Tree:
74a303a813
cfallin/lucet-pr612-base
fitzgen-patch-1
main
pch/bound_tcp_userland_buffer
pch/bump_wasm_tools_210
pch/cli_wasi_legacy
pch/component_call_hooks
pch/resource_table
pch/resource_table_2
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revert-union-find
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trevor/fuzz-pcc
trevor/hyper-rc4
trevor/io-error-interface
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${ noResults }
2 Commits (74a303a813856baea665fe6ad9545c02836d0f09)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Tyler Rockwood
|
85c0a2df54
|
Switch to simpler fuel APIs (#7298)
In an effort to simplify the many fuel related APIs, simplify the interface here to a single counter with get and set methods. Additionally the async yield is reduced to an interval of the total fuel instead of injecting fuel, so it's easy to still reason about how much fuel is left even with yielding turned on. Internally this works by keeping two counters - one the VM uses to increment towards 0 for fuel, the other to track how much is in "reserve". Then when we're out of gas, we pull from the reserve to refuel and continue. We use the reserve in two cases: one for overflow of the fuel (which is an i64 and the API expresses fuel as u64) and the other for async yieling, which then the yield interval acts as a cap to how much we can refuel with. This also means that `get_fuel` can return the full range of `u64` before this change it could only return up to `i64::MAX`. This is important because this PR is removing the functionality to track fuel consumption, and this makes the API less error prone for embedders to track consumption themselves. Careful to note that the VM counter that is stored as `i64` can be positive if an instruction "costs" multiple units of fuel when the fuel ran out. prtest:full Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> |
1 year ago |
|
Tyler Rockwood
|
37cf8e1e75
|
Async support in the C API (#7106)
* c-api: Add a feature for async Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Add support for async config Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Add support for calling async functions Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Add ability to yield execution of Wasm in a store Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Introduce wasmtime_linker_instantiate_async Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Support defining async host functions Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * gitignore: ignore cmake cache for examples Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * examples: Add example of async API in C Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Consolidate async functionality into a single place Put all the async stuff in it's own header and own rust source file Also remove the wasmtime_async_continuation_new function, users can just allocate it directly. Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Make async function safe Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Remove wasmtime_call_future_get_results Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Simplify CHostCallFuture Move the result translation and hostcall_val_storage usage into an async function Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Simplify C continuation implementation Remove the caller, which means that we don't need another struct for the future implementation. Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Improve async.h documentation Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Cleanup from previous changes Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * examples: Fix example Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Simplify continuation callback This gives more duality with calling an async function and also means that the implementation can pretty much mirror the sync version. Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Fix async.h documentation Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Fix documentation for async.h Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: Review feedback Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * examples: Downgrade async.cpp example to C++11 Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * c-api: initialize continuation with a panic callback Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> * prtest:full Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> --------- Signed-off-by: Tyler Rockwood <rockwood@redpanda.com> |
1 year ago |