tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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test-asmjs.cpp (1113B)

      1 #include "gdb-tests.h"
      2 #include "js/CompilationAndEvaluation.h"
      3 #include "js/CompileOptions.h"
      4 #include "js/RootingAPI.h"
      5 #include "js/SourceText.h"
      6 #include "js/Value.h"
      7 #include "mozilla/Utf8.h"
      8 #include "util/Text.h"
      9 
     10 #include <string.h>
     11 
     12 FRAGMENT(asmjs, segfault) {
     13  constexpr unsigned line0 = __LINE__;
     14  static const char chars[] =
     15      "function f(glob, ffi, heap) {\n"
     16      "    \"use asm\";\n"
     17      "    var f32 = new glob.Float32Array(heap);\n"
     18      "    function g(n) {\n"
     19      "        n = n | 0;\n"
     20      "        return +f32[n>>2];\n"
     21      "    }\n"
     22      "    return g;\n"
     23      "}\n"
     24      "\n"
     25      "var func = f(this, null, new ArrayBuffer(0x10000));\n"
     26      "func(0x10000 << 2);\n"
     27      "'ok'\n";
     28 
     29  JS::CompileOptions opts(cx);
     30  opts.setFileAndLine(__FILE__, line0 + 1);
     31  opts.setAsmJSOption(JS::AsmJSOption::Enabled);
     32 
     33  JS::SourceText<mozilla::Utf8Unit> srcBuf;
     34  JS::Rooted<JS::Value> rval(cx);
     35 
     36  bool ok =
     37      srcBuf.init(cx, chars, js_strlen(chars), JS::SourceOwnership::Borrowed) &&
     38      JS::Evaluate(cx, opts, srcBuf, &rval);
     39 
     40  breakpoint();
     41 
     42  use(ok);
     43  use(rval);
     44 }