Bugfix: loadMemoryFromFile support absolute paths

src/main/scala/treadle2/executable/Memory.scala

@@ -653,7 +653,7 @@ class MemoryInitializer(engine: ExecutionEngine) extends LazyLogging {
 private object MemoryFileParser {
   def parse(filename: String, base: Int): Seq[BigInt] = {
     require(base == 16 || base == 2)
-    val fullName = os.pwd / os.RelPath(filename)
+    val fullName = os.Path(filename, base = os.pwd)
     os.read.lines(fullName).flatMap(l => parseLine(l.trim, base))
   }
   private def parseLine(line: String, base: Int): Seq[BigInt] = {

src/test/scala/chiseltest/iotesters/examples/LoadMemoryFromFileSpec.scala

@@ -3,14 +3,14 @@
 package chiseltest.iotesters.examples
 
 import chisel3._
-import chiseltest.iotesters._
 import chisel3.util.experimental.loadMemoryFromFileInline
 import chiseltest._
+import chiseltest.iotesters._
 import chiseltest.simulator.RequiresVerilator
 import firrtl2.options.TargetDirAnnotation
 import org.scalatest.freespec.AnyFreeSpec
 
-class UsesMem(memoryDepth: Int, memoryType: Bits) extends Module {
+class UsesMem(memoryDepth: Int, memoryType: Bits, fileName: String) extends Module {
   val io = IO(new Bundle {
     val address = Input(UInt(memoryType.getWidth.W))
     val value = Output(memoryType)
@@ -19,7 +19,7 @@ class UsesMem(memoryDepth: Int, memoryType: Bits) extends Module {
 
   val memory = Mem(memoryDepth, memoryType)
 
-  loadMemoryFromFileInline(memory, "src/test/resources/iotesters/mem1.txt")
+  loadMemoryFromFileInline(memory, fileName)
 
   io.value := memory(io.address)
 
@@ -28,6 +28,9 @@ class UsesMem(memoryDepth: Int, memoryType: Bits) extends Module {
   low.io.address := io.address
   io.value2 := low.io.value
 }
+object UsesMem {
+  val Mem1 = "src/test/resources/iotesters/mem1.txt"
+}
 
 class UsesMemLow(memoryDepth: Int, memoryType: Data) extends Module {
   val io = IO(new Bundle {
@@ -56,8 +59,21 @@ class LoadMemoryFromFileSpec extends AnyFreeSpec with ChiselScalatestTester {
   "Users can specify a source file to load memory from" taggedAs RequiresVerilator in {
 
     val targetDir = TargetDirAnnotation("test_run_dir/load_mem_test")
-    test(new UsesMem(memoryDepth = 8, memoryType = UInt(16.W)))
+    test(new UsesMem(memoryDepth = 8, memoryType = UInt(16.W), "src/test/resources/iotesters/mem1.txt"))
       .withAnnotations(Seq(VerilatorBackendAnnotation, targetDir))
       .runPeekPoke(new LoadMemoryFromFileTester(_))
   }
+
+  "Treadle supports loadFromFileInline using absolute paths" in {
+    // An absolute path
+    val path: os.Path = os.pwd / os.RelPath(UsesMem.Mem1)
+    test(new UsesMem(memoryDepth = 8, memoryType = UInt(16.W), path.toString()))
+      .runPeekPoke(new LoadMemoryFromFileTester(_))
+  }
+
+  "Treadle also supports loadFromFileInline using relative paths" in {
+    // An absolute path
+    test(new UsesMem(memoryDepth = 8, memoryType = UInt(16.W), UsesMem.Mem1))
+      .runPeekPoke(new LoadMemoryFromFileTester(_))
+  }
 }