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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/src/wasm/WasmSummarizeInsn.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef wasm_WasmSummarizeInsn_h
+#define wasm_WasmSummarizeInsn_h
+
+#include "mozilla/Maybe.h"
+#include "wasm/WasmCodegenTypes.h" // TrapMachineInsn
+
+namespace js {
+namespace wasm {
+
+#ifdef DEBUG
+
+// Inspect the machine instruction at `insn` and return a classification as to
+// what it is. If the instruction can't be identified, return
+// `mozilla::Nothing`. If the instruction is identified, the identification
+// must be correct -- in other words, if a `mozilla::Some(i)` is returned, `i`
+// must be the correct classification for the instruction. Return
+// `mozilla::Nothing` in case of doubt.
+//
+// This function is only used by ModuleGenerator::finishCodeTier to audit wasm
+// trap sites. So it doesn't need to handle the whole complexity of the
+// machine's instruction set. It only needs to handle the tiny sub-dialect
+// used by the trappable instructions we actually generate.
+mozilla::Maybe<TrapMachineInsn> SummarizeTrapInstruction(const uint8_t* insn);
+
+#endif
+
+} // namespace wasm
+} // namespace js
+
+#endif /* wasm_WasmSummarizeInsn_h */