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Make TermWin's palette_get_overrides() take a Terminal *.

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Less than 12 hours after 0.75 went out of the door, a user pointed out
that enabling the 'Use system colours' config option causes an
immediate NULL-dereference crash. The reason is because a chain of
calls from term_init() ends up calling back to the Windows
implementation of the palette_get_overrides() method, which responds
by trying to call functions on the static variable 'term' in window.c,
which won't be initialised until term_init() has returned.

Simple fix: palette_get_overrides() is now given a pointer to the
Terminal that it should be updating, because it can't find it out any
other way.
This commit is contained in:
Simon Tatham
2021-05-08 18:13:06 +01:00
parent a55aac71e4
commit 571fa3388d
5 changed files with 15 additions and 9 deletions
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14
putty.h
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@ -1299,8 +1299,14 @@ struct TermWinVtable {
/* Query the front end for any OS-local overrides to the default
* colours stored in Conf. The front end should set any it cares
* about by calling term_palette_override. */
void (*palette_get_overrides)(TermWin *);
* about by calling term_palette_override.
*
* The Terminal object is passed in as a parameter, because this
* can be called as a callback from term_init(). So the TermWin
* itself won't yet have been told where to find its Terminal
* object, because that doesn't happen until term_init
* returns. */
void (*palette_get_overrides)(TermWin *, Terminal *);
};
static inline bool win_setup_draw_ctx(TermWin *win)
@ -1354,8 +1360,8 @@ static inline void win_set_zorder(TermWin *win, bool top)
static inline void win_palette_set(
TermWin *win, unsigned start, unsigned ncolours, const rgb *colours)
{ win->vt->palette_set(win, start, ncolours, colours); }
static inline void win_palette_get_overrides(TermWin *win)
{ win->vt->palette_get_overrides(win); }
static inline void win_palette_get_overrides(TermWin *win, Terminal *term)
{ win->vt->palette_get_overrides(win, term); }
/*
* Global functions not specific to a connection instance.