Luming Wang has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/56609 )
Change subject: arch-riscv: fix memory leak problem in page table walker
......................................................................
arch-riscv: fix memory leak problem in page table walker
Valgrind detects memory leak problems in RISC-V's page table
walker(`Walker::WalkerState::stepWalk()`). In some situation,
the response packet is not freed. This patch partially fix
these memory leak problems.
Change-Id: I86d4c69c3c502bd92856a3d8863bfa1722a94512
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56609
Reviewed-by: Jason Lowe-Power <power...@gmail.com>
Maintainer: Jason Lowe-Power <power...@gmail.com>
Reviewed-by: Ayaz Akram <yazak...@ucdavis.edu>
Tested-by: kokoro <noreply+kok...@google.com>
---
M src/arch/riscv/pagetable_walker.cc
1 file changed, 25 insertions(+), 0 deletions(-)
Approvals:
Jason Lowe-Power: Looks good to me, but someone else must approve; Looks
good to me, approved
Ayaz Akram: Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/arch/riscv/pagetable_walker.cc
b/src/arch/riscv/pagetable_walker.cc
index 81d1eb2..cbd5bd2 100644
--- a/src/arch/riscv/pagetable_walker.cc
+++ b/src/arch/riscv/pagetable_walker.cc
@@ -426,6 +426,10 @@
//If we didn't return, we're setting up another read.
RequestPtr request = std::make_shared<Request>(
nextRead, oldRead->getSize(), flags, walker->requestorId);
+
+ delete oldRead;
+ oldRead = nullptr;
+
read = new Packet(request, MemCmd::ReadReq);
read->allocate();
@@ -501,6 +505,8 @@
}
sendPackets();
} else {
+ delete pkt;
+
sendPackets();
}
if (inflight == 0 && read == NULL && writes.size() == 0) {
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I86d4c69c3c502bd92856a3d8863bfa1722a94512
Gerrit-Change-Number: 56609
Gerrit-PatchSet: 3
Gerrit-Owner: Luming Wang <wlm199...@126.com>
Gerrit-Reviewer: Ayaz Akram <yazak...@ucdavis.edu>
Gerrit-Reviewer: Hoa Nguyen <hoangu...@ucdavis.edu>
Gerrit-Reviewer: Jason Lowe-Power <ja...@lowepower.com>
Gerrit-Reviewer: Jason Lowe-Power <power...@gmail.com>
Gerrit-Reviewer: Luming Wang <wlm199...@126.com>
Gerrit-Reviewer: Nils Asmussen <nils.asmus...@barkhauseninstitut.org>
Gerrit-Reviewer: kokoro <noreply+kok...@google.com>
Gerrit-MessageType: merged
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