DOTNET_PerfMapEnabled behavior in .NET 10.0 #120419
Description
It seems that in .NET 10.0 DOTNET_PerfMapStubGranularity=2 (or =3) is required, otherwise managed symbols don't show up.
Minimal repro:
class Program
{
static void Main(string[] args)
{
for (int i = 0; i < 30000000; i++)
Guid.Parse(Guid.NewGuid().ToString());
Console.WriteLine("Done");
}
}run.sh:
TFM=net10.0
rm -rf bin obj out$TFM
dotnet publish -f $TFM --sc -r linux-x64 -o out$TFM -p:PublishTrimmed=true -p:PublishReadyToRun=true
dotnet-symbol --symbols ./out$TFM/System.Private.CoreLib.dll
dotnet-symbol --symbols ./out$TFM/libcoreclr.so
DOTNET_PerfMapEnabled=1 perf record -k 1 -g -- ./out$TFM/myapp
perf inject --input perf.data --jit --output perfjit.data
perf report --input perfjit.data --no-children.NET 9.0:
.NET 10.0:
.NET 10.0 with DOTNET_PerfMapStubGranularity=2:
PS: looks like it still makes sense to disable W^X during