-/* Copyright (c) 2015-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2015-2018. 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. */
int smpi_loaded_page = -1;
char* smpi_data_exe_start = nullptr;
int smpi_data_exe_size = 0;
-int smpi_privatize_global_variables;
+SmpiPrivStrategies smpi_privatize_global_variables;
static void* smpi_data_exe_copy;
// We keep a copy of all the privatization regions: We can then delete everything easily by iterating over this
// Use a std::deque so that pointers remain valid after push_back().
static std::deque<s_smpi_privatization_region_t> smpi_privatization_regions;
-static const int PROT_RWX = (PROT_READ | PROT_WRITE | PROT_EXEC);
-static const int PROT_RW = (PROT_READ | PROT_WRITE );
-XBT_ATTRIB_UNUSED static const int PROT_RX = (PROT_READ | PROT_EXEC );
+static constexpr int PROT_RWX = PROT_READ | PROT_WRITE | PROT_EXEC;
+static constexpr int PROT_RW = PROT_READ | PROT_WRITE;
-void smpi_get_executable_global_size()
+static void smpi_get_executable_global_size()
{
char buffer[PATH_MAX];
char* full_name = realpath(xbt_binary_name, buffer);
#endif
/** Map a given SMPI privatization segment (make a SMPI process active) */
-void smpi_switch_data_segment(int dest) {
- if (smpi_loaded_page == dest)//no need to switch, we've already loaded the one we want
+void smpi_switch_data_segment(simgrid::s4u::ActorPtr actor)
+{
+ if (smpi_loaded_page == actor->get_pid()) // no need to switch, we've already loaded the one we want
return;
// So the job:
- smpi_really_switch_data_segment(dest);
+ smpi_really_switch_data_segment(actor);
}
/** Map a given SMPI privatization segment (make a SMPI process active) even if SMPI thinks it is already active
* When doing a state restoration, the state of the restored variables might not be consistent with the state of the
* virtual memory. In this case, we to change the data segment.
*/
-void smpi_really_switch_data_segment(int dest)
+void smpi_really_switch_data_segment(simgrid::s4u::ActorPtr actor)
{
if (smpi_data_exe_size == 0) // no need to switch
return;
#if HAVE_PRIVATIZATION
// FIXME, cross-process support (mmap across process when necessary)
- simgrid::smpi::Process* process = smpi_process_remote(simgrid::s4u::Actor::byPid(dest));
+ XBT_DEBUG("Switching data frame to the one of process %ld", actor->get_pid());
+ simgrid::smpi::Process* process = smpi_process_remote(actor);
int current = process->privatized_region()->file_descriptor;
- XBT_DEBUG("Switching data frame to the one of process %d", dest);
- void* tmp =
- mmap(TOPAGE(smpi_data_exe_start), smpi_data_exe_size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, current, 0);
+ void* tmp = mmap(TOPAGE(smpi_data_exe_start), smpi_data_exe_size, PROT_RW, MAP_FIXED | MAP_SHARED, current, 0);
if (tmp != TOPAGE(smpi_data_exe_start))
xbt_die("Couldn't map the new region (errno %d): %s", errno, strerror(errno));
- smpi_loaded_page = dest;
+ smpi_loaded_page = actor->get_pid();
#endif
}
*/
void smpi_backup_global_memory_segment()
{
-#if HAVE_PRIVATIZATION
+ xbt_assert(HAVE_PRIVATIZATION, "You are trying to use privatization on a system that does not support it. Don't.");
smpi_get_executable_global_size();
XBT_DEBUG("bss+data segment found : size %d starting at %p", smpi_data_exe_size, smpi_data_exe_start);
if (smpi_data_exe_size == 0) { // no need to do anything as global variables don't exist
- smpi_privatize_global_variables=false;
+ smpi_privatize_global_variables = SmpiPrivStrategies::None;
return;
}
// Make a copy of the data segment. This clean copy is retained over the whole runtime
// of the simulation and can be used to initialize a dynamically added, new process.
asan_safe_memcpy(smpi_data_exe_copy, TOPAGE(smpi_data_exe_start), smpi_data_exe_size);
-#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
}
// Initializes the memory mapping for a single process and returns the privatization region
xbt_die("Impossible to set the size of the temporary file for memory mapping");
/* Ask for a free region */
- address = mmap(nullptr, smpi_data_exe_size, PROT_READ | PROT_WRITE, MAP_SHARED, file_descriptor, 0);
+ address = mmap(nullptr, smpi_data_exe_size, PROT_RW, MAP_SHARED, file_descriptor, 0);
if (address == MAP_FAILED)
xbt_die("Couldn't find a free region for memory mapping");
#endif
}
+static int sendbuffer_size = 0;
+static char* sendbuffer = nullptr;
+static int recvbuffer_size = 0;
+static char* recvbuffer = nullptr;
+
+//allocate a single buffer for all sends, growing it if needed
+void* smpi_get_tmp_sendbuffer(int size)
+{
+ if (not smpi_process()->replaying())
+ return xbt_malloc(size);
+ if (sendbuffer_size<size){
+ sendbuffer=static_cast<char*>(xbt_realloc(sendbuffer,size));
+ sendbuffer_size=size;
+ }
+ return sendbuffer;
+}
+
+//allocate a single buffer for all recv
+void* smpi_get_tmp_recvbuffer(int size){
+ if (not smpi_process()->replaying())
+ return xbt_malloc(size);
+ if (recvbuffer_size<size){
+ recvbuffer=static_cast<char*>(xbt_realloc(recvbuffer,size));
+ recvbuffer_size=size;
+ }
+ return recvbuffer;
+}
+
+void smpi_free_tmp_buffer(void* buf){
+ if (not smpi_process()->replaying())
+ xbt_free(buf);
+}
+
+void smpi_free_replay_tmp_buffers(){
+ xbt_free(sendbuffer);
+ xbt_free(recvbuffer);
+}
