WebKit/Source/JavaScriptCore/API/glib/JSCException.cpp at main · WebKit/WebKit · GitHub

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* This library is free software; you can redistribute it and/or

* modify it under the terms of the GNU Library General Public

* License as published by the Free Software Foundation; either

* version 2 of the License, or (at your option) any later version.

* This library is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Library General Public License for more details.

* You should have received a copy of the GNU Library General Public License

* along with this library; see the file COPYING.LIB. If not, write to

* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

* Boston, MA 02110-1301, USA.

#include "config.h"

#include "JSCException.h"

#include "APICast.h"

#include "JSCContextPrivate.h"

#include "JSCExceptionPrivate.h"

#include "JSCInlines.h"

#include "JSRetainPtr.h"

#include "StrongInlines.h"

#include <glib/gprintf.h>

#include <wtf/glib/GUniquePtr.h>

#include <wtf/glib/GWeakPtr.h>

#include <wtf/glib/WTFGType.h>

/**

* JSCException:

* @short_description: JavaScript exception

* @title: JSCException

* @see_also: JSCContext

* JSCException represents a JavaScript exception.

struct _JSCExceptionPrivate {

GWeakPtr<JSCContext> context;

JSC::Strong<JSC::JSObject> jsException;

bool cached;

GUniquePtr<char> errorName;

GUniquePtr<char> message;

unsigned lineNumber;

unsigned columnNumber;

GUniquePtr<char> sourceURI;

GUniquePtr<char> backtrace;

};

WEBKIT_DEFINE_FINAL_TYPE(JSCException, jsc_exception, G_TYPE_OBJECT, GObject)

static void jsc_exception_class_init(JSCExceptionClass*)

{

}

GRefPtr<JSCException> jscExceptionCreate(JSCContext* context, JSValueRef jsException)

{

GRefPtr<JSCException> exception = adoptGRef(JSC_EXCEPTION(g_object_new(JSC_TYPE_EXCEPTION, nullptr)));

auto* jsContext = jscContextGetJSContext(context);

JSC::JSGlobalObject* globalObject = toJS(jsContext);

Ref vm = globalObject->vm();

JSC::JSLockHolder locker(vm);

exception->priv->jsException.set(vm, toJS(JSValueToObject(jsContext, jsException, nullptr)));

// The context has a strong reference to the exception, so we can't ref the context. We use a weak

// pointer instead to invalidate the exception if the context is destroyed before.

exception->priv->context.reset(context);

return exception;

}

JSValueRef jscExceptionGetJSValue(JSCException* exception)

{

return toRef(exception->priv->jsException.get());

}

void jscExceptionEnsureProperties(JSCException* exception)

{

JSCExceptionPrivate* priv = exception->priv;

if (priv->cached)

return;

priv->cached = true;

auto value = jscContextGetOrCreateValue(priv->context.get(), toRef(priv->jsException.get()));

auto propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "name"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->errorName.reset(jsc_value_to_string(propertyValue.get()));

propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "message"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->message.reset(jsc_value_to_string(propertyValue.get()));

propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "line"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->lineNumber = jsc_value_to_int32(propertyValue.get());

propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "column"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->columnNumber = jsc_value_to_int32(propertyValue.get());

propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "sourceURL"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->sourceURI.reset(jsc_value_to_string(propertyValue.get()));

propertyValue = adoptGRef(jsc_value_object_get_property(value.get(), "stack"));

if (!jsc_value_is_undefined(propertyValue.get()))

priv->backtrace.reset(jsc_value_to_string(propertyValue.get()));

}

/**

* jsc_exception_new:

* @context: a #JSCContext

* @message: the error message

* Create a new #JSCException in @context with @message.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new(JSCContext* context, const char* message)

{

return jsc_exception_new_with_name(context, nullptr, message);

}

/**

* jsc_exception_new_printf:

* @context: a #JSCContext

* @format: the string format

* @...: the parameters to insert into the format string

* Create a new #JSCException in @context using a formatted string

* for the message.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new_printf(JSCContext* context, const char* format, ...)

{

va_list args;

va_start(args, format);

auto* exception = jsc_exception_new_vprintf(context, format, args);

va_end(args);

return exception;

}

/**

* jsc_exception_new_vprintf:

* @context: a #JSCContext

* @format: the string format

* @args: the parameters to insert into the format string

* Create a new #JSCException in @context using a formatted string

* for the message. This is similar to jsc_exception_new_printf()

* except that the arguments to the format string are passed as a va_list.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new_vprintf(JSCContext* context, const char* format, va_list args)

{

g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);

GUniqueOutPtr<char> buffer;

g_vasprintf(&buffer.outPtr(), format, args);

return jsc_exception_new(context, buffer.get());

}

/**

* jsc_exception_new_with_name:

* @context: a #JSCContext

* @name: the error name

* @message: the error message

* Create a new #JSCException in @context with @name and @message.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new_with_name(JSCContext* context, const char* name, const char* message)

{

g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);

auto* jsContext = jscContextGetJSContext(context);

JSValueRef jsMessage = nullptr;

if (message) {

JSRetainPtr<JSStringRef> jsMessageString(Adopt, JSStringCreateWithUTF8CString(message));

jsMessage = JSValueMakeString(jsContext, jsMessageString.get());

}

auto exception = jscExceptionCreate(context, JSObjectMakeError(jsContext, jsMessage ? 1 : 0, &jsMessage, nullptr));

if (name) {

auto value = jscContextGetOrCreateValue(context, toRef(exception->priv->jsException.get()));

GRefPtr<JSCValue> nameValue = adoptGRef(jsc_value_new_string(context, name));

jsc_value_object_set_property(value.get(), "name", nameValue.get());

}

return exception.leakRef();

}

/**

* jsc_exception_new_with_name_printf:

* @context: a #JSCContext

* @name: the error name

* @format: the string format

* @...: the parameters to insert into the format string

* Create a new #JSCException in @context with @name and using a formatted string

* for the message.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new_with_name_printf(JSCContext* context, const char* name, const char* format, ...)

{

va_list args;

va_start(args, format);

auto* exception = jsc_exception_new_with_name_vprintf(context, name, format, args);

va_end(args);

return exception;

}

/**

* jsc_exception_new_with_name_vprintf:

* @context: a #JSCContext

* @name: the error name

* @format: the string format

* @args: the parameters to insert into the format string

* Create a new #JSCException in @context with @name and using a formatted string

* for the message. This is similar to jsc_exception_new_with_name_printf()

* except that the arguments to the format string are passed as a va_list.

* Returns: (transfer full): a new #JSCException.

JSCException* jsc_exception_new_with_name_vprintf(JSCContext* context, const char* name, const char* format, va_list args)

{

g_return_val_if_fail(JSC_IS_CONTEXT(context), nullptr);

GUniqueOutPtr<char> buffer;

g_vasprintf(&buffer.outPtr(), format, args);

return jsc_exception_new_with_name(context, name, buffer.get());

}

/**

* jsc_exception_get_name:

* @exception: a #JSCException

* Get the error name of @exception

* Returns: the @exception error name.

const char* jsc_exception_get_name(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

jscExceptionEnsureProperties(exception);

return priv->errorName.get();

}

/**

* jsc_exception_get_message:

* @exception: a #JSCException

* Get the error message of @exception.

* Returns: the @exception error message.

const char* jsc_exception_get_message(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

jscExceptionEnsureProperties(exception);

return priv->message.get();

}

/**

* jsc_exception_get_line_number:

* @exception: a #JSCException

* Get the line number at which @exception happened.

* Returns: the line number of @exception.

guint jsc_exception_get_line_number(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), 0);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, 0);

jscExceptionEnsureProperties(exception);

return priv->lineNumber;

}

/**

* jsc_exception_get_column_number:

* @exception: a #JSCException

* Get the column number at which @exception happened.

* Returns: the column number of @exception.

guint jsc_exception_get_column_number(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), 0);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, 0);

jscExceptionEnsureProperties(exception);

return priv->columnNumber;

}

/**

* jsc_exception_get_source_uri:

* @exception: a #JSCException

* Get the source URI of @exception.

* Returns: (nullable): the the source URI of @exception, or %NULL.

const char* jsc_exception_get_source_uri(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

jscExceptionEnsureProperties(exception);

return priv->sourceURI.get();

}

/**

* jsc_exception_get_backtrace_string:

* @exception: a #JSCException

* Get a string with the exception backtrace.

* Returns: (nullable): the exception backtrace string or %NULL.

const char* jsc_exception_get_backtrace_string(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

jscExceptionEnsureProperties(exception);

return priv->backtrace.get();

}

/**

* jsc_exception_to_string:

* @exception: a #JSCException

* Get the string representation of @exception error.

* Returns: (transfer full): the string representation of @exception.

char* jsc_exception_to_string(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

auto value = jscContextGetOrCreateValue(priv->context.get(), toRef(priv->jsException.get()));

return jsc_value_to_string(value.get());

}

/**

* jsc_exception_report:

* @exception: a #JSCException

* Return a report message of @exception, containing all the possible details such us

* source URI, line, column and backtrace, and formatted to be printed.

* Returns: (transfer full): a new string with the exception report

char* jsc_exception_report(JSCException* exception)

{

g_return_val_if_fail(JSC_IS_EXCEPTION(exception), nullptr);

JSCExceptionPrivate* priv = exception->priv;

g_return_val_if_fail(priv->context, nullptr);

jscExceptionEnsureProperties(exception);

auto report = StringBuilder();

if (priv->sourceURI)

report.append(unsafeSpan(priv->sourceURI.get()));

if (priv->lineNumber)

report.append(':', priv->lineNumber);

if (priv->columnNumber)

report.append(':', priv->columnNumber);

report.append(' ');

GUniquePtr<char> errorMessage(jsc_exception_to_string(exception));

if (errorMessage)

report.append(unsafeSpan(errorMessage.get()));

report.append('\n');

if (priv->backtrace) {

for (auto line : StringView::fromLatin1(priv->backtrace.get()).split('\n'))

report.append(" "_s, line, '\n');

}

return g_strdup(report.toString().utf8().data());

}

WebKit/Source/JavaScriptCore/API/glib/JSCException.cpp at main · WebKit/WebKit · GitHub

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