X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4249cbf34db972e00df34d98ec89cca899ac0a73..1f7ae620b5e74e6d7b364807ef04b6c869f7d744:/src/mc/sosp/RemoteProcessMemory.cpp

diff --git a/src/mc/sosp/RemoteProcessMemory.cpp b/src/mc/sosp/RemoteProcessMemory.cpp
index 2ebe51beb6..0bfb964fea 100644
--- a/src/mc/sosp/RemoteProcessMemory.cpp
+++ b/src/mc/sosp/RemoteProcessMemory.cpp
@@ -7,9 +7,12 @@
 
 #include "src/mc/sosp/RemoteProcessMemory.hpp"
 
+#include "src/mc/explo/Exploration.hpp"
+#include "src/mc/explo/LivenessChecker.hpp"
 #include "src/mc/sosp/Snapshot.hpp"
 #include "xbt/file.hpp"
 #include "xbt/log.h"
+#include "xbt/system_error.hpp"
 
 #include <fcntl.h>
 #include <libunwind-ptrace.h>
@@ -22,6 +25,8 @@
 #include <mutex>
 #include <string>
 #include <string_view>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_process, mc, "MC process information");
 
@@ -450,4 +455,133 @@ void RemoteProcessMemory::dump_stack() const
   _UPT_destroy(context);
   unw_destroy_addr_space(as);
 }
+
+bool RemoteProcessMemory::handle_message(const char* buffer, ssize_t size)
+{
+  s_mc_message_t base_message;
+  xbt_assert(size >= (ssize_t)sizeof(base_message), "Broken message");
+  memcpy(&base_message, buffer, sizeof(base_message));
+
+  switch (base_message.type) {
+    case MessageType::INITIAL_ADDRESSES: {
+      s_mc_message_initial_addresses_t message;
+      xbt_assert(size == sizeof(message), "Broken message. Got %d bytes instead of %d.", (int)size,
+                 (int)sizeof(message));
+      memcpy(&message, buffer, sizeof(message));
+
+      this->init(message.mmalloc_default_mdp);
+      break;
+    }
+
+    case MessageType::IGNORE_HEAP: {
+      s_mc_message_ignore_heap_t message;
+      xbt_assert(size == sizeof(message), "Broken message");
+      memcpy(&message, buffer, sizeof(message));
+
+      IgnoredHeapRegion region;
+      region.block    = message.block;
+      region.fragment = message.fragment;
+      region.address  = message.address;
+      region.size     = message.size;
+      this->ignore_heap(region);
+      break;
+    }
+
+    case MessageType::UNIGNORE_HEAP: {
+      s_mc_message_ignore_memory_t message;
+      xbt_assert(size == sizeof(message), "Broken message");
+      memcpy(&message, buffer, sizeof(message));
+      this->unignore_heap((void*)(std::uintptr_t)message.addr, message.size);
+      break;
+    }
+
+    case MessageType::IGNORE_MEMORY: {
+      s_mc_message_ignore_memory_t message;
+      xbt_assert(size == sizeof(message), "Broken message");
+      memcpy(&message, buffer, sizeof(message));
+      this->ignore_region(message.addr, message.size);
+      break;
+    }
+
+    case MessageType::STACK_REGION: {
+      s_mc_message_stack_region_t message;
+      xbt_assert(size == sizeof(message), "Broken message");
+      memcpy(&message, buffer, sizeof(message));
+      this->stack_areas().push_back(message.stack_region);
+    } break;
+
+    case MessageType::REGISTER_SYMBOL: {
+      s_mc_message_register_symbol_t message;
+      xbt_assert(size == sizeof(message), "Broken message");
+      memcpy(&message, buffer, sizeof(message));
+      xbt_assert(not message.callback, "Support for client-side function proposition is not implemented.");
+      XBT_DEBUG("Received symbol: %s", message.name.data());
+
+      LivenessChecker::automaton_register_symbol(*this, message.name.data(), remote((int*)message.data));
+      break;
+    }
+
+    case MessageType::WAITING:
+      return false;
+
+    case MessageType::ASSERTION_FAILED:
+      Exploration::get_instance()->report_assertion_failure();
+      break;
+
+    default:
+      xbt_die("Unexpected message from model-checked application");
+  }
+  return true;
+}
+
+void RemoteProcessMemory::handle_waitpid()
+{
+  XBT_DEBUG("Check for wait event");
+  int status;
+  pid_t pid;
+  while ((pid = waitpid(-1, &status, WNOHANG)) != 0) {
+    if (pid == -1) {
+      if (errno == ECHILD) { // No more children:
+        xbt_assert(not running(), "Inconsistent state");
+        break;
+      } else {
+        XBT_ERROR("Could not wait for pid");
+        throw simgrid::xbt::errno_error();
+      }
+    }
+
+    if (pid == this->pid()) {
+      // From PTRACE_O_TRACEEXIT:
+#ifdef __linux__
+      if (status >> 8 == (SIGTRAP | (PTRACE_EVENT_EXIT << 8))) {
+        unsigned long eventmsg;
+        xbt_assert(ptrace(PTRACE_GETEVENTMSG, pid, 0, &eventmsg) != -1, "Could not get exit status");
+        status = static_cast<int>(eventmsg);
+        if (WIFSIGNALED(status))
+          Exploration::get_instance()->report_crash(status);
+      }
+#endif
+
+      // We don't care about non-lethal signals, just reinject them:
+      if (WIFSTOPPED(status)) {
+        XBT_DEBUG("Stopped with signal %i", (int)WSTOPSIG(status));
+        errno = 0;
+#ifdef __linux__
+        ptrace(PTRACE_CONT, pid, 0, WSTOPSIG(status));
+#elif defined BSD
+        ptrace(PT_CONTINUE, pid, (caddr_t)1, WSTOPSIG(status));
+#endif
+        xbt_assert(errno == 0, "Could not PTRACE_CONT");
+      }
+
+      else if (WIFSIGNALED(status)) {
+        Exploration::get_instance()->report_crash(status);
+      } else if (WIFEXITED(status)) {
+        XBT_DEBUG("Child process is over");
+        terminate();
+      }
+    }
+  }
+}
+
 } // namespace simgrid::mc