[WiP]: Loading verilator as shared libraries

src/main/scala/chisel3/iotesters/ChiselMain.scala

@@ -82,7 +82,7 @@ object chiselMain {
           Seq(),
           new File(dir, s"$dutName-harness.cpp")).! == 0)
         // Compile Verilator
-        assert(chisel3.Driver.cppToExe(dutName, dir).! == 0)
+        assert(setupVerilatorBackend.cppToSo(dutName, dir).! == 0)
       case "vcs" | "glsim" =>
         // Copy API files
         copyVpiFiles(context.targetDir.toString)

src/main/scala/chisel3/iotesters/PeekPokeTesterUtils.scala

@@ -325,11 +325,25 @@ private[iotesters] object verilogToVerilator extends EditableBuildCSimulatorComm
                moreVerilatorFlags: Seq[String] = Seq.empty[String],
                moreVerilatorCFlags: Seq[String] = Seq.empty[String]): (Seq[String], Seq[String]) = {
 
+    val javaHome = System.getProperty("java.home") match {
+      case s: String if s.endsWith("/jre") => s.dropRight(4)
+      case s: String => s
+    }
+    val osIncludeName = System.getProperty("os.name") match {
+      case "Mac OS X" => "darwin"
+      case "Linux" => "linux"
+      case s: String => s
+    }
+
     val ccFlags = Seq(
       "-Wno-undefined-bool-conversion",
       "-O1",
       s"-DTOP_TYPE=V$topModule",
       "-DVL_USER_FINISH",
+      "-fPIC",
+      "-shared",
+      s"-I$javaHome/include",
+      s"-I$javaHome/include/$osIncludeName",
       s"-include V$topModule.h"
     ) ++ moreVerilatorCFlags
 
@@ -385,6 +399,45 @@ private[iotesters] case class BackendException(b: String)
 private[iotesters] case class TestApplicationException(exitVal: Int, lastMessage: String)
   extends RuntimeException(lastMessage)
 
+
+class TesterSharedLib(libPath: String) {
+  Predef.printf(s"TesterSharedLib: loading $libPath ")
+  try {
+    System.load(new File(libPath).getCanonicalPath())
+    println(" ok")
+  } catch {
+    case e: Throwable =>
+      println(" failed: " + e.toString)
+      throw e
+  }
+
+  private val state: Long = 0
+
+  @native private def sim_init(): Unit
+  @native def reset(): Unit
+  @native def step(): Unit
+  @native def update(): Unit
+  @native def poke(id: Int, value: Int): Unit
+  @native def peek(id: Int): Int
+  @native def force(): Unit
+  @native def getid(path: String): Int
+  @native def getchk(id: Int): Int
+  @native def finish(): Unit
+  @native def start(): Unit
+
+  println(s"State before: $state")
+  sim_init()
+  println(s"State after: $state")
+}
+
+private[iotesters] object TesterSharedLib {
+  def apply(cmd: Seq[String], logs: ArrayBuffer[String]): TesterSharedLib = {
+
+    require(new java.io.File(cmd.head + ".dylib").exists, s"${cmd.head}.dylib doesn't exist")
+    new TesterSharedLib(cmd.head + ".dylib")
+  }
+}
+
 private[iotesters] object TesterProcess {
   def apply(cmd: Seq[String], logs: ArrayBuffer[String]): Process = {
     require(new java.io.File(cmd.head).exists, s"${cmd.head} doesn't exist")
@@ -393,8 +446,8 @@ private[iotesters] object TesterProcess {
     processBuilder run processLogger
   }
   def kill(sim: SimApiInterface) {
-    while(!sim.exitValue.isCompleted) sim.process.destroy
-    println("Exit Code: %d".format(sim.process.exitValue))
+    // while(!sim.exitValue.isCompleted) sim.process.destroy
+    // println("Exit Code: %d".format(sim.process.exitValue))
   }
   def kill(p: IVLBackend) {
     kill(p.simApiInterface)