#include <cerrno>
#include <cstring>
#include <memory>
+#include <mutex>
#include <string>
using simgrid::mc::remote;
static const std::vector<std::string> filtered_libraries = {
#ifdef __linux__
"ld",
+ "ld-linux-x86",
#elif defined __FreeBSD__
"ld-elf",
"ld-elf32",
return real_count;
}
-static pthread_once_t zero_buffer_flag = PTHREAD_ONCE_INIT;
-static const void* zero_buffer;
-static const size_t zero_buffer_size = 10 * 4096;
-
-static void zero_buffer_init()
-{
- int fd = open("/dev/zero", O_RDONLY);
- if (fd < 0)
- xbt_die("Could not open /dev/zero");
- zero_buffer = mmap(nullptr, zero_buffer_size, PROT_READ, MAP_SHARED, fd, 0);
- if (zero_buffer == MAP_FAILED)
- xbt_die("Could not map the zero buffer");
- close(fd);
-}
-
int open_vm(pid_t pid, int flags)
{
std::string buffer = "/proc/" + std::to_string(pid) + "/mem";
RemoteProcess::RemoteProcess(pid_t pid) : AddressSpace(this), pid_(pid), running_(true) {}
-void RemoteProcess::init()
+void RemoteProcess::init(xbt_mheap_t mmalloc_default_mdp, unsigned long* maxpid, xbt_dynar_t actors,
+ xbt_dynar_t dead_actors)
{
+ this->heap_address = remote(mmalloc_default_mdp);
+ this->maxpid_addr_ = remote(maxpid);
+ this->actors_addr_ = remote(actors);
+ this->dead_actors_addr_ = remote(dead_actors);
+
this->memory_map_ = simgrid::xbt::get_memory_map(this->pid_);
this->init_memory_map_info();
xbt_assert(fd >= 0, "Could not open file for process virtual address space");
this->memory_file = fd;
- // Read std_heap (is a struct mdesc*):
- const simgrid::mc::Variable* std_heap_var = this->find_variable("__mmalloc_default_mdp");
- xbt_assert(std_heap_var, "No heap information in the target process");
- xbt_assert(std_heap_var->address, "No constant address for this variable");
- this->read_bytes(&this->heap_address, sizeof(mdesc*), remote(std_heap_var->address));
-
this->smx_actors_infos.clear();
this->smx_dead_actors_infos.clear();
this->unw_addr_space = simgrid::mc::UnwindContext::createUnwindAddressSpace();
// Read/dereference/refresh the std_heap pointer:
if (not this->heap)
this->heap = std::make_unique<s_xbt_mheap_t>();
- this->read_bytes(this->heap.get(), sizeof(mdesc), remote(this->heap_address));
+ this->read(this->heap.get(), this->heap_address);
this->cache_flags_ |= RemoteProcess::cache_heap;
}
XBT_DEBUG("Get debug information ...");
this->maestro_stack_start_ = nullptr;
this->maestro_stack_end_ = nullptr;
- this->object_infos.resize(0);
+ this->object_infos.clear();
this->binary_info = nullptr;
std::vector<simgrid::xbt::VmMap> const& maps = this->memory_map_;
const char* current_name = nullptr;
- this->object_infos.clear();
-
for (size_t i = 0; i < maps.size(); i++) {
simgrid::xbt::VmMap const& reg = maps[i];
const char* pathname = maps[i].pathname.c_str();
void* RemoteProcess::read_bytes(void* buffer, std::size_t size, RemotePtr<void> address, ReadOptions /*options*/) const
{
- if (pread_whole(this->memory_file, buffer, size, (size_t)address.address()) < 0)
- xbt_die("Read at %p from process %lli failed", (void*)address.address(), (long long)this->pid_);
+ xbt_assert(pread_whole(this->memory_file, buffer, size, (size_t)address.address()) != -1,
+ "Read at %p from process %lli failed", (void*)address.address(), (long long)this->pid_);
return buffer;
}
*/
void RemoteProcess::write_bytes(const void* buffer, size_t len, RemotePtr<void> address) const
{
- if (pwrite_whole(this->memory_file, buffer, len, (size_t)address.address()) < 0)
- xbt_die("Write to process %lli failed", (long long)this->pid_);
+ xbt_assert(pwrite_whole(this->memory_file, buffer, len, (size_t)address.address()) != -1,
+ "Write to process %lli failed", (long long)this->pid_);
+}
+
+static void zero_buffer_init(const void** zero_buffer, size_t zero_buffer_size)
+{
+ int fd = open("/dev/zero", O_RDONLY);
+ xbt_assert(fd >= 0, "Could not open /dev/zero");
+ *zero_buffer = mmap(nullptr, zero_buffer_size, PROT_READ, MAP_SHARED, fd, 0);
+ xbt_assert(*zero_buffer != MAP_FAILED, "Could not map the zero buffer");
+ close(fd);
}
void RemoteProcess::clear_bytes(RemotePtr<void> address, size_t len) const
{
- pthread_once(&zero_buffer_flag, zero_buffer_init);
+ static constexpr size_t zero_buffer_size = 10 * 4096;
+ static const void* zero_buffer;
+ static std::once_flag zero_buffer_flag;
+
+ std::call_once(zero_buffer_flag, zero_buffer_init, &zero_buffer, zero_buffer_size);
while (len) {
size_t s = len > zero_buffer_size ? zero_buffer_size : len;
this->write_bytes(zero_buffer, s, address);
_UPT_destroy(context);
unw_destroy_addr_space(as);
}
-
-unsigned long RemoteProcess::get_maxpid() const
-{
- static const char* name = nullptr;
- if (not name) {
- name = "simgrid::kernel::actor::maxpid";
- if (find_variable(name) == nullptr)
- name = "maxpid"; // We seem to miss the namespaces when compiling with GCC
- }
- unsigned long maxpid;
- read_variable(name, &maxpid, sizeof(maxpid));
- return maxpid;
-}
-
-void RemoteProcess::get_actor_vectors(RemotePtr<s_xbt_dynar_t>& actors, RemotePtr<s_xbt_dynar_t>& dead_actors)
-{
- static_assert(std::is_same<std::unique_ptr<simgrid::simix::Global>, decltype(simix_global)>::value,
- "Unexpected type for simix_global");
- static_assert(sizeof(simix_global) == sizeof(simgrid::simix::Global*), "Bad size for simix_global");
-
- // TODO, avoid to reload `&simix_global`, `simix_global`, `*simix_global`
- RemotePtr<simgrid::simix::Global> simix_global_p{this->read_variable<simgrid::simix::Global*>("simix_global")};
- Remote<simgrid::simix::Global> simix_global = this->read<simgrid::simix::Global>(simix_global_p);
-
- actors = remote(simix_global.get_buffer()->actors_vector);
- dead_actors = remote(simix_global.get_buffer()->dead_actors_vector);
-}
} // namespace mc
} // namespace simgrid
