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| author | Alan Wu <XrXr@users.noreply.github.com> | 2021-08-25 17:00:45 -0400 |
|---|---|---|
| committer | Alan Wu <XrXr@users.noreply.github.com> | 2021-10-20 18:19:39 -0400 |
| commit | bd876c243aeace00ea312d0a5bbff091ccc84ba2 (patch) | |
| tree | e30156ab87c3345a995dcd47c11dc9a535643694 /yjit_codegen.h | |
| parent | 0562459473f44c270784074a09a33ea30d68e457 (diff) | |
TracePoint support
This change fixes some cases where YJIT fails to fire tracing events.
Most of the situations YJIT did not handle correctly involves enabling
tracing while running inside generated code.
A new operation to invalidate all generated code is added, which uses
patching to make generated code exit at the next VM instruction
boundary. A new routine called `jit_prepare_routine_call()` is
introduced to facilitate this and should be used when generating code
that could allocate, or could otherwise use `RB_VM_LOCK_ENTER()`.
The `c_return` event is fired in the middle of an instruction as opposed
to at an instruction boundary, so it requires special handling. C method
call return points are patched to go to a fucntion which does everything
the interpreter does, including firing the `c_return` event. The
generated code for C method calls normally does not fire the event.
Invalided code should not change after patching so the exits are not
clobbered. A new variable is introduced to track the region of code that
should not change.
Diffstat (limited to 'yjit_codegen.h')
| -rw-r--r-- | yjit_codegen.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/yjit_codegen.h b/yjit_codegen.h index 7041a5a0a5..260d379a5d 100644 --- a/yjit_codegen.h +++ b/yjit_codegen.h @@ -7,6 +7,7 @@ // Code blocks we generate code into extern codeblock_t *cb; extern codeblock_t *ocb; +extern uint32_t yjit_codepage_frozen_bytes; // Code generation state typedef struct JITState @@ -30,6 +31,10 @@ typedef struct JITState // This allows us to peek at run-time values rb_execution_context_t* ec; + // Whether we need to record the code address at + // the end of this bytecode instruction for tracing suppoert + bool record_boundary_patch_point; + } jitstate_t; typedef enum codegen_status { |