SF: fix floating-point-exception in SurfaceFlinger::setCompositorTimingSnapped try 2
Change-Id: I3bec50de41175144b48f1381958ba63dd3e56280
Fixes: 216829967
Test: build
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index dc88793..2cd34e9 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2344,16 +2344,19 @@
void SurfaceFlinger::setCompositorTimingSnapped(const DisplayStatInfo& stats,
nsecs_t compositeToPresentLatency) {
+ // Avoid division by 0 by defaulting to 60Hz
+ const auto vsyncPeriod = stats.vsyncPeriod ?: (60_Hz).getPeriodNsecs();
+
// Integer division and modulo round toward 0 not -inf, so we need to
// treat negative and positive offsets differently.
nsecs_t idealLatency = (mVsyncConfiguration->getCurrentConfigs().late.sfOffset > 0)
- ? (stats.vsyncPeriod -
- (mVsyncConfiguration->getCurrentConfigs().late.sfOffset % stats.vsyncPeriod))
- : ((-mVsyncConfiguration->getCurrentConfigs().late.sfOffset) % stats.vsyncPeriod);
+ ? (vsyncPeriod -
+ (mVsyncConfiguration->getCurrentConfigs().late.sfOffset % vsyncPeriod))
+ : ((-mVsyncConfiguration->getCurrentConfigs().late.sfOffset) % vsyncPeriod);
// Just in case mVsyncConfiguration->getCurrentConfigs().late.sf == -vsyncInterval.
if (idealLatency <= 0) {
- idealLatency = stats.vsyncPeriod;
+ idealLatency = vsyncPeriod;
}
// Snap the latency to a value that removes scheduling jitter from the
@@ -2362,16 +2365,14 @@
// something (such as user input) to an accurate diasplay time.
// Snapping also allows an app to precisely calculate
// mVsyncConfiguration->getCurrentConfigs().late.sf with (presentLatency % interval).
- const nsecs_t bias = stats.vsyncPeriod / 2;
- const int64_t extraVsyncs = (stats.vsyncPeriod) > 0 ?
- ((compositeToPresentLatency - idealLatency + bias) / stats.vsyncPeriod) :
- 0;
+ const nsecs_t bias = vsyncPeriod / 2;
+ const int64_t extraVsyncs = ((compositeToPresentLatency - idealLatency + bias) / vsyncPeriod);
const nsecs_t snappedCompositeToPresentLatency =
- (extraVsyncs > 0) ? idealLatency + (extraVsyncs * stats.vsyncPeriod) : idealLatency;
+ (extraVsyncs > 0) ? idealLatency + (extraVsyncs * vsyncPeriod) : idealLatency;
std::lock_guard<std::mutex> lock(getBE().mCompositorTimingLock);
getBE().mCompositorTiming.deadline = stats.vsyncTime - idealLatency;
- getBE().mCompositorTiming.interval = stats.vsyncPeriod;
+ getBE().mCompositorTiming.interval = vsyncPeriod;
getBE().mCompositorTiming.presentLatency = snappedCompositeToPresentLatency;
}