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CPU: gate periodic import logs and fast-path memcpy/memmove leaves (#724)

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SHARPEMU_LOG_IMPORT_PERIODIC=1 re-enables periodic Import# tracing. memcpy/memmove use a thin TryCopy leaf that skips register marshalling.
This commit is contained in:
kuba
2026-07-31 11:13:24 +02:00
committed by GitHub
parent 816ec4ad27
commit 532251c0c3
2 changed files with 59 additions and 4 deletions
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src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.cs
+8
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@@ -344,6 +344,8 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
private bool _logAllImports;
private bool _logImportPeriodic;
private bool _logImportFrames;
private bool _logImportRecent;
@@ -1161,6 +1163,12 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
_logFiber = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_FIBER"), "1", StringComparison.Ordinal);
_logBootstrap = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_BOOTSTRAP"), "1", StringComparison.Ordinal);
_logAllImports = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_ALL_IMPORTS"), "1", StringComparison.Ordinal);
// Periodic Import# spam (every 100k, early bands, NID samples) is on
// only when explicitly requested — default stderr traffic was a measurable tax.
_logImportPeriodic = string.Equals(
Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_PERIODIC"),
"1",
StringComparison.Ordinal);
_logImportFrames = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_FRAMES"), "1", StringComparison.Ordinal);
_logImportRecent = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_IMPORT_RECENT"), "1", StringComparison.Ordinal);
_logStackCheck = string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_STACK_CHK"), "1", StringComparison.Ordinal);