From 771a9c21cc2f401cb9fd653cefcfe9da78b8f1a7 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Tue, 29 Sep 2020 16:19:37 -0300
Subject: [PATCH] common/wall_clock: Add virtual destructors

From -fsanitize=address, this code wasn't calling the proper destructor.
Adding virtual destructors for each inherited class and the base class
fixes this bug.

While we are at it, mark the functions as final.
---
 src/common/wall_clock.cpp     | 2 +-
 src/common/wall_clock.h       | 2 ++
 src/common/x64/native_clock.h | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp
index 3afbdb898d..7a20e95b77 100644
--- a/src/common/wall_clock.cpp
+++ b/src/common/wall_clock.cpp
@@ -15,7 +15,7 @@ namespace Common {
 using base_timer = std::chrono::steady_clock;
 using base_time_point = std::chrono::time_point<base_timer>;
 
-class StandardWallClock : public WallClock {
+class StandardWallClock final : public WallClock {
 public:
     StandardWallClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequency)
         : WallClock(emulated_cpu_frequency, emulated_clock_frequency, false) {
diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h
index 5db30083d3..bc7adfbf82 100644
--- a/src/common/wall_clock.h
+++ b/src/common/wall_clock.h
@@ -13,6 +13,8 @@ namespace Common {
 
 class WallClock {
 public:
+    virtual ~WallClock() = default;
+
     /// Returns current wall time in nanoseconds
     [[nodiscard]] virtual std::chrono::nanoseconds GetTimeNS() = 0;
 
diff --git a/src/common/x64/native_clock.h b/src/common/x64/native_clock.h
index 891a3bbfd8..7c503df268 100644
--- a/src/common/x64/native_clock.h
+++ b/src/common/x64/native_clock.h
@@ -12,7 +12,7 @@
 namespace Common {
 
 namespace X64 {
-class NativeClock : public WallClock {
+class NativeClock final : public WallClock {
 public:
     NativeClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequency, u64 rtsc_frequency);