1. Move the memory zeroization of mmap to munmap to increase mmap
performance
2. Do memory zeroizaiton during the drop of VMManager to guarentee all
allocated memory is zeroized before the next allocation
It turns out taking a lock in every system call is a significant
performance bottleneck. In light of this finding, we replace a mutex in
a critical path of system call with an atomic boolean.
This rewrite serves three purposes:
1. Fix some subtle bugs in the old implementation;
2. Implement mremap using mmap and munmap so that mremap can automatically
enjoy new features (e.g., mprotect and memory permissions) once mmap and
munmap support the feature.
3. Write down the invariants hold by VMManager explictly so that the correctness
of the new implementation can be reason more easily.
Update the occlum.json to align with the gen_enclave_conf design.
Below is the two updated structures:
"metadata": {
"product_id": 0,
"version_number": 0,
"debuggable": true
},
"resource_limits": {
"max_num_of_threads": 32,
"kernel_space_heap_size": "32MB",
"kernel_space_stack_size": "1MB",
"user_space_size": "256MB"
}
On lightweight Linux distribution, like alpine, getpwuid()
returns NULL, and errno is ENOENT, this patch fix crash
caused by this situation.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Add "untrusted" sections for environment variables defined in Occlum.json. Environment
variable defined in "default" will be shown in libos directly. Environment variable
defined in "untrusted" can be passed from occlum run or PAL layer and can override
the value in "default" and thus is considered "untrusted".
Fix std::alloc::Alloc not found
The lastest Rust changes the trait to std::alloc::AllocRef.
Update the docker files to support sgx 2.9.1
Remove the compilerRT dependency for rust sdk update
Before this commit, the three ECalls of the LibOS enclave do not give
the exact reason on error. In this commit, we modify the enclave entry code
to return the errno and list all possible values of errno in Enclave.edl.
