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shm: check region size when opening existing

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This commit is contained in:
Alexey Rybalchenko
2022-02-08 01:27:45 +01:00
parent 1a75141fc4
commit b747a8787c
2 changed files with 36 additions and 2 deletions
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13
fairmq/shmem/UnmanagedRegion.h
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@@ -99,16 +99,25 @@ struct UnmanagedRegion
fRegion = mapped_region(fFileMapping, read_write, 0, size, 0, cfg.creationFlags);
} else {
try {
fShmemObject = shared_memory_object(open_or_create, fName.c_str(), read_write);
if (size != 0) {
// if opening fails, create
try {
fShmemObject = shared_memory_object(open_only, fName.c_str(), read_write);
} catch (interprocess_exception& e) {
LOG(debug) << "Could not open " << (remote ? "remote" : "local") << " shared_memory_object for region id '" << cfg.id.value() << "': " << e.what() << ", creating...";
fShmemObject = shared_memory_object(create_only, fName.c_str(), read_write);
fShmemObject.truncate(size);
}
} catch (interprocess_exception& e) {
LOG(error) << "Failed " << (remote ? "opening" : "creating") << " shared_memory_object for region id '" << cfg.id.value() << "': " << e.what();
throw;
}
try {
fRegion = mapped_region(fShmemObject, read_write, 0, 0, 0, cfg.creationFlags);
if (size != 0 && size != fRegion.get_size()) {
LOG(error) << "Created/opened region size (" << fRegion.get_size() << ") does not match configured size (" << size << ")";
throw TransportError(tools::ToString("Created/opened region size (", fRegion.get_size(), ") does not match configured size (", size, ")"));
}
} catch (interprocess_exception& e) {
LOG(error) << "Failed mapping shared_memory_object for region id '" << cfg.id.value() << "': " << e.what();
throw;