tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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bytecode-sharing.js (3537B)

      1 // Test that bytecode is still shared when expected. The expectations can be
      2 // updated if necessary.
      3 
      4 
      5 // Check the testing function.
      6 evaluate(`function a01(){ return a + b; }`)
      7 evaluate(`function a02(){ return a + b; }`)
      8 evaluate(`function a03(){ return a + b + c; }`)
      9 assertEq(hasSameBytecodeData(a01, a02), true)
     10 assertEq(hasSameBytecodeData(a01, a03), false)
     11 
     12 
     13 // Check effect of whitespace.
     14 evaluate(`function   b(){}`)
     15 evaluate(`function b01(){}`)
     16 evaluate(`function b02 (){}`)
     17 evaluate(`function b03( ){}`)
     18 evaluate(`function b04() {}`)
     19 evaluate(`function b05(){ }`)
     20 assertEq(hasSameBytecodeData(b, b01), true)
     21 assertEq(hasSameBytecodeData(b, b02), true)
     22 assertEq(hasSameBytecodeData(b, b03), false)
     23 assertEq(hasSameBytecodeData(b, b04), false)
     24 assertEq(hasSameBytecodeData(b, b05), false)
     25 
     26 
     27 // Check effect of binding names.
     28 evaluate(`function c01(){ return a; }`)
     29 evaluate(`function c02(){ return b; }`)
     30 evaluate(`function c03(){ return cc; }`)
     31 assertEq(hasSameBytecodeData(c01, c02), true)
     32 assertEq(hasSameBytecodeData(c01, c03), false)
     33 
     34 
     35 // Check effect of string literals.
     36 evaluate(`function d01(){ return "AA"; }`)
     37 evaluate(`function d02(){ return "BB"; }`)
     38 assertEq(hasSameBytecodeData(d01, d02), true)
     39 
     40 
     41 // Check effect of string template literals.
     42 evaluate("function e01(){ return a`AA`; }")
     43 evaluate("function e02(){ return b`BB`; }")
     44 assertEq(hasSameBytecodeData(e01, e02), true)
     45 
     46 
     47 // Check effect of object literals.
     48 evaluate(`function f01(){ return { a: 1 }; }`)
     49 evaluate(`function f02(){ return { b: 1 }; }`)
     50 evaluate(`function f03(){ return { b: 2 }; }`)
     51 assertEq(hasSameBytecodeData(f01, f02), true)
     52 assertEq(hasSameBytecodeData(f01, f03), false)
     53 
     54 
     55 // Check effect of inner functions.
     56 evaluate(`function g01(){ return () => 0; }`)
     57 evaluate(`function g02(){ return () => 0; }`)
     58 evaluate(`function g03(){ return () => a; }`)
     59 assertEq(hasSameBytecodeData(g01, g02), true)
     60 assertEq(hasSameBytecodeData(g01, g03), true)
     61 
     62 
     63 // Check effect of line number.
     64 evaluate(`function h01(){ return 0; }`)
     65 evaluate(`\nfunction h02(){ return 0; }`)
     66 evaluate(`\n\n\n\n\n\n\nfunction h03(){ return 0; }`)
     67 assertEq(hasSameBytecodeData(h01, h02), true)
     68 assertEq(hasSameBytecodeData(h01, h03), true)
     69 
     70 
     71 // Check effect of line number when function has large gaps in it. This
     72 // corresponds to SetLine source-notes.
     73 evaluate(`function i01(){ return\n\n\n\n\n\n\n\n0; }`)
     74 evaluate(`\nfunction i02(){ return\n\n\n\n\n\n\n\n0; }`)
     75 evaluate(`\n\n\n\n\n\n\nfunction i03(){ return\n\n\n\n\n\n\n\n0; }`)
     76 assertEq(hasSameBytecodeData(i01, i02), true)
     77 assertEq(hasSameBytecodeData(i01, i03), true)
     78 
     79 
     80 // Check effect of column number.
     81 evaluate(`function j01(){ return 0; }`)
     82 evaluate(` function j02(){ return 0; }`)
     83 evaluate(` \tfunction j03(){ return 0; }`)
     84 assertEq(hasSameBytecodeData(j01, j02), true)
     85 assertEq(hasSameBytecodeData(j01, j03), true)
     86 
     87 
     88 // Check different forms of functions.
     89 evaluate(`function k01      ()    { return 0; }`)
     90 evaluate(`var k02 = function()    { return 0; }`)
     91 evaluate(`var k03 =         () => { return 0; }`)
     92 assertEq(hasSameBytecodeData(k01, k02), true)
     93 assertEq(hasSameBytecodeData(k01, k03), true)
     94 
     95 
     96 // Check sharing across globals / compartments.
     97 let l02_global = newGlobal({newCompartment: false});
     98 let l03_global = newGlobal({newCompartment: true});
     99 evaluate(`function l01() { return 0; }`)
    100 l02_global.evaluate(`function l02() { return 0; }`)
    101 l03_global.evaluate(`function l03() { return 0; }`)
    102 assertEq(hasSameBytecodeData(l01, l02_global.l02), true)
    103 assertEq(hasSameBytecodeData(l01, l03_global.l03), true)