blob: cd79cfb2037012e89933cc32533513ac861d8dc5 [file] [log] [blame]
Mike Kleinb18eb352018-03-22 11:32:09 -04001/*
2 * Copyright 2018 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
Ben Wagner7fde8e12019-05-01 17:28:53 -04008#include "include/core/SkCanvas.h"
Mike Kleinc0bd9f92019-04-23 12:05:21 -05009#include "include/core/SkPaint.h"
10#include "include/core/SkPath.h"
Ben Wagner7fde8e12019-05-01 17:28:53 -040011#include "include/core/SkPathEffect.h"
12#include "include/core/SkTypes.h"
Mike Kleinc0bd9f92019-04-23 12:05:21 -050013#include "include/effects/SkDashPathEffect.h"
Mike Kleinb18eb352018-03-22 11:32:09 -040014
15// Repro case for skia:7674. Requires lots of RAM to run, and currently triggers UB:
16// ../include/private/SkTDArray.h:382:26:
17// runtime error: signed integer overflow: 2147483644 + 4 cannot be represented in type 'int'
18
Ben Wagner7fde8e12019-05-01 17:28:53 -040019static SK_UNUSED void path_measure_explosion(SkCanvas* canvas) {
Mike Kleinb18eb352018-03-22 11:32:09 -040020 SkPaint p;
21 p.setAntiAlias(false);
22 float intervals[] = { 0, 10e9f };
23 p.setStyle(SkPaint::kStroke_Style);
24 p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0));
25
26 int quadratic_at[] = {
27 13, 68, 258, 1053, 1323, 2608, 10018, 15668, 59838, 557493, 696873, 871098, 4153813,
28 15845608, 48357008, 118059138, 288230353, 360287948, 562949933, 703687423, 1099511613, 0
29 };
30 int next_quadratic_at = 0;
31
32 SkPath path;
33 path.moveTo(0, 0);
34
35 int i = 1;
36 for (int points = 1; points < 2147483647; ) {
37 if (points == quadratic_at[next_quadratic_at]) {
38 path.quadTo(i, 0, i, 0);
39 next_quadratic_at++;
40 points += 2;
41 } else {
42 path.lineTo(i, 0);
43 points += 1;
44 }
45
46 i++;
47
48 if (i == 1000000) {
49 path.moveTo(0, 0);
50 points += 1;
51 i = 1;
52 }
53 }
54 canvas->drawPath(path, p);
55}
Ben Wagner7fde8e12019-05-01 17:28:53 -040056
57#if 0
58#include "gm/gm.h"
59DEF_SIMPLE_GM(PathMeasure_explosion, canvas, 500,500) {
60 path_measure_explosion(canvas);
61}
Mike Kleinb18eb352018-03-22 11:32:09 -040062#endif