Refactor Subzero initialization and add a browser callback handler.

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LLVM_BIN_PATH=<path> \
 #        LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> \
-#        BINUTILS_BIN_PATH=<path> ...
+#        PNACL_BIN_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
 # directories of LLVM, Clang in tools/clang/, etc.
 # Alternatively, if you're building vs. a binary download of LLVM, then
 # LLVM_SRC_PATH can point to the main untarred directory.
 LLVM_SRC_PATH ?= ../llvm
 
 # LLVM_BIN_PATH is the directory where binaries are placed by the LLVM build
 # process. It should contain the tools like clang, clang-format, llc,
 # llvm-as, llvm-config, llvm-mc, pnacl-bcdis, and pnacl-freeze.
 # It also contains developer libraries like libLLVMSupport.a.
 # The default reflects a configure + make build.
 LLVM_BIN_PATH ?= $(shell readlink -e \
         ../../out/llvm_x86_64_linux_work/Release+Asserts/bin)
 
+# The x86-32-specific sandboxed translator directory.
+# It holds sandboxed versions of libraries and binaries.
+SB_LLVM_PATH ?= $(shell readlink -e \
+        ../../out/sandboxed_translators_work/translator-i686/llvm-sb/Release)
+
+# NACL_ROOT is the root of the native client repository.
+NACL_ROOT ?= $(shell python -c "import sys; sys.path.insert(0, 'pydir'); \
+        import utils; print utils.FindBaseNaCl()")
+
 # PNACL_TOOLCHAIN_ROOT is the location of the PNaCl toolchain.
 # This is used as the default root for finding binutils, libcxx, etc.
-PNACL_TOOLCHAIN_ROOT = $(shell readlink -e \
-        ../../../toolchain/linux_x86/pnacl_newlib)
+PNACL_TOOLCHAIN_ROOT ?= $(shell readlink -e \
+        $(NACL_ROOT)/toolchain/linux_x86/pnacl_newlib)
+
+# The location of PNaCl tools (e.g., binutils objdump, pnacl-clang++, etc.).
+PNACL_BIN_PATH ?= $(shell readlink -e $(PNACL_TOOLCHAIN_ROOT)/bin)
 
 # CLANG_PATH is the location of the clang compiler to use for building
 # the host binaries.
 CLANG_PATH ?= $(shell readlink -e \
-        ../../../../third_party/llvm-build/Release+Asserts/bin)
+        $(NACL_ROOT)/../third_party/llvm-build/Release+Asserts/bin)
 
 # LIBCXX_INSTALL_PATH is the directory where libc++ is located. It should
 # contain header files and corresponding libraries. This is used for
 # building the host binaries in conjuction with clang.
 LIBCXX_INSTALL_PATH ?= $(PNACL_TOOLCHAIN_ROOT)
 
-# The location of binutils tools (e.g., objdump) for testing.
-BINUTILS_BIN_PATH ?= $(shell readlink -e $(PNACL_TOOLCHAIN_ROOT)/bin)
-
 HOST_ARCH ?= x86_64
 ifeq ($(HOST_ARCH),x86_64)
   HOST_FLAGS = -m64 -stdlib=libc++
 else
   ifeq ($(HOST_ARCH),x86)
     HOST_FLAGS = -m32 -stdlib=libc++
   endif
 endif
 
 ifdef DEBUG
   OBJDIR = build/Debug
   OPTLEVEL = -O0
+  LINKOPTLEVEL = -O0
 else
   OBJDIR = build/Release
   OPTLEVEL = -O2 -ffunction-sections -fdata-sections
+  LINKOPTLEVEL = -O2
 endif
 
 # The list of CXX defines that are dependent on build parameters.
-CXX_DEFINES =
+BASE_CXX_DEFINES =
 CXX_EXTRA =
 LD_EXTRA =
 
 ifdef MINIMAL
   NOASSERT = 1
   OBJDIR := $(OBJDIR)+Min
-  CXX_DEFINES += -DALLOW_DUMP=0 -DALLOW_LLVM_CL=0 -DALLOW_LLVM_IR=0 \
+  BASE_CXX_DEFINES += -DALLOW_DUMP=0 -DALLOW_LLVM_CL=0 -DALLOW_LLVM_IR=0 \
         -DALLOW_LLVM_IR_AS_INPUT=0 -DALLOW_DISABLE_IR_GEN=0 \
-        -DALLOW_MINIMAL_BUILD=1
+    -DALLOW_MINIMAL_BUILD=1
 else
-  CXX_DEFINES += -DALLOW_DUMP=1 -DALLOW_LLVM_CL=1 -DALLOW_LLVM_IR=1 \
+  BASE_CXX_DEFINES += -DALLOW_DUMP=1 -DALLOW_LLVM_CL=1 -DALLOW_LLVM_IR=1 \
         -DALLOW_LLVM_IR_AS_INPUT=1 -DALLOW_DISABLE_IR_GEN=1 \
-        -DALLOW_MINIMAL_BUILD=0
+    -DALLOW_MINIMAL_BUILD=0
 endif
 
+SB_CXX_DEFINES := $(BASE_CXX_DEFINES) -DPNACL_BROWSER_TRANSLATOR=1
+CXX_DEFINES := $(BASE_CXX_DEFINES) -DPNACL_BROWSER_TRANSLATOR=0
+
 ifdef NOASSERT
   ASSERTIONS = -DNDEBUG
 else
   ASSERTIONS =
   OBJDIR := $(OBJDIR)+Asserts
 endif
 
 ifdef TSAN
   OBJDIR := $(OBJDIR)+TSan
   CXX_EXTRA += -fsanitize=thread
   LD_EXTRA += -fsanitize=thread
 endif
 
+SB_OBJDIR := $(OBJDIR)+Sandboxed
+
 $(info -----------------------------------------------)
 $(info Using LLVM_SRC_PATH = $(LLVM_SRC_PATH))
 $(info Using LLVM_BIN_PATH = $(LLVM_BIN_PATH))
+$(info Using SB_LLVM_PATH = $(SB_LLVM_PATH))
+$(info Using NACL_ROOT = $(NACL_ROOT))
 $(info Using PNACL_TOOLCHAIN_ROOT = $(PNACL_TOOLCHAIN_ROOT))
+$(info Using PNACL_BIN_PATH = $(PNACL_BIN_PATH))
 $(info Using CLANG_PATH = $(CLANG_PATH))
 $(info Using LIBCXX_INSTALL_PATH = $(LIBCXX_INSTALL_PATH))
-$(info Using BINUTILS_BIN_PATH = $(BINUTILS_BIN_PATH))
 $(info Using HOST_ARCH     = $(HOST_ARCH))
 $(info -----------------------------------------------)
 
 LLVM_CXXFLAGS := `$(LLVM_BIN_PATH)/llvm-config --cxxflags`
-LLVM_LDFLAGS := `$(LLVM_BIN_PATH)/llvm-config --libs` \
+SB_LLVM_CXXFLAGS := $(LLVM_CXXFLAGS)
+
+# Listing specific libraries that are needed for pnacl-sz
+# and the unittests, since we build "tools-only" for the
+# sandboxed_translators (which doesn't include every library
+# listed by llvm-config).
+LLVM_LIBS := -lLLVMIRReader -lLLVMBitReader -lLLVMNaClBitTestUtils \
+        -lLLVMNaClBitReader -lLLVMNaClBitAnalysis -lLLVMNaClBitWriter \
+        -lLLVMAsmParser -lLLVMNaClAnalysis -lLLVMCore -lLLVMSupport
+LLVM_LDFLAGS := $(LLVM_LIBS) \
                 `$(LLVM_BIN_PATH)/llvm-config --ldflags` \
                 `$(LLVM_BIN_PATH)/llvm-config --system-libs`
+SB_LLVM_LDFLAGS := $(LLVM_LIBS) \
+                   -L$(SB_LLVM_PATH)/lib
 
-# It's recommended that CXX matches the compiler you used to build LLVM itself.
 CCACHE := `command -v ccache`
 CXX := CCACHE_CPP2=yes $(CCACHE) $(CLANG_PATH)/clang++
+SB_CXX := CCACHE_CPP2=yes $(CCACHE) $(PNACL_BIN_PATH)/pnacl-clang++
+SB_TRANSLATE := $(PNACL_BIN_PATH)/pnacl-translate
 
-CXXFLAGS := $(LLVM_CXXFLAGS) -std=gnu++11 -Wall -Wextra -Werror -fno-rtti \
-        -fno-exceptions $(OPTLEVEL) $(ASSERTIONS) $(CXX_DEFINES) -g \
-        $(HOST_FLAGS) -pedantic -Wno-error=unused-parameter \
-        -I$(LIBCXX_INSTALL_PATH)/include/c++/v1 $(CXX_EXTRA)
+BASE_CXXFLAGS := -std=gnu++11 -Wall -Wextra -Werror -fno-rtti \
+        -fno-exceptions $(OPTLEVEL) $(ASSERTIONS) -g -pedantic \
+        -Wno-error=unused-parameter $(CXX_EXTRA)
+
+CXXFLAGS := $(LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(CXX_DEFINES) $(HOST_FLAGS) \
+        -I$(LIBCXX_INSTALL_PATH)/include/c++/v1
+SB_CXXFLAGS := $(SB_LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(SB_CXX_DEFINES)
+
 LDFLAGS := $(HOST_FLAGS) -L$(LIBCXX_INSTALL_PATH)/lib -Wl,--gc-sections \
         $(LD_EXTRA)
+# Not specifying -Wl,--gc-sections but instead doing bitcode linking GC w/ LTO.
+SB_LDFLAGS := $(LINKOPTLEVEL) $(LD_EXTRA)
 
 SRCS = \
         assembler.cpp \
         assembler_ia32.cpp \
+        IceBrowserCompileServer.cpp \
         IceCfg.cpp \
         IceCfgNode.cpp \
+        IceClFlags.cpp \
+        IceCompiler.cpp \
+        IceCompileServer.cpp \
         IceELFObjectWriter.cpp \
         IceELFSection.cpp \
         IceFixups.cpp \
         IceGlobalContext.cpp \
         IceGlobalInits.cpp \
         IceInst.cpp \
         IceInstX8632.cpp \
         IceIntrinsics.cpp \
         IceLiveness.cpp \
         IceOperand.cpp \
         IceRegAlloc.cpp \
         IceRNG.cpp \
         IceTargetLowering.cpp \
         IceTargetLoweringX8632.cpp \
         IceThreading.cpp \
         IceTimerTree.cpp \
         IceTranslator.cpp \
         IceTypes.cpp \
         main.cpp \
         PNaClTranslator.cpp
 
 ifndef MINIMAL
   SRCS += IceConverter.cpp \
         IceTypeConverter.cpp
 endif
 
 OBJS=$(patsubst %.cpp, $(OBJDIR)/%.o, $(SRCS))
+SB_OBJS=$(patsubst %.cpp, $(SB_OBJDIR)/%.o, $(SRCS))
 
 UNITTEST_SRCS = \
         BitcodeMunge.cpp \
         IceELFSectionTest.cpp \
         IceParseInstsTest.cpp
 
 UNITTEST_OBJS = $(patsubst %.cpp, $(OBJDIR)/unittest/%.o, $(UNITTEST_SRCS))
 UNITTEST_LIB_OBJS = $(filter-out $(OBJDIR)/main.o,$(OBJS))
 
 # Keep all the first target so it's the default.
 all: $(OBJDIR)/pnacl-sz make_symlink runtime
 
+ifdef TSAN
+sb:
+        @echo "Skipping pnacl-sz.*.nexe: TSAN isn't supported under NaCl."
+else
+sb: $(SB_OBJDIR)/pnacl-sz.x86-32.nexe
+endif
+
 # Creates symbolic link so that testing is easier. Also runs
 # pnacl-sz to verify that the defines flags have valid values,
 # as well as describe the corresponding build attributes.
 make_symlink: $(OBJDIR)/pnacl-sz
         rm -rf pnacl-sz
         ln -s $(OBJDIR)/pnacl-sz
         @echo "Build Attributes:"
         @$(OBJDIR)/pnacl-sz --build-atts
 
-.PHONY: all make_symlink runtime bloat
+.PHONY: all make_symlink runtime bloat sb
 
 $(OBJDIR)/pnacl-sz: $(OBJS)
         $(CXX) $(LDFLAGS) -o $@ $^ $(LLVM_LDFLAGS) \
                -Wl,-rpath=$(abspath $(LIBCXX_INSTALL_PATH)/lib)
 
+$(SB_OBJDIR)/pnacl-sz.x86-32.nexe: $(SB_OBJS)
+        $(eval PNACL_SZ_BASE := $(patsubst %.nexe, %, $@))
+        $(SB_CXX) $(SB_LDFLAGS) -o $(PNACL_SZ_BASE).nonfinal.pexe $^ \
+                $(SB_LLVM_LDFLAGS)
+        $(SB_TRANSLATE) -arch x86-32 $(PNACL_SZ_BASE).nonfinal.pexe -o $@ \
+                --allow-llvm-bitcode-input
+
 # TODO(stichnot): Be more precise than "*.h" here and elsewhere.
 $(OBJS): $(OBJDIR)/%.o: src/%.cpp src/*.h src/*.def
         $(CXX) -c $(CXXFLAGS) $< -o $@
 
+$(SB_OBJS): $(SB_OBJDIR)/%.o: src/%.cpp src/*.h src/*.def
+        $(SB_CXX) -c $(SB_CXXFLAGS) $< -o $@
+
 $(OBJDIR)/run_unittests: $(UNITTEST_OBJS) $(UNITTEST_LIB_OBJS)
         $(CXX) $(LDFLAGS) -o $@ $^ $(LLVM_LDFLAGS) -lgtest -lgtest_main -ldl \
                -Wl,-rpath=$(abspath $(LIBCXX_INSTALL_PATH)/lib)
 
 $(UNITTEST_OBJS): $(OBJDIR)/unittest/%.o: unittest/%.cpp \
                 unittest/*.h src/*.h src/*.def
         $(CXX) -c $(CXXFLAGS) \
                 -Isrc/ \
                 -I$(LLVM_SRC_PATH)/utils/unittest/googletest/include \
                 -DGTEST_HAS_RTTI=0 -DGTEST_USE_OWN_TR1_TUPLE \
                 $< -o $@
 
 $(OBJS): | $(OBJDIR)
+$(SB_OBJS): | $(SB_OBJDIR)
 
 $(UNITTEST_OBJS): | $(OBJDIR)/unittest
 
 $(OBJDIR):
         @mkdir -p $@
+$(SB_OBJDIR):
+        @mkdir -p $@
 
 $(OBJDIR)/unittest: $(OBJDIR)
         @mkdir -p $@
 
 RT_SRC := runtime/szrt.c runtime/szrt_ll.ll
 RT_OBJ := build/runtime/szrt_native_x8632.o build/runtime/szrt_sb_x8632.o
 
 runtime: $(RT_OBJ)
 
 # Use runtime.is.built so that build-runtime.py is invoked only once
 # even in a parallel build.
 .INTERMEDIATE: runtime.is.built
 $(RT_OBJ): runtime.is.built
 runtime.is.built: $(RT_SRC)
         @echo ================ Building Subzero runtime ================
         ./pydir/build-runtime.py -v --pnacl-root $(PNACL_TOOLCHAIN_ROOT)
 
 check-lit: $(OBJDIR)/pnacl-sz make_symlink
         LLVM_BIN_PATH=$(LLVM_BIN_PATH) \
-        BINUTILS_BIN_PATH=$(BINUTILS_BIN_PATH) \
+        BINUTILS_BIN_PATH=$(PNACL_BIN_PATH) \
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv tests_lit
 
 ifdef MINIMAL
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
         @echo "Crosstests disabled, minimal build"
 else
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
        # Do all native/sse2 tests, but only test_vector_ops for native/sse4.1.
        # For (slow) sandboxed tests, limit to Om1/sse4.1.
         ./pydir/crosstest_generator.py -v --lit \
@@ skipping 20 matching lines @@
         PATH=$(LLVM_BIN_PATH):$(PATH) \
         $(LLVM_SRC_PATH)/../clang/tools/clang-format/clang-format-diff.py \
         -p1 -style=LLVM -i
 
 bloat: make_symlink
         nm -C -S -l pnacl-sz | \
         bloat/bloat.py --nm-output=/dev/stdin syms > build/pnacl-sz.bloat.json
         @echo See Subzero size breakdown in bloat/pnacl-sz.bloat.html
 
 clean:
-        rm -rf pnacl-sz *.o $(OBJDIR) build/pnacl-sz.bloat.json
+        rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
         rm -rf build/