test-asmjs.cpp - mozsearch

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#include "gdb-tests.h"

#include "js/CompilationAndEvaluation.h"

#include "js/CompileOptions.h"

#include "js/RootingAPI.h"

#include "js/SourceText.h"

#include "js/Value.h"

#include "mozilla/Utf8.h"

#include "util/Text.h"

#include <string.h>

FRAGMENT(asmjs, segfault) {

  constexpr unsigned line0 = __LINE__;

  static const char chars[] =

      "function f(glob, ffi, heap) {\n"

      "    \"use asm\";\n"

      "    var f32 = new glob.Float32Array(heap);\n"

      "    function g(n) {\n"

      "        n = n | 0;\n"

      "        return +f32[n>>2];\n"

      "    }\n"

      "    return g;\n"

      "}\n"

      "\n"

      "var func = f(this, null, new ArrayBuffer(0x10000));\n"

      "func(0x10000 << 2);\n"

      "'ok'\n";

  JS::CompileOptions opts(cx);

  opts.setFileAndLine(__FILE__, line0 + 1);

  opts.setAsmJSOption(JS::AsmJSOption::Enabled);

  JS::SourceText<mozilla::Utf8Unit> srcBuf;

  JS::Rooted<JS::Value> rval(cx);

  bool ok =

      srcBuf.init(cx, chars, js_strlen(chars), JS::SourceOwnership::Borrowed) &&

      JS::Evaluate(cx, opts, srcBuf, &rval);

  breakpoint();

  use(ok);

  use(rval);