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1063bbb711
A QEMUCursor outlives the call that publishes it and is shared between
threads, but its refcount was a plain int with no single lock covering
every user. qemu_console_set_cursor() takes and drops references from
the main loop under the BQL alone, hw/display/qxl-render.c does so from
the SPICE display worker thread, and ui/spice-display.c does so under
SimpleSpiceDisplay::lock. ui/cocoa.m and ui/dbus-listener.c add two more
threads.
The pair that collides is qemu_spice_cursor_refresh_bh(), which drops
ssd->lock before calling qemu_console_set_cursor(), and the worker
refcounting the same cursor under that lock. A lost increment frees the
cursor while the console still points at it, so the console's next unref
decrements memory the allocator has already handed out again. Locking
ssd.cursor is not enough on its own: with that done, this is the race
that remains.
Assert on the value the decrement observed while here. Dropping a
reference that was never taken used to be silent, because the decrement
lands in the allocator metadata of the freed chunk: nothing is logged,
the object is not freed twice, and the process runs on until some later
allocation walks the damaged free list and faults, arbitrarily far from
the code that caused it.
Fixes: 0b2824e5e4 ("spice: use bottom half instead of refresh timer for cursor updates")
Cc: qemu-stable@nongnu.org
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20260903192647.2677279-3-den@openvz.org>
467 lines
17 KiB
C
467 lines
17 KiB
C
#ifndef CONSOLE_H
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#define CONSOLE_H
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#include "ui/qemu-pixman.h"
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#include "qom/object.h"
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#include "qemu/notify.h"
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#include "qapi/qapi-types-ui.h"
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#include "ui/input.h"
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#include "ui/surface.h"
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#include "ui/dmabuf.h"
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#define TYPE_QEMU_CONSOLE "qemu-console"
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OBJECT_DECLARE_TYPE(QemuConsole, QemuConsoleClass, QEMU_CONSOLE)
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#define TYPE_QEMU_GRAPHIC_CONSOLE "qemu-graphic-console"
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OBJECT_DECLARE_SIMPLE_TYPE(QemuGraphicConsole, QEMU_GRAPHIC_CONSOLE)
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#define TYPE_QEMU_TEXT_CONSOLE "qemu-text-console"
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OBJECT_DECLARE_SIMPLE_TYPE(QemuTextConsole, QEMU_TEXT_CONSOLE)
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#define TYPE_QEMU_FIXED_TEXT_CONSOLE "qemu-fixed-text-console"
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OBJECT_DECLARE_SIMPLE_TYPE(QemuFixedTextConsole, QEMU_FIXED_TEXT_CONSOLE)
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#define QEMU_IS_GRAPHIC_CONSOLE(c) \
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object_dynamic_cast(OBJECT(c), TYPE_QEMU_GRAPHIC_CONSOLE)
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#define QEMU_IS_TEXT_CONSOLE(c) \
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object_dynamic_cast(OBJECT(c), TYPE_QEMU_TEXT_CONSOLE)
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#define QEMU_IS_FIXED_TEXT_CONSOLE(c) \
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object_dynamic_cast(OBJECT(c), TYPE_QEMU_FIXED_TEXT_CONSOLE)
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/* identical to the ps/2 keyboard bits */
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#define QEMU_SCROLL_LOCK_LED (1 << 0)
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#define QEMU_NUM_LOCK_LED (1 << 1)
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#define QEMU_CAPS_LOCK_LED (1 << 2)
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/* in ms */
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#define GUI_REFRESH_INTERVAL_DEFAULT 30
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#define GUI_REFRESH_INTERVAL_IDLE 3000
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/* Color number is match to standard vga palette */
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enum qemu_color_names {
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QEMU_COLOR_BLACK = 0,
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QEMU_COLOR_BLUE = 1,
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QEMU_COLOR_GREEN = 2,
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QEMU_COLOR_CYAN = 3,
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QEMU_COLOR_RED = 4,
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QEMU_COLOR_MAGENTA = 5,
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QEMU_COLOR_YELLOW = 6,
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QEMU_COLOR_WHITE = 7
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};
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/* Convert to curses char attributes */
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#define ATTR2CHTYPE(c, fg, bg, bold) \
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((bold) << 21 | (bg) << 11 | (fg) << 8 | (c))
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bool qemu_mouse_set(int index, Error **errp);
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/* keysym is a unicode code except for special keys (see QEMU_KEY_xxx
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constants) */
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#define QEMU_KEY_ESC1(c) ((c) | 0xe100)
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#define QEMU_KEY_TAB 0x0009
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#define QEMU_KEY_BACKSPACE 0x007f
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#define QEMU_KEY_UP QEMU_KEY_ESC1('A')
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#define QEMU_KEY_DOWN QEMU_KEY_ESC1('B')
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#define QEMU_KEY_RIGHT QEMU_KEY_ESC1('C')
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#define QEMU_KEY_LEFT QEMU_KEY_ESC1('D')
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#define QEMU_KEY_HOME QEMU_KEY_ESC1(1)
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#define QEMU_KEY_END QEMU_KEY_ESC1(4)
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#define QEMU_KEY_PAGEUP QEMU_KEY_ESC1(5)
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#define QEMU_KEY_PAGEDOWN QEMU_KEY_ESC1(6)
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#define QEMU_KEY_DELETE QEMU_KEY_ESC1(3)
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#define QEMU_KEY_CTRL_UP 0xe400
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#define QEMU_KEY_CTRL_DOWN 0xe401
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#define QEMU_KEY_CTRL_LEFT 0xe402
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#define QEMU_KEY_CTRL_RIGHT 0xe403
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#define QEMU_KEY_CTRL_HOME 0xe404
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#define QEMU_KEY_CTRL_END 0xe405
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#define QEMU_KEY_CTRL_PAGEUP 0xe406
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#define QEMU_KEY_CTRL_PAGEDOWN 0xe407
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void qemu_text_console_put_keysym(QemuTextConsole *s, int keysym);
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bool qemu_text_console_put_linux(QemuTextConsole *s, unsigned int lnx,
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bool ctrl);
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void qemu_text_console_put_string(QemuTextConsole *s, const char *str, int len);
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/* consoles */
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struct QemuConsoleClass {
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ObjectClass parent_class;
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char * (*get_label)(const QemuConsole *con);
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};
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typedef struct ScanoutTexture {
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uint32_t backing_id;
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bool backing_y_0_top;
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uint32_t backing_width;
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uint32_t backing_height;
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uint32_t x;
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uint32_t y;
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uint32_t width;
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uint32_t height;
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void *d3d_tex2d;
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} ScanoutTexture;
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typedef struct QemuUIInfo {
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/* physical dimension */
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uint16_t width_mm;
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uint16_t height_mm;
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/* geometry */
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int xoff;
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int yoff;
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uint32_t width;
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uint32_t height;
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uint32_t refresh_rate;
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} QemuUIInfo;
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/* cursor data format is 32bit RGBA */
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typedef struct QEMUCursor {
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uint16_t width, height;
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int hot_x, hot_y;
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int refcount;
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uint32_t data[];
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} QEMUCursor;
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QEMUCursor *cursor_alloc(uint16_t width, uint16_t height);
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/*
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* A cursor may be shared between the main loop, a vCPU thread and a
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* display backend's own thread, so the refcount is atomic and these two
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* may be called from any of them. The object itself is not otherwise
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* thread-safe: take a reference before publishing the pointer anywhere
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* another thread can reach it, and never dereference a cursor you do
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* not hold a reference to.
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*/
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QEMUCursor *cursor_ref(QEMUCursor *c);
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void cursor_unref(QEMUCursor *c);
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QEMUCursor *cursor_builtin_hidden(void);
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QEMUCursor *cursor_builtin_left_ptr(void);
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void cursor_print_ascii_art(QEMUCursor *c, const char *prefix);
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int cursor_get_mono_bpl(QEMUCursor *c);
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void cursor_set_mono(QEMUCursor *c,
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uint32_t foreground, uint32_t background, uint8_t *image,
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int transparent, uint8_t *mask);
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void cursor_get_mono_mask(QEMUCursor *c, int transparent, uint8_t *mask);
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typedef void *QEMUGLContext;
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typedef struct QEMUGLParams QEMUGLParams;
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struct QEMUGLParams {
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int major_ver;
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int minor_ver;
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};
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enum display_scanout {
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SCANOUT_NONE,
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SCANOUT_SURFACE,
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SCANOUT_TEXTURE,
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SCANOUT_DMABUF,
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};
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typedef struct DisplayScanout {
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enum display_scanout kind;
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union {
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/* DisplaySurface *surface; is kept in QemuConsole */
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ScanoutTexture texture;
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QemuDmaBuf *dmabuf;
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};
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} DisplayScanout;
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typedef struct DisplayState DisplayState;
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typedef struct DisplayGLCtx DisplayGLCtx;
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typedef struct DisplayChangeListenerOps {
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const char *dpy_name;
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/* optional */
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void (*dpy_refresh)(DisplayChangeListener *dcl);
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/* optional */
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void (*dpy_gfx_update)(DisplayChangeListener *dcl,
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int x, int y, int w, int h);
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/* optional */
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void (*dpy_gfx_switch)(DisplayChangeListener *dcl,
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struct DisplaySurface *new_surface);
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/* optional */
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bool (*dpy_gfx_check_format)(DisplayChangeListener *dcl,
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pixman_format_code_t format);
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/* optional */
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void (*dpy_text_cursor)(DisplayChangeListener *dcl,
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int x, int y);
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/* optional */
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void (*dpy_text_resize)(DisplayChangeListener *dcl,
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int w, int h);
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/* optional */
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void (*dpy_text_update)(DisplayChangeListener *dcl,
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int x, int y, int w, int h);
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/* optional */
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void (*dpy_mouse_set)(DisplayChangeListener *dcl,
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int x, int y, bool on);
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/* optional */
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void (*dpy_cursor_define)(DisplayChangeListener *dcl,
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QEMUCursor *cursor);
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/* required if GL */
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void (*dpy_gl_scanout_disable)(DisplayChangeListener *dcl);
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/* required if GL */
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void (*dpy_gl_scanout_texture)(DisplayChangeListener *dcl,
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uint32_t backing_id,
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bool backing_y_0_top,
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uint32_t backing_width,
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uint32_t backing_height,
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uint32_t x, uint32_t y,
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uint32_t w, uint32_t h,
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void *d3d_tex2d);
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/* optional (default to true if has dpy_gl_scanout_dmabuf) */
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bool (*dpy_has_dmabuf)(DisplayChangeListener *dcl);
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/* optional */
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void (*dpy_gl_scanout_dmabuf)(DisplayChangeListener *dcl,
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QemuDmaBuf *dmabuf);
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/* optional */
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void (*dpy_gl_cursor_dmabuf)(DisplayChangeListener *dcl,
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QemuDmaBuf *dmabuf, bool have_hot,
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uint32_t hot_x, uint32_t hot_y);
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/* optional */
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void (*dpy_gl_cursor_position)(DisplayChangeListener *dcl,
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uint32_t pos_x, uint32_t pos_y);
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/* optional */
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void (*dpy_gl_release_dmabuf)(DisplayChangeListener *dcl,
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QemuDmaBuf *dmabuf);
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/* required if GL */
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void (*dpy_gl_update)(DisplayChangeListener *dcl,
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uint32_t x, uint32_t y, uint32_t w, uint32_t h);
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} DisplayChangeListenerOps;
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struct DisplayChangeListener {
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uint64_t update_interval;
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const DisplayChangeListenerOps *ops;
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DisplayState *ds;
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QemuConsole *con;
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QLIST_ENTRY(DisplayChangeListener) next;
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};
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typedef struct DisplayGLCtxOps {
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bool (*dpy_gl_ctx_is_compatible_dcl)(DisplayGLCtx *dgc,
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DisplayChangeListener *dcl);
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QEMUGLContext (*dpy_gl_ctx_create)(DisplayGLCtx *dgc,
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QEMUGLParams *params);
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void (*dpy_gl_ctx_destroy)(DisplayGLCtx *dgc,
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QEMUGLContext ctx);
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int (*dpy_gl_ctx_make_current)(DisplayGLCtx *dgc,
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QEMUGLContext ctx);
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void (*dpy_gl_ctx_create_texture)(DisplayGLCtx *dgc,
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DisplaySurface *surface);
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void (*dpy_gl_ctx_destroy_texture)(DisplayGLCtx *dgc,
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DisplaySurface *surface);
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void (*dpy_gl_ctx_update_texture)(DisplayGLCtx *dgc,
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DisplaySurface *surface,
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int x, int y, int w, int h);
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} DisplayGLCtxOps;
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struct DisplayGLCtx {
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const DisplayGLCtxOps *ops;
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#ifdef CONFIG_OPENGL
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QemuGLShader *gls; /* optional shared shader */
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#endif
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};
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DisplayState *init_displaystate(void);
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void qemu_console_register_listener(QemuConsole *con,
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DisplayChangeListener *dcl,
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const DisplayChangeListenerOps *ops);
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void qemu_console_listener_set_refresh(DisplayChangeListener *dcl,
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uint64_t interval);
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void qemu_console_unregister_listener(DisplayChangeListener *dcl);
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bool qemu_console_ui_info_supported(const QemuConsole *con);
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const QemuUIInfo *qemu_console_get_ui_info(const QemuConsole *con);
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int qemu_console_set_ui_info(QemuConsole *con, QemuUIInfo *info, bool delay);
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void qemu_console_update(QemuConsole *con, int x, int y, int w, int h);
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void qemu_console_update_full(QemuConsole *con);
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void qemu_console_set_surface(QemuConsole *con,
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DisplaySurface *surface);
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void qemu_console_text_set_cursor(QemuConsole *con, int x, int y);
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void qemu_console_text_update(QemuConsole *con, int x, int y, int w, int h);
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void qemu_console_text_resize(QemuConsole *con, int w, int h);
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void qemu_console_set_mouse(QemuConsole *con, int x, int y, bool on);
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void qemu_console_set_cursor(QemuConsole *con, QEMUCursor *cursor);
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bool qemu_console_check_format(QemuConsole *con,
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pixman_format_code_t format);
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void qemu_console_gl_scanout_disable(QemuConsole *con);
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void qemu_console_gl_scanout_texture(QemuConsole *con,
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uint32_t backing_id, bool backing_y_0_top,
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uint32_t backing_width, uint32_t backing_height,
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uint32_t x, uint32_t y, uint32_t w, uint32_t h,
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void *d3d_tex2d);
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void qemu_console_gl_scanout_dmabuf(QemuConsole *con,
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QemuDmaBuf *dmabuf);
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void qemu_console_gl_cursor_dmabuf(QemuConsole *con, QemuDmaBuf *dmabuf,
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bool have_hot, uint32_t hot_x, uint32_t hot_y);
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void qemu_console_gl_cursor_position(QemuConsole *con,
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uint32_t pos_x, uint32_t pos_y);
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void qemu_console_gl_release_dmabuf(QemuConsole *con,
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QemuDmaBuf *dmabuf);
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void qemu_console_gl_update(QemuConsole *con,
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uint32_t x, uint32_t y, uint32_t w, uint32_t h);
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QEMUGLContext qemu_console_gl_ctx_create(QemuConsole *con,
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QEMUGLParams *params);
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void qemu_console_gl_ctx_destroy(QemuConsole *con, QEMUGLContext ctx);
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int qemu_console_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx);
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bool qemu_console_has_gl(QemuConsole *con);
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enum {
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GRAPHIC_FLAGS_NONE = 0,
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/* require a console/display with GL callbacks */
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GRAPHIC_FLAGS_GL = 1 << 0,
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/* require a console/display with DMABUF import */
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GRAPHIC_FLAGS_DMABUF = 1 << 1,
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};
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typedef struct GraphicHwOps {
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int (*get_flags)(void *opaque); /* optional, default 0 */
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void (*invalidate)(void *opaque);
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/*
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* Returns true if the update is handled synchronously, false if deferred
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* and graphic_hw_update_done() will be called when ready (to resume waiting
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* tasks/coroutines).
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* Optional.
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*/
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bool (*gfx_update)(void *opaque);
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void (*text_update)(void *opaque, uint32_t *text);
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void (*ui_info)(void *opaque, uint32_t head, QemuUIInfo *info);
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void (*gl_block)(void *opaque, bool block);
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} GraphicHwOps;
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QemuConsole *qemu_graphic_console_create(DeviceState *dev, uint32_t head,
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const GraphicHwOps *ops,
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void *opaque);
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void qemu_graphic_console_set_hwops(QemuConsole *con,
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const GraphicHwOps *hw_ops,
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void *opaque);
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void qemu_graphic_console_close(QemuConsole *con);
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void qemu_console_hw_update(QemuConsole *con);
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void qemu_console_hw_update_done(QemuConsole *con);
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void qemu_console_hw_invalidate(QemuConsole *con);
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void qemu_console_hw_text_update(QemuConsole *con, uint32_t *chardata);
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void qemu_console_hw_gl_block(QemuConsole *con, bool block);
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void qemu_console_early_init(void);
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void qemu_console_set_display_gl_ctx(QemuConsole *con, DisplayGLCtx *ctx);
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QemuConsole *qemu_console_lookup_default(void);
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QemuConsole *qemu_console_lookup_by_index(unsigned int index);
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QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head);
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QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
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uint32_t head, Error **errp);
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QEMUCursor *qemu_console_get_cursor(QemuConsole *con);
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bool qemu_console_is_graphic(QemuConsole *con);
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bool qemu_console_is_fixedsize(QemuConsole *con);
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bool qemu_console_is_gl_blocked(QemuConsole *con);
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char *qemu_console_get_label(QemuConsole *con);
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int qemu_console_get_index(QemuConsole *con);
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uint32_t qemu_console_get_head(QemuConsole *con);
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int qemu_console_get_width(QemuConsole *con, int fallback);
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int qemu_console_get_height(QemuConsole *con, int fallback);
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/* Return the low-level window id for the console */
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int qemu_console_get_window_id(QemuConsole *con);
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/* Set the low-level window id for the console */
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void qemu_console_set_window_id(QemuConsole *con, int window_id);
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void qemu_console_resize(QemuConsole *con, int width, int height);
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DisplaySurface *qemu_console_surface(QemuConsole *con);
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void coroutine_fn qemu_console_co_wait_update(QemuConsole *con);
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/* console-gl.c */
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#ifdef CONFIG_OPENGL
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bool console_gl_check_format(DisplayChangeListener *dcl,
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pixman_format_code_t format);
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void surface_gl_create_texture(QemuGLShader *gls,
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DisplaySurface *surface);
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bool surface_gl_create_texture_from_fd(DisplaySurface *surface,
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int fd, uint32_t *texture,
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uint32_t *mem_obj);
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void surface_gl_update_texture(QemuGLShader *gls,
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DisplaySurface *surface,
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int x, int y, int w, int h);
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void surface_gl_render_texture(QemuGLShader *gls,
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DisplaySurface *surface);
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void surface_gl_destroy_texture(QemuGLShader *gls,
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DisplaySurface *surface);
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void surface_gl_setup_viewport(QemuGLShader *gls,
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DisplaySurface *surface,
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int ww, int wh);
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#endif
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typedef struct QemuDisplay QemuDisplay;
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struct QemuDisplay {
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DisplayType type;
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void (*early_init)(DisplayOptions *opts);
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void (*init)(DisplayState *ds, DisplayOptions *opts);
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void (*cleanup)(void);
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const char *vc;
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};
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void qemu_display_register(QemuDisplay *ui);
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bool qemu_display_find_default(DisplayOptions *opts);
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void qemu_display_early_init(DisplayOptions *opts);
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void qemu_display_init(DisplayState *ds, DisplayOptions *opts);
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const char *qemu_display_get_vc(DisplayOptions *opts);
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void qemu_display_cleanup(void);
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void qemu_display_help(void);
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|
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/*
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* Console notifications:
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* Handlers must be idempotent, it may notify multiple times.
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*/
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typedef enum {
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QEMU_CONSOLE_ADDED,
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QEMU_CONSOLE_REMOVED,
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} QemuConsoleEventType;
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|
|
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typedef struct QemuConsoleEvent {
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QemuConsoleEventType type;
|
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QemuConsole *con;
|
|
} QemuConsoleEvent;
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|
|
|
void qemu_console_add_notifier(Notifier *notifier);
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|
void qemu_console_remove_notifier(Notifier *notifier);
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void qemu_console_notify(QemuConsoleEventType type, QemuConsole *con);
|
|
|
|
/* vnc.c */
|
|
void vnc_display_add_client(const char *id, int csock, bool skipauth);
|
|
int vnc_display_password(const char *id, const char *password, Error **errp);
|
|
int vnc_display_pw_expire(const char *id, time_t expires);
|
|
void vnc_parse(const char *str);
|
|
int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp);
|
|
bool vnc_display_reload_certs(const char *id, Error **errp);
|
|
bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp);
|
|
void vnc_cleanup(void);
|
|
|
|
#ifdef CONFIG_LINUX
|
|
/* udmabuf.c */
|
|
int udmabuf_fd(void);
|
|
#endif
|
|
|
|
/* util.c */
|
|
bool qemu_console_fill_device_address(QemuConsole *con,
|
|
char *device_address,
|
|
size_t size,
|
|
Error **errp);
|
|
|
|
#endif
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