[8118303] | 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 | // kernel.c -- |
---|
| 8 | // |
---|
| 9 | // Author : Thierry Delisle |
---|
[75f3522] | 10 | // Created On : Tue Jan 17 12:27:26 2017 |
---|
[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
---|
[0f56058] | 12 | // Last Modified On : Mon Apr 9 16:11:46 2018 |
---|
| 13 | // Update Count : 24 |
---|
[8118303] | 14 | // |
---|
| 15 | |
---|
| 16 | //C Includes |
---|
[c84e80a] | 17 | #include <stddef.h> |
---|
[214e8da] | 18 | #include <errno.h> |
---|
[ea8b2f7] | 19 | #include <string.h> |
---|
[eb2e723] | 20 | extern "C" { |
---|
[9d944b2] | 21 | #include <stdio.h> |
---|
[8fcbb4c] | 22 | #include <fenv.h> |
---|
[eb2e723] | 23 | #include <sys/resource.h> |
---|
[58b6d1b] | 24 | #include <signal.h> |
---|
[9d944b2] | 25 | #include <unistd.h> |
---|
[eb2e723] | 26 | } |
---|
[8118303] | 27 | |
---|
| 28 | //CFA Includes |
---|
[58b6d1b] | 29 | #include "time.hfa" |
---|
[73abe95] | 30 | #include "kernel_private.hfa" |
---|
| 31 | #include "preemption.hfa" |
---|
| 32 | #include "startup.hfa" |
---|
[8118303] | 33 | |
---|
| 34 | //Private includes |
---|
| 35 | #define __CFA_INVOKE_PRIVATE__ |
---|
| 36 | #include "invoke.h" |
---|
| 37 | |
---|
[2ac095d] | 38 | //Start and stop routine for the kernel, declared first to make sure they run first |
---|
[c29c342] | 39 | static void kernel_startup(void) __attribute__(( constructor( STARTUP_PRIORITY_KERNEL ) )); |
---|
| 40 | static void kernel_shutdown(void) __attribute__(( destructor ( STARTUP_PRIORITY_KERNEL ) )); |
---|
[2ac095d] | 41 | |
---|
[8def349] | 42 | //----------------------------------------------------------------------------- |
---|
| 43 | // Kernel storage |
---|
[b2f6113] | 44 | KERNEL_STORAGE(cluster, mainCluster); |
---|
| 45 | KERNEL_STORAGE(processor, mainProcessor); |
---|
| 46 | KERNEL_STORAGE(thread_desc, mainThread); |
---|
| 47 | KERNEL_STORAGE(__stack_t, mainThreadCtx); |
---|
[8def349] | 48 | |
---|
[de6319f] | 49 | cluster * mainCluster; |
---|
| 50 | processor * mainProcessor; |
---|
[348006f] | 51 | thread_desc * mainThread; |
---|
[eb2e723] | 52 | |
---|
[ea8b2f7] | 53 | extern "C" { |
---|
| 54 | struct { __dllist_t(cluster) list; __spinlock_t lock; } __cfa_dbg_global_clusters; |
---|
| 55 | } |
---|
[de94a60] | 56 | |
---|
[b2f6113] | 57 | size_t __page_size = 0; |
---|
| 58 | |
---|
[bd98b58] | 59 | //----------------------------------------------------------------------------- |
---|
| 60 | // Global state |
---|
[afc2427] | 61 | thread_local struct KernelThreadData kernelTLS __attribute__ ((tls_model ( "initial-exec" ))) = { |
---|
[b10affd] | 62 | NULL, |
---|
| 63 | NULL, |
---|
| 64 | { 1, false, false } |
---|
| 65 | }; |
---|
[c84e80a] | 66 | |
---|
| 67 | //----------------------------------------------------------------------------- |
---|
[de6319f] | 68 | // Struct to steal stack |
---|
[8def349] | 69 | struct current_stack_info_t { |
---|
[b2f6113] | 70 | __stack_t * storage; // pointer to stack object |
---|
[8def349] | 71 | void *base; // base of stack |
---|
| 72 | void *limit; // stack grows towards stack limit |
---|
| 73 | void *context; // address of cfa_context_t |
---|
[c84e80a] | 74 | }; |
---|
| 75 | |
---|
[242a902] | 76 | void ?{}( current_stack_info_t & this ) { |
---|
[b2f6113] | 77 | __stack_context_t ctx; |
---|
| 78 | CtxGet( ctx ); |
---|
| 79 | this.base = ctx.FP; |
---|
[8def349] | 80 | |
---|
| 81 | rlimit r; |
---|
[132fad4] | 82 | getrlimit( RLIMIT_STACK, &r); |
---|
[69a61d2] | 83 | size_t size = r.rlim_cur; |
---|
[8def349] | 84 | |
---|
[69a61d2] | 85 | this.limit = (void *)(((intptr_t)this.base) - size); |
---|
[9236060] | 86 | this.context = &storage_mainThreadCtx; |
---|
[8def349] | 87 | } |
---|
| 88 | |
---|
[de6319f] | 89 | //----------------------------------------------------------------------------- |
---|
| 90 | // Main thread construction |
---|
[8def349] | 91 | |
---|
[65deb18] | 92 | void ?{}( coroutine_desc & this, current_stack_info_t * info) with( this ) { |
---|
[b2f6113] | 93 | context.errno_ = 0; |
---|
| 94 | stack.storage = info->storage; |
---|
| 95 | with(*stack.storage) { |
---|
| 96 | limit = info->limit; |
---|
| 97 | base = info->base; |
---|
| 98 | } |
---|
[8c01e1b] | 99 | *((intptr_t*)&stack.storage) |= 0x1; |
---|
[65deb18] | 100 | name = "Main Thread"; |
---|
| 101 | state = Start; |
---|
| 102 | starter = NULL; |
---|
[b2f6113] | 103 | last = NULL; |
---|
| 104 | cancellation = NULL; |
---|
[8def349] | 105 | } |
---|
| 106 | |
---|
[65deb18] | 107 | void ?{}( thread_desc & this, current_stack_info_t * info) with( this ) { |
---|
| 108 | self_cor{ info }; |
---|
[82c948c] | 109 | curr_cor = &self_cor; |
---|
[de6319f] | 110 | curr_cluster = mainCluster; |
---|
[82c948c] | 111 | self_mon.owner = &this; |
---|
| 112 | self_mon.recursion = 1; |
---|
| 113 | self_mon_p = &self_mon; |
---|
| 114 | next = NULL; |
---|
[de94a60] | 115 | |
---|
| 116 | node.next = NULL; |
---|
| 117 | node.prev = NULL; |
---|
[a1a17a74] | 118 | doregister(curr_cluster, this); |
---|
[82c948c] | 119 | |
---|
| 120 | monitors{ &self_mon_p, 1, (fptr_t)0 }; |
---|
[8def349] | 121 | } |
---|
[c84e80a] | 122 | |
---|
[8def349] | 123 | //----------------------------------------------------------------------------- |
---|
| 124 | // Processor coroutine |
---|
[de6319f] | 125 | void ?{}(processorCtx_t & this) { |
---|
[39fea2f] | 126 | |
---|
[8def349] | 127 | } |
---|
| 128 | |
---|
[39fea2f] | 129 | // Construct the processor context of non-main processors |
---|
[c29c342] | 130 | static void ?{}(processorCtx_t & this, processor * proc, current_stack_info_t * info) { |
---|
[242a902] | 131 | (this.__cor){ info }; |
---|
| 132 | this.proc = proc; |
---|
[8def349] | 133 | } |
---|
| 134 | |
---|
[c29c342] | 135 | static void start(processor * this); |
---|
[de6319f] | 136 | void ?{}(processor & this, const char * name, cluster & cltr) with( this ) { |
---|
| 137 | this.name = name; |
---|
| 138 | this.cltr = &cltr; |
---|
[c40e7c5] | 139 | terminated{ 0 }; |
---|
| 140 | do_terminate = false; |
---|
| 141 | preemption_alarm = NULL; |
---|
| 142 | pending_preemption = false; |
---|
[094476d] | 143 | runner.proc = &this; |
---|
[8def349] | 144 | |
---|
[85b1deb] | 145 | idleLock{}; |
---|
[6b4cdd3] | 146 | |
---|
[242a902] | 147 | start( &this ); |
---|
[c84e80a] | 148 | } |
---|
| 149 | |
---|
[65deb18] | 150 | void ^?{}(processor & this) with( this ){ |
---|
[ea8b2f7] | 151 | if( ! __atomic_load_n(&do_terminate, __ATOMIC_ACQUIRE) ) { |
---|
[36982fc] | 152 | __cfaabi_dbg_print_safe("Kernel : core %p signaling termination\n", &this); |
---|
[85b1deb] | 153 | |
---|
| 154 | __atomic_store_n(&do_terminate, true, __ATOMIC_RELAXED); |
---|
| 155 | wake( &this ); |
---|
| 156 | |
---|
[65deb18] | 157 | P( terminated ); |
---|
[14a61b5] | 158 | verify( kernelTLS.this_processor != &this); |
---|
[8def349] | 159 | } |
---|
[6b4cdd3] | 160 | |
---|
[85b1deb] | 161 | pthread_join( kernel_thread, NULL ); |
---|
[8def349] | 162 | } |
---|
| 163 | |
---|
[de6319f] | 164 | void ?{}(cluster & this, const char * name, Duration preemption_rate) with( this ) { |
---|
| 165 | this.name = name; |
---|
| 166 | this.preemption_rate = preemption_rate; |
---|
[65deb18] | 167 | ready_queue{}; |
---|
| 168 | ready_queue_lock{}; |
---|
[de94a60] | 169 | |
---|
| 170 | procs{ __get }; |
---|
| 171 | idles{ __get }; |
---|
[a1a17a74] | 172 | threads{ __get }; |
---|
[de94a60] | 173 | |
---|
| 174 | doregister(this); |
---|
[8def349] | 175 | } |
---|
| 176 | |
---|
[242a902] | 177 | void ^?{}(cluster & this) { |
---|
[de94a60] | 178 | unregister(this); |
---|
[c84e80a] | 179 | } |
---|
| 180 | |
---|
[75f3522] | 181 | //============================================================================================= |
---|
| 182 | // Kernel Scheduling logic |
---|
| 183 | //============================================================================================= |
---|
[c29c342] | 184 | static void runThread(processor * this, thread_desc * dst); |
---|
| 185 | static void finishRunning(processor * this); |
---|
| 186 | static void halt(processor * this); |
---|
| 187 | |
---|
[8fcbb4c] | 188 | //Main of the processor contexts |
---|
[83a071f9] | 189 | void main(processorCtx_t & runner) { |
---|
| 190 | processor * this = runner.proc; |
---|
[094476d] | 191 | verify(this); |
---|
[c81ebf9] | 192 | |
---|
[36982fc] | 193 | __cfaabi_dbg_print_safe("Kernel : core %p starting\n", this); |
---|
[8118303] | 194 | |
---|
[de94a60] | 195 | doregister(this->cltr, this); |
---|
| 196 | |
---|
[75f3522] | 197 | { |
---|
[c81ebf9] | 198 | // Setup preemption data |
---|
| 199 | preemption_scope scope = { this }; |
---|
| 200 | |
---|
[36982fc] | 201 | __cfaabi_dbg_print_safe("Kernel : core %p started\n", this); |
---|
[8118303] | 202 | |
---|
[c81ebf9] | 203 | thread_desc * readyThread = NULL; |
---|
[ea8b2f7] | 204 | for( unsigned int spin_count = 0; ! __atomic_load_n(&this->do_terminate, __ATOMIC_SEQ_CST); spin_count++ ) |
---|
[75f3522] | 205 | { |
---|
[c81ebf9] | 206 | readyThread = nextThread( this->cltr ); |
---|
[75f3522] | 207 | |
---|
[c81ebf9] | 208 | if(readyThread) |
---|
| 209 | { |
---|
[14a61b5] | 210 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[4e6fb8e] | 211 | |
---|
[c81ebf9] | 212 | runThread(this, readyThread); |
---|
[75f3522] | 213 | |
---|
[14a61b5] | 214 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[4e6fb8e] | 215 | |
---|
[c81ebf9] | 216 | //Some actions need to be taken from the kernel |
---|
| 217 | finishRunning(this); |
---|
| 218 | |
---|
| 219 | spin_count = 0; |
---|
| 220 | } |
---|
| 221 | else |
---|
| 222 | { |
---|
[ea8b2f7] | 223 | // spin(this, &spin_count); |
---|
| 224 | halt(this); |
---|
[c81ebf9] | 225 | } |
---|
| 226 | } |
---|
| 227 | |
---|
[36982fc] | 228 | __cfaabi_dbg_print_safe("Kernel : core %p stopping\n", this); |
---|
[c84e80a] | 229 | } |
---|
[8118303] | 230 | |
---|
[de94a60] | 231 | unregister(this->cltr, this); |
---|
| 232 | |
---|
[4cedd9f] | 233 | V( this->terminated ); |
---|
[bdeba0b] | 234 | |
---|
[36982fc] | 235 | __cfaabi_dbg_print_safe("Kernel : core %p terminated\n", this); |
---|
[c84e80a] | 236 | } |
---|
| 237 | |
---|
[14a61b5] | 238 | // KERNEL ONLY |
---|
[1c273d0] | 239 | // runThread runs a thread by context switching |
---|
| 240 | // from the processor coroutine to the target thread |
---|
[c29c342] | 241 | static void runThread(processor * this, thread_desc * dst) { |
---|
[82c948c] | 242 | assert(dst->curr_cor); |
---|
[094476d] | 243 | coroutine_desc * proc_cor = get_coroutine(this->runner); |
---|
[82c948c] | 244 | coroutine_desc * thrd_cor = dst->curr_cor; |
---|
[1c273d0] | 245 | |
---|
[14a61b5] | 246 | // Reset the terminating actions here |
---|
[db6f06a] | 247 | this->finish.action_code = No_Action; |
---|
[8fcbb4c] | 248 | |
---|
[14a61b5] | 249 | // Update global state |
---|
| 250 | kernelTLS.this_thread = dst; |
---|
[75f3522] | 251 | |
---|
| 252 | // Context Switch to the thread |
---|
| 253 | ThreadCtxSwitch(proc_cor, thrd_cor); |
---|
| 254 | // when ThreadCtxSwitch returns we are back in the processor coroutine |
---|
| 255 | } |
---|
| 256 | |
---|
[14a61b5] | 257 | // KERNEL_ONLY |
---|
[c29c342] | 258 | static void returnToKernel() { |
---|
[14a61b5] | 259 | coroutine_desc * proc_cor = get_coroutine(kernelTLS.this_processor->runner); |
---|
[212c2187] | 260 | coroutine_desc * thrd_cor = kernelTLS.this_thread->curr_cor; |
---|
[82c948c] | 261 | ThreadCtxSwitch(thrd_cor, proc_cor); |
---|
| 262 | } |
---|
| 263 | |
---|
[14a61b5] | 264 | // KERNEL_ONLY |
---|
[1c273d0] | 265 | // Once a thread has finished running, some of |
---|
[75f3522] | 266 | // its final actions must be executed from the kernel |
---|
[c29c342] | 267 | static void finishRunning(processor * this) with( this->finish ) { |
---|
[09800e9] | 268 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
| 269 | choose( action_code ) { |
---|
| 270 | case No_Action: |
---|
| 271 | break; |
---|
| 272 | case Release: |
---|
[65deb18] | 273 | unlock( *lock ); |
---|
[09800e9] | 274 | case Schedule: |
---|
[65deb18] | 275 | ScheduleThread( thrd ); |
---|
[09800e9] | 276 | case Release_Schedule: |
---|
[65deb18] | 277 | unlock( *lock ); |
---|
| 278 | ScheduleThread( thrd ); |
---|
[09800e9] | 279 | case Release_Multi: |
---|
[65deb18] | 280 | for(int i = 0; i < lock_count; i++) { |
---|
| 281 | unlock( *locks[i] ); |
---|
[0c78741] | 282 | } |
---|
[09800e9] | 283 | case Release_Multi_Schedule: |
---|
[65deb18] | 284 | for(int i = 0; i < lock_count; i++) { |
---|
| 285 | unlock( *locks[i] ); |
---|
[0c78741] | 286 | } |
---|
[65deb18] | 287 | for(int i = 0; i < thrd_count; i++) { |
---|
| 288 | ScheduleThread( thrds[i] ); |
---|
[0c78741] | 289 | } |
---|
[09800e9] | 290 | case Callback: |
---|
| 291 | callback(); |
---|
| 292 | default: |
---|
| 293 | abort("KERNEL ERROR: Unexpected action to run after thread"); |
---|
[8fcbb4c] | 294 | } |
---|
[c84e80a] | 295 | } |
---|
| 296 | |
---|
[14a61b5] | 297 | // KERNEL_ONLY |
---|
[0c92c9f] | 298 | // Context invoker for processors |
---|
| 299 | // This is the entry point for processors (kernel threads) |
---|
| 300 | // It effectively constructs a coroutine by stealing the pthread stack |
---|
[c29c342] | 301 | static void * CtxInvokeProcessor(void * arg) { |
---|
[8def349] | 302 | processor * proc = (processor *) arg; |
---|
[14a61b5] | 303 | kernelTLS.this_processor = proc; |
---|
| 304 | kernelTLS.this_thread = NULL; |
---|
| 305 | kernelTLS.preemption_state.[enabled, disable_count] = [false, 1]; |
---|
[8def349] | 306 | // SKULLDUGGERY: We want to create a context for the processor coroutine |
---|
| 307 | // which is needed for the 2-step context switch. However, there is no reason |
---|
[1c273d0] | 308 | // to waste the perfectly valid stack create by pthread. |
---|
[8def349] | 309 | current_stack_info_t info; |
---|
[b2f6113] | 310 | __stack_t ctx; |
---|
| 311 | info.storage = &ctx; |
---|
[094476d] | 312 | (proc->runner){ proc, &info }; |
---|
[8def349] | 313 | |
---|
[b2f6113] | 314 | __cfaabi_dbg_print_safe("Coroutine : created stack %p\n", get_coroutine(proc->runner)->stack.storage); |
---|
[8fcbb4c] | 315 | |
---|
[0c92c9f] | 316 | //Set global state |
---|
[14a61b5] | 317 | kernelTLS.this_thread = NULL; |
---|
[8def349] | 318 | |
---|
| 319 | //We now have a proper context from which to schedule threads |
---|
[094476d] | 320 | __cfaabi_dbg_print_safe("Kernel : core %p created (%p, %p)\n", proc, &proc->runner, &ctx); |
---|
[8def349] | 321 | |
---|
[1c273d0] | 322 | // SKULLDUGGERY: Since the coroutine doesn't have its own stack, we can't |
---|
| 323 | // resume it to start it like it normally would, it will just context switch |
---|
| 324 | // back to here. Instead directly call the main since we already are on the |
---|
[8def349] | 325 | // appropriate stack. |
---|
[094476d] | 326 | get_coroutine(proc->runner)->state = Active; |
---|
| 327 | main( proc->runner ); |
---|
| 328 | get_coroutine(proc->runner)->state = Halted; |
---|
[8def349] | 329 | |
---|
[0c92c9f] | 330 | // Main routine of the core returned, the core is now fully terminated |
---|
[094476d] | 331 | __cfaabi_dbg_print_safe("Kernel : core %p main ended (%p)\n", proc, &proc->runner); |
---|
[8def349] | 332 | |
---|
| 333 | return NULL; |
---|
[c84e80a] | 334 | } |
---|
| 335 | |
---|
[c29c342] | 336 | static void start(processor * this) { |
---|
[36982fc] | 337 | __cfaabi_dbg_print_safe("Kernel : Starting core %p\n", this); |
---|
[82ff5845] | 338 | |
---|
[8fcbb4c] | 339 | pthread_create( &this->kernel_thread, NULL, CtxInvokeProcessor, (void*)this ); |
---|
[eb2e723] | 340 | |
---|
[36982fc] | 341 | __cfaabi_dbg_print_safe("Kernel : core %p started\n", this); |
---|
[eb2e723] | 342 | } |
---|
| 343 | |
---|
[14a61b5] | 344 | // KERNEL_ONLY |
---|
[b69ea6b] | 345 | void kernel_first_resume(processor * this) { |
---|
[212c2187] | 346 | coroutine_desc * src = mainThread->curr_cor; |
---|
[094476d] | 347 | coroutine_desc * dst = get_coroutine(this->runner); |
---|
[b69ea6b] | 348 | |
---|
[14a61b5] | 349 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[b69ea6b] | 350 | |
---|
[b2f6113] | 351 | __stack_prepare( &dst->stack, 65000 ); |
---|
[094476d] | 352 | CtxStart(&this->runner, CtxInvokeCoroutine); |
---|
[b69ea6b] | 353 | |
---|
[14a61b5] | 354 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[b69ea6b] | 355 | |
---|
| 356 | dst->last = src; |
---|
| 357 | dst->starter = dst->starter ? dst->starter : src; |
---|
| 358 | |
---|
| 359 | // set state of current coroutine to inactive |
---|
| 360 | src->state = src->state == Halted ? Halted : Inactive; |
---|
| 361 | |
---|
| 362 | // SKULLDUGGERY normally interrupts are enable before leaving a coroutine ctxswitch. |
---|
| 363 | // Therefore, when first creating a coroutine, interrupts are enable before calling the main. |
---|
| 364 | // This is consistent with thread creation. However, when creating the main processor coroutine, |
---|
| 365 | // we wan't interrupts to be disabled. Therefore, we double-disable interrupts here so they will |
---|
| 366 | // stay disabled. |
---|
| 367 | disable_interrupts(); |
---|
| 368 | |
---|
| 369 | // context switch to specified coroutine |
---|
[69a61d2] | 370 | verify( dst->context.SP ); |
---|
[b2f6113] | 371 | CtxSwitch( &src->context, &dst->context ); |
---|
[b69ea6b] | 372 | // when CtxSwitch returns we are back in the src coroutine |
---|
| 373 | |
---|
| 374 | // set state of new coroutine to active |
---|
| 375 | src->state = Active; |
---|
| 376 | |
---|
[14a61b5] | 377 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[b69ea6b] | 378 | } |
---|
| 379 | |
---|
[8def349] | 380 | //----------------------------------------------------------------------------- |
---|
| 381 | // Scheduler routines |
---|
[14a61b5] | 382 | |
---|
| 383 | // KERNEL ONLY |
---|
[348006f] | 384 | void ScheduleThread( thread_desc * thrd ) { |
---|
[135b431] | 385 | verify( thrd ); |
---|
[b18830e] | 386 | verify( thrd->self_cor.state != Halted ); |
---|
[1c273d0] | 387 | |
---|
[14a61b5] | 388 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[690f13c] | 389 | |
---|
[4aa2fb2] | 390 | verifyf( thrd->next == NULL, "Expected null got %p", thrd->next ); |
---|
[1c273d0] | 391 | |
---|
[de6319f] | 392 | with( *thrd->curr_cluster ) { |
---|
[65deb18] | 393 | lock ( ready_queue_lock __cfaabi_dbg_ctx2 ); |
---|
[6b4cdd3] | 394 | bool was_empty = !(ready_queue != 0); |
---|
[65deb18] | 395 | append( ready_queue, thrd ); |
---|
| 396 | unlock( ready_queue_lock ); |
---|
[6b4cdd3] | 397 | |
---|
[85b1deb] | 398 | if(was_empty) { |
---|
[6b4cdd3] | 399 | lock (proc_list_lock __cfaabi_dbg_ctx2); |
---|
| 400 | if(idles) { |
---|
[85b1deb] | 401 | wake_fast(idles.head); |
---|
[6b4cdd3] | 402 | } |
---|
| 403 | unlock (proc_list_lock); |
---|
| 404 | } |
---|
[85b1deb] | 405 | else if( struct processor * idle = idles.head ) { |
---|
| 406 | wake_fast(idle); |
---|
| 407 | } |
---|
| 408 | |
---|
[65deb18] | 409 | } |
---|
[1c273d0] | 410 | |
---|
[14a61b5] | 411 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[db6f06a] | 412 | } |
---|
| 413 | |
---|
[14a61b5] | 414 | // KERNEL ONLY |
---|
[65deb18] | 415 | thread_desc * nextThread(cluster * this) with( *this ) { |
---|
[14a61b5] | 416 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[65deb18] | 417 | lock( ready_queue_lock __cfaabi_dbg_ctx2 ); |
---|
| 418 | thread_desc * head = pop_head( ready_queue ); |
---|
| 419 | unlock( ready_queue_lock ); |
---|
[14a61b5] | 420 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[db6f06a] | 421 | return head; |
---|
[eb2e723] | 422 | } |
---|
| 423 | |
---|
[82ff5845] | 424 | void BlockInternal() { |
---|
| 425 | disable_interrupts(); |
---|
[14a61b5] | 426 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 427 | returnToKernel(); |
---|
[14a61b5] | 428 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[36982fc] | 429 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[75f3522] | 430 | } |
---|
| 431 | |
---|
[ea7d2b0] | 432 | void BlockInternal( __spinlock_t * lock ) { |
---|
[82ff5845] | 433 | disable_interrupts(); |
---|
[14a61b5] | 434 | with( *kernelTLS.this_processor ) { |
---|
[de6319f] | 435 | finish.action_code = Release; |
---|
| 436 | finish.lock = lock; |
---|
| 437 | } |
---|
[0b33412] | 438 | |
---|
[afd550c] | 439 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 440 | returnToKernel(); |
---|
[afd550c] | 441 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[0b33412] | 442 | |
---|
[36982fc] | 443 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[db6f06a] | 444 | } |
---|
| 445 | |
---|
[82ff5845] | 446 | void BlockInternal( thread_desc * thrd ) { |
---|
| 447 | disable_interrupts(); |
---|
[14a61b5] | 448 | with( * kernelTLS.this_processor ) { |
---|
[de6319f] | 449 | finish.action_code = Schedule; |
---|
| 450 | finish.thrd = thrd; |
---|
| 451 | } |
---|
[0b33412] | 452 | |
---|
[14a61b5] | 453 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 454 | returnToKernel(); |
---|
[14a61b5] | 455 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[0b33412] | 456 | |
---|
[36982fc] | 457 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[db6f06a] | 458 | } |
---|
| 459 | |
---|
[ea7d2b0] | 460 | void BlockInternal( __spinlock_t * lock, thread_desc * thrd ) { |
---|
[97e3296] | 461 | assert(thrd); |
---|
[82ff5845] | 462 | disable_interrupts(); |
---|
[14a61b5] | 463 | with( * kernelTLS.this_processor ) { |
---|
[de6319f] | 464 | finish.action_code = Release_Schedule; |
---|
| 465 | finish.lock = lock; |
---|
| 466 | finish.thrd = thrd; |
---|
| 467 | } |
---|
[0b33412] | 468 | |
---|
[14a61b5] | 469 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 470 | returnToKernel(); |
---|
[14a61b5] | 471 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[0b33412] | 472 | |
---|
[36982fc] | 473 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[eb2e723] | 474 | } |
---|
| 475 | |
---|
[ea7d2b0] | 476 | void BlockInternal(__spinlock_t * locks [], unsigned short count) { |
---|
[82ff5845] | 477 | disable_interrupts(); |
---|
[14a61b5] | 478 | with( * kernelTLS.this_processor ) { |
---|
[de6319f] | 479 | finish.action_code = Release_Multi; |
---|
| 480 | finish.locks = locks; |
---|
| 481 | finish.lock_count = count; |
---|
| 482 | } |
---|
[0b33412] | 483 | |
---|
[14a61b5] | 484 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 485 | returnToKernel(); |
---|
[14a61b5] | 486 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[0b33412] | 487 | |
---|
[36982fc] | 488 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[0c78741] | 489 | } |
---|
| 490 | |
---|
[ea7d2b0] | 491 | void BlockInternal(__spinlock_t * locks [], unsigned short lock_count, thread_desc * thrds [], unsigned short thrd_count) { |
---|
[82ff5845] | 492 | disable_interrupts(); |
---|
[14a61b5] | 493 | with( *kernelTLS.this_processor ) { |
---|
[de6319f] | 494 | finish.action_code = Release_Multi_Schedule; |
---|
| 495 | finish.locks = locks; |
---|
| 496 | finish.lock_count = lock_count; |
---|
| 497 | finish.thrds = thrds; |
---|
| 498 | finish.thrd_count = thrd_count; |
---|
| 499 | } |
---|
[0b33412] | 500 | |
---|
[14a61b5] | 501 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[82c948c] | 502 | returnToKernel(); |
---|
[14a61b5] | 503 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[0b33412] | 504 | |
---|
[36982fc] | 505 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[0c78741] | 506 | } |
---|
| 507 | |
---|
[09800e9] | 508 | void BlockInternal(__finish_callback_fptr_t callback) { |
---|
| 509 | disable_interrupts(); |
---|
| 510 | with( *kernelTLS.this_processor ) { |
---|
| 511 | finish.action_code = Callback; |
---|
| 512 | finish.callback = callback; |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
| 516 | returnToKernel(); |
---|
| 517 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
| 518 | |
---|
| 519 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
| 520 | } |
---|
| 521 | |
---|
[14a61b5] | 522 | // KERNEL ONLY |
---|
[ea7d2b0] | 523 | void LeaveThread(__spinlock_t * lock, thread_desc * thrd) { |
---|
[14a61b5] | 524 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
| 525 | with( * kernelTLS.this_processor ) { |
---|
[de6319f] | 526 | finish.action_code = thrd ? Release_Schedule : Release; |
---|
| 527 | finish.lock = lock; |
---|
| 528 | finish.thrd = thrd; |
---|
| 529 | } |
---|
[f2b12406] | 530 | |
---|
[82c948c] | 531 | returnToKernel(); |
---|
[f2b12406] | 532 | } |
---|
| 533 | |
---|
[fa21ac9] | 534 | //============================================================================================= |
---|
| 535 | // Kernel Setup logic |
---|
| 536 | //============================================================================================= |
---|
[eb2e723] | 537 | //----------------------------------------------------------------------------- |
---|
| 538 | // Kernel boot procedures |
---|
[c29c342] | 539 | static void kernel_startup(void) { |
---|
[14a61b5] | 540 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[36982fc] | 541 | __cfaabi_dbg_print_safe("Kernel : Starting\n"); |
---|
[eb2e723] | 542 | |
---|
[b2f6113] | 543 | __page_size = sysconf( _SC_PAGESIZE ); |
---|
| 544 | |
---|
[ea8b2f7] | 545 | __cfa_dbg_global_clusters.list{ __get }; |
---|
| 546 | __cfa_dbg_global_clusters.lock{}; |
---|
[de94a60] | 547 | |
---|
[de6319f] | 548 | // Initialize the main cluster |
---|
| 549 | mainCluster = (cluster *)&storage_mainCluster; |
---|
| 550 | (*mainCluster){"Main Cluster"}; |
---|
| 551 | |
---|
| 552 | __cfaabi_dbg_print_safe("Kernel : Main cluster ready\n"); |
---|
| 553 | |
---|
[eb2e723] | 554 | // Start by initializing the main thread |
---|
[1c273d0] | 555 | // SKULLDUGGERY: the mainThread steals the process main thread |
---|
[969b3fe] | 556 | // which will then be scheduled by the mainProcessor normally |
---|
| 557 | mainThread = (thread_desc *)&storage_mainThread; |
---|
[8fcbb4c] | 558 | current_stack_info_t info; |
---|
[b2f6113] | 559 | info.storage = (__stack_t*)&storage_mainThreadCtx; |
---|
[83a071f9] | 560 | (*mainThread){ &info }; |
---|
[eb2e723] | 561 | |
---|
[36982fc] | 562 | __cfaabi_dbg_print_safe("Kernel : Main thread ready\n"); |
---|
[fa21ac9] | 563 | |
---|
[bd98b58] | 564 | |
---|
[de6319f] | 565 | |
---|
| 566 | // Construct the processor context of the main processor |
---|
| 567 | void ?{}(processorCtx_t & this, processor * proc) { |
---|
| 568 | (this.__cor){ "Processor" }; |
---|
| 569 | this.__cor.starter = NULL; |
---|
| 570 | this.proc = proc; |
---|
| 571 | } |
---|
| 572 | |
---|
| 573 | void ?{}(processor & this) with( this ) { |
---|
| 574 | name = "Main Processor"; |
---|
| 575 | cltr = mainCluster; |
---|
| 576 | terminated{ 0 }; |
---|
| 577 | do_terminate = false; |
---|
| 578 | preemption_alarm = NULL; |
---|
| 579 | pending_preemption = false; |
---|
| 580 | kernel_thread = pthread_self(); |
---|
| 581 | |
---|
| 582 | runner{ &this }; |
---|
| 583 | __cfaabi_dbg_print_safe("Kernel : constructed main processor context %p\n", &runner); |
---|
| 584 | } |
---|
[fa21ac9] | 585 | |
---|
[969b3fe] | 586 | // Initialize the main processor and the main processor ctx |
---|
[eb2e723] | 587 | // (the coroutine that contains the processing control flow) |
---|
[969b3fe] | 588 | mainProcessor = (processor *)&storage_mainProcessor; |
---|
[de6319f] | 589 | (*mainProcessor){}; |
---|
[eb2e723] | 590 | |
---|
[dcb42b8] | 591 | //initialize the global state variables |
---|
[14a61b5] | 592 | kernelTLS.this_processor = mainProcessor; |
---|
| 593 | kernelTLS.this_thread = mainThread; |
---|
[eb2e723] | 594 | |
---|
[82ff5845] | 595 | // Enable preemption |
---|
| 596 | kernel_start_preemption(); |
---|
| 597 | |
---|
[969b3fe] | 598 | // Add the main thread to the ready queue |
---|
| 599 | // once resume is called on mainProcessor->runner the mainThread needs to be scheduled like any normal thread |
---|
| 600 | ScheduleThread(mainThread); |
---|
| 601 | |
---|
| 602 | // SKULLDUGGERY: Force a context switch to the main processor to set the main thread's context to the current UNIX |
---|
[dcb42b8] | 603 | // context. Hence, the main thread does not begin through CtxInvokeThread, like all other threads. The trick here is that |
---|
[1c273d0] | 604 | // mainThread is on the ready queue when this call is made. |
---|
[14a61b5] | 605 | kernel_first_resume( kernelTLS.this_processor ); |
---|
[eb2e723] | 606 | |
---|
[dcb42b8] | 607 | |
---|
| 608 | |
---|
| 609 | // THE SYSTEM IS NOW COMPLETELY RUNNING |
---|
[36982fc] | 610 | __cfaabi_dbg_print_safe("Kernel : Started\n--------------------------------------------------\n\n"); |
---|
[82ff5845] | 611 | |
---|
[14a61b5] | 612 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[36982fc] | 613 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[afd550c] | 614 | verify( TL_GET( preemption_state.enabled ) ); |
---|
[eb2e723] | 615 | } |
---|
| 616 | |
---|
[c29c342] | 617 | static void kernel_shutdown(void) { |
---|
[36982fc] | 618 | __cfaabi_dbg_print_safe("\n--------------------------------------------------\nKernel : Shutting down\n"); |
---|
[eb2e723] | 619 | |
---|
[afd550c] | 620 | verify( TL_GET( preemption_state.enabled ) ); |
---|
[4e6fb8e] | 621 | disable_interrupts(); |
---|
[14a61b5] | 622 | verify( ! kernelTLS.preemption_state.enabled ); |
---|
[4e6fb8e] | 623 | |
---|
[969b3fe] | 624 | // SKULLDUGGERY: Notify the mainProcessor it needs to terminates. |
---|
[dcb42b8] | 625 | // When its coroutine terminates, it return control to the mainThread |
---|
| 626 | // which is currently here |
---|
[ea8b2f7] | 627 | __atomic_store_n(&mainProcessor->do_terminate, true, __ATOMIC_RELEASE); |
---|
[82c948c] | 628 | returnToKernel(); |
---|
[ea8b2f7] | 629 | mainThread->self_cor.state = Halted; |
---|
[eb2e723] | 630 | |
---|
[dcb42b8] | 631 | // THE SYSTEM IS NOW COMPLETELY STOPPED |
---|
[eb2e723] | 632 | |
---|
[82ff5845] | 633 | // Disable preemption |
---|
| 634 | kernel_stop_preemption(); |
---|
| 635 | |
---|
[969b3fe] | 636 | // Destroy the main processor and its context in reverse order of construction |
---|
[dcb42b8] | 637 | // These were manually constructed so we need manually destroy them |
---|
[094476d] | 638 | ^(mainProcessor->runner){}; |
---|
[969b3fe] | 639 | ^(mainProcessor){}; |
---|
[eb2e723] | 640 | |
---|
[dcb42b8] | 641 | // Final step, destroy the main thread since it is no longer needed |
---|
| 642 | // Since we provided a stack to this taxk it will not destroy anything |
---|
[eb2e723] | 643 | ^(mainThread){}; |
---|
| 644 | |
---|
[ea8b2f7] | 645 | ^(__cfa_dbg_global_clusters.list){}; |
---|
| 646 | ^(__cfa_dbg_global_clusters.lock){}; |
---|
[a1a17a74] | 647 | |
---|
[36982fc] | 648 | __cfaabi_dbg_print_safe("Kernel : Shutdown complete\n"); |
---|
[9d944b2] | 649 | } |
---|
| 650 | |
---|
[14a61b5] | 651 | //============================================================================================= |
---|
| 652 | // Kernel Quiescing |
---|
| 653 | //============================================================================================= |
---|
[c29c342] | 654 | static void halt(processor * this) with( *this ) { |
---|
[85b1deb] | 655 | // verify( ! __atomic_load_n(&do_terminate, __ATOMIC_SEQ_CST) ); |
---|
[ea8b2f7] | 656 | |
---|
[6b4cdd3] | 657 | with( *cltr ) { |
---|
| 658 | lock (proc_list_lock __cfaabi_dbg_ctx2); |
---|
| 659 | remove (procs, *this); |
---|
| 660 | push_front(idles, *this); |
---|
| 661 | unlock (proc_list_lock); |
---|
| 662 | } |
---|
[14a61b5] | 663 | |
---|
[6b4cdd3] | 664 | __cfaabi_dbg_print_safe("Kernel : Processor %p ready to sleep\n", this); |
---|
[14a61b5] | 665 | |
---|
[85b1deb] | 666 | wait( idleLock ); |
---|
[14a61b5] | 667 | |
---|
[6b4cdd3] | 668 | __cfaabi_dbg_print_safe("Kernel : Processor %p woke up and ready to run\n", this); |
---|
[14a61b5] | 669 | |
---|
[6b4cdd3] | 670 | with( *cltr ) { |
---|
| 671 | lock (proc_list_lock __cfaabi_dbg_ctx2); |
---|
| 672 | remove (idles, *this); |
---|
| 673 | push_front(procs, *this); |
---|
| 674 | unlock (proc_list_lock); |
---|
| 675 | } |
---|
| 676 | } |
---|
| 677 | |
---|
[dbe9b08] | 678 | //============================================================================================= |
---|
| 679 | // Unexpected Terminating logic |
---|
| 680 | //============================================================================================= |
---|
[ea7d2b0] | 681 | static __spinlock_t kernel_abort_lock; |
---|
[9d944b2] | 682 | static bool kernel_abort_called = false; |
---|
| 683 | |
---|
[afd550c] | 684 | void * kernel_abort(void) __attribute__ ((__nothrow__)) { |
---|
[9d944b2] | 685 | // abort cannot be recursively entered by the same or different processors because all signal handlers return when |
---|
| 686 | // the globalAbort flag is true. |
---|
[36982fc] | 687 | lock( kernel_abort_lock __cfaabi_dbg_ctx2 ); |
---|
[9d944b2] | 688 | |
---|
| 689 | // first task to abort ? |
---|
[de94a60] | 690 | if ( kernel_abort_called ) { // not first task to abort ? |
---|
[ea7d2b0] | 691 | unlock( kernel_abort_lock ); |
---|
[1c273d0] | 692 | |
---|
[9d944b2] | 693 | sigset_t mask; |
---|
| 694 | sigemptyset( &mask ); |
---|
[de94a60] | 695 | sigaddset( &mask, SIGALRM ); // block SIGALRM signals |
---|
| 696 | sigsuspend( &mask ); // block the processor to prevent further damage during abort |
---|
| 697 | _exit( EXIT_FAILURE ); // if processor unblocks before it is killed, terminate it |
---|
| 698 | } |
---|
| 699 | else { |
---|
| 700 | kernel_abort_called = true; |
---|
| 701 | unlock( kernel_abort_lock ); |
---|
[9d944b2] | 702 | } |
---|
| 703 | |
---|
[14a61b5] | 704 | return kernelTLS.this_thread; |
---|
[9d944b2] | 705 | } |
---|
| 706 | |
---|
| 707 | void kernel_abort_msg( void * kernel_data, char * abort_text, int abort_text_size ) { |
---|
| 708 | thread_desc * thrd = kernel_data; |
---|
| 709 | |
---|
[de94a60] | 710 | if(thrd) { |
---|
| 711 | int len = snprintf( abort_text, abort_text_size, "Error occurred while executing thread %.256s (%p)", thrd->self_cor.name, thrd ); |
---|
[36982fc] | 712 | __cfaabi_dbg_bits_write( abort_text, len ); |
---|
[de94a60] | 713 | |
---|
[212c2187] | 714 | if ( &thrd->self_cor != thrd->curr_cor ) { |
---|
| 715 | len = snprintf( abort_text, abort_text_size, " in coroutine %.256s (%p).\n", thrd->curr_cor->name, thrd->curr_cor ); |
---|
[de94a60] | 716 | __cfaabi_dbg_bits_write( abort_text, len ); |
---|
| 717 | } |
---|
| 718 | else { |
---|
| 719 | __cfaabi_dbg_bits_write( ".\n", 2 ); |
---|
| 720 | } |
---|
[1c273d0] | 721 | } |
---|
[9d944b2] | 722 | else { |
---|
[de94a60] | 723 | int len = snprintf( abort_text, abort_text_size, "Error occurred outside of any thread.\n" ); |
---|
[639991a] | 724 | __cfaabi_dbg_bits_write( abort_text, len ); |
---|
[9d944b2] | 725 | } |
---|
| 726 | } |
---|
| 727 | |
---|
[2b8bc41] | 728 | int kernel_abort_lastframe( void ) __attribute__ ((__nothrow__)) { |
---|
[14a61b5] | 729 | return get_coroutine(kernelTLS.this_thread) == get_coroutine(mainThread) ? 4 : 2; |
---|
[2b8bc41] | 730 | } |
---|
| 731 | |
---|
[de94a60] | 732 | static __spinlock_t kernel_debug_lock; |
---|
| 733 | |
---|
[9d944b2] | 734 | extern "C" { |
---|
[36982fc] | 735 | void __cfaabi_dbg_bits_acquire() { |
---|
| 736 | lock( kernel_debug_lock __cfaabi_dbg_ctx2 ); |
---|
[9d944b2] | 737 | } |
---|
| 738 | |
---|
[36982fc] | 739 | void __cfaabi_dbg_bits_release() { |
---|
[ea7d2b0] | 740 | unlock( kernel_debug_lock ); |
---|
[9d944b2] | 741 | } |
---|
[8118303] | 742 | } |
---|
| 743 | |
---|
[fa21ac9] | 744 | //============================================================================================= |
---|
| 745 | // Kernel Utilities |
---|
| 746 | //============================================================================================= |
---|
[bd98b58] | 747 | //----------------------------------------------------------------------------- |
---|
| 748 | // Locks |
---|
[242a902] | 749 | void ?{}( semaphore & this, int count = 1 ) { |
---|
| 750 | (this.lock){}; |
---|
| 751 | this.count = count; |
---|
| 752 | (this.waiting){}; |
---|
[db6f06a] | 753 | } |
---|
[242a902] | 754 | void ^?{}(semaphore & this) {} |
---|
[db6f06a] | 755 | |
---|
[65deb18] | 756 | void P(semaphore & this) with( this ){ |
---|
| 757 | lock( lock __cfaabi_dbg_ctx2 ); |
---|
| 758 | count -= 1; |
---|
| 759 | if ( count < 0 ) { |
---|
[bdeba0b] | 760 | // queue current task |
---|
[14a61b5] | 761 | append( waiting, kernelTLS.this_thread ); |
---|
[bdeba0b] | 762 | |
---|
| 763 | // atomically release spin lock and block |
---|
[65deb18] | 764 | BlockInternal( &lock ); |
---|
[8def349] | 765 | } |
---|
[4e6fb8e] | 766 | else { |
---|
[65deb18] | 767 | unlock( lock ); |
---|
[4e6fb8e] | 768 | } |
---|
[bd98b58] | 769 | } |
---|
| 770 | |
---|
[65deb18] | 771 | void V(semaphore & this) with( this ) { |
---|
[bdeba0b] | 772 | thread_desc * thrd = NULL; |
---|
[65deb18] | 773 | lock( lock __cfaabi_dbg_ctx2 ); |
---|
| 774 | count += 1; |
---|
| 775 | if ( count <= 0 ) { |
---|
[bdeba0b] | 776 | // remove task at head of waiting list |
---|
[65deb18] | 777 | thrd = pop_head( waiting ); |
---|
[bd98b58] | 778 | } |
---|
[bdeba0b] | 779 | |
---|
[65deb18] | 780 | unlock( lock ); |
---|
[bdeba0b] | 781 | |
---|
| 782 | // make new owner |
---|
| 783 | WakeThread( thrd ); |
---|
[bd98b58] | 784 | } |
---|
| 785 | |
---|
[f7d6bb0] | 786 | //----------------------------------------------------------------------------- |
---|
[de94a60] | 787 | // Global Queues |
---|
| 788 | void doregister( cluster & cltr ) { |
---|
[ea8b2f7] | 789 | lock ( __cfa_dbg_global_clusters.lock __cfaabi_dbg_ctx2); |
---|
| 790 | push_front( __cfa_dbg_global_clusters.list, cltr ); |
---|
| 791 | unlock ( __cfa_dbg_global_clusters.lock ); |
---|
[de94a60] | 792 | } |
---|
[f7d6bb0] | 793 | |
---|
[de94a60] | 794 | void unregister( cluster & cltr ) { |
---|
[ea8b2f7] | 795 | lock ( __cfa_dbg_global_clusters.lock __cfaabi_dbg_ctx2); |
---|
| 796 | remove( __cfa_dbg_global_clusters.list, cltr ); |
---|
| 797 | unlock( __cfa_dbg_global_clusters.lock ); |
---|
[de94a60] | 798 | } |
---|
[f7d6bb0] | 799 | |
---|
[a1a17a74] | 800 | void doregister( cluster * cltr, thread_desc & thrd ) { |
---|
| 801 | lock (cltr->thread_list_lock __cfaabi_dbg_ctx2); |
---|
| 802 | push_front(cltr->threads, thrd); |
---|
| 803 | unlock (cltr->thread_list_lock); |
---|
| 804 | } |
---|
| 805 | |
---|
| 806 | void unregister( cluster * cltr, thread_desc & thrd ) { |
---|
| 807 | lock (cltr->thread_list_lock __cfaabi_dbg_ctx2); |
---|
| 808 | remove(cltr->threads, thrd ); |
---|
| 809 | unlock(cltr->thread_list_lock); |
---|
| 810 | } |
---|
[9181f1d] | 811 | |
---|
[de94a60] | 812 | void doregister( cluster * cltr, processor * proc ) { |
---|
[639991a] | 813 | lock (cltr->proc_list_lock __cfaabi_dbg_ctx2); |
---|
| 814 | push_front(cltr->procs, *proc); |
---|
| 815 | unlock (cltr->proc_list_lock); |
---|
[de94a60] | 816 | } |
---|
| 817 | |
---|
| 818 | void unregister( cluster * cltr, processor * proc ) { |
---|
[639991a] | 819 | lock (cltr->proc_list_lock __cfaabi_dbg_ctx2); |
---|
| 820 | remove(cltr->procs, *proc ); |
---|
| 821 | unlock(cltr->proc_list_lock); |
---|
[de94a60] | 822 | } |
---|
| 823 | |
---|
| 824 | //----------------------------------------------------------------------------- |
---|
| 825 | // Debug |
---|
| 826 | __cfaabi_dbg_debug_do( |
---|
[1997b4e] | 827 | extern "C" { |
---|
| 828 | void __cfaabi_dbg_record(__spinlock_t & this, const char * prev_name) { |
---|
| 829 | this.prev_name = prev_name; |
---|
| 830 | this.prev_thrd = kernelTLS.this_thread; |
---|
| 831 | } |
---|
[9181f1d] | 832 | } |
---|
[f7d6bb0] | 833 | ) |
---|
[8118303] | 834 | // Local Variables: // |
---|
| 835 | // mode: c // |
---|
| 836 | // tab-width: 4 // |
---|
| 837 | // End: // |
---|