X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e1a5484101efbff9c8d982a0c4650f7953ee7e2f..492c467dc0dadb58aba6e9bb10df6e0c78b2765f:/src/smpi/internals/smpi_shared.cpp

diff --git a/src/smpi/internals/smpi_shared.cpp b/src/smpi/internals/smpi_shared.cpp
index dfc99b8446..10ab0ad0ae 100644
--- a/src/smpi/internals/smpi_shared.cpp
+++ b/src/smpi/internals/smpi_shared.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2023. 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. */
@@ -43,14 +43,11 @@
 
 #include <cerrno>
 
-#include <sys/types.h>
-#ifndef WIN32
-#include <sys/mman.h>
-#endif
+#include "smpi_utils.hpp"
 #include <stdlib.h>
+#include <sys/mman.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include "smpi_utils.hpp"
 #ifndef MAP_ANONYMOUS
 #define MAP_ANONYMOUS MAP_ANON
 #endif
@@ -61,7 +58,7 @@
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_shared, smpi, "Logging specific to SMPI (shared memory macros)");
 
-namespace{
+namespace {
 /** Some location in the source code
  *
  *  This information is used by SMPI_SHARED_MALLOC to allocate  some shared memory for all simulated processes.
@@ -94,12 +91,10 @@ struct shared_metadata_t {
 std::map<const void*, shared_metadata_t> allocs_metadata;
 std::map<std::string, void*, std::less<>> calls;
 
-#ifndef WIN32
 int smpi_shared_malloc_bogusfile           = -1;
 int smpi_shared_malloc_bogusfile_huge_page = -1;
 unsigned long smpi_shared_malloc_blocksize = 1UL << 20;
-#endif
-}
+} // namespace
 
 void smpi_shared_destroy()
 {
@@ -108,7 +103,6 @@ void smpi_shared_destroy()
   calls.clear();
 }
 
-#ifndef WIN32
 static void* shm_map(int fd, size_t size, shared_data_key_type* data)
 {
   void* mem = smpi_temp_shm_mmap(fd, size);
@@ -126,9 +120,8 @@ static void *smpi_shared_malloc_local(size_t size, const char *file, int line)
 {
   void* mem;
   smpi_source_location loc(file, line);
-  auto res = allocs.insert(std::make_pair(loc, shared_data_t()));
-  auto data = res.first;
-  if (res.second) {
+  auto [data, inserted] = allocs.try_emplace(loc);
+  if (inserted) {
     // The new element was inserted.
     int fd             = smpi_temp_shm_get();
     data->second.fd    = fd;
@@ -305,7 +298,7 @@ void* smpi_shared_malloc_partial(size_t size, const size_t* shared_block_offsets
 void* smpi_shared_malloc_intercept(size_t size, const char* file, int line)
 {
   if( smpi_cfg_auto_shared_malloc_thresh() == 0 || size < smpi_cfg_auto_shared_malloc_thresh()){
-    void* ptr = ::operator new(size);
+    void* ptr = xbt_malloc(size);
     if(not smpi_cfg_trace_call_use_absolute_path())
       simgrid::smpi::utils::account_malloc_size(size, simgrid::xbt::Path(file).get_base_name(), line, ptr);
     else
@@ -319,18 +312,42 @@ void* smpi_shared_malloc_intercept(size_t size, const char* file, int line)
 
 void* smpi_shared_calloc_intercept(size_t num_elm, size_t elem_size, const char* file, int line)
 {
-  if( smpi_cfg_auto_shared_malloc_thresh() == 0 || elem_size*num_elm < smpi_cfg_auto_shared_malloc_thresh()){
-    void* ptr = ::operator new(elem_size*num_elm);
+  size_t size = elem_size * num_elm;
+  if (smpi_cfg_auto_shared_malloc_thresh() == 0 || size < smpi_cfg_auto_shared_malloc_thresh()) {
+    void* ptr = xbt_malloc0(size);
     if(not smpi_cfg_trace_call_use_absolute_path())
-      simgrid::smpi::utils::account_malloc_size(elem_size*num_elm, simgrid::xbt::Path(file).get_base_name(), line, ptr);
+      simgrid::smpi::utils::account_malloc_size(size, simgrid::xbt::Path(file).get_base_name(), line, ptr);
     else
-      simgrid::smpi::utils::account_malloc_size(elem_size*num_elm, file, line, ptr);
-    memset(ptr, 0, elem_size*num_elm);
+      simgrid::smpi::utils::account_malloc_size(size, file, line, ptr);
     return ptr;
   } else {
-    simgrid::smpi::utils::account_shared_size(elem_size*num_elm);
-    return smpi_shared_malloc(elem_size*num_elm, file, line);
+    simgrid::smpi::utils::account_shared_size(size);
+    return memset(smpi_shared_malloc(size, file, line), 0, size);
+  }
+}
+
+void* smpi_shared_realloc_intercept(void* data, size_t size, const char* file, int line)
+{
+  if (size == 0) {
+    smpi_shared_free(data);
+    return nullptr;
   }
+  if (data == nullptr)
+    return smpi_shared_malloc_intercept(size, file, line);
+
+  auto meta = allocs_metadata.find(data);
+  if (meta == allocs_metadata.end()) {
+    XBT_DEBUG("Classical realloc(%p, %zu)", data, size);
+    return xbt_realloc(data, size);
+  }
+
+  XBT_DEBUG("Shared realloc(%p, %zu) (old size: %zu)", data, size, meta->second.size);
+  void* ptr = smpi_shared_malloc_intercept(size, file, line);
+  if (ptr != data) {
+    memcpy(ptr, data, std::min(size, meta->second.size));
+    smpi_shared_free(data);
+  }
+  return ptr;
 }
 
 void* smpi_shared_malloc(size_t size, const char* file, int line)
@@ -343,7 +360,7 @@ void* smpi_shared_malloc(size_t size, const char* file, int line)
     return smpi_shared_malloc_partial(size, shared_block_offsets.data(), nb_shared_blocks);
   }
   XBT_DEBUG("Classic allocation of %zu bytes", size);
-  return ::operator new(size);
+  return xbt_malloc(size);
 }
 
 int smpi_is_shared(const void* ptr, std::vector<std::pair<size_t, size_t>> &private_blocks, size_t *offset){
@@ -376,9 +393,9 @@ std::vector<std::pair<size_t, size_t>> shift_and_frame_private_blocks(const std:
                                                                       size_t offset, size_t buff_size)
 {
   std::vector<std::pair<size_t, size_t>> result;
-  for (auto const& block : vec) {
-    auto new_block = std::make_pair(std::min(std::max((size_t)0, block.first - offset), buff_size),
-                                    std::min(std::max((size_t)0, block.second - offset), buff_size));
+  for (auto const& [block_begin, block_end] : vec) {
+    auto new_block = std::make_pair(std::clamp(block_begin - offset, (size_t)0, buff_size),
+                                    std::clamp(block_end - offset, (size_t)0, buff_size));
     if (new_block.second > 0 && new_block.first < buff_size)
       result.push_back(new_block);
   }
@@ -418,7 +435,7 @@ void smpi_shared_free(void *ptr)
   if (smpi_cfg_shared_malloc() == SharedMallocType::LOCAL) {
     auto meta = allocs_metadata.find(ptr);
     if (meta == allocs_metadata.end()) {
-      ::operator delete(ptr);
+      xbt_free(ptr);
       return;
     }
     shared_data_t* data = &meta->second.data->second;
@@ -429,7 +446,7 @@ void smpi_shared_free(void *ptr)
     if (data->count <= 0) {
       close(data->fd);
       allocs.erase(allocs.find(meta->second.data->first));
-      allocs_metadata.erase(ptr);
+      allocs_metadata.erase(meta);
       XBT_DEBUG("Shared free - Local - with removal - of %p", ptr);
     } else {
       XBT_DEBUG("Shared free - Local - no removal - of %p, count = %d", ptr, data->count);
@@ -443,19 +460,18 @@ void smpi_shared_free(void *ptr)
       munmap(ptr, meta->second.size);
       if(meta->second.data->second.count==0){
         delete meta->second.data;
-        allocs_metadata.erase(ptr);
+        allocs_metadata.erase(meta);
       }
     }else{
-      ::operator delete(ptr);
+      xbt_free(ptr);
       return;
     }
 
   } else {
     XBT_DEBUG("Classic deallocation of %p", ptr);
-    ::operator delete(ptr);
+    xbt_free(ptr);
   }
 }
-#endif
 
 int smpi_shared_known_call(const char* func, const char* input)
 {