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Test for snapshot support in V8

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Looks like we have to test for internal functions unfortunately
since the public V8 snapshot API is available no matter whether
the library really supports it or not.
This commit is contained in:
Stefan Siegl 2016-02-28 17:48:44 +01:00
parent b405a34690
commit 39062b4248
2 changed files with 55 additions and 0 deletions
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48
config.m4
View File

@ -130,6 +130,54 @@ int main ()
AC_MSG_ERROR([could not determine libv8 version]) AC_MSG_ERROR([could not determine libv8 version])
fi fi
AC_MSG_CHECKING([for v8::internal::ReadNatives])
AC_TRY_LINK([
namespace v8 {
namespace internal {
void ReadNatives();
}
}], [v8::internal::ReadNatives();], [
AC_MSG_RESULT([found (using snapshots)])
AC_DEFINE([PHP_V8_USE_EXTERNAL_STARTUP_DATA], [1], [Whether V8 requires (and can be provided with custom versions of) external startup data])
SEARCH_PATH="$V8_DIR/lib"
AC_MSG_CHECKING([for natives_blob.bin])
SEARCH_FOR="natives_blob.bin"
for i in $SEARCH_PATH ; do
if test -r $i/$SEARCH_FOR; then
AC_MSG_RESULT([found ($i/$SEARCH_FOR)])
AC_DEFINE_UNQUOTED([PHP_V8_NATIVES_BLOB_PATH], "$i/$SEARCH_FOR", [Full path to natives_blob.bin file])
native_blob_found=1
fi
done
if test -z "$native_blob_found"; then
AC_MSG_RESULT([not found])
AC_MSG_ERROR([Please provide V8 native blob as needed])
fi
AC_MSG_CHECKING([for snapshot_blob.bin])
SEARCH_FOR="snapshot_blob.bin"
for i in $SEARCH_PATH ; do
if test -r $i/$SEARCH_FOR; then
AC_MSG_RESULT([found ($i/$SEARCH_FOR)])
AC_DEFINE_UNQUOTED([PHP_V8_SNAPSHOT_BLOB_PATH], "$i/$SEARCH_FOR", [Full path to snapshot_blob.bin file])
snapshot_blob_found=1
fi
done
if test -z "$snapshot_blob_found"; then
AC_MSG_RESULT([not found])
AC_MSG_ERROR([Please provide V8 snapshot blob as needed])
fi
], [
AC_MSG_RESULT([not found (snapshots disabled)])
])
AC_LANG_RESTORE AC_LANG_RESTORE
LIBS=$old_LIBS LIBS=$old_LIBS
LDFLAGS=$old_LDFLAGS LDFLAGS=$old_LDFLAGS

7
v8js_v8.cc
View File

@ -54,6 +54,13 @@ void v8js_v8_init(TSRMLS_D) /* {{{ */
} }
#endif #endif
#ifdef PHP_V8_USE_EXTERNAL_STARTUP_DATA
v8::V8::InitializeExternalStartupData(
PHP_V8_NATIVES_BLOB_PATH,
PHP_V8_SNAPSHOT_BLOB_PATH
);
#endif
#if !defined(_WIN32) && PHP_V8_API_VERSION >= 3029036 #if !defined(_WIN32) && PHP_V8_API_VERSION >= 3029036
v8js_process_globals.v8_platform = v8::platform::CreateDefaultPlatform(); v8js_process_globals.v8_platform = v8::platform::CreateDefaultPlatform();
v8::V8::InitializePlatform(v8js_process_globals.v8_platform); v8::V8::InitializePlatform(v8js_process_globals.v8_platform);