Yichun Zhang

Detaching rr record from the target process?

1

Sorry if it is something obvious, but is it possible to detach the "rr record" process from the target process? So that the target process can continue running (like a...

[BUG] When `bpftime load` is interrupted or killed, the target process's injected code should be removed

2

Currently, when I hit Ctrl-C to quit `bpftime load`, it only destructs the global shm without cleaning up the target process's injected code and data: ``` ^C14:59:56 pid=622114 malloc calls:...

[BUG] When a bpf userland program traces itself via the syscall tracepoint, bpftime always crashes

2

Consider a bpf userland program traces itself like this: ```C ... #include #include int main(int argc, char *argv[]) { ... obj = bpf_object__open_file("hello.bpf", NULL); ... prog = bpf_object__find_program_by_name(obj, "hello"); ......

[BUG] Unit test suite failed 2 test cases on Fedora Linux x86_6

1

When running the unit test suite of bpftime on Fedora Linux x86_64, I'm seeing 2 test cases failing consistently: ``` =============================================================================== test cases: 16 | 14 passed | 2 failed...

[BUG] SPDLOG won't output anything in the agent code

1

I've noted that I cannot see any log messages from SPDLOG in the target process's agent code. For example, I have to patch the `ringbuf::reserve` function like below actually to...

[FEATURE] Build options to disable libbpf and Linux kernel interoperability

2

Currently, the bpftime build always includes libbpf and Linux kernel interoperability, which we don't need in our use cases. It would be nice to have a build option to exclude...

[BUG] All log from the runtime should go to trace_pipe

2

I've noticed that right after I run the `bpftime attach PID` command, the target process's output stream will immediately have the extra output lines like these: ``` [2024-01-27 14:54:25.459] [info]...

[BUG] Need more details on frida uprobe attach failures

5

I'm getting the following error with uprobe + llvm jit: ``` [2024-01-28 01:12:03][info][707874] Created uprobe/uretprobe perf event handler, module name /500g-a/git/ebpf-plus/libbpf/uprobes/a.out, offset 1126 [2024-01-28 01:12:03.112] [info] [agent.cpp:66] Entering bpftime agent...

[FEATURE] Need a way to clean up a specific eBPF program in the global shm

1

The global shm is leaking because there is no way to release a particular eBPF program individually. We can only free up everything like this: ``` $ bpftimetool remove [2024-01-26...

[BUG] Cannot control log level in `bpftime attach` at least

2

I tried to use the system environment variable to control the log level of bpftime but it won't work, at least for the `bpftime attach` command: ``` $ SPDLOG_LEVEL=Error bpftime...