-/* Copyright (c) 2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2015-2017. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include <cstdint>
#include <climits>
+#include <cstring>
#include <vector>
#include <sys/mman.h>
#include <unistd.h>
-#include "../xbt/memory_map.hpp"
+#include "src/xbt/memory_map.hpp"
-#include "private.h"
-#include "private.hpp"
+#include "src/smpi/private.h"
+#include "src/smpi/private.hpp"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_memory, smpi, "Memory layout support for SMPI");
int smpi_loaded_page = -1;
char* smpi_start_data_exe = nullptr;
int smpi_size_data_exe = 0;
-bool smpi_privatize_global_variables;
+int smpi_privatize_global_variables;
static const int PROT_RWX = (PROT_READ | PROT_WRITE | PROT_EXEC);
static const int PROT_RW = (PROT_READ | PROT_WRITE );
#if HAVE_PRIVATIZATION
if(smpi_loaded_page==-1){//initial switch, do the copy from the real page here
for (int i=0; i< smpi_process_count(); i++){
- memcpy(smpi_privatisation_regions[i].address, TOPAGE(smpi_start_data_exe), smpi_size_data_exe);
+ memcpy(smpi_privatization_regions[i].address, TOPAGE(smpi_start_data_exe), smpi_size_data_exe);
}
}
// FIXME, cross-process support (mmap across process when necessary)
- int current = smpi_privatisation_regions[dest].file_descriptor;
+ int current = smpi_privatization_regions[dest].file_descriptor;
XBT_DEBUG("Switching data frame to the one of process %d", dest);
void* tmp =
mmap(TOPAGE(smpi_start_data_exe), smpi_size_data_exe, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, current, 0);
if (tmp != TOPAGE(smpi_start_data_exe))
- xbt_die("Couldn't map the new region");
+ xbt_die("Couldn't map the new region (errno %d): %s", errno, strerror(errno));
smpi_loaded_page = dest;
#endif
}
-int smpi_is_privatisation_file(char* file)
+int smpi_is_privatization_file(char* file)
{
return strncmp("/dev/shm/my-buffer-", file, std::strlen("/dev/shm/my-buffer-")) == 0;
}
void smpi_initialize_global_memory_segments()
{
-#if !HAVE_PRIVATIZATION
- smpi_privatize_global_variables=false;
- xbt_die("You are trying to use privatization on a system that does not support it. Don't.");
- return;
-#else
-
+#if HAVE_PRIVATIZATION
smpi_get_executable_global_size();
XBT_DEBUG ("bss+data segment found : size %d starting at %p", smpi_size_data_exe, smpi_start_data_exe );
return;
}
- smpi_privatisation_regions = static_cast<smpi_privatisation_region_t>(
- xbt_malloc(smpi_process_count() * sizeof(struct s_smpi_privatisation_region)));
+ smpi_privatization_regions = static_cast<smpi_privatization_region_t>(
+ xbt_malloc(smpi_process_count() * sizeof(struct s_smpi_privatization_region)));
for (int i=0; i< smpi_process_count(); i++){
// create SIMIX_process_count() mappings of this size with the same data inside
memcpy(address, TOPAGE(smpi_start_data_exe), smpi_size_data_exe);
// store the address of the mapping for further switches
- smpi_privatisation_regions[i].file_descriptor = file_descriptor;
- smpi_privatisation_regions[i].address = address;
+ smpi_privatization_regions[i].file_descriptor = file_descriptor;
+ smpi_privatization_regions[i].address = address;
}
+#else /* ! HAVE_PRIVATIZATION */
+ smpi_privatize_global_variables = false;
+ xbt_die("You are trying to use privatization on a system that does not support it. Don't.");
+ return;
#endif
}
return;
#if HAVE_PRIVATIZATION
for (int i=0; i< smpi_process_count(); i++) {
- if (munmap(smpi_privatisation_regions[i].address, smpi_size_data_exe) < 0)
- XBT_WARN("Unmapping of fd %d failed: %s", smpi_privatisation_regions[i].file_descriptor, strerror(errno));
- close(smpi_privatisation_regions[i].file_descriptor);
+ if (munmap(smpi_privatization_regions[i].address, smpi_size_data_exe) < 0)
+ XBT_WARN("Unmapping of fd %d failed: %s", smpi_privatization_regions[i].file_descriptor, strerror(errno));
+ close(smpi_privatization_regions[i].file_descriptor);
}
- xbt_free(smpi_privatisation_regions);
+ xbt_free(smpi_privatization_regions);
#endif
}