am 27b03e62: Merge "Create arch specific cache dirs during zygote startup."

#include <cutils/properties.h>

#include <cutils/trace.h>

#include <android_runtime/AndroidRuntime.h>

#include <private/android_filesystem_config.h>  // for AID_SYSTEM

#include <stdlib.h>

#include <stdio.h>

    return (end - start);

}

static void maybeCreateDalvikCache() {

#if defined(__aarch64__)

    static const char kInstructionSet[] = "arm64";

#elif defined(__x86_64__)

    static const char kInstructionSet[] = "x86_64";

#elif defined(__arm__)

    static const char kInstructionSet[] = "arm";

#elif defined(__x86__)

    static const char kInstructionSet[] = "x86";

#elif defined (__mips__)

    static const char kInstructionSet[] = "mips";

#else

#error "Unknown instruction set"

#endif

    const char* androidRoot = getenv("ANDROID_DATA");

    LOG_ALWAYS_FATAL_IF(androidRoot == NULL, "ANDROID_DATA environment variable unset");

    char dalvikCacheDir[PATH_MAX];

    const int numChars = snprintf(dalvikCacheDir, PATH_MAX,

            "%s/dalvik-cache/%s", androidRoot, kInstructionSet);

    LOG_ALWAYS_FATAL_IF((numChars >= PATH_MAX || numChars < 0),

            "Error constructing dalvik cache : %s", strerror(errno));

    int result = mkdir(dalvikCacheDir, 0771);

    LOG_ALWAYS_FATAL_IF((result < 0 && errno != EEXIST),

            "Error creating cache dir %s : %s", dalvikCacheDir, strerror(errno));

    // We always perform these steps because the directory might

    // already exist, with wider permissions and a different owner

    // than we'd like.

    result = chown(dalvikCacheDir, AID_SYSTEM, AID_SYSTEM);

    LOG_ALWAYS_FATAL_IF((result < 0), "Error changing dalvik-cache ownership : %s", strerror(errno));

    result = chmod(dalvikCacheDir, 0771);

    LOG_ALWAYS_FATAL_IF((result < 0),

            "Error changing dalvik-cache permissions : %s", strerror(errno));

}

#if defined(__LP64__)

static const char ABI_LIST_PROPERTY[] = "ro.product.cpu.abilist64";

static const char ZYGOTE_NICE_NAME[] = "zygote64";

        args.add(application ? String8("application") : String8("tool"));

        runtime.setClassNameAndArgs(className, argc - i, argv + i);

    } else {

        // We're in zygote mode.

        maybeCreateDalvikCache();

        if (startSystemServer) {

            args.add(String8("start-system-server"));

        }