exec(code)[1];
var atomics_store = /var\s+([^=]+?)\s*=\s*global\.Atomics\.store;/.exec(code)[1];
var atomics_compareExchange = /var\s+([^=]+?)\s*=\s*global\.Atomics\.compareExchange;/.exec(code)[1];
var atomics_add = /var\s+([^=]+?)\s*=\s*global\.Atomics\.add;/.exec(code)[1];
var atomics_sub = /var\s+([^=]+?)\s*=\s*global\.Atomics\.sub;/.exec(code)[1];
var atomics_and = /var\s+([^=]+?)\s*=\s*global\.Atomics\.and;/.exec(code)[1];
var atomics_or = /var\s+([^=]+?)\s*=\s*global\.Atomics\.or;/.exec(code)[1];
var atomics_xor = /var\s+([^=]+?)\s*=\s*global\.Atomics\.xor;/.exec(code)[1];
var atomics_fence = /var\s+([^=]+?)\s*=\s*global\.Atomics\.fence;/.exec(code)[1];
// "Atomics_load(HEAP32, index)" -> "HEAP32[index]|0" and same for other heap types.
code = code.replace(new RegExp('
\\
\\
b' + atomics_load + '
\\
\\
((' + heap8 + ')\w*,(.*?)
\\
\\
\)', 'g'), "($1[$2]|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_load + '
\\
\\
((' + heap16 + ')\w*,(.*?)
\\
\\
\)', 'g'), "($1[$2]|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_load + '
\\
\\
((' + heap32 + ')\w*,(.*?)
\\
\\
\)', 'g'), "($1[$2]|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_load + '
\\
\\
((' + heapf32 + ')\w*,(.*?)
\\
\\
\)', 'g'), math_fround + "$1[$2]"+cp);
code = code.replace(new RegExp('
\\
\\
b' + atomics_load + '
\\
\\
((' + heapf64 + ')\w*,(.*?)
\\
\\
\)', 'g'), "(+$1[$2])");
// "Atomics_store(HEAP32, index, value)" -> "HEAP32[index] = value" and same for other heap types.
code = code.replace(new RegExp('
\\
\\
b' + atomics_store + '
\\
\\
((.*?),(.*?),(.*?)
\\
\\
\)', 'g'), "($1[$2] = $3)");
// The Atomics built-ins take as first parameter the heap object, however when replacing those with
// polyfill versions, it is not possible to pass a heap object as the first parameter. Therefore
// route each call to Atomics to a polyfill function for each type, e.g. "Atomics_add(HEAP32, index, val)" -> "Atomics_add_32(index, val)"
code = code.replace(new RegExp('
\\
\\
b' + atomics_add + '
\\
\\
('+heap8+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_add + "_8($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_add + '
\\
\\
('+heap16+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_add + "_16($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_add + '
\\
\\
('+heap32+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_add + "_32($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_add + '
\\
\\
('+heapf32+',(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_add + "_f32($1,$2)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_add + '
\\
\\
('+heapf64+',(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_add + "_f64($1,$2)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_sub + '
\\
\\
('+heap8+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_sub + "_8($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_sub + '
\\
\\
('+heap16+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_sub + "_16($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_sub + '
\\
\\
('+heap32+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_sub + "_32($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_sub + '
\\
\\
('+heapf32+',(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_sub + "_f32($1,$2)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_sub + '
\\
\\
('+heapf64+',(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_sub + "_f64($1,$2)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_and + '
\\
\\
('+heap8+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_and + "_8($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_and + '
\\
\\
('+heap16+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_and + "_16($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_and + '
\\
\\
('+heap32+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_and + "_32($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_or + '
\\
\\
('+heap8+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_or + "_8($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_or + '
\\
\\
('+heap16+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_or + "_16($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_or + '
\\
\\
('+heap32+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_or + "_32($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_xor + '
\\
\\
('+heap8+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_xor + "_8($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_xor + '
\\
\\
('+heap16+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_xor + "_16($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_xor + '
\\
\\
('+heap32+',(.*?),(.*?)
\\
\\
\)', 'g'), '((' + atomics_xor + "_32($1,$2)|0)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_compareExchange + '
\\
\\
('+heap8+',(.*?),(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_compareExchange + "_8($1,$2,$3)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_compareExchange + '
\\
\\
('+heap16+',(.*?),(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_compareExchange + "_16($1,$2,$3)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_compareExchange + '
\\
\\
('+heap32+',(.*?),(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_compareExchange + "_32($1,$2,$3)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_compareExchange + '
\\
\\
('+heapf32+',(.*?),(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_compareExchange + "_f32($1,$2,$3)|0)");
code = code.replace(new RegExp('
\\
\\
b' + atomics_compareExchange + '
\\
\\
('+heapf64+',(.*?),(.*?),(.*?)
\\
\\
\)', 'g'), '(' + atomics_compareExchange + "_f64($1,$2,$3)|0)");
// Remove the import statements of Atomics built-ins.
code = code.replace(new RegExp("var " + atomics_load + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.load;"), "");
code = code.replace(new RegExp("var " + atomics_store + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.store;"), "");
code = code.replace(new RegExp("var " + atomics_compareExchange + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.compareExchange;"), "");
code = code.replace(new RegExp("var " + atomics_add + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.add;"), "");
code = code.replace(new RegExp("var " + atomics_sub + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.sub;"), "");
code = code.replace(new RegExp("var " + atomics_and + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.and;"), "");
code = code.replace(new RegExp("var " + atomics_or + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.or;"), "");
code = code.replace(new RegExp("var " + atomics_xor + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.xor;"), "");
code = code.replace(new RegExp("var " + atomics_fence + "
\\
\\
s*=
\\
\\
s*global
\\
.Atomics
\\
.fence;"), "");
// Implement polyfill versions of Atomics intrinsics inside the asm.js scope.
code = code.replace("// EMSCRIPTEN_START_FUNCS", "// EMSCRIPTEN_START_FUNCS
\\
n"
+ "function " + atomics_add + "_8(i,v) { i=i|0; v=v|0; var w=0; w="+heap8+"[i>>0]|0; "+heap8+"[i>>0]=("+heap8+"[i>>0]|0)+(v|0); return w|0; }
\\
n"
+ "function " + atomics_add + "_16(i,v) { i=i|0; v=v|0; var w=0; w="+heap16+"[i<<1>>1]|0; "+heap16+"[i<<1>>1]=("+heap16+"[i<<1>>1]|0)+(v|0); return w|0; }
\\
n"
+ "function " + atomics_add + "_32(i,v) { i=i|0; v=v|0; var w=0; w="+heap32+"[i<<2>>2]|0; "+heap32+"[i<<2>>2]=("+heap32+"[i<<2>>2]|0)+(v|0); return w|0; }
\\
n"
+ "function " + atomics_add + "_f32(i,v) { i=i|0; v="+math_fround+"v"+cp+"; var w="+zero+"; w="+math_fround+heapf32+"[i<<2>>2]"+cp+"; "+heapf32+"[i<<2>>2]="+math_fround+heapf32+"[i<<2>>2]"+cp+"+v; return w; }
\\
n"
+ "function " + atomics_add + "_f64(i,v) { i=i|0; v=+v; var w=0.0; w=+"+heapf64+"[i<<3>>3]; "+heapf64+"[i<<3>>3]="+heapf64+"[i<<3>>3]+v; return w; }
\\
n"
+ "function " + atomics_sub + "_8(i,v) { i=i|0; v=v|0; var w=0; w="+heap8+"[i>>0]|0; "+heap8+"[i>>0]=("+heap8+"[i>>0]|0)-(v|0); return w|0; }
\\
n"
+ "function " + atomics_sub + "_16(i,v) { i=i|0; v=v|0; var w=0; w="+heap16+"[i<<1>>1]|0; "+heap16+"[i<<1>>1]=("+heap16+"[i<<1>>1]|0)-(v|0); return w|0; }
\\
n"
+ "function " + atomics_sub + "_32(i,v) { i=i|0; v=v|0; var w=0; w="+heap32+"[i<<2>>2]|0; "+heap32+"[i<<2>>2]=("+heap32+"[i<<2>>2]|0)-(v|0); return w|0; }
\\
n"
+ "function " + atomics_sub + "_f32(i,v) { i=i|0; v="+math_fround+"v"+cp+"; var w="+zero+"; w="+math_fround+heapf32+"[i<<2>>2]"+cp+"; "+heapf32+"[i<<2>>2]="+math_fround+heapf32+"[i<<2>>2]"+cp+"-v; return w; }
\\
n"
+ "function " + atomics_sub + "_f64(i,v) { i=i|0; v=+v; var w=0.0; w=+"+heapf64+"[i<<3>>3]; "+heapf64+"[i<<3>>3]="+heapf64+"[i<<3>>3]-v; return w; }
\\
n"
+ "function " + atomics_and + "_8(i,v) { i=i|0; v=v|0; var w=0; w="+heap8+"[i>>0]|0; "+heap8+"[i>>0]=("+heap8+"[i>>0]|0)&(v|0); return w|0; }
\\
n"
+ "function " + atomics_and + "_16(i,v) { i=i|0; v=v|0; var w=0; w="+heap16+"[i<<1>>1]|0; "+heap16+"[i<<1>>1]=("+heap16+"[i<<1>>1]|0)&(v|0); return w|0; }
\\
n"
+ "function " + atomics_and + "_32(i,v) { i=i|0; v=v|0; var w=0; w="+heap32+"[i<<2>>2]|0; "+heap32+"[i<<2>>2]=("+heap32+"[i<<2>>2]|0)&(v|0); return w|0; }
\\
n"
+ "function " + atomics_or + "_8(i,v) { i=i|0; v=v|0; var w=0; w="+heap8+"[i>>0]|0; "+heap8+"[i>>0]=("+heap8+"[i>>0]|0)|(v|0); return w|0; }
\\
n"
+ "function " + atomics_or + "_16(i,v) { i=i|0; v=v|0; var w=0; w="+heap16+"[i<<1>>1]|0; "+heap16+"[i<<1>>1]=("+heap16+"[i<<1>>1]|0)|(v|0); return w|0; }
\\
n"
+ "function " + atomics_or + "_32(i,v) { i=i|0; v=v|0; var w=0; w="+heap32+"[i<<2>>2]|0; "+heap32+"[i<<2>>2]=("+heap32+"[i<<2>>2]|0)|(v|0); return w|0; }
\\
n"
+ "function " + atomics_xor + "_8(i,v) { i=i|0; v=v|0; var w=0; w="+heap8+"[i>>0]|0; "+heap8+"[i>>0]=("+heap8+"[i>>0]|0)^(v|0); return w|0; }
\\
n"
+ "function " + atomics_xor + "_16(i,v) { i=i|0; v=v|0; var w=0; w="+heap16+"[i<<1>>1]|0; "+heap16+"[i<<1>>1]=("+heap16+"[i<<1>>1]|0)^(v|0); return w|0; }
\\
n"
+ "function " + atomics_xor + "_32(i,v) { i=i|0; v=v|0; var w=0; w="+heap32+"[i<<2>>2]|0; "+heap32+"[i<<2>>2]=("+heap32+"[i<<2>>2]|0)^(v|0); return w|0; }
\\
n"
+ "function " + atomics_compareExchange + "_8(i,e,r) { i=i|0; e=e|0; r=r|0; var w=0; w="+heap8+"[i>>0]|0; if ((w|0) == (e|0)) "+heap8+"[i>>0]=r; return w|0; }
\\
n"
+ "function " + atomics_compareExchange + "_16(i,e,r) { i=i|0; e=e|0; r=r|0; var w=0; w="+heap16+"[i<<1>>1]|0; if ((w|0) == (e|0)) "+heap16+"[i<<1>>1]=r; return w|0; }
\\
n"
+ "function " + atomics_compareExchange + "_32(i,e,r) { i=i|0; e=e|0; r=r|0; var w=0; w="+heap32+"[i<<2>>2]|0; if ((w|0) == (e|0)) "+heap32+"[i<<2>>2]=r; return w|0; }
\\
n"
+ "function " + atomics_compareExchange + "_f32(i,e,r) { i=i|0; e="+math_fround+"e"+cp+"; r="+math_fround+"r"+cp+"; var w="+zero+"; w="+math_fround+heapf32+"[i<<2>>2]"+cp+"; if (w == e) "+heapf32+"[i<<2>>2]=r; return w; }
\\
n"
+ "function " + atomics_compareExchange + "_f64(i,e,r) { i=i|0; e=+e; r=+r; var w=0.0; w=+"+heapf64+"[i<<3>>3]; if (+w == +e) "+heapf64+"[i<<3>>3]=r; return w; }
\\
n"
+ "function " + atomics_fence + "() {}
\\
n"
);
var t1 = performance.now();
console.log('SAB+Atomics removed in ' + (t1-t0) + ' msecs.');
} catch(e) { console.log('Failed to optimize out SharedArrayBuffer calls ' + e); }
} // if no SharedInt8Array
'''
]
return
[]
# Handlers
handlers
=
[
PreciseF32
,
Pthreads
]
# client-side asm code modification
def
get_mods
(
settings
,
minified
,
separate_asm
):
ret
=
[]
for
handler
in
handlers
:
curr
=
handler
.
get
(
settings
,
minified
)
if
curr
:
assert
separate_asm
,
'options that modify code on the client, like '
+
handler
.
name
+
', require --separate-asm'
ret
=
ret
+
curr
return
ret
Back
|
FazBrowse Home
|
New Git URL