46 lines
1.6 KiB
Diff
Executable File
46 lines
1.6 KiB
Diff
Executable File
From 3070d796490221304ef226560ad2a837c3de4401 Mon Sep 17 00:00:00 2001
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Date: Sat, 31 Oct 2020 14:17:53 +0800
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Subject: [PATCH] 8248336: AArch64: C2: offset overflow in BoxLockNode::emit
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Summary: <C2>: offset overflow in BoxLockNode::emit
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LLT: jtreg
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Bug url: https://bugs.openjdk.java.net/browse/JDK-8248336
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---
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src/hotspot/cpu/aarch64/aarch64.ad | 16 ++++++++++------
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1 file changed, 10 insertions(+), 6 deletions(-)
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diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
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index 827ec9e..617b2b8 100644
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--- a/src/hotspot/cpu/aarch64/aarch64.ad
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+++ b/src/hotspot/cpu/aarch64/aarch64.ad
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@@ -2071,16 +2071,20 @@ void BoxLockNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
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int offset = ra_->reg2offset(in_RegMask(0).find_first_elem());
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int reg = ra_->get_encode(this);
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- if (Assembler::operand_valid_for_add_sub_immediate(offset)) {
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- __ add(as_Register(reg), sp, offset);
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- } else {
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- ShouldNotReachHere();
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- }
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+ // This add will handle any 24-bit signed offset. 24 bits allows an
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+ // 8 megabyte stack frame.
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+ __ add(as_Register(reg), sp, offset);
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}
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uint BoxLockNode::size(PhaseRegAlloc *ra_) const {
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// BoxLockNode is not a MachNode, so we can't just call MachNode::size(ra_).
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- return 4;
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+ int offset = ra_->reg2offset(in_RegMask(0).find_first_elem());
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+
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+ if (Assembler::operand_valid_for_add_sub_immediate(offset)) {
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+ return NativeInstruction::instruction_size;
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+ } else {
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+ return 2 * NativeInstruction::instruction_size;
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+ }
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}
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//=============================================================================
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--
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1.8.3.1
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