#include <link.h>
#include <dirent.h>
+#ifndef WIN32
+#include <sys/mman.h>
+#endif
+
#include "src/internal_config.h"
#include "src/mc/mc_private.h"
#include "xbt/module.h"
#if HAVE_SMPI
RegionSnapshot privatized_region(
RegionType region_type, void *start_addr, void* permanent_addr,
- std::size_t size, const RegionSnapshot* ref_region
+ std::size_t size
)
{
size_t process_count = MC_smpi_process_count();
std::vector<simgrid::mc::RegionSnapshot> data;
data.reserve(process_count);
- for (size_t i = 0; i < process_count; i++) {
- const simgrid::mc::RegionSnapshot* ref_privatized_region = nullptr;
- if (ref_region && ref_region->storage_type() == StorageType::Privatized)
- ref_privatized_region = &ref_region->privatized_data()[i];
+ for (size_t i = 0; i < process_count; i++)
data.push_back(simgrid::mc::region(region_type, start_addr,
- privatisation_regions[i].address, size, ref_privatized_region));
- }
+ privatisation_regions[i].address, size));
simgrid::mc::RegionSnapshot region = simgrid::mc::RegionSnapshot(
region_type, start_addr, permanent_addr, size);
region.privatized_data(std::move(data));
- return std::move(region);
+ return region;
}
#endif
static
-void add_region(int index, mc_snapshot_t snapshot,
+void add_region(int index, simgrid::mc::Snapshot* snapshot,
simgrid::mc::RegionType type,
simgrid::mc::ObjectInformation* object_info,
void *start_addr, void* permanent_addr,
else if (type == simgrid::mc::RegionType::Heap)
xbt_assert(!object_info, "Unexpected object info for heap region.");
- simgrid::mc::RegionSnapshot const* ref_region = nullptr;
- if (mc_model_checker->parent_snapshot_)
- ref_region = mc_model_checker->parent_snapshot_->snapshot_regions[index].get();
-
simgrid::mc::RegionSnapshot region;
#if HAVE_SMPI
const bool privatization_aware = object_info
&& mc_model_checker->process().privatized(*object_info);
if (privatization_aware && MC_smpi_process_count())
region = simgrid::mc::privatized_region(
- type, start_addr, permanent_addr, size, ref_region);
+ type, start_addr, permanent_addr, size);
else
#endif
- region = simgrid::mc::region(type, start_addr, permanent_addr, size, ref_region);
+ region = simgrid::mc::region(type, start_addr, permanent_addr, size);
region.object_info(object_info);
snapshot->snapshot_regions[index]
return;
}
-static void get_memory_regions(simgrid::mc::Process* process, mc_snapshot_t snapshot)
+static void get_memory_regions(simgrid::mc::Process* process, simgrid::mc::Snapshot* snapshot)
{
const size_t n = process->object_infos.size();
snapshot->snapshot_regions.resize(n + 1);
snapshot->privatization_index = simgrid::mc::ProcessIndexMissing;
}
+#define PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC)
+#define PROT_RW (PROT_READ | PROT_WRITE)
+#define PROT_RX (PROT_READ | PROT_EXEC)
+
/** \brief Fills the position of the segments (executable, read-only, read/write).
- *
- * `dl_iterate_phdr` would be more robust but would not work in cross-process.
* */
+// TODO, use the ELF segment information for more robustness
void find_object_address(
std::vector<simgrid::xbt::VmMap> const& maps,
simgrid::mc::ObjectInformation* result)
continue;
}
free(map_basename);
- if ((reg.prot & PROT_WRITE)) {
+
+ // This is the non-GNU_RELRO-part of the data segment:
+ if (reg.prot == PROT_RW) {
xbt_assert(!result->start_rw,
"Multiple read-write segments for %s, not supported",
maps[i].pathname.c_str());
result->start_rw = (char*) reg.start_addr;
result->end_rw = (char*) reg.end_addr;
- // .bss is usually after the .data:
- simgrid::xbt::VmMap const& next = maps[i + 1];
- if (next.pathname.empty() && (next.prot & PROT_WRITE)
- && next.start_addr == reg.end_addr)
+
+ // The next VMA might be end of the data segment:
+ if (i + 1 < maps.size()
+ && maps[i + 1].pathname.empty()
+ && maps[i + 1].prot == PROT_RW
+ && maps[i + 1].start_addr == reg.end_addr)
result->end_rw = (char*) maps[i + 1].end_addr;
- } else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)) {
+ }
+
+ // This is the text segment:
+ else if (reg.prot == PROT_RX) {
xbt_assert(!result->start_exec,
"Multiple executable segments for %s, not supported",
maps[i].pathname.c_str());
result->start_exec = (char*) reg.start_addr;
result->end_exec = (char*) reg.end_addr;
- } else if ((reg.prot & PROT_READ) && !(reg.prot & PROT_EXEC)) {
+
+ // The next VMA might be end of the data segment:
+ if (i + 1 < maps.size()
+ && maps[i + 1].pathname.empty()
+ && maps[i + 1].prot == PROT_RW
+ && maps[i + 1].start_addr == reg.end_addr) {
+ result->start_rw = (char*) maps[i + 1].start_addr;
+ result->end_rw = (char*) maps[i + 1].end_addr;
+ }
+ }
+
+ // This is the GNU_RELRO-part of the data segment:
+ else if (reg.prot == PROT_READ) {
xbt_assert(!result->start_ro,
"Multiple read only segments for %s, not supported",
maps[i].pathname.c_str());
}
result->start = result->start_rw;
- if ((const void*) result->start_ro > result->start)
+ if ((const void*) result->start_ro < result->start)
result->start = result->start_ro;
- if ((const void*) result->start_exec > result->start)
+ if ((const void*) result->start_exec < result->start)
result->start = result->start_exec;
result->end = result->end_rw;
- if (result->end_ro && (const void*) result->end_ro < result->end)
+ if (result->end_ro && (const void*) result->end_ro > result->end)
result->end = result->end_ro;
if (result->end_exec && (const void*) result->end_exec > result->end)
result->end = result->end_exec;
- xbt_assert(result->start_rw);
- xbt_assert(result->start_exec);
+ xbt_assert(result->start_exec || result->start_rw || result->start_ro);
free(name);
}
std::vector<s_local_variable> variables;
for (s_mc_stack_frame_t& stack_frame : stack_frames)
fill_local_variables_values(&stack_frame, stack_frame.frame, process_index, variables);
- return std::move(variables);
+ return variables;
}
static std::vector<s_mc_stack_frame_t> unwind_stack_frames(simgrid::mc::UnwindContext* stack_context)
xbt_abort();
}
- return std::move(result);
+ return result;
};
-static std::vector<s_mc_snapshot_stack_t> take_snapshot_stacks(mc_snapshot_t * snapshot)
+static std::vector<s_mc_snapshot_stack_t> take_snapshot_stacks(simgrid::mc::Snapshot* snapshot)
{
std::vector<s_mc_snapshot_stack_t> res;
size_t stack_size =
(char*) stack.address + stack.size - (char*) sp;
- (*snapshot)->stack_sizes.push_back(stack_size);
+ snapshot->stack_sizes.push_back(stack_size);
}
- return std::move(res);
+ return res;
}
-static void snapshot_handle_ignore(mc_snapshot_t snapshot)
+static void snapshot_handle_ignore(simgrid::mc::Snapshot* snapshot)
{
xbt_assert(snapshot->process());
}
-static void snapshot_ignore_restore(mc_snapshot_t snapshot)
+static void snapshot_ignore_restore(simgrid::mc::Snapshot* snapshot)
{
for (auto const& ignored_data : snapshot->ignored_data)
snapshot->process()->write_bytes(
}
closedir (fd_dir);
- return std::move(fds);
+ return fds;
}
-mc_snapshot_t take_snapshot(int num_state)
+std::shared_ptr<simgrid::mc::Snapshot> take_snapshot(int num_state)
{
XBT_DEBUG("Taking snapshot %i", num_state);
simgrid::mc::Process* mc_process = &mc_model_checker->process();
- mc_snapshot_t snapshot = new simgrid::mc::Snapshot(mc_process);
+ std::shared_ptr<simgrid::mc::Snapshot> snapshot =
+ std::make_shared<simgrid::mc::Snapshot>(mc_process);
snapshot->num_state = num_state;
for (auto& p : mc_model_checker->process().simix_processes())
snapshot->enabled_processes.insert(p.copy.pid);
- snapshot_handle_ignore(snapshot);
+ snapshot_handle_ignore(snapshot.get());
if (_sg_mc_snapshot_fds)
snapshot->current_fds = get_current_fds(mc_model_checker->process().pid());
- const bool use_soft_dirty = _sg_mc_sparse_checkpoint && _sg_mc_soft_dirty;
-
/* Save the std heap and the writable mapped pages of libsimgrid and binary */
- get_memory_regions(mc_process, snapshot);
- if (use_soft_dirty)
- mc_process->reset_soft_dirty();
+ get_memory_regions(mc_process, snapshot.get());
snapshot->to_ignore = mc_model_checker->process().ignored_heap();
if (_sg_mc_visited > 0 || strcmp(_sg_mc_property_file, "")) {
- snapshot->stacks =
- take_snapshot_stacks(&snapshot);
+ snapshot->stacks = take_snapshot_stacks(snapshot.get());
if (_sg_mc_hash)
snapshot->hash = simgrid::mc::hash(*snapshot);
else
} else
snapshot->hash = 0;
- snapshot_ignore_restore(snapshot);
- if (use_soft_dirty)
- mc_model_checker->parent_snapshot_ = snapshot;
+ snapshot_ignore_restore(snapshot.get());
return snapshot;
}
static inline
-void restore_snapshot_regions(mc_snapshot_t snapshot)
+void restore_snapshot_regions(simgrid::mc::Snapshot* snapshot)
{
for(std::unique_ptr<s_mc_mem_region_t> const& region : snapshot->snapshot_regions) {
// For privatized, variables we decided it was not necessary to take the snapshot:
}
static inline
-void restore_snapshot_fds(mc_snapshot_t snapshot)
+void restore_snapshot_fds(simgrid::mc::Snapshot* snapshot)
{
if (mc_mode == MC_MODE_SERVER)
xbt_die("FD snapshot not implemented in client/server mode.");
}
}
-void restore_snapshot(mc_snapshot_t snapshot)
+void restore_snapshot(std::shared_ptr<simgrid::mc::Snapshot> snapshot)
{
XBT_DEBUG("Restore snapshot %i", snapshot->num_state);
- const bool use_soft_dirty = _sg_mc_sparse_checkpoint && _sg_mc_soft_dirty;
- restore_snapshot_regions(snapshot);
+ restore_snapshot_regions(snapshot.get());
if (_sg_mc_snapshot_fds)
- restore_snapshot_fds(snapshot);
- if (use_soft_dirty)
- mc_model_checker->process().reset_soft_dirty();
- snapshot_ignore_restore(snapshot);
+ restore_snapshot_fds(snapshot.get());
+ snapshot_ignore_restore(snapshot.get());
mc_model_checker->process().clear_cache();
- if (use_soft_dirty)
- mc_model_checker->parent_snapshot_ = snapshot;
}
}
