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Message-ID: <CAK7LNARkzq=D8hhqYERcjRzv5LXsepunQCX8rhG7nORZuBAj7Q@mail.gmail.com>
Date: Tue, 30 Jun 2020 12:48:13 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc: Maxim Levitsky <mlevitsk@...hat.com>,
Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] kconfig: qconf: make debug links work again
On Mon, Jun 29, 2020 at 6:35 PM Mauro Carvalho Chehab
<mchehab+huawei@...nel.org> wrote:
>
> The Qt5 conversion broke support for debug info links.
>
> Restore the behaviour added by changeset
> ab45d190fd4a ("kconfig: create links in info window").
>
> The original approach were to pass a pointer for a data struct
"were" -> "was" ?
> via an <a href>. That doesn't sound a good idea, as, if something
> gets wrong, the app could crash. So, instead, pass the name of
> the symbol, and validate such symbol at the hyperlink handling
> logic.
>
> Link: https://lore.kernel.org/lkml/20200628125421.12458086@coco.lan/
> Reported-by: Maxim Levitsky <mlevitsk@...hat.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
This patch does not cause segmentation fault any more.
Thanks.
> ---
> scripts/kconfig/qconf.cc | 75 +++++++++++++++++++++++++++++++++++++---
> scripts/kconfig/qconf.h | 1 +
> 2 files changed, 71 insertions(+), 5 deletions(-)
>
> diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
> index 85782da3e464..49f0688fceb8 100644
> --- a/scripts/kconfig/qconf.cc
> +++ b/scripts/kconfig/qconf.cc
> @@ -7,6 +7,7 @@
> #include <QAction>
> #include <QApplication>
> #include <QCloseEvent>
> +#include <QDebug>
> #include <QDesktopWidget>
> #include <QFileDialog>
> #include <QLabel>
> @@ -1012,7 +1013,7 @@ ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
> : Parent(parent), sym(0), _menu(0)
> {
> setObjectName(name);
> -
> + setOpenLinks(false);
>
> if (!objectName().isEmpty()) {
> configSettings->beginGroup(objectName());
> @@ -1085,7 +1086,7 @@ void ConfigInfoView::menuInfo(void)
> if (sym->name) {
> head += " (";
> if (showDebug())
> - head += QString().sprintf("<a href=\"s%p\">", sym);
> + head += QString().sprintf("<a href=\"s%s\">", sym->name);
> head += print_filter(sym->name);
> if (showDebug())
> head += "</a>";
> @@ -1094,7 +1095,7 @@ void ConfigInfoView::menuInfo(void)
> } else if (sym->name) {
> head += "<big><b>";
> if (showDebug())
> - head += QString().sprintf("<a href=\"s%p\">", sym);
> + head += QString().sprintf("<a href=\"s%s\">", sym->name);
> head += print_filter(sym->name);
> if (showDebug())
> head += "</a>";
> @@ -1145,7 +1146,7 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
> switch (prop->type) {
> case P_PROMPT:
> case P_MENU:
> - debug += QString().sprintf("prompt: <a href=\"m%p\">", prop->menu);
> + debug += QString().sprintf("prompt: <a href=\"m%s\">", sym->name);
> debug += print_filter(prop->text);
> debug += "</a><br>";
> break;
> @@ -1217,13 +1218,74 @@ void ConfigInfoView::expr_print_help(void *data, struct symbol *sym, const char
> QString str2 = print_filter(str);
>
> if (sym && sym->name && !(sym->flags & SYMBOL_CONST)) {
> - *text += QString().sprintf("<a href=\"s%p\">", sym);
> + *text += QString().sprintf("<a href=\"s%s\">", sym->name);
> *text += str2;
> *text += "</a>";
> } else
> *text += str2;
> }
>
> +void ConfigInfoView::clicked(const QUrl &url)
> +{
> + QByteArray str = url.toEncoded();
> + const std::size_t count = str.size();
> + char *data = new char[count + 1];
> + struct symbol **result;
> + struct menu *m = NULL;
> + char type;
> +
> + if (count < 1) {
> + qInfo() << "Clicked link is empty";
> + delete data;
> + return;
> + }
> +
> + memcpy(data, str.constData(), count);
> + data[count] = '\0';
> + type = data[0];
> +
> + /* Seek for exact match */
> + data[0] = '^';
> + strcat(data, "$");
> + result = sym_re_search(data);
> + if (!result) {
> + qInfo() << "Clicked symbol is invalid:" << data;
> + delete data;
> + return;
> + }
> +
> + sym = *result;
> + if (type == 's') {
> + symbolInfo();
> + emit showDebugChanged(true);
> + free(result);
> + delete data;
> + return;
> + }
> +
> + /* URL is a menu */
> + for (struct property *prop = sym->prop; prop; prop = prop->next) {
> + if (prop->type != P_PROMPT && prop->type != P_MENU)
> + continue;
> + m = prop->menu;
> + break;
> + }
> +
> + if (!m) {
> + qInfo() << "Clicked menu is invalid:" << data;
> + free(result);
> + delete data;
> + return;
> + }
> +
> + _menu = m;
> + menuInfo();
> +
> + emit showDebugChanged(true);
> + free(result);
> + delete data;
> +}
> +
> QMenu* ConfigInfoView::createStandardContextMenu(const QPoint & pos)
> {
> QMenu* popup = Parent::createStandardContextMenu(pos);
> @@ -1497,6 +1559,9 @@ ConfigMainWindow::ConfigMainWindow(void)
> helpMenu->addAction(showIntroAction);
> helpMenu->addAction(showAboutAction);
>
> + connect (helpText, SIGNAL (anchorClicked (const QUrl &)),
> + helpText, SLOT (clicked (const QUrl &)) );
> +
> connect(configList, SIGNAL(menuChanged(struct menu *)),
> helpText, SLOT(setInfo(struct menu *)));
> connect(configList, SIGNAL(menuSelected(struct menu *)),
> diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
> index d913a02967ae..a193137f2314 100644
> --- a/scripts/kconfig/qconf.h
> +++ b/scripts/kconfig/qconf.h
> @@ -250,6 +250,7 @@ public slots:
> void setInfo(struct menu *menu);
> void saveSettings(void);
> void setShowDebug(bool);
> + void clicked (const QUrl &url);
>
> signals:
> void showDebugChanged(bool);
> --
> 2.26.2
>
--
Best Regards
Masahiro Yamada
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