source: libcfa/src/concurrency/invoke.c @ c7a900a

arm-ehjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-expr
Last change on this file since c7a900a was c7a900a, checked in by Thierry Delisle <tdelisle@…>, 22 months ago

More renames and clean-ups

  • Property mode set to 100644
File size: 5.1 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.c --
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 : Fri Feb  9 16:37:42 2018
13// Update Count     : 5
14//
15
16#define __cforall_thread__
17
18#include <stdbool.h>
19#include <stdlib.h>
20#include <stdio.h>
21#include <unwind.h>
22
23#include "invoke.h"
24
25#define __CFA_INVOKE_PRIVATE__
26#include "invoke.h"
27
28// magically invoke the "main" of the most derived class
29// Called from the kernel when starting a coroutine or task so must switch back to user mode.
30
31extern struct coroutine_desc * __cfactx_cor_finish(void);
32extern void __cfactx_cor_leave ( struct coroutine_desc * );
33extern void __cfactx_thrd_leave();
34
35extern void disable_interrupts() OPTIONAL_THREAD;
36extern void enable_interrupts( __cfaabi_dbg_ctx_param );
37
38void __cfactx_invoke_coroutine(
39        void (*main)(void *),
40        void *this
41) {
42        // Finish setting up the coroutine by setting its state
43        struct coroutine_desc * cor = __cfactx_cor_finish();
44
45        // Call the main of the coroutine
46        main( this );
47
48        //Final suspend, should never return
49        __cfactx_cor_leave( cor );
50        __cabi_abort( "Resumed dead coroutine" );
51}
52
53static _Unwind_Reason_Code __cfactx_coroutine_unwindstop(
54        __attribute((__unused__)) int version,
55        _Unwind_Action actions,
56        __attribute((__unused__)) _Unwind_Exception_Class exceptionClass,
57        __attribute((__unused__)) struct _Unwind_Exception * unwind_exception,
58        __attribute((__unused__)) struct _Unwind_Context * context,
59        void * param
60) {
61        if( actions & _UA_END_OF_STACK  ) {
62                // We finished unwinding the coroutine,
63                // leave it
64                __cfactx_cor_leave( param );
65                __cabi_abort( "Resumed dead coroutine" );
66        }
67        if( actions & _UA_CLEANUP_PHASE ) return _URC_NO_REASON;
68
69        return _URC_FATAL_PHASE2_ERROR;
70}
71
72void __cfactx_coroutine_unwind(struct _Unwind_Exception * storage, struct coroutine_desc * cor) __attribute__ ((__noreturn__));
73void __cfactx_coroutine_unwind(struct _Unwind_Exception * storage, struct coroutine_desc * cor) {
74        _Unwind_Reason_Code ret = _Unwind_ForcedUnwind( storage, __cfactx_coroutine_unwindstop, cor );
75        printf("UNWIND ERROR %d after force unwind\n", ret);
76        abort();
77}
78
79void __cfactx_invoke_thread(
80        void (*main)(void *),
81        void *this
82) {
83        // Officially start the thread by enabling preemption
84        enable_interrupts( __cfaabi_dbg_ctx );
85
86        // Call the main of the thread
87        main( this );
88
89        // To exit a thread we must :
90        // 1 - Mark it as halted
91        // 2 - Leave its monitor
92        // 3 - Disable the interupts
93        // 4 - Final suspend
94        // The order of these 4 operations is very important
95        //Final suspend, should never return
96        __cfactx_thrd_leave();
97        __cabi_abort( "Resumed dead thread" );
98}
99
100void __cfactx_start(
101        void (*main)(void *),
102        struct coroutine_desc * cor,
103        void *this,
104        void (*invoke)(void *)
105) {
106        struct __stack_t * stack = cor->stack.storage;
107
108#if defined( __i386 )
109
110        struct FakeStack {
111            void *fixedRegisters[3];              // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant)
112            void *rturn;                          // where to go on return from uSwitch
113            void *dummyReturn;                    // fake return compiler would have pushed on call to uInvoke
114            void *argument[3];                    // for 16-byte ABI, 16-byte alignment starts here
115            void *padding;                        // padding to force 16-byte alignment, as "base" is 16-byte aligned
116        };
117
118        cor->context.SP = (char *)stack->base - sizeof( struct FakeStack );
119        cor->context.FP = NULL;         // terminate stack with NULL fp
120
121        struct FakeStack *fs = (struct FakeStack *)cor->context.SP;
122
123        fs->dummyReturn = NULL;
124        fs->argument[0] = main;     // argument to invoke
125        fs->argument[1] = this;     // argument to invoke
126        fs->rturn = invoke;
127
128#elif defined( __x86_64 )
129
130        struct FakeStack {
131                void *fixedRegisters[5];            // fixed registers rbx, r12, r13, r14, r15
132                void *rturn;                        // where to go on return from uSwitch
133                void *dummyReturn;                  // NULL return address to provide proper alignment
134        };
135
136        cor->context.SP = (char *)stack->base - sizeof( struct FakeStack );
137        cor->context.FP = NULL;         // terminate stack with NULL fp
138
139        struct FakeStack *fs = (struct FakeStack *)cor->context.SP;
140
141        fs->dummyReturn = NULL;
142        fs->rturn = __cfactx_invoke_stub;
143        fs->fixedRegisters[0] = main;
144        fs->fixedRegisters[1] = this;
145        fs->fixedRegisters[2] = invoke;
146
147#elif defined( __ARM_ARCH )
148#error ARM needs to be upgrade to use to parameters like X86/X64 (A.K.A. : I broke this and do not know how to fix it)
149        struct FakeStack {
150                float fpRegs[16];                       // floating point registers
151                void *intRegs[9];                       // integer/pointer registers
152                void *arg[2];                           // placeholder for this pointer
153        };
154
155        cor->context.SP = (char *)stack->base - sizeof( struct FakeStack );
156        cor->context.FP = NULL;
157
158        struct FakeStack *fs = (struct FakeStack *)cor->context.SP;
159
160        fs->intRegs[8] = __cfactx_invoke_stub;
161        fs->arg[0] = this;
162        fs->arg[1] = invoke;
163
164#else
165        #error uknown hardware architecture
166#endif
167}
168
169// Local Variables: //
170// mode: c //
171// tab-width: 4 //
172// End: //
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