Merge branch 'master' of git+ssh://scm.gforge.inria.fr//gitroot/simgrid/simgrid

[simgrid.git] / src / mc / Process.hpp

diff --git a/src/mc/Process.hpp b/src/mc/Process.hpp
index 36ef994..7f4127e 100644 (file)
--- a/src/mc/Process.hpp
+++ b/src/mc/Process.hpp
@@ -13,13 +13,13 @@
 #include <type_traits>
 #include <vector>
 #include <memory>
+#include <string>
 
 #include <sys/types.h>
 
 #include <simgrid_config.h>
 
 #include <xbt/base.h>
-#include <xbt/dynar.h>
 #include <xbt/mmalloc.h>
 
 #include "src/xbt/mmalloc/mmprivate.h"
@@ -33,17 +33,11 @@
 
 #include "src/mc/mc_forward.hpp"
 #include "src/mc/mc_base.h"
+#include "src/mc/RemotePtr.hpp"
 #include "src/mc/AddressSpace.hpp"
 #include "src/mc/mc_protocol.h"
 #include "src/mc/ObjectInformation.hpp"
 
-// Those flags are used to track down which cached information
-// is still up to date and which information needs to be updated.
-typedef int mc_process_cache_flags_t;
-#define MC_PROCESS_CACHE_FLAG_NONE 0
-#define MC_PROCESS_CACHE_FLAG_HEAP 1
-#define MC_PROCESS_CACHE_FLAG_MALLOC_INFO 2
-#define MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES 4
 
 namespace simgrid {
 namespace mc {
@@ -51,7 +45,7 @@ namespace mc {
 class SimixProcessInformation {
 public:
   /** MCed address of the process */
-  void* address = nullptr;
+  RemotePtr<s_smx_process_t> address = nullptr;
   union {
     /** (Flat) Copy of the process data structure */
     struct s_smx_process copy;
@@ -82,8 +76,8 @@ struct IgnoredHeapRegion {
 
 /** Representation of a process
  *
- *  This class is mixing a lot of differents responsabilities and is tied
- *  to SIMIX. It should probably split into different classes.
+ *  This class is mixing a lot of different responsabilities and is tied
+ *  to SIMIX. It should probably be split into different classes.
  *
  *  Responsabilities:
  *
@@ -96,6 +90,13 @@ struct IgnoredHeapRegion {
  *  - etc.
  */
 class Process final : public AddressSpace {
+private:
+  // Those flags are used to track down which cached information
+  // is still up to date and which information needs to be updated.
+  static constexpr int cache_none = 0;
+  static constexpr int cache_heap = 1;
+  static constexpr int cache_malloc = 2;
+  static constexpr int cache_simix_processes = 4;
 public:
   Process(pid_t pid, int sockfd);
   ~Process();
@@ -119,7 +120,7 @@ public:
     read_variable(name, &res, sizeof(T));
     return res;
   }
-  char* read_string(RemotePtr<void> address) const;
+  std::string read_string(RemotePtr<void> address) const;
 
   // Write memory:
   void write_bytes(const void* buffer, size_t len, RemotePtr<void> address);
@@ -135,16 +136,21 @@ public:
   // Heap access:
   xbt_mheap_t get_heap()
   {
-    if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
+    if (!(this->cache_flags_ & Process::cache_heap))
       this->refresh_heap();
     return this->heap.get();
   }
   malloc_info* get_malloc_info()
   {
-    if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
+    if (!(this->cache_flags_ & Process::cache_malloc))
       this->refresh_malloc_info();
     return this->heap_info.data();
   }
+  
+  void clear_cache()
+  {
+    this->cache_flags_ = Process::cache_none;
+  }
 
   Channel const& getChannel() const { return channel_; }
   Channel& getChannel() { return channel_; }
@@ -212,6 +218,36 @@ public:
   std::vector<simgrid::mc::SimixProcessInformation>& simix_processes();
   std::vector<simgrid::mc::SimixProcessInformation>& old_simix_processes();
 
+  /** Get a local description of a remote SIMIX process */
+  simgrid::mc::SimixProcessInformation* resolveProcessInfo(
+    simgrid::mc::RemotePtr<s_smx_process_t> process)
+  {
+    xbt_assert(mc_mode == MC_MODE_SERVER);
+    if (!process)
+      return nullptr;
+    this->refresh_simix();
+    for (auto& process_info : this->smx_process_infos)
+      if (process_info.address == process)
+        return &process_info;
+    for (auto& process_info : this->smx_old_process_infos)
+      if (process_info.address == process)
+        return &process_info;
+    return nullptr;
+  }
+
+  /** Get a local copy of the SIMIX process structure */
+  smx_process_t resolveProcess(simgrid::mc::RemotePtr<s_smx_process_t> process)
+  {
+    simgrid::mc::SimixProcessInformation* process_info =
+      this->resolveProcessInfo(process);
+    if (process_info)
+      return &process_info->copy;
+    else
+      return nullptr;
+  }
+
+  void dumpStack();
+
 private:
   void init_memory_map_info();
   void refresh_heap();
@@ -251,9 +287,11 @@ public: // Copies of MCed SMX data structures
    */
   std::vector<SimixProcessInformation> smx_old_process_infos;
 
+private:
   /** State of the cache (which variables are up to date) */
-  mc_process_cache_flags_t cache_flags = MC_PROCESS_CACHE_FLAG_NONE;
+  int cache_flags_ = Process::cache_none;
 
+public:
   /** Address of the heap structure in the MCed process. */
   void* heap_address;
 
@@ -277,7 +315,7 @@ public: // Libunwind-data
 
   /** Full-featured MC-aware libunwind address space for the process
    *
-   *  This address space is using a mc_unw_context_t
+   *  This address space is using a simgrid::mc::UnwindContext*
    *  (with simgrid::mc::Process* / simgrid::mc::AddressSpace*
    *  and unw_context_t).
    */