1 /* Copyright (c) 2008-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "internal_config.h"
8 #include "mc_object_info.h"
9 #include "mc_private.h"
10 #include "smpi/private.h"
11 #include "mc/mc_snapshot.h"
12 #include "mc_ignore.h"
13 #include "mc_protocol.h"
14 #include "mc_client.h"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_ignore, mc,
17 "Logging specific to MC ignore mechanism");
20 /**************************** Global variables ******************************/
21 // Those structures live with the MCer and should be moved in the model_checker
22 // structure but they are currently used before the MC initialisation
23 // (in standalone mode).
25 extern xbt_dynar_t mc_heap_comparison_ignore;
26 extern xbt_dynar_t stacks_areas;
28 /**************************** Structures ******************************/
29 typedef struct s_mc_stack_ignore_variable {
32 } s_mc_stack_ignore_variable_t, *mc_stack_ignore_variable_t;
34 /**************************** Free functions ******************************/
36 static void stack_ignore_variable_free(mc_stack_ignore_variable_t v)
38 xbt_free(v->var_name);
43 static void stack_ignore_variable_free_voidp(void *v)
45 stack_ignore_variable_free((mc_stack_ignore_variable_t) * (void **) v);
48 void heap_ignore_region_free(mc_heap_ignore_region_t r)
53 void heap_ignore_region_free_voidp(void *r)
55 heap_ignore_region_free((mc_heap_ignore_region_t) * (void **) r);
58 static void checkpoint_ignore_region_free(mc_checkpoint_ignore_region_t r)
63 static void checkpoint_ignore_region_free_voidp(void *r)
65 checkpoint_ignore_region_free((mc_checkpoint_ignore_region_t) * (void **) r);
68 xbt_dynar_t MC_checkpoint_ignore_new(void)
70 return xbt_dynar_new(sizeof(mc_checkpoint_ignore_region_t),
71 checkpoint_ignore_region_free_voidp);
74 /***********************************************************************/
76 void MC_heap_region_ignore_insert(mc_heap_ignore_region_t region)
78 if (mc_heap_comparison_ignore == NULL) {
79 mc_heap_comparison_ignore =
80 xbt_dynar_new(sizeof(mc_heap_ignore_region_t),
81 heap_ignore_region_free_voidp);
82 xbt_dynar_push(mc_heap_comparison_ignore, ®ion);
86 unsigned int cursor = 0;
87 mc_heap_ignore_region_t current_region = NULL;
89 int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
91 // Find the position where we want to insert the mc_heap_ignore_region_t:
92 while (start <= end) {
93 cursor = (start + end) / 2;
95 (mc_heap_ignore_region_t) xbt_dynar_get_as(mc_heap_comparison_ignore,
97 mc_heap_ignore_region_t);
98 if (current_region->address == region->address) {
99 heap_ignore_region_free(region);
101 } else if (current_region->address < region->address) {
108 // Insert it mc_heap_ignore_region_t:
109 if (current_region->address < region->address)
110 xbt_dynar_insert_at(mc_heap_comparison_ignore, cursor + 1, ®ion);
112 xbt_dynar_insert_at(mc_heap_comparison_ignore, cursor, ®ion);
115 void MC_heap_region_ignore_send(mc_heap_ignore_region_t region)
117 s_mc_ignore_heap_message_t message;
118 message.type = MC_MESSAGE_IGNORE_HEAP;
119 message.region = *region;
120 if (MC_protocol_send(mc_client->fd, &message, sizeof(message)))
121 xbt_die("Could not send ignored region to MCer");
122 XBT_DEBUG("Sent ignored region to the model-checker");
125 // FIXME, cross-process support? (or make this it is used on the app-side)
126 void MC_ignore_heap(void *address, size_t size)
128 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
130 mc_heap_ignore_region_t region = xbt_new0(s_mc_heap_ignore_region_t, 1);
131 region->address = address;
136 (char *) std_heap->heapbase) / BLOCKSIZE + 1;
138 if (std_heap->heapinfo[region->block].type == 0) {
139 region->fragment = -1;
140 std_heap->heapinfo[region->block].busy_block.ignore++;
143 ((uintptr_t) (ADDR2UINT(address) % (BLOCKSIZE))) >> std_heap->
144 heapinfo[region->block].type;
145 std_heap->heapinfo[region->block].busy_frag.ignore[region->fragment]++;
148 MC_heap_region_ignore_insert(region);
151 if (mc_mode == MC_MODE_CLIENT)
152 MC_heap_region_ignore_send(region);
154 mmalloc_set_current_heap(heap);
157 void MC_remove_ignore_heap(void *address, size_t size)
159 if (mc_mode == MC_MODE_CLIENT) {
160 s_mc_ignore_memory_message_t message;
161 message.type = MC_MESSAGE_UNIGNORE_HEAP;
162 message.addr = address;
164 MC_client_send_message(&message, sizeof(message));
167 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
169 unsigned int cursor = 0;
171 int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
172 mc_heap_ignore_region_t region;
173 int ignore_found = 0;
175 while (start <= end) {
176 cursor = (start + end) / 2;
178 (mc_heap_ignore_region_t) xbt_dynar_get_as(mc_heap_comparison_ignore,
180 mc_heap_ignore_region_t);
181 if (region->address == address) {
184 } else if (region->address < address) {
187 if ((char *) region->address <= ((char *) address + size)) {
196 if (ignore_found == 1) {
197 xbt_dynar_remove_at(mc_heap_comparison_ignore, cursor, NULL);
198 MC_remove_ignore_heap(address, size);
200 mmalloc_set_current_heap(heap);
203 // FIXME, cross-process support?
204 void MC_ignore_global_variable(const char *name)
206 mc_process_t process = &mc_model_checker->process;
207 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
208 xbt_assert(process->object_infos, "MC subsystem not initialized");
210 size_t n = process->object_infos_size;
211 for (size_t i=0; i!=n; ++i) {
212 mc_object_info_t info = process->object_infos[i];
216 int end = xbt_dynar_length(info->global_variables) - 1;
217 while (start <= end) {
218 unsigned int cursor = (start + end) / 2;
219 dw_variable_t current_var =
220 (dw_variable_t) xbt_dynar_get_as(info->global_variables,
221 cursor, dw_variable_t);
222 if (strcmp(current_var->name, name) == 0) {
223 xbt_dynar_remove_at(info->global_variables, cursor, NULL);
225 end = xbt_dynar_length(info->global_variables) - 1;
226 } else if (strcmp(current_var->name, name) < 0) {
233 mmalloc_set_current_heap(heap);
236 /** \brief Ignore a local variable in a scope
238 * Ignore all instances of variables with a given name in
239 * any (possibly inlined) subprogram with a given namespaced
242 * \param var_name Name of the local variable (or parameter to ignore)
243 * \param subprogram_name Name of the subprogram fo ignore (NULL for any)
244 * \param subprogram (possibly inlined) Subprogram of the scope
245 * \param scope Current scope
247 // FIXME, cross-process support (messaging?)
248 static void mc_ignore_local_variable_in_scope(const char *var_name,
249 const char *subprogram_name,
250 dw_frame_t subprogram,
253 // Processing of direct variables:
255 // If the current subprogram matches the given name:
256 if (!subprogram_name ||
257 (subprogram->name && strcmp(subprogram_name, subprogram->name) == 0)) {
259 // Try to find the variable and remove it:
261 int end = xbt_dynar_length(scope->variables) - 1;
263 // Dichotomic search:
264 while (start <= end) {
265 int cursor = (start + end) / 2;
266 dw_variable_t current_var =
267 (dw_variable_t) xbt_dynar_get_as(scope->variables, cursor,
270 int compare = strcmp(current_var->name, var_name);
272 // Variable found, remove it:
273 xbt_dynar_remove_at(scope->variables, cursor, NULL);
277 end = xbt_dynar_length(scope->variables) - 1;
278 } else if (compare < 0) {
286 // And recursive processing in nested scopes:
288 dw_frame_t nested_scope = NULL;
289 xbt_dynar_foreach(scope->scopes, cursor, nested_scope) {
290 // The new scope may be an inlined subroutine, in this case we want to use its
291 // namespaced name in recursive calls:
292 dw_frame_t nested_subprogram =
294 DW_TAG_inlined_subroutine ? nested_scope : subprogram;
296 mc_ignore_local_variable_in_scope(var_name, subprogram_name,
297 nested_subprogram, nested_scope);
301 static void MC_ignore_local_variable_in_object(const char *var_name,
302 const char *subprogram_name,
303 mc_object_info_t info)
305 xbt_dict_cursor_t cursor2;
308 xbt_dict_foreach(info->subprograms, cursor2, key, frame) {
309 mc_ignore_local_variable_in_scope(var_name, subprogram_name, frame, frame);
313 void MC_ignore_local_variable(const char *var_name, const char *frame_name)
315 mc_process_t process = &mc_model_checker->process;
316 if (strcmp(frame_name, "*") == 0)
318 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
320 size_t n = process->object_infos_size;
322 for (i=0; i!=n; ++i) {
323 MC_ignore_local_variable_in_object(var_name, frame_name, process->object_infos[i]);
326 mmalloc_set_current_heap(heap);
329 void MC_stack_area_add(stack_region_t stack_area)
331 if (stacks_areas == NULL)
332 stacks_areas = xbt_dynar_new(sizeof(stack_region_t), NULL);
333 xbt_dynar_push(stacks_areas, &stack_area);
336 /** @brief Register a stack in the model checker
338 * The stacks are allocated in the heap. The MC handle them especially
339 * when we analyse/compare the content of the heap so it must be told where
340 * they are with this function.
343 * @param process Process owning the stack
345 * @param size Size of the stack
347 void MC_new_stack_area(void *stack, smx_process_t process, void *context, size_t size)
349 xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
351 stack_region_t region = xbt_new0(s_stack_region_t, 1);
352 region->address = stack;
353 region->context = context;
357 (char *) std_heap->heapbase) / BLOCKSIZE + 1;
359 if (smpi_privatize_global_variables && process) {
360 region->process_index = smpi_process_index_of_smx_process(process);
363 region->process_index = -1;
365 if (mc_mode == MC_MODE_CLIENT) {
366 s_mc_stack_region_message_t message;
367 message.type = MC_MESSAGE_STACK_REGION;
368 message.stack_region = *region;
369 MC_client_send_message(&message, sizeof(message));
372 MC_stack_area_add(region);
374 mmalloc_set_current_heap(heap);
377 void MC_process_ignore_memory(mc_process_t process, void *addr, size_t size)
379 xbt_dynar_t checkpoint_ignore = process->checkpoint_ignore;
380 mc_checkpoint_ignore_region_t region =
381 xbt_new0(s_mc_checkpoint_ignore_region_t, 1);
385 if (xbt_dynar_is_empty(checkpoint_ignore)) {
386 xbt_dynar_push(checkpoint_ignore, ®ion);
389 unsigned int cursor = 0;
391 int end = xbt_dynar_length(checkpoint_ignore) - 1;
392 mc_checkpoint_ignore_region_t current_region = NULL;
394 while (start <= end) {
395 cursor = (start + end) / 2;
397 (mc_checkpoint_ignore_region_t) xbt_dynar_get_as(checkpoint_ignore,
399 mc_checkpoint_ignore_region_t);
400 if (current_region->addr == addr) {
401 if (current_region->size == size) {
402 checkpoint_ignore_region_free(region);
404 } else if (current_region->size < size) {
409 } else if (current_region->addr < addr) {
416 if (current_region->addr == addr) {
417 if (current_region->size < size) {
418 xbt_dynar_insert_at(checkpoint_ignore, cursor + 1, ®ion);
420 xbt_dynar_insert_at(checkpoint_ignore, cursor, ®ion);
422 } else if (current_region->addr < addr) {
423 xbt_dynar_insert_at(checkpoint_ignore, cursor + 1, ®ion);
425 xbt_dynar_insert_at(checkpoint_ignore, cursor, ®ion);