#include <libunwind.h>
#include <libunwind-ptrace.h>
+#include <xbt/mmalloc.h>
+
#include "mc_process.h"
#include "mc_object_info.h"
#include "mc_address_space.h"
#include "mc_unw.h"
+#include "mc_snapshot.h"
+#include "mc_ignore.h"
+#include "mc_smx.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_process, mc,
"MC process information");
static void MC_process_init_memory_map_info(mc_process_t process);
static void MC_process_open_memory_file(mc_process_t process);
+// ***** Destructor callbacks
+
+// ***** mc_address_space methods for mc_process
+
static mc_process_t MC_process_get_process(mc_process_t p) {
return p;
}
return p->address_space_class == &mc_process_class;
}
+// ***** mc_process
+
void MC_process_init(mc_process_t process, pid_t pid, int sockfd)
{
process->address_space.address_space_class = &mc_process_class;
&process->heap_address, std_heap_var->address, sizeof(struct mdesc*),
MC_PROCESS_INDEX_DISABLED);
+ process->smx_process_infos = MC_smx_process_info_list_new();
+ process->smx_old_process_infos = MC_smx_process_info_list_new();
+
+ process->checkpoint_ignore = MC_checkpoint_ignore_new();
+
process->unw_addr_space = unw_create_addr_space(&mc_unw_accessors , __BYTE_ORDER);
if (process->process_flags & MC_PROCESS_SELF_FLAG) {
process->unw_underlying_addr_space = unw_local_addr_space;
process->maestro_stack_start = NULL;
process->maestro_stack_end = NULL;
+ xbt_dynar_free(&process->checkpoint_ignore);
+
+ xbt_dynar_free(&process->smx_process_infos);
+ xbt_dynar_free(&process->smx_old_process_infos);
+
size_t i;
for (i=0; i!=process->object_infos_size; ++i) {
MC_free_object_info(&process->object_infos[i]);
assert(!MC_process_is_self(process));
// Read/dereference/refresh the std_heap pointer:
if (!process->heap) {
- xbt_mheap_t oldheap = mmalloc_get_current_heap();
- MC_SET_MC_HEAP;
+ xbt_mheap_t oldheap = mmalloc_set_current_heap(mc_heap);
process->heap = malloc(sizeof(struct mdesc));
mmalloc_set_current_heap(oldheap);
}
// Refresh process->heapinfo:
size_t malloc_info_bytesize = process->heap->heaplimit * sizeof(malloc_info);
- xbt_mheap_t oldheap = mmalloc_get_current_heap();
- MC_SET_MC_HEAP;
+ xbt_mheap_t heap = mmalloc_set_current_heap(mc_heap);
process->heap_info = (malloc_info*) realloc(process->heap_info,
malloc_info_bytesize);
- mmalloc_set_current_heap(oldheap);
+ mmalloc_set_current_heap(heap);
MC_process_read(process, MC_ADDRESS_SPACE_READ_FLAGS_NONE,
process->heap_info,
{
const size_t n = process->object_infos_size;
size_t i;
+
+ // First lookup the variable in the executable shared object.
+ // A global variable used directly by the executable code from a library
+ // is reinstanciated in the executable memory .data/.bss.
+ // We need to look up the variable in the execvutable first.
+ if (process->binary_info) {
+ mc_object_info_t info = process->binary_info;
+ dw_variable_t var = MC_file_object_info_find_variable_by_name(info, name);
+ if (var)
+ return var;
+ }
+
for (i=0; i!=n; ++i) {
mc_object_info_t info =process->object_infos[i];
dw_variable_t var = MC_file_object_info_find_variable_by_name(info, name);
if (var)
return var;
}
+
return NULL;
}
+void MC_process_read_variable(mc_process_t process, const char* name, void* target, size_t size)
+{
+ dw_variable_t var = MC_process_find_variable_by_name(process, name);
+ if (!var->address)
+ xbt_die("No simple location for this variable");
+ if (!var->type->full_type)
+ xbt_die("Partial type for %s, cannot check size", name);
+ if (var->type->full_type->byte_size != size)
+ xbt_die("Unexpected size for %s (expected %zi, was %zi)",
+ name, size, (size_t) var->type->full_type->byte_size);
+ MC_process_read(process, MC_PROCESS_NO_FLAG, target, var->address, size,
+ MC_PROCESS_INDEX_ANY);
+}
+
// ***** Memory access
int MC_process_vm_open(pid_t pid, int flags)
}
}
+const void* MC_process_read_simple(mc_process_t process,
+ void* local, const void* remote, size_t len)
+{
+ e_adress_space_read_flags_t flags = MC_PROCESS_NO_FLAG;
+ int index = MC_PROCESS_INDEX_ANY;
+ MC_process_read(process, flags, local, remote, len, index);
+ return local;
+}
+
+const void* MC_process_read_dynar_element(mc_process_t process,
+ void* local, const void* remote_dynar, size_t i)
+{
+ s_xbt_dynar_t d;
+ MC_process_read_simple(process, &d, remote_dynar, sizeof(d));
+ MC_process_read_simple(process, local, xbt_dynar_get_ptr(&d, i), i);
+ return local;
+}
+
void MC_process_write(mc_process_t process, const void* local, void* remote, size_t len)
{
if (MC_process_is_self(process)) {
}
}
+unsigned long MC_process_read_dynar_length(mc_process_t process, const void* remote_dynar)
+{
+ if (!remote_dynar)
+ return 0;
+ unsigned long res;
+ MC_process_read_simple(process, &res,
+ &((xbt_dynar_t)remote_dynar)->used, sizeof(res));
+ return res;
+}
+
static pthread_once_t zero_buffer_flag = PTHREAD_ONCE_INIT;
static const void* zero_buffer;
static const int zero_buffer_size = 10 * 4096;
}
}
}
+
+void MC_simcall_handle(smx_simcall_t req, int value)
+{
+ if (MC_process_is_self(&mc_model_checker->process)) {
+ SIMIX_simcall_handle(req, value);
+ return;
+ }
+
+ MC_process_smx_refresh(&mc_model_checker->process);
+
+ unsigned i;
+ mc_smx_process_info_t pi = NULL;
+
+ xbt_dynar_foreach_ptr(mc_model_checker->process.smx_process_infos, i, pi) {
+ smx_process_t p = (smx_process_t) pi->address;
+ if (req == &pi->copy.simcall) {
+ smx_simcall_t real_req = &p->simcall;
+ // TODO, use a remote call
+ SIMIX_simcall_handle(real_req, value);
+ return;
+ }
+ }
+
+ // Check (remove afterwards):
+ xbt_dynar_foreach_ptr(mc_model_checker->process.smx_process_infos, i, pi) {
+ smx_process_t p = (smx_process_t) pi->address;
+ if (req == &p->simcall)
+ xbt_die("The real simcall was passed. We expected the local copy.");
+ }
+
+ xbt_die("Could not find the request");
+}
