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refactor(snapshot.rs): use const generics (#2069)

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* refactor(snapshot.rs): use const generics

* Add docs to read hooks

---------

Co-authored-by: Romain Malmain <romain.malmain@pm.me>
This commit is contained in:
Stefan Zabka 2024-04-24 11:58:46 +02:00 committed by GitHub
parent 176659821a
commit 0f42efa12b
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GPG Key ID: B5690EEEBB952194
2 changed files with 18 additions and 45 deletions
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12
libafl_qemu/src/emu.rs
View File

@ -1161,6 +1161,18 @@ impl Qemu {
}
}
/// `data` can be used to pass data that can be accessed as the first argument in the `gen` and the `exec` functions
///
/// `gen` gets passed the current programm counter, mutable access to a `TCGTemp` and information about the memory
/// access being performed.
/// The `u64` return value is an id that gets passed to the `exec` functions as their second argument.
///
/// `exec` hooks get invoked on every read performed by the guest
///
/// `exec1`-`exec8` special case accesses of width 1-8
///
/// If there is no specialized hook for a given read width, the `exec_n` will be
/// called and its last argument will specify the access width
#[allow(clippy::missing_transmute_annotations)]
pub fn add_read_hooks<T: Into<HookData>>(
&self,

51
libafl_qemu/src/snapshot.rs
View File

@ -498,10 +498,10 @@ where
// The ASan helper, if present, will call the tracer hook for the snapshot helper as opt
hooks.writes(
Hook::Empty,
Hook::Function(trace_write1_snapshot::<QT, S>),
Hook::Function(trace_write2_snapshot::<QT, S>),
Hook::Function(trace_write4_snapshot::<QT, S>),
Hook::Function(trace_write8_snapshot::<QT, S>),
Hook::Function(trace_write_snapshot::<QT, S, 1>),
Hook::Function(trace_write_snapshot::<QT, S, 2>),
Hook::Function(trace_write_snapshot::<QT, S, 4>),
Hook::Function(trace_write_snapshot::<QT, S, 8>),
Hook::Function(trace_write_n_snapshot::<QT, S>),
);
}
@ -521,7 +521,7 @@ where
}
}
pub fn trace_write1_snapshot<QT, S>(
pub fn trace_write_snapshot<QT, S, const SIZE: usize>(
hooks: &mut QemuHooks<QT, S>,
_state: Option<&mut S>,
_id: u64,
@ -531,46 +531,7 @@ pub fn trace_write1_snapshot<QT, S>(
QT: QemuHelperTuple<S>,
{
let h = hooks.match_helper_mut::<QemuSnapshotHelper>().unwrap();
h.access(addr, 1);
}
pub fn trace_write2_snapshot<QT, S>(
hooks: &mut QemuHooks<QT, S>,
_state: Option<&mut S>,
_id: u64,
addr: GuestAddr,
) where
S: UsesInput,
QT: QemuHelperTuple<S>,
{
let h = hooks.match_helper_mut::<QemuSnapshotHelper>().unwrap();
h.access(addr, 2);
}
pub fn trace_write4_snapshot<QT, S>(
hooks: &mut QemuHooks<QT, S>,
_state: Option<&mut S>,
_id: u64,
addr: GuestAddr,
) where
S: UsesInput,
QT: QemuHelperTuple<S>,
{
let h = hooks.match_helper_mut::<QemuSnapshotHelper>().unwrap();
h.access(addr, 4);
}
pub fn trace_write8_snapshot<QT, S>(
hooks: &mut QemuHooks<QT, S>,
_state: Option<&mut S>,
_id: u64,
addr: GuestAddr,
) where
S: UsesInput,
QT: QemuHelperTuple<S>,
{
let h = hooks.match_helper_mut::<QemuSnapshotHelper>().unwrap();
h.access(addr, 8);
h.access(addr, SIZE);
}
pub fn trace_write_n_snapshot<QT, S>(