* under the terms of the license (GNU LGPL) which comes with this package. */
#include "src/mc/remote/CheckerSide.hpp"
+#include "src/mc/explo/Exploration.hpp"
+#include "src/mc/explo/LivenessChecker.hpp"
#include "src/mc/sosp/RemoteProcessMemory.hpp"
#include "xbt/system_error.hpp"
+
#include <csignal>
+#include <sys/ptrace.h>
#include <sys/wait.h>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkerside, mc, "MC communication with the application");
throw simgrid::xbt::errno_error();
}
- if (not checker->get_remote_memory().handle_message(buffer.data(), size))
+ if (not checker->handle_message(buffer.data(), size))
checker->break_loop();
} else {
xbt_die("Unexpected event");
auto checker = static_cast<simgrid::mc::CheckerSide*>(arg);
if (events == EV_SIGNAL) {
if (sig == SIGCHLD)
- checker->get_remote_memory().handle_waitpid();
+ checker->handle_waitpid();
else
xbt_die("Unexpected signal: %d", sig);
} else {
event_base_loopbreak(base_.get());
}
+bool CheckerSide::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));
+
+ get_remote_memory().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;
+ get_remote_memory().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));
+ get_remote_memory().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));
+ get_remote_memory().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));
+ get_remote_memory().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(get_remote_memory(), 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 CheckerSide::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 get_remote_memory().running(), "Inconsistent state");
+ break;
+ } else {
+ XBT_ERROR("Could not wait for pid");
+ throw simgrid::xbt::errno_error();
+ }
+ }
+
+ if (pid == get_remote_memory().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");
+ get_remote_memory().terminate();
+ }
+ }
+ }
+}
+
} // namespace simgrid::mc
#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");
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
