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comparison: js/src/jit-test/tests/debug/Debugger-onEnterFrame-resumption-05.js
js/src/jit-test/tests/debug/Debugger-onEnterFrame-resumption-05.js
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| -1:000000000000 | 0:e821bfff605c |
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| 1 // Exercise the call to ScriptDebugPrologue in js_InternalInterpret. | |
| 2 | |
| 3 // This may change, but as of this writing, inline caches (ICs) are | |
| 4 // disabled in debug mode, and those are the only users of the out-of-line entry | |
| 5 // points for JIT code (arityCheckEntry, argsCheckEntry, fastEntry); debug | |
| 6 // mode uses only invokeEntry. This means most of the bytecode tails in | |
| 7 // js_InternalInterpret that might call ScriptPrologue or ScriptEpilogue are | |
| 8 // unreachable in debug mode: they're only called from the out-of-line entry | |
| 9 // points. | |
| 10 // | |
| 11 // The exception is REJOIN_THIS_PROTOTYPE, which can be reached reliably if you | |
| 12 // add a JS_GC call to stubs::GetPropNoCache. JIT code calls that stub to | |
| 13 // retrieve the 'prototype' property of a function called as a constructor, if | |
| 14 // TI can't establish the exact identity of that prototype's value at compile | |
| 15 // time. Thus the preoccupation with constructors here. | |
| 16 | |
| 17 load(libdir + "asserts.js"); | |
| 18 | |
| 19 var debuggee = newGlobal(); | |
| 20 var dbg = Debugger(debuggee); | |
| 21 var hits, savedFrame; | |
| 22 | |
| 23 // Allow the constructor to return normally. | |
| 24 dbg.onEnterFrame = function (frame) { | |
| 25 hits++; | |
| 26 if (frame.constructing) { | |
| 27 savedFrame = frame; | |
| 28 assertEq(savedFrame.live, true); | |
| 29 return undefined; | |
| 30 } | |
| 31 return undefined; | |
| 32 }; | |
| 33 hits = 0; | |
| 34 debuggee.hits = 0; | |
| 35 savedFrame = undefined; | |
| 36 assertEq(typeof debuggee.eval("function f(){ hits++; } f.prototype = {}; new f;"), "object"); | |
| 37 assertEq(hits, 2); | |
| 38 assertEq(savedFrame.live, false); | |
| 39 assertEq(debuggee.hits, 1); | |
| 40 | |
| 41 // Force an early return from the constructor. | |
| 42 dbg.onEnterFrame = function (frame) { | |
| 43 hits++; | |
| 44 if (frame.constructing) { | |
| 45 savedFrame = frame; | |
| 46 assertEq(savedFrame.live, true); | |
| 47 return { return: "pass" }; | |
| 48 } | |
| 49 return undefined; | |
| 50 }; | |
| 51 hits = 0; | |
| 52 debuggee.hits = 0; | |
| 53 savedFrame = undefined; | |
| 54 assertEq(typeof debuggee.eval("function f(){ hits++; } f.prototype = {}; new f;"), "object"); | |
| 55 assertEq(hits, 2); | |
| 56 assertEq(savedFrame.live, false); | |
| 57 assertEq(debuggee.hits, 0); | |
| 58 | |
| 59 // Force the constructor to throw an exception. | |
| 60 dbg.onEnterFrame = function (frame) { | |
| 61 hits++; | |
| 62 if (frame.constructing) { | |
| 63 savedFrame = frame; | |
| 64 assertEq(savedFrame.live, true); | |
| 65 return { throw: "pass" }; | |
| 66 } | |
| 67 return undefined; | |
| 68 }; | |
| 69 hits = 0; | |
| 70 debuggee.hits = 0; | |
| 71 savedFrame = undefined; | |
| 72 assertThrowsValue(function () { | |
| 73 debuggee.eval("function f(){ hits++ } f.prototype = {}; new f;"); | |
| 74 }, "pass"); | |
| 75 assertEq(hits, 2); | |
| 76 assertEq(savedFrame.live, false); | |
| 77 assertEq(debuggee.hits, 0); | |
| 78 | |
| 79 // Ensure that forcing an early return only returns from one JS call. | |
| 80 debuggee.eval("function g() { var result = new f; g_hits++; return result; }"); | |
| 81 dbg.onEnterFrame = function (frame) { | |
| 82 hits++; | |
| 83 if (frame.constructing) { | |
| 84 savedFrame = frame; | |
| 85 assertEq(savedFrame.live, true); | |
| 86 return { return: "pass" }; | |
| 87 } | |
| 88 return undefined; | |
| 89 }; | |
| 90 hits = 0; | |
| 91 debuggee.hits = 0; | |
| 92 debuggee.g_hits = 0; | |
| 93 savedFrame = undefined; | |
| 94 assertEq(typeof debuggee.eval("g();"), "object"); | |
| 95 assertEq(hits, 3); | |
| 96 assertEq(savedFrame.live, false); | |
| 97 assertEq(debuggee.hits, 0); | |
| 98 assertEq(debuggee.g_hits, 1); |
