src/ia32/codegen-ia32.cc - Issue 5686006: Add array bound checks to code generated for SwapElements. This fixes a bug t...

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Unified Diff: src/ia32/codegen-ia32.cc

Issue 5686006: Add array bound checks to code generated for SwapElements. This fixes a bug t... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/

Patch Set: '' Created 10 years ago

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Index: src/ia32/codegen-ia32.cc

===================================================================

--- src/ia32/codegen-ia32.cc (revision 6016)

+++ src/ia32/codegen-ia32.cc (working copy)

@@ -7676,6 +7676,13 @@

__ test(tmp2.reg(), Immediate(kSmiTagMask));

deferred->Branch(not_zero);

+ // Check that both indices are valid.

+ __ mov(tmp2.reg(), FieldOperand(object.reg(), JSArray::kLengthOffset));

+ __ cmp(tmp2.reg(), Operand(index1.reg()));

+ deferred->Branch(below_equal);

+ __ cmp(tmp2.reg(), Operand(index2.reg()));

+ deferred->Branch(below_equal);

// Bring addresses into index1 and index2.

__ lea(index1.reg(), FixedArrayElementOperand(tmp1.reg(), index1.reg()));

__ lea(index2.reg(), FixedArrayElementOperand(tmp1.reg(), index2.reg()));

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