This series adds SDT probe support so that SystemTap, GDB, etc can trace QEMU's Rust code when compiled with `./configure --enable-trace-backends=dtrace`.
The dtrace(1) tool that generates the .o and C header file does not support Rust. Use the probe crate (https://crates.io/crates/probe), which takes care of emitting SDT probes, and extend tracetool to emit code for the trace events. While SDT is cross-platform, the probe crate currently only supports Linux (SystemTap). On other platforms the crate is a nop - it compiles but does nothing. Future changes to the probe crate may add support for other operating systems like FreeBSD, macOS, etc without much needed in the way of QEMU code changes. Josh: I CCed you just to let you know that QEMU will use the probes crate. There is no need to review the code unless you want to. Based-on: <[email protected]> Stefan Hajnoczi (2): subprojects: add probe crate tracetool: add Rust DTrace/SystemTap SDT support rust/Cargo.lock | 6 ++ rust/hw/char/pl011/meson.build | 1 + rust/hw/timer/hpet/meson.build | 1 + rust/meson.build | 2 + rust/trace/Cargo.toml | 1 + rust/trace/meson.build | 2 +- scripts/archive-source.sh | 1 + scripts/make-release | 2 +- scripts/tracetool/__init__.py | 1 + scripts/tracetool/backend/dtrace.py | 32 +++++++++ scripts/tracetool/format/rs.py | 27 ++++++-- subprojects/.gitignore | 1 + .../packagefiles/probe-0.5-rs/meson.build | 22 +++++++ subprojects/probe-0.5-rs.wrap | 7 ++ tests/tracetool/dtrace.rs | 65 +++++++++++++++++++ tests/tracetool/ftrace.rs | 21 ++++++ tests/tracetool/log.rs | 21 ++++++ tests/tracetool/simple.rs | 21 ++++++ tests/tracetool/syslog.rs | 21 ++++++ tests/tracetool/tracetool-test.py | 2 +- 20 files changed, 250 insertions(+), 7 deletions(-) create mode 100644 subprojects/packagefiles/probe-0.5-rs/meson.build create mode 100644 subprojects/probe-0.5-rs.wrap create mode 100644 tests/tracetool/dtrace.rs -- 2.51.1
