riscv/qemu - qemu - Gitea: Git with a cup of tea

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Author	SHA1	Message	Date
Paolo Bonzini	3d508e096b	tracetool: add Rust DTrace/SystemTap SDT support Implement DTrace/SystemTap SDT by emitting the following: - The probe crate's probe!() macro is used to emit a DTrace/SystemTap SDT probe. - Every trace event gets a corresponding trace_<name>_enabled() -> bool generated function that Rust code can use to avoid expensive computation when a trace event is disabled. This API works for other trace backends too. `#[allow(dead_code)]` additions are necessary for QEMU's dstate in generated trace-<dir>.rs files since they are unused by the dtrace backend. `./configure --enable-trace-backends=` can enable multiple backends, so keep it simple and just silence the warning instead of trying to detect the condition when generating the dstate code can be skipped. The tracetool tests are updated. Take a look at tests/tracetool/dtrace.rs to see what the new generated code looks like. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Link: https://lore.kernel.org/r/20251119205200.173170-5-stefanha@redhat.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	4 months ago

Author

SHA1

Message

Date

Paolo Bonzini

3d508e096b

tracetool: add Rust DTrace/SystemTap SDT support

Implement DTrace/SystemTap SDT by emitting the following:
- The probe crate's probe!() macro is used to emit a DTrace/SystemTap
  SDT probe.
- Every trace event gets a corresponding trace_<name>_enabled() -> bool
  generated function that Rust code can use to avoid expensive
  computation when a trace event is disabled. This API works for other
  trace backends too.

`#[allow(dead_code)]` additions are necessary for QEMU's dstate in
generated trace-<dir>.rs files since they are unused by the dtrace
backend. `./configure --enable-trace-backends=` can enable multiple
backends, so keep it simple and just silence the warning instead of
trying to detect the condition when generating the dstate code can be
skipped.

The tracetool tests are updated. Take a look at
tests/tracetool/dtrace.rs to see what the new generated code looks like.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/20251119205200.173170-5-stefanha@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

4 months ago

1 Commits (de61484ec39f418e5c0d4603017695f9ffb8fe24)