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Ensure that LRandom restores rsi after call to the C function on x64.

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R=ulan@chromium.org
BUG=http://crbug.com/110509
TEST=test/mjsunit/regress/regress-110509.js

Review URL: https://chromiumcodereview.appspot.com/9265003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10434 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
vegorov@chromium.org 2012-01-19 08:43:34 +00:00
parent a334f2af54
commit 704c92ce95
2 changed files with 42 additions and 0 deletions
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1
src/x64/lithium-codegen-x64.cc
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@ -2962,6 +2962,7 @@ void LCodeGen::DoRandom(LRandom* instr) {
__ movq(global_object,
FieldOperand(global_object, GlobalObject::kGlobalContextOffset));
__ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
// Convert 32 random bits in rax to 0.(32 random bits) in a double
// by computing:

41
test/mjsunit/regress/regress-110509.js Normal file
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@ -0,0 +1,41 @@
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --allow-natives-syntax
// Verify that LRandom preserves rsi correctly.
function foo() {
Math.random();
new Function("");
}
foo();
foo();
foo();
%OptimizeFunctionOnNextCall(foo);
foo();