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comparison gcc/testsuite/g++.dg/coroutines/torture/exceptions-test-0.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
1 // { dg-do run }
2
3 // Test exceptions.
4
5 #include "../coro.h"
6 #include <exception>
7
8 int gX = 0;
9
10 struct coro1 {
11 struct promise_type;
12 using handle_type = coro::coroutine_handle<coro1::promise_type>;
13 handle_type handle;
14 coro1 () : handle(0) {}
15 coro1 (handle_type _handle)
16 : handle(_handle) {
17 PRINT("Created coro1 object from handle");
18 }
19 coro1 (const coro1 &) = delete; // no copying
20 coro1 (coro1 &&s) : handle(s.handle) {
21 s.handle = nullptr;
22 PRINT("coro1 mv ctor ");
23 }
24 coro1 &operator = (coro1 &&s) {
25 handle = s.handle;
26 s.handle = nullptr;
27 PRINT("coro1 op= ");
28 return *this;
29 }
30 ~coro1() {
31 PRINT("Destroyed coro1");
32 if ( handle )
33 handle.destroy();
34 }
35
36 struct suspend_never_prt {
37 bool await_ready() const noexcept { return true; }
38 void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp"); }
39 void await_resume() const noexcept { PRINT ("susp-never-resume");}
40 };
41
42 /* NOTE: this has a DTOR to test that pathway. */
43 struct suspend_always_prt {
44 bool await_ready() const noexcept { return false; }
45 void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp"); }
46 void await_resume() const noexcept { PRINT ("susp-always-resume"); }
47 ~suspend_always_prt() { PRINT ("susp-always-DTOR"); }
48 };
49
50 struct promise_type {
51 int value;
52 promise_type() { PRINT ("Created Promise"); }
53 ~promise_type() { PRINT ("Destroyed Promise"); }
54
55 auto get_return_object () {
56 PRINT ("get_return_object: handle from promise");
57 return handle_type::from_promise (*this);
58 }
59 auto initial_suspend () {
60 PRINT ("get initial_suspend (always)");
61 return suspend_always_prt{};
62 }
63 auto final_suspend () {
64 PRINT ("get final_suspend (always)");
65 return suspend_always_prt{};
66 }
67 void return_value (int v) {
68 PRINTF ("return_value () %d\n",v);
69 value = v;
70 }
71 auto yield_value (int v) {
72 PRINTF ("yield_value () %d and suspend always\n",v);
73 value = v;
74 return suspend_always_prt{};
75 }
76 /* Some non-matching overloads. */
77 auto yield_value (suspend_always_prt s, int x) {
78 return s;
79 }
80 auto yield_value (void) {
81 return 42;//suspend_always_prt{};
82 }
83 int get_value (void) { return value; }
84
85 void unhandled_exception() {
86 PRINT ("unhandled_exception: caught one!");
87 gX = -1;
88 // returning from here should end up in final_suspend.
89 }
90 };
91 };
92
93 // So we want to check that the internal behaviour of try/catch is
94 // working OK - and that if we have an unhandled exception it is caught
95 // by the wrapper that we add to the rewritten func.
96
97 struct coro1 throw_and_catch () noexcept
98 {
99 int caught = 0;
100
101 try {
102 PRINT ("f: about to yield 42");
103 co_yield 42;
104
105 throw (20);
106
107 PRINT ("f: about to yield 6174");
108 co_return 6174;
109
110 } catch (int x) {
111 PRINTF ("f: caught %d\n", x);
112 caught = x;
113 }
114
115 PRINTF ("f: about to yield what we caught %d\n", caught);
116 co_yield caught;
117
118 throw ("bah");
119
120 PRINT ("f: about to return 22");
121 co_return 22;
122 }
123
124 int main ()
125 {
126 PRINT ("main: create coro1");
127 struct coro1 x = throw_and_catch ();
128 if (x.handle.done())
129 abort();
130 x.handle.resume();
131 PRINT ("main: got coro, resuming..");
132 int y = x.handle.promise().get_value();
133 if ( y != 42 )
134 abort ();
135 PRINT ("main: apparently got the expected 42");
136 if (x.handle.done())
137 abort();
138 PRINT ("main: resuming...");
139 x.handle.resume();
140
141 y = x.handle.promise().get_value();
142 if ( y != 20 )
143 abort ();
144 PRINT ("main: apparently got 20, which we expected");
145 if (x.handle.done())
146 abort();
147
148 PRINT ("main: resuming...");
149 x.handle.resume();
150 // This should cause the throw of "bah" which is unhandled.
151 // We should catch the unhandled exception and then fall through
152 // to the final suspend point... thus be "done".
153 if (!x.handle.done())
154 {
155 PRINT ("main: apparently not done...");
156 abort ();
157 }
158 // When we caught the unhandled exception we flagged it instead of
159 // std::terminate-ing.
160 if (gX != -1)
161 {
162 PRINT ("main: apparently failed to catch");
163 abort ();
164 }
165 PRINT ("main: returning");
166 return 0;
167 }