mirror of
https://github.com/dart-lang/sdk
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e0e14c370a
TEST=build Change-Id: I1a01702451f1be91f14c3a860fa3f84b0c686409 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292062 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
205 lines
6.4 KiB
C++
205 lines
6.4 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(DART_HOST_OS_MACOS)
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#include "platform/utils.h"
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#include "platform/utils_macos.h"
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#include <errno.h> // NOLINT
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#include <sys/utsname.h> // NOLINT
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namespace dart {
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char* Utils::StrNDup(const char* s, intptr_t n) {
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// strndup has only been added to Mac OS X in 10.7. We are supplying
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// our own copy here if needed.
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#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
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__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ <= 1060
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intptr_t len = strlen(s);
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if ((n < 0) || (len < 0)) {
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return nullptr;
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}
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if (n < len) {
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len = n;
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}
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char* result = reinterpret_cast<char*>(malloc(len + 1));
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result[len] = '\0';
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return reinterpret_cast<char*>(memmove(result, s, len));
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#else // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
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return strndup(s, n);
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#endif // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
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}
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char* Utils::StrDup(const char* s) {
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return strdup(s);
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}
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intptr_t Utils::StrNLen(const char* s, intptr_t n) {
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// strnlen has only been added to Mac OS X in 10.7. We are supplying
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// our own copy here if needed.
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#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
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__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ <= 1060
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intptr_t len = 0;
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while ((len <= n) && (*s != '\0')) {
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s++;
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len++;
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}
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return len;
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#else // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
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return strnlen(s, n);
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#endif // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
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}
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int Utils::SNPrint(char* str, size_t size, const char* format, ...) {
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va_list args;
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va_start(args, format);
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int retval = VSNPrint(str, size, format, args);
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va_end(args);
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return retval;
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}
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int Utils::VSNPrint(char* str, size_t size, const char* format, va_list args) {
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int retval = vsnprintf(str, size, format, args);
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if (retval < 0) {
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FATAL("Fatal error in Utils::VSNPrint with format '%s'", format);
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}
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return retval;
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}
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int Utils::Close(int fildes) {
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return close(fildes);
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}
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size_t Utils::Read(int filedes, void* buf, size_t nbyte) {
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return read(filedes, buf, nbyte);
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}
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int Utils::Unlink(const char* path) {
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return unlink(path);
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}
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namespace internal {
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// Returns the running system's Darwin major version. Don't call this, it's
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// an implementation detail and its result is meant to be cached by
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// MacOSXMinorVersion.
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int32_t DarwinMajorVersionInternal() {
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// uname is implemented as a simple series of sysctl system calls to
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// obtain the relevant data from the kernel. The data is
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// compiled right into the kernel, so no threads or blocking or other
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// funny business is necessary.
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struct utsname uname_info;
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if (uname(&uname_info) != 0) {
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FATAL("Fatal error in DarwinMajorVersionInternal : invalid return uname");
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return 0;
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}
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if (strcmp(uname_info.sysname, "Darwin") != 0) {
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FATAL(
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"Fatal error in DarwinMajorVersionInternal : unexpected uname"
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" sysname '%s'",
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uname_info.sysname);
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return 0;
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}
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int32_t darwin_major_version = 0;
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char* dot = strchr(uname_info.release, '.');
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if (dot) {
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errno = 0;
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char* end_ptr = nullptr;
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darwin_major_version = strtol(uname_info.release, &end_ptr, 10);
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if (errno != 0 || (end_ptr == uname_info.release)) {
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dot = nullptr;
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}
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}
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if (!dot) {
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FATAL(
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"Fatal error in DarwinMajorVersionInternal :"
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" could not parse uname release '%s'",
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uname_info.release);
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return 0;
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}
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return darwin_major_version;
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}
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// Returns the running system's Mac OS X version which matches the encoding
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// of MAC_OS_X_VERSION_* defines in AvailabilityMacros.h
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int32_t MacOSXVersionInternal() {
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const int32_t darwin_major_version = DarwinMajorVersionInternal();
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int32_t major_version;
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int32_t minor_version;
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if (darwin_major_version < 20) {
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// For Mac OS X 10.* minor version is off by 4 from Darwin's major
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// version, e.g. 5.* is v10.1.*, 6.* is v10.2.* and so on.
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// Pretend that anything below Darwin v5 is just Mac OS X Cheetah (v10.0).
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major_version = 10;
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minor_version = Utils::Maximum(0, darwin_major_version - 4);
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} else {
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// Starting from Darwin v20 major version increment in lock-step:
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// Darwin v20 - Mac OS X v11, Darwin v21 - Mac OS X v12, etc
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major_version = (darwin_major_version - 9);
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minor_version = 0;
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}
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// Caveat: MAC_OS_X_VERSION_* is encoded using decimal encoding.
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// Starting at MAC_OS_X_VERSION_10_10 versions use 2 decimal digits for
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// minor version and patch number.
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const int32_t field_multiplier = (darwin_major_version < 14) ? 10 : 100;
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const int32_t major_multiplier = field_multiplier * field_multiplier;
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const int32_t minor_multiplier = field_multiplier;
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return major_version * major_multiplier + minor_version * minor_multiplier;
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}
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int32_t MacOSXVersion() {
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static int mac_os_x_version = MacOSXVersionInternal();
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return mac_os_x_version;
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}
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} // namespace internal
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namespace {
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int32_t MacOSMinorVersion(int32_t version) {
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// Caveat: MAC_OS_X_VERSION_* is encoded using decimal encoding.
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// Starting at MAC_OS_X_VERSION_10_10 versions use 2 decimal digits for
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// minor version and patch number.
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const int32_t field_multiplier =
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(version < MAC_OS_X_VERSION_10_10) ? 10 : 100;
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return (version / field_multiplier) % field_multiplier;
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}
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int32_t MacOSMajorVersion(int32_t version) {
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// Caveat: MAC_OS_X_VERSION_* is encoded using decimal encoding.
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// Starting at MAC_OS_X_VERSION_10_10 versions use 2 decimal digits for
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// minor version and patch number.
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const int32_t field_multiplier =
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(version < MAC_OS_X_VERSION_10_10) ? 10 : 100;
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return version / (field_multiplier * field_multiplier);
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}
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} // namespace
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char* CheckIsAtLeastMinRequiredMacOSVersion() {
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const int32_t current_version = internal::MacOSXVersion();
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if (current_version >= MAC_OS_X_VERSION_MIN_REQUIRED) {
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return nullptr;
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}
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return Utils::SCreate(
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"Current Mac OS X version %d.%d is lower than minimum supported version "
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"%d.%d",
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MacOSMajorVersion(current_version), MacOSMinorVersion(current_version),
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MacOSMajorVersion(MAC_OS_X_VERSION_MIN_REQUIRED),
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MacOSMinorVersion(MAC_OS_X_VERSION_MIN_REQUIRED));
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}
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} // namespace dart
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#endif // defined(DART_HOST_OS_MACOS)
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