[nix] add derivation for vcs artifacts

nix/pkgs/vcs-fhs-env.nix

@@ -6,8 +6,8 @@ buildFHSEnv {
   name = "vcs-fhs-env";
 
   profile = ''
-    [ ! -d "${vcStaticHome}"  ] && echo "VC HOME not set" && exit 1
-    [ -z "${snpslmdLicenseFile}"  ] && echo "SNPS LICENSE not set" && exit 1
+    [ ! -d "${vcStaticHome}"  ] && echo "env VC_STATIC_HOME not set" && exit 1
+    [ -z "${snpslmdLicenseFile}"  ] && echo "env SNPS LICENSE not set" && exit 1
     export VC_STATIC_HOME=${vcStaticHome}
 
     export TCL_TZ=UTC

nix/t1/default.nix

@@ -51,7 +51,9 @@ lib.makeScope newScope
         elaborateConfigJson = configPath;
         elaborateConfig = builtins.fromJSON (lib.readFile configPath);
 
-        cases = innerSelf.callPackage ../../tests { verilator-emu = ip.verilator-emu; verilator-emu-trace = ip.verilator-emu-trace; };
+        cases = innerSelf.callPackage ../../tests {
+          inherit (ip) verilator-emu verilator-emu-trace vcs-emu-trace;
+        };
 
         # for the convenience to use x86 cases on non-x86 machines, avoiding the extra build time
         cases-x86 =
@@ -117,8 +119,8 @@ lib.makeScope newScope
           };
           vcs-dpi-lib = innerSelf.callPackage ../../difftest/online_vcs { };
           vcs-dpi-lib-trace = vcs-dpi-lib.override { enable-trace = true; };
-          vcs-emu-compiled = innerSelf.callPackage ./vcs.nix { inherit vcs-dpi-lib; rtl = vcs-emu-rtl; };
-          vcs-emu-compiled-trace = innerSelf.callPackage ./vcs.nix { vcs-dpi-lib = vcs-dpi-lib-trace; rtl = vcs-emu-rtl; };
+          vcs-emu = innerSelf.callPackage ./vcs.nix { inherit vcs-dpi-lib; rtl = vcs-emu-rtl; };
+          vcs-emu-trace = innerSelf.callPackage ./vcs.nix { vcs-dpi-lib = vcs-dpi-lib-trace; rtl = vcs-emu-rtl; };
         };
 
         subsystem = rec {

nix/t1/vcs.nix

@@ -39,6 +39,7 @@ stdenv.mkDerivation {
 
   passthru = {
     inherit (vcs-dpi-lib) enable-trace;
+    inherit vcs-fhs-env;
   };
 
   shellHook = ''

tests/default.nix

@@ -6,6 +6,7 @@
 , runCommand
 , verilator-emu
 , verilator-emu-trace
+, vcs-emu-trace
 }:
 
 let
@@ -20,7 +21,7 @@ let
   scope = lib.recurseIntoAttrs (lib.makeScope newScope (casesSelf: {
     recurseForDerivations = true;
 
-    inherit verilator-emu verilator-emu-trace;
+    inherit xLen vLen isFp verilator-emu verilator-emu-trace vcs-emu-trace;
 
     makeEmuResult = casesSelf.callPackage ./make-emu-result.nix { };
 
@@ -48,8 +49,6 @@ let
 
     stdenv = rv32-stdenv;
 
-    inherit xLen vLen isFp;
-
     mlir = casesSelf.callPackage ./mlir { };
     intrinsic = casesSelf.callPackage ./intrinsic { };
     asm = casesSelf.callPackage ./asm { };

tests/make-emu-result.nix

@@ -5,6 +5,7 @@
 , zstd
 , verilator-emu
 , verilator-emu-trace
+, vcs-emu-trace
 , elaborateConfigJson
 }:
 
@@ -28,6 +29,7 @@ let
       "--log-level"
       "ERROR"
     ];
+    rtlEventOutPath = "${placeholder "out"}/${testCase.pname}-rtl-event.jsonl";
 
     buildPhase = ''
       runHook preBuild
@@ -36,7 +38,7 @@ let
 
       echo "[nix] Running test case ${testCase.pname} with args $difftestArgs"
 
-      RUST_BACKTRACE=full "$difftestDriver" $difftestArgs 2> $out/rtl-event.jsonl
+      RUST_BACKTRACE=full "$difftestDriver" $difftestArgs 2> "$rtlEventOutPath"
 
       echo "[nix] online driver done"
 
@@ -47,15 +49,15 @@ let
     checkPhase = ''
       runHook preCheck
 
-      if [ ! -r $out/rtl-event.jsonl ]; then
-        echo -e "[nix] \033[0;31mInternal Error\033[0m: no rtl-event.jsonl found in output"
+      if [ ! -r "$rtlEventOutPath" ]; then
+        echo -e "[nix] \033[0;31mInternal Error\033[0m: no $rtlEventOutPath found in output"
         exit 1
       fi
 
-      if ! jq --stream -c -e '.[]' "$out/rtl-event.jsonl" >/dev/null 2>&1; then
-        echo -e "[nix] \033[0;31mInternal Error\033[0m: invalid JSON file rtl-event.jsonl, showing original file:"
+      if ! jq --stream -c -e '.[]' "$rtlEventOutPath" >/dev/null 2>&1; then
+        echo -e "[nix] \033[0;31mInternal Error\033[0m: invalid JSON file $rtlEventOutPath, showing original file:"
         echo "--------------------------------------------"
-        cat $out/rtl-event.jsonl
+        cat $rtlEventOutPath
         echo "--------------------------------------------"
         exit 1
       fi
@@ -67,17 +69,20 @@ let
       runHook preInstall
 
       echo "[nix] compressing event log"
-      zstd $out/rtl-event.jsonl -o $out/rtl-event.jsonl.zstd
-      rm $out/rtl-event.jsonl
+      zstd $rtlEventOutPath -o $rtlEventOutPath.zstd
+      rm $rtlEventOutPath
 
-      mv perf.txt $out/
+      if [ -r perf.txt ]; then
+        mv perf.txt $out/
+      fi
 
       runHook postInstall
     '';
 
     passthru.with-trace = self.overrideAttrs (old: {
-      difftestDriver = "${verilator-emu-trace}/bin/online_drive";
-      difftestArgs = old.difftestArgs ++ [ "--wave-path" "${placeholder "out"}/wave.fst" ];
+      name = old.name + "-with-trace";
+      emuDriver = "${verilator-emu-trace}/bin/online_drive";
+      emuDriverArgs = old.emuDriverArgs ++ [ "--wave-path" "${placeholder "out"}/wave.fst" ];
       postCheck = ''
         if [ ! -r "$out/wave.fst" ]; then
           echo -e "[nix] \033[0;31mInternal Error\033[0m: waveform not found in output"
@@ -87,16 +92,45 @@ let
     });
 
     passthru.with-offline = self.overrideAttrs (old: {
+      name = old.name + "-with-offline";
       preInstall = ''
         set +e
         "${verilator-emu}/bin/offline" \
           --elf-file ${testCase}/bin/${testCase.pname}.elf \
-          --log-file $out/rtl-event.jsonl \
+          --log-file $rtlEventOutPath \
           --log-level ERROR &> $out/offline-check-journal
         printf "$?" > $out/offline-check-status
         set -e
       '';
     });
+
+    passthru.with-vcs = self.overrideAttrs (old: {
+      name = old.name + "-with-vcs";
+      __noChroot = true;
+      buildPhase = ''
+        runHook preBuild
+
+        mkdir -p "$out"
+        echo "[nix] Running VCS for ${testCase.pname}"
+
+        RUST_BACKTRACE=full "${vcs-emu-trace}/bin/t1-vcs-simulator" \
+          --elf-file ${testCase}/bin/${testCase.pname}.elf \
+          --wave-path ${testCase.pname}.fsdb \
+          1> /dev/null \
+          2> $rtlEventOutPath
+
+        echo "[nix] VCS emu done"
+
+        runHook postBuild
+      '';
+
+      postInstall = ''
+        # VCS have weird behavior on file creation, it will report read-only filesystem on our output,
+        # while other tools can mutate file system correctly.
+        cp ${testCase.pname}.fsdb "$out"
+        cp -r ${vcs-emu-trace}/lib/t1-vcs-simulator.daidir "$out"
+      '';
+    });
   };
 in
 self