# -*- Python -*-

import os
import platform
import re

import lit.formats


def get_required_attr(config, attr_name):
    attr_value = getattr(config, attr_name, None)
    if attr_value == None:
        lit_config.fatal(
            "No attribute %r in test configuration! You may need to run "
            "tests from your build directory or add this attribute "
            "to lit.site.cfg.py " % attr_name
        )
    return attr_value


# Setup config name.
config.name = "MemProfiler" + config.name_suffix

# Platform-specific default MEMPROF_OPTIONS for lit tests.
default_memprof_opts = list(config.default_sanitizer_opts)

default_memprof_opts_str = ":".join(default_memprof_opts)
if default_memprof_opts_str:
    config.environment["MEMPROF_OPTIONS"] = default_memprof_opts_str
    default_memprof_opts_str += ":"
config.substitutions.append(
    ("%env_memprof_opts=", "env MEMPROF_OPTIONS=" + default_memprof_opts_str)
)

# Setup source root.
config.test_source_root = os.path.dirname(__file__)

libdl_flag = "-ldl"

# Setup default compiler flags used with -fmemory-profile option.
# FIXME: Review the set of required flags and check if it can be reduced.
target_cflags = [get_required_attr(config, "target_cflags")]
target_cxxflags = config.cxx_mode_flags + target_cflags
clang_memprof_static_cflags = (
    [
        "-fmemory-profile",
        "-mno-omit-leaf-frame-pointer",
        "-fno-omit-frame-pointer",
        "-fno-optimize-sibling-calls",
    ]
    + config.debug_info_flags
    + target_cflags
)
clang_memprof_static_cxxflags = config.cxx_mode_flags + clang_memprof_static_cflags

memprof_dynamic_flags = []
if config.memprof_dynamic:
    memprof_dynamic_flags = ["-shared-libsan"]
    config.available_features.add("memprof-dynamic-runtime")
else:
    config.available_features.add("memprof-static-runtime")
clang_memprof_cflags = clang_memprof_static_cflags + memprof_dynamic_flags
clang_memprof_cxxflags = clang_memprof_static_cxxflags + memprof_dynamic_flags


def build_invocation(compile_flags):
    return " " + " ".join([config.clang] + compile_flags) + " "


config.substitutions.append(("%clang ", build_invocation(target_cflags)))
config.substitutions.append(("%clangxx ", build_invocation(target_cxxflags)))
config.substitutions.append(("%clang_memprof ", build_invocation(clang_memprof_cflags)))
config.substitutions.append(
    ("%clangxx_memprof ", build_invocation(clang_memprof_cxxflags))
)
if config.memprof_dynamic:
    shared_libmemprof_path = os.path.join(
        config.compiler_rt_libdir,
        "libclang_rt.memprof{}.so".format(config.target_suffix),
    )
    config.substitutions.append(("%shared_libmemprof", shared_libmemprof_path))
    config.substitutions.append(
        ("%clang_memprof_static ", build_invocation(clang_memprof_static_cflags))
    )
    config.substitutions.append(
        ("%clangxx_memprof_static ", build_invocation(clang_memprof_static_cxxflags))
    )

config.substitutions.append(("%libdl", libdl_flag))

config.available_features.add("memprof-" + config.bits + "-bits")

config.available_features.add("fast-unwinder-works")

# Set LD_LIBRARY_PATH to pick dynamic runtime up properly.
new_ld_library_path = os.path.pathsep.join(
    (config.compiler_rt_libdir, config.environment.get("LD_LIBRARY_PATH", ""))
)
config.environment["LD_LIBRARY_PATH"] = new_ld_library_path

# Default test suffixes.
config.suffixes = [".c", ".cpp"]

config.substitutions.append(("%fPIC", "-fPIC"))
config.substitutions.append(("%fPIE", "-fPIE"))
config.substitutions.append(("%pie", "-pie"))

# Only run the tests on supported OSs.
if config.host_os not in ["Linux"]:
    config.unsupported = True

if not config.parallelism_group:
    config.parallelism_group = "shadow-memory"