commit fd4a37798de7682f9caad3414975e17e47ef6ea3
author Marc Olberding <molberding@nvidia.com> Wed Sep 24 16:31:02 2025 -0700
committer Marc Olberding <molberding@nvidia.com> Thu Oct 16 15:04:29 2025 -0700
tree ce8ffb7eba41250f4ec9980bff609d2fccfdf8c5
parent 6282a4520f7e72cb47d338683eddacc6b8ba7b75

nvidia-gpu: Fix a number of object lifetime issues

Moves all subsensors and objects treated as shared_ptrs
to be using shared_from_this. This way, if there's an object lifetime
issue we don't segfault.

Also separates construction and asio init for NvidiaSmaDevice
so that when we bind to this, its valid after we leave the ctor

Change-Id: I8e3115bc276d2e0eaac0b1dc9a9d2c46e6751d4b
Signed-off-by: Marc Olberding <molberding@nvidia.com>

src/nvidia-gpu/NvidiaSmaDevice.cpp

diff --git a/src/nvidia-gpu/NvidiaSmaDevice.cpp b/src/nvidia-gpu/NvidiaSmaDevice.cpp
index 755e1f8..71d0f69 100644
--- a/src/nvidia-gpu/NvidiaSmaDevice.cpp
+++ b/src/nvidia-gpu/NvidiaSmaDevice.cpp
@@ -35,6 +35,9 @@
     waitTimer(io, std::chrono::steady_clock::duration(0)),
     mctpRequester(mctpRequester), conn(conn), objectServer(objectServer),
     configs(configs), name(escapeName(name)), path(path)
+{}
+
+void SmaDevice::init()
 {
     makeSensors();
 }
@@ -56,11 +59,18 @@
     tempSensor->update();
 
     waitTimer.expires_after(std::chrono::milliseconds(sensorPollMs));
-    waitTimer.async_wait([this](const boost::system::error_code& ec) {
-        if (ec)
-        {
-            return;
-        }
-        read();
-    });
+    waitTimer.async_wait(
+        [weak{weak_from_this()}](const boost::system::error_code& ec) {
+            std::shared_ptr<SmaDevice> self = weak.lock();
+            if (!self)
+            {
+                lg2::error("Invalid SmaDevice reference");
+                return;
+            }
+            if (ec)
+            {
+                return;
+            }
+            self->read();
+        });
 }