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- ip register cannot be used when accessing large constants in the instruction

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stream. Enhance the debug code to save and restore the unused holder_reg
  at these points.
- Fix lint issues.

Review URL: http://codereview.chromium.org/8039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
iposva@chromium.org 2008-10-21 22:40:14 +00:00
parent 202dedbdb3
commit ba6502bd64
3 changed files with 20 additions and 9 deletions
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1
src/bootstrapper.cc
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@ -526,7 +526,6 @@ void Genesis::CreateRoots(v8::Handle<v8::ObjectTemplate> global_template,
}
{ // --- G l o b a l ---
// Step 1: create a fresh inner JSGlobalObject
Handle<JSGlobalObject> object;
{

22
src/macro-assembler-arm.cc
View File

@ -671,10 +671,15 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
// Check the context is a global context.
if (FLAG_debug_code) {
// TODO(119): avoid push(holder_reg)/pop(holder_reg)
// Cannot use ip as a temporary in this verification code. Due to the fact
// that ip is clobbered as part of cmp with an object Operand.
push(holder_reg); // Temporarily save holder on the stack.
// Read the first word and compare to the global_context_map.
ldr(ip, FieldMemOperand(scratch, HeapObject::kMapOffset));
cmp(ip, Operand(Factory::global_context_map()));
ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset));
cmp(holder_reg, Operand(Factory::global_context_map()));
Check(eq, "JSGlobalObject::global_context should be a global context.");
pop(holder_reg); // Restore holder.
}
// Check if both contexts are the same.
@ -684,12 +689,19 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
// Check the context is a global context.
if (FLAG_debug_code) {
cmp(ip, Operand(Factory::null_value()));
// TODO(119): avoid push(holder_reg)/pop(holder_reg)
// Cannot use ip as a temporary in this verification code. Due to the fact
// that ip is clobbered as part of cmp with an object Operand.
push(holder_reg); // Temporarily save holder on the stack.
mov(holder_reg, ip); // Move ip to its holding place.
cmp(holder_reg, Operand(Factory::null_value()));
Check(ne, "JSGlobalProxy::context() should not be null.");
ldr(ip, FieldMemOperand(ip, HeapObject::kMapOffset));
cmp(ip, Operand(Factory::global_context_map()));
ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset));
cmp(holder_reg, Operand(Factory::global_context_map()));
Check(eq, "JSGlobalObject::global_context should be a global context.");
// Restore ip is not needed. ip is reloaded below.
pop(holder_reg); // Restore holder.
// Restore ip to holder's context.
ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset));
}