source: libcfa/src/concurrency/invoke.h@ 5fe7322

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 5fe7322 was 5715d43, checked in by Andrew Beach <ajbeach@…>, 5 years ago

Exceptions now get their context differently with libcfathread. Added a number of tests to help test this.
  • Property mode set to 100644
File size: 7.4 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// invoke.h --
8//
9// Author : Thierry Delisle
10// Created On : Tue Jan 17 12:27:26 2016
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Dec 5 16:26:03 2019
13// Update Count : 44
14//
15
16#include "bits/containers.hfa"
17#include "bits/defs.hfa"
18#include "bits/locks.hfa"
19#include "kernel/fwd.hfa"
20
21#ifdef __cforall
22extern "C" {
23#endif
24
25#if ! defined(__CFA_INVOKE_PRIVATE__)
26#ifndef _INVOKE_H_
27#define _INVOKE_H_
28
29 struct __cfaehm_try_resume_node;
30 struct __cfaehm_base_exception_t;
31 struct exception_context_t {
32 struct __cfaehm_try_resume_node * top_resume;
33 struct __cfaehm_base_exception_t * current_exception;
34 };
35
36 struct __stack_context_t {
37 void * SP;
38 void * FP;
39 };
40
41 // low adresses : +----------------------+ <- start of allocation
42 // | optional guard page |
43 // +----------------------+ <- __stack_t.limit
44 // | |
45 // | /\ /\ /\ |
46 // | || || || |
47 // | |
48 // | program stack |
49 // | |
50 // __stack_info_t.storage -> +----------------------+ <- __stack_t.base
51 // | __stack_t |
52 // high adresses : +----------------------+ <- end of allocation
53
54 struct __stack_t {
55 // stack grows towards stack limit
56 void * limit;
57
58 // base of stack
59 void * base;
60
61 // Information for exception handling.
62 struct exception_context_t exception_context;
63 };
64
65 struct __stack_info_t {
66 // pointer to stack
67 struct __stack_t * storage;
68 };
69
70 enum __Coroutine_State { Halted, Start, Primed, Blocked, Ready, Active };
71
72 struct $coroutine {
73 // context that is switch during a __cfactx_switch
74 struct __stack_context_t context;
75
76 // stack information of the coroutine
77 struct __stack_info_t stack;
78
79 // textual name for coroutine/task
80 const char * name;
81
82 // current execution status for coroutine
83 enum __Coroutine_State state;
84
85 // first coroutine to resume this one
86 struct $coroutine * starter;
87
88 // last coroutine to resume this one
89 struct $coroutine * last;
90
91 // If non-null stack must be unwound with this exception
92 struct _Unwind_Exception * cancellation;
93
94 };
95
96 static inline struct __stack_t * __get_stack( struct $coroutine * cor ) {
97 return (struct __stack_t*)(((uintptr_t)cor->stack.storage) & ((uintptr_t)-2));
98 }
99
100 struct exception_context_t * this_exception_context();
101
102 // struct which calls the monitor is accepting
103 struct __waitfor_mask_t {
104 // the index of the accepted function, -1 if none
105 short * accepted;
106
107 // list of acceptable functions, null if any
108 __cfa_anonymous_object( __small_array_t(struct __acceptable_t) );
109 };
110
111 struct $monitor {
112 // spinlock to protect internal data
113 struct __spinlock_t lock;
114
115 // current owner of the monitor
116 struct $thread * owner;
117
118 // queue of threads that are blocked waiting for the monitor
119 __queue_t(struct $thread) entry_queue;
120
121 // stack of conditions to run next once we exit the monitor
122 __stack_t(struct __condition_criterion_t) signal_stack;
123
124 // monitor routines can be called recursively, we need to keep track of that
125 unsigned int recursion;
126
127 // mask used to know if some thread is waiting for something while holding the monitor
128 struct __waitfor_mask_t mask;
129
130 // node used to signal the dtor in a waitfor dtor
131 struct __condition_node_t * dtor_node;
132 };
133
134 struct __monitor_group_t {
135 // currently held monitors
136 __cfa_anonymous_object( __small_array_t($monitor*) );
137
138 // last function that acquired monitors
139 fptr_t func;
140 };
141
142 // Link lists fields
143 // instrusive link field for threads
144 struct __thread_desc_link {
145 struct $thread * next;
146 struct $thread * prev;
147 volatile unsigned long long ts;
148 int preferred;
149 };
150
151 struct $thread {
152 // Core threading fields
153 // context that is switch during a __cfactx_switch
154 struct __stack_context_t context;
155
156 // current execution status for coroutine
157 volatile int ticket;
158 enum __Coroutine_State state:8;
159 enum __Preemption_Reason preempted:8;
160
161 //SKULLDUGGERY errno is not save in the thread data structure because returnToKernel appears to be the only function to require saving and restoring it
162
163 // pointer to the cluster on which the thread is running
164 struct cluster * curr_cluster;
165
166 // Link lists fields
167 // instrusive link field for threads
168 struct __thread_desc_link link;
169
170 // coroutine body used to store context
171 struct $coroutine self_cor;
172
173 // current active context
174 struct $coroutine * curr_cor;
175
176 // monitor body used for mutual exclusion
177 struct $monitor self_mon;
178
179 // pointer to monitor with sufficient lifetime for current monitors
180 struct $monitor * self_mon_p;
181
182 // monitors currently held by this thread
183 struct __monitor_group_t monitors;
184
185 struct {
186 struct $thread * next;
187 struct $thread * prev;
188 } node;
189
190 #ifdef __CFA_DEBUG__
191 // previous function to park/unpark the thread
192 const char * park_caller;
193 int park_result;
194 enum __Coroutine_State park_state;
195 bool park_stale;
196 const char * unpark_caller;
197 int unpark_result;
198 enum __Coroutine_State unpark_state;
199 bool unpark_stale;
200 #endif
201 };
202
203 #ifdef __CFA_DEBUG__
204 void __cfaabi_dbg_record_thrd($thread & this, bool park, const char prev_name[]);
205 #else
206 #define __cfaabi_dbg_record_thrd(x, y, z)
207 #endif
208
209 #ifdef __cforall
210 extern "Cforall" {
211
212 static inline $thread *& get_next( $thread & this ) __attribute__((const)) {
213 return this.link.next;
214 }
215
216 static inline [$thread *&, $thread *& ] __get( $thread & this ) __attribute__((const)) {
217 return this.node.[next, prev];
218 }
219
220 static inline void ?{}(__monitor_group_t & this) {
221 (this.data){0p};
222 (this.size){0};
223 (this.func){NULL};
224 }
225
226 static inline void ?{}(__monitor_group_t & this, struct $monitor ** data, __lock_size_t size, fptr_t func) {
227 (this.data){data};
228 (this.size){size};
229 (this.func){func};
230 }
231
232 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) __attribute__((const)) {
233 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
234 if( lhs.size != rhs.size ) return false;
235 if( lhs.func != rhs.func ) return false;
236
237 // Check that all the monitors match
238 for( int i = 0; i < lhs.size; i++ ) {
239 // If not a match, check next function
240 if( lhs[i] != rhs[i] ) return false;
241 }
242
243 return true;
244 }
245
246 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
247 lhs.data = rhs.data;
248 lhs.size = rhs.size;
249 lhs.func = rhs.func;
250 }
251 }
252 #endif
253
254#endif //_INVOKE_H_
255#else //! defined(__CFA_INVOKE_PRIVATE__)
256#ifndef _INVOKE_PRIVATE_H_
257#define _INVOKE_PRIVATE_H_
258
259 struct machine_context_t {
260 void *SP;
261 void *FP;
262 void *PC;
263 };
264
265 // assembler routines that performs the context switch
266 extern void __cfactx_invoke_stub( void );
267 extern void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) asm ("__cfactx_switch");
268 // void CtxStore ( void * this ) asm ("CtxStore");
269 // void CtxRet ( void * dst ) asm ("CtxRet");
270
271#endif //_INVOKE_PRIVATE_H_
272#endif //! defined(__CFA_INVOKE_PRIVATE__)
273#ifdef __cforall
274}
275#endif
276
277// Local Variables: //
278// mode: c //
279// tab-width: 4 //
280// End: //
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