source: src/libcfa/concurrency/invoke.c @ 4e6fb8e

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc
Last change on this file since 4e6fb8e was 4e6fb8e, checked in by Thierry Delisle <tdelisle@…>, 7 years ago

Preemption with some bug fixes and much more debugging, still not working at 100%

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File size: 5.4 KB
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[0157ca7]1//                              -*- Mode: C -*-
[8def349]2//
3// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
4//
5// The contents of this file are covered under the licence agreement in the
6// file "LICENCE" distributed with Cforall.
7//
8// invoke.c --
9//
10// Author           : Thierry Delisle
11// Created On       : Tue Jan 17 12:27:26 2016
12// Last Modified By : Thierry Delisle
13// Last Modified On : --
14// Update Count     : 0
15//
[78b3f52]16
17#include <stdbool.h>
18#include <stdlib.h>
19#include <stdio.h>
20
[d9c44c3]21#include "libhdr.h"
[78b3f52]22#include "invoke.h"
23
[5c81105]24#define __CFA_INVOKE_PRIVATE__
25#include "invoke.h"
[78b3f52]26
27// magically invoke the "main" of the most derived class
28// Called from the kernel when starting a coroutine or task so must switch back to user mode.
[5c81105]29
[0c92c9f]30extern void __suspend_internal(void);
[cb0e6de]31extern void __leave_monitor_desc( struct monitor_desc * this );
[82ff5845]32extern void disable_interrupts();
[4e6fb8e]33extern void enable_interrupts( const char * );
[78b3f52]34
[b58a5772]35void CtxInvokeCoroutine(
[80d9e49]36      void (*main)(void *), 
[c3acb841]37      struct coroutine_desc *(*get_coroutine)(void *), 
[80d9e49]38      void *this
39) {
[c84e80a]40      // LIB_DEBUG_PRINTF("Invoke Coroutine : Received %p (main %p, get_c %p)\n", this, main, get_coroutine);
[80d9e49]41
[c3acb841]42      struct coroutine_desc* cor = get_coroutine( this );
[80d9e49]43
44      if(cor->state == Primed) {
[0c92c9f]45            __suspend_internal();
[80d9e49]46      }
[78b3f52]47
48      cor->state = Active;
49
[80d9e49]50      main( this );
[8118303]51
[ee897e4b]52      cor->state = Halted;
[8f49a54]53
[8118303]54      //Final suspend, should never return
[0c92c9f]55      __suspend_internal();
56      abortf("Resumed dead coroutine");
[8118303]57}
58
59void CtxInvokeThread(
[9f1695b]60      void (*dtor)(void *), 
[8118303]61      void (*main)(void *), 
[348006f]62      struct thread_desc *(*get_thread)(void *), 
[8118303]63      void *this
64) {
[0c92c9f]65      __suspend_internal();
[8118303]66
[348006f]67      struct thread_desc* thrd = get_thread( this );
[17af7d1]68      struct coroutine_desc* cor = &thrd->cor;
[cb0e6de]69      struct monitor_desc* mon = &thrd->mon;
[8118303]70      cor->state = Active;
[4e6fb8e]71      enable_interrupts( __PRETTY_FUNCTION__ );
[8118303]72
[c84e80a]73      // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this);
[8118303]74      main( this );
75
[82ff5845]76      disable_interrupts();
[cb0e6de]77      __leave_monitor_desc( mon );
[c84e80a]78
[8118303]79      //Final suspend, should never return
[0c92c9f]80      __suspend_internal();
81      abortf("Resumed dead thread");
[78b3f52]82}
83
[5c81105]84
[b58a5772]85void CtxStart(
[80d9e49]86      void (*main)(void *), 
[c3acb841]87      struct coroutine_desc *(*get_coroutine)(void *), 
[80d9e49]88      void *this, 
89      void (*invoke)(void *)
90) {
[c84e80a]91      // LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (main %p) to invoke (%p) from start (%p)\n", this, main, invoke, CtxStart);
[5c81105]92
[80d9e49]93      struct coStack_t* stack = &get_coroutine( this )->stack;
[78b3f52]94
[d9c44c3]95#if defined( __i386__ )
96
97        struct FakeStack {
98            void *fixedRegisters[3];                    // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant)
[17af7d1]99            uint32_t mxcr;                        // SSE Status and Control bits (control bits are preserved across function calls)
100          uint16_t fcw;                         // X97 FPU control word (preserved across function calls)
101            void *rturn;                          // where to go on return from uSwitch
[d9c44c3]102            void *dummyReturn;                          // fake return compiler would have pushed on call to uInvoke
[80d9e49]103            void *argument[3];                          // for 16-byte ABI, 16-byte alignment starts here
104            void *padding;                              // padding to force 16-byte alignment, as "base" is 16-byte aligned
[d9c44c3]105        };
106
107        ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
108        ((struct machine_context_t *)stack->context)->FP = NULL;                // terminate stack with NULL fp
109
110        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
[80d9e49]111        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this;     // argument to invoke
[d9c44c3]112        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke;
[17af7d1]113      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520
114      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F;  //Vol. 1 8-7
[d9c44c3]115
116#elif defined( __x86_64__ )
117
[78b3f52]118      struct FakeStack {
[17af7d1]119            void *fixedRegisters[5];            // fixed registers rbx, r12, r13, r14, r15
120            uint32_t mxcr;                      // SSE Status and Control bits (control bits are preserved across function calls)
121            uint16_t fcw;                       // X97 FPU control word (preserved across function calls)
122            void *rturn;                        // where to go on return from uSwitch
123            void *dummyReturn;                  // NULL return address to provide proper alignment
[d9c44c3]124      };
[78b3f52]125
126      ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
127      ((struct machine_context_t *)stack->context)->FP = NULL;          // terminate stack with NULL fp
128
129      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
[b58a5772]130      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub;
[80d9e49]131      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this;
[5c81105]132      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke;
[8761006c]133      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520
134      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F;  //Vol. 1 8-7
[d9c44c3]135#else
136      #error Only __i386__ and __x86_64__ is supported for threads in cfa
137#endif
[e4745d7a]138}
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