Rollback debug specific changes to build files

BUILD.gn

@@ -31,13 +31,34 @@ config("swiftshader_config") {
       "NOMINMAX",
       "_WINDLL",
       "NO_SANITIZE_FUNCTION=",
-      "ANGLE_DISABLE_TRACE",
     ]
+
+    if (is_debug) {
+      cflags += [ "/RTC1" ]  # Run-Time Error Checks
+    } else {
+      defines += [ "ANGLE_DISABLE_TRACE" ]
+    }
   } else {
     cflags = [
       "-std=c++11",
       "-fno-exceptions",
       "-fno-operator-names",
+    ]
+
+    defines += [
+      "__STDC_CONSTANT_MACROS",
+      "__STDC_LIMIT_MACROS",
+      "NO_SANITIZE_FUNCTION=__attribute__((no_sanitize(\"function\")))",
+    ]
+
+    if (is_debug) {
+      cflags += [
+        "-g",
+        "-g3",
+      ]
+    } else {  # Release
+      # All Release builds use function/data sections to make the shared libraries smaller
+      cflags += [
         "-ffunction-sections",
         "-fdata-sections",
         "-fomit-frame-pointer",
@@ -45,12 +66,10 @@ config("swiftshader_config") {
       ]
 
       defines += [
-      "__STDC_CONSTANT_MACROS",
-      "__STDC_LIMIT_MACROS",
-      "NO_SANITIZE_FUNCTION=__attribute__((no_sanitize(\"function\")))",
         "ANGLE_DISABLE_TRACE",
         "NDEBUG",
       ]
+    }
 
     if (target_cpu == "x64") {  # 64 bit version
       cflags += [

src/OpenGL/libEGL/BUILD.gn

@@ -58,6 +58,10 @@ swiftshader_shared_library("swiftshader_libEGL") {
     "resource.h",
   ]
 
+  if (is_debug) {
+    sources += [ "../common/debug.cpp" ]
+  }
+
   if (is_mac) {
     sources += [ "OSXUtils.mm" ]
     libs = [

src/swiftshader.gni

@@ -12,22 +12,6 @@ if (is_win) {
   configs_to_delete += [ "//build/config/win:unicode" ]
 }
 
-if (is_debug) {
-  # always build release version of SwiftShader for performance reasons
-  configs_to_delete += [
-    "//build/config:debug",
-    "//build/config/compiler:default_optimization",
-  ]
-  configs_to_add += [
-    "//build/config:release",
-    "//build/config/compiler:optimize",
-  ]
-  if (is_win) {
-    configs_to_delete += [ "//build/config/win:default_crt" ]
-    configs_to_add += [ "//build/config/win:release_crt" ]
-  }
-}
-
 configs_to_delete += [ "//build/config/compiler:chromium_code" ]
 configs_to_add += [
   "//build/config/compiler:no_chromium_code",