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 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
131 mc_heap_ignore_region_t region = xbt_new0(s_mc_heap_ignore_region_t, 1);
132 region->address = address;
137 (char *) std_heap->heapbase) / BLOCKSIZE + 1;
139 if (std_heap->heapinfo[region->block].type == 0) {
140 region->fragment = -1;
141 std_heap->heapinfo[region->block].busy_block.ignore++;
144 ((uintptr_t) (ADDR2UINT(address) % (BLOCKSIZE))) >> std_heap->
145 heapinfo[region->block].type;
146 std_heap->heapinfo[region->block].busy_frag.ignore[region->fragment]++;
149 MC_heap_region_ignore_insert(region);
152 if (mc_mode == MC_MODE_CLIENT)
153 MC_heap_region_ignore_send(region);
160 void MC_remove_ignore_heap(void *address, size_t size)
162 if (mc_mode == MC_MODE_CLIENT) {
163 s_mc_ignore_memory_message_t message;
164 message.type = MC_MESSAGE_UNIGNORE_HEAP;
165 message.addr = address;
167 MC_client_send_message(&message, sizeof(message));
170 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
174 unsigned int cursor = 0;
176 int end = xbt_dynar_length(mc_heap_comparison_ignore) - 1;
177 mc_heap_ignore_region_t region;
178 int ignore_found = 0;
180 while (start <= end) {
181 cursor = (start + end) / 2;
183 (mc_heap_ignore_region_t) xbt_dynar_get_as(mc_heap_comparison_ignore,
185 mc_heap_ignore_region_t);
186 if (region->address == address) {
189 } else if (region->address < address) {
192 if ((char *) region->address <= ((char *) address + size)) {
201 if (ignore_found == 1) {
202 xbt_dynar_remove_at(mc_heap_comparison_ignore, cursor, NULL);
203 MC_remove_ignore_heap(address, size);
211 // FIXME, cross-process support?
212 void MC_ignore_global_variable(const char *name)
214 mc_process_t process = &mc_model_checker->process;
215 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
219 xbt_assert(process->object_infos, "MC subsystem not initialized");
221 size_t n = process->object_infos_size;
222 for (size_t i=0; i!=n; ++i) {
223 mc_object_info_t info = process->object_infos[i];
227 int end = xbt_dynar_length(info->global_variables) - 1;
228 while (start <= end) {
229 unsigned int cursor = (start + end) / 2;
230 dw_variable_t current_var =
231 (dw_variable_t) xbt_dynar_get_as(info->global_variables,
232 cursor, dw_variable_t);
233 if (strcmp(current_var->name, name) == 0) {
234 xbt_dynar_remove_at(info->global_variables, cursor, NULL);
236 end = xbt_dynar_length(info->global_variables) - 1;
237 } else if (strcmp(current_var->name, name) < 0) {
249 /** \brief Ignore a local variable in a scope
251 * Ignore all instances of variables with a given name in
252 * any (possibly inlined) subprogram with a given namespaced
255 * \param var_name Name of the local variable (or parameter to ignore)
256 * \param subprogram_name Name of the subprogram fo ignore (NULL for any)
257 * \param subprogram (possibly inlined) Subprogram of the scope
258 * \param scope Current scope
260 // FIXME, cross-process support (messaging?)
261 static void mc_ignore_local_variable_in_scope(const char *var_name,
262 const char *subprogram_name,
263 dw_frame_t subprogram,
266 // Processing of direct variables:
268 // If the current subprogram matches the given name:
269 if (!subprogram_name ||
270 (subprogram->name && strcmp(subprogram_name, subprogram->name) == 0)) {
272 // Try to find the variable and remove it:
274 int end = xbt_dynar_length(scope->variables) - 1;
276 // Dichotomic search:
277 while (start <= end) {
278 int cursor = (start + end) / 2;
279 dw_variable_t current_var =
280 (dw_variable_t) xbt_dynar_get_as(scope->variables, cursor,
283 int compare = strcmp(current_var->name, var_name);
285 // Variable found, remove it:
286 xbt_dynar_remove_at(scope->variables, cursor, NULL);
290 end = xbt_dynar_length(scope->variables) - 1;
291 } else if (compare < 0) {
299 // And recursive processing in nested scopes:
301 dw_frame_t nested_scope = NULL;
302 xbt_dynar_foreach(scope->scopes, cursor, nested_scope) {
303 // The new scope may be an inlined subroutine, in this case we want to use its
304 // namespaced name in recursive calls:
305 dw_frame_t nested_subprogram =
307 DW_TAG_inlined_subroutine ? nested_scope : subprogram;
309 mc_ignore_local_variable_in_scope(var_name, subprogram_name,
310 nested_subprogram, nested_scope);
314 static void MC_ignore_local_variable_in_object(const char *var_name,
315 const char *subprogram_name,
316 mc_object_info_t info)
318 xbt_dict_cursor_t cursor2;
321 xbt_dict_foreach(info->subprograms, cursor2, key, frame) {
322 mc_ignore_local_variable_in_scope(var_name, subprogram_name, frame, frame);
326 void MC_ignore_local_variable(const char *var_name, const char *frame_name)
328 mc_process_t process = &mc_model_checker->process;
331 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
333 if (strcmp(frame_name, "*") == 0)
338 size_t n = process->object_infos_size;
340 for (i=0; i!=n; ++i) {
341 MC_ignore_local_variable_in_object(var_name, frame_name, process->object_infos[i]);
349 void MC_stack_area_add(stack_region_t stack_area)
351 if (stacks_areas == NULL)
352 stacks_areas = xbt_dynar_new(sizeof(stack_region_t), NULL);
353 xbt_dynar_push(stacks_areas, &stack_area);
356 /** @brief Register a stack in the model checker
358 * The stacks are allocated in the heap. The MC handle them especially
359 * when we analyse/compare the content of the heap so it must be told where
360 * they are with this function.
363 * @param process Process owning the stack
365 * @param size Size of the stack
367 void MC_new_stack_area(void *stack, smx_process_t process, void *context, size_t size)
370 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
373 stack_region_t region = xbt_new0(s_stack_region_t, 1);
374 region->address = stack;
375 region->context = context;
379 (char *) std_heap->heapbase) / BLOCKSIZE + 1;
381 if (smpi_privatize_global_variables && process) {
382 region->process_index = smpi_process_index_of_smx_process(process);
385 region->process_index = -1;
387 if (mc_mode == MC_MODE_CLIENT) {
388 s_mc_stack_region_message_t message;
389 message.type = MC_MESSAGE_STACK_REGION;
390 message.stack_region = *region;
391 MC_client_send_message(&message, sizeof(message));
394 MC_stack_area_add(region);
400 void MC_process_ignore_memory(mc_process_t process, void *addr, size_t size)
402 xbt_dynar_t checkpoint_ignore = process->checkpoint_ignore;
403 mc_checkpoint_ignore_region_t region =
404 xbt_new0(s_mc_checkpoint_ignore_region_t, 1);
408 if (xbt_dynar_is_empty(checkpoint_ignore)) {
409 xbt_dynar_push(checkpoint_ignore, ®ion);
412 unsigned int cursor = 0;
414 int end = xbt_dynar_length(checkpoint_ignore) - 1;
415 mc_checkpoint_ignore_region_t current_region = NULL;
417 while (start <= end) {
418 cursor = (start + end) / 2;
420 (mc_checkpoint_ignore_region_t) xbt_dynar_get_as(checkpoint_ignore,
422 mc_checkpoint_ignore_region_t);
423 if (current_region->addr == addr) {
424 if (current_region->size == size) {
425 checkpoint_ignore_region_free(region);
427 } else if (current_region->size < size) {
432 } else if (current_region->addr < addr) {
439 if (current_region->addr == addr) {
440 if (current_region->size < size) {
441 xbt_dynar_insert_at(checkpoint_ignore, cursor + 1, ®ion);
443 xbt_dynar_insert_at(checkpoint_ignore, cursor, ®ion);
445 } else if (current_region->addr < addr) {
446 xbt_dynar_insert_at(checkpoint_ignore, cursor + 1, ®ion);
448 xbt_dynar_insert_at(checkpoint_ignore, cursor, ®ion);