From 7c44541dd121b13e34ac2bc693e518b6e0b2d7c3 Mon Sep 17 00:00:00 2001
From: Avimitin <dev@avimit.in>
Date: Thu, 5 Sep 2024 15:36:26 +0800
Subject: [PATCH] [script] let daidir copied before emulator start

We need this to allow user interrupt the emulator run but still have
proper trace required files.

Signed-off-by: Avimitin <dev@avimit.in>
---
 script/emu/src/Main.scala | 47 ++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/script/emu/src/Main.scala b/script/emu/src/Main.scala
index efa6f13ac..d8b05c1a7 100644
--- a/script/emu/src/Main.scala
+++ b/script/emu/src/Main.scala
@@ -206,32 +206,13 @@ object Main:
       ++ optionals(isTrace, Seq(s"+t1_wave_path=${outputPath / "wave.fsdb"}"))
       ++ optionals(!leftOverArguments.isEmpty, leftOverArguments)
 
-    Logger.info(s"Starting IP emulator: `${processArgs.mkString(" ")}`")
     if dryRun.value then return
 
     val rtlEventPath = outputPath / "rtl-event.jsonl.zst"
     val journalPath  = outputPath / "online-drive-emu-journal"
-    val driverProc   = os
-      .proc(processArgs)
-      .spawn(
-        stdout = journalPath,
-        stderr = os.Pipe,
-        env = optionalMap(verbose.value, Map("RUST_LOG" -> "TRACE"))
-      )
-    val zstdProc     = os
-      .proc(Seq("zstd", "-o", s"${rtlEventPath}"))
-      .spawn(
-        stdin = driverProc.stderr,
-        stdout = os.Inherit,
-        stderr = os.Inherit
-      )
+    val statePath    = outputPath / "driver-state.json"
 
-    zstdProc.join(-1)
-    driverProc.join(-1)
-    if zstdProc.exitCode() != 0 then Logger.fatal("fail to compress data")
-    if driverProc.exitCode() != 0 then Logger.fatal("online driver run failed")
-
-    val statePath = outputPath / "driver-state.json"
+    // Save information of this run, so that user can start offline check without arguments
     os.write(
       statePath,
       ujson.write(
@@ -243,6 +224,7 @@ object Main:
       )
     )
 
+    // For vcs trace simulator, we need daidir keep at same directory as the wave.fsdb file
     if finalEmuType.get == "vcs-emu-trace" then
       val libPath    = emulator / os.up / os.up / "lib"
       val daidirPath =
@@ -253,6 +235,29 @@ object Main:
       val daidirName = daidirPath.segments.toSeq.last
       os.symlink(outputPath / daidirName, daidirPath)
 
+    Logger.info(s"Starting IP emulator: `${processArgs.mkString(" ")}`")
+
+    val driverProc = os
+      .proc(processArgs)
+      .spawn(
+        stdout = journalPath,
+        stderr = os.Pipe,
+        env = optionalMap(verbose.value, Map("RUST_LOG" -> "TRACE"))
+      )
+    val zstdProc   = os
+      .proc(Seq("zstd", "-o", s"${rtlEventPath}"))
+      .spawn(
+        stdin = driverProc.stderr,
+        stdout = os.Inherit,
+        stderr = os.Inherit
+      )
+
+    zstdProc.join(-1)
+    driverProc.join(-1)
+    if zstdProc.exitCode() != 0 then Logger.fatal("fail to compress data")
+    if driverProc.exitCode() != 0 then Logger.fatal("online driver run failed")
+
+    Logger.info("Driver finished")
     Logger.info(s"Output saved under ${outputPath}")
   end run