-/* Copyright (c) 2014-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2014-2022. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include <cerrno>
#include <cstring>
#include <memory>
+#include <mutex>
#include <string>
using simgrid::mc::remote;
// ***** Helper stuff
-// List of library which memory segments are not considered:
-static const std::vector<std::string> filtered_libraries = {
-#ifdef __linux__
- "ld",
-#elif defined __FreeBSD__
- "ld-elf",
- "ld-elf32",
- "libkvm", /* kernel data access library */
- "libprocstat", /* process and file information retrieval */
- "libthr", /* thread library */
- "libutil",
-#endif
- "libargp", /* workarounds for glibc-less systems */
- "libasan", /* gcc sanitizers */
- "libasn1",
- "libboost_chrono",
- "libboost_context",
- "libboost_context-mt",
- "libboost_stacktrace_addr2line",
- "libboost_stacktrace_backtrace",
- "libboost_system",
- "libboost_thread",
- "libboost_timer",
- "libbrotlicommon",
- "libbrotlidec",
- "libbz2",
- "libc",
- "libc++",
- "libcdt",
- "libcgraph",
- "libcom_err",
- "libcrypt",
- "libcrypto",
- "libcurl",
- "libcurl-gnutls",
- "libcxxrt",
- "libdebuginfod",
- "libdl",
- "libdw",
- "libelf",
- "libevent",
- "libexecinfo",
- "libffi",
- "libflang",
- "libflangrti",
- "libgcc_s",
- "libgmp",
- "libgnutls",
- "libgcrypt",
- "libgfortran",
- "libgpg-error",
- "libgssapi",
- "libgssapi_krb5",
- "libhcrypto",
- "libheimbase",
- "libheimntlm",
- "libhx509",
- "libhogweed",
- "libidn2",
- "libimf",
- "libintlc",
- "libirng",
- "libk5crypto",
- "libkeyutils",
- "libkrb5",
- "libkrb5support", /*odd behaviour on fedora rawhide ... remove these when fixed*/
- "liblber",
- "libldap",
- "libldap_r",
- "liblua5.1",
- "liblua5.3",
- "liblzma",
- "libm",
- "libmd",
- "libnettle",
- "libnghttp2",
- "libomp",
- "libp11-kit",
- "libpapi",
- "libpcre2",
- "libpfm",
- "libpgmath",
- "libpsl",
- "libpthread",
- "libquadmath",
- "libresolv",
- "libroken",
- "librt",
- "librtmp",
- "libsasl2",
- "libselinux",
- "libsqlite3",
- "libssh",
- "libssh2",
- "libssl",
- "libstdc++",
- "libsvml",
- "libtasn1",
- "libtsan", /* gcc sanitizers */
- "libubsan", /* gcc sanitizers */
- "libunistring",
- "libunwind",
- "libunwind-ptrace",
- "libunwind-x86",
- "libunwind-x86_64",
- "libwind",
- "libz",
- "libzstd"};
-
static bool is_filtered_lib(const std::string& libname)
{
- return std::find(begin(filtered_libraries), end(filtered_libraries), libname) != end(filtered_libraries);
+ return libname != "libsimgrid";
}
static std::string get_lib_name(const std::string& pathname)
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* mmalloc_default_mdp, void* maxpid, void* actors, void* dead_actors)
+void RemoteProcess::init(xbt_mheap_t mmalloc_default_mdp, unsigned long* maxpid, xbt_dynar_t actors)
{
- this->heap_address = mmalloc_default_mdp;
- this->maxpid_addr_ = maxpid;
- this->actors_addr_ = actors;
- this->dead_actors_addr_ = dead_actors;
+ this->heap_address = remote(mmalloc_default_mdp);
+ this->maxpid_addr_ = remote(maxpid);
+ this->actors_addr_ = remote(actors);
this->memory_map_ = simgrid::xbt::get_memory_map(this->pid_);
this->init_memory_map_info();
this->memory_file = fd;
this->smx_actors_infos.clear();
- this->smx_dead_actors_infos.clear();
this->unw_addr_space = simgrid::mc::UnwindContext::createUnwindAddressSpace();
this->unw_underlying_addr_space = simgrid::unw::create_addr_space();
this->unw_underlying_context = simgrid::unw::create_context(this->unw_underlying_addr_space, this->pid_);
// 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();
continue;
xbt_assert(c > 0, "Could not read string from remote process");
- const void* p = memchr(res.data() + off, '\0', c);
- if (p)
+ if (const void* p = memchr(res.data() + off, '\0', c))
return std::string(res.data());
off += c;
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);
return smx_actors_infos;
}
-std::vector<simgrid::mc::ActorInformation>& RemoteProcess::dead_actors()
-{
- this->refresh_simix();
- return smx_dead_actors_infos;
-}
-
void RemoteProcess::dump_stack() const
{
unw_addr_space_t as = unw_create_addr_space(&_UPT_accessors, BYTE_ORDER);
if (unw_init_remote(&cursor, as, context) != 0) {
_UPT_destroy(context);
unw_destroy_addr_space(as);
- XBT_ERROR("Could not initialiez ptrace cursor");
+ XBT_ERROR("Could not initialize ptrace cursor");
return;
}
_UPT_destroy(context);
unw_destroy_addr_space(as);
}
-
-unsigned long RemoteProcess::get_maxpid() const
-{
- unsigned long maxpid;
- this->read_bytes(&maxpid, sizeof(unsigned long), remote(maxpid_addr_));
- return maxpid;
-}
-
-void RemoteProcess::get_actor_vectors(RemotePtr<s_xbt_dynar_t>& actors, RemotePtr<s_xbt_dynar_t>& dead_actors)
-{
- actors = remote(static_cast<s_xbt_dynar_t*>(actors_addr_));
- dead_actors = remote(static_cast<s_xbt_dynar_t*>(dead_actors_addr_));
-}
} // namespace mc
} // namespace simgrid
