1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/jit/Jitdump.h b/js/src/jit/Jitdump.h
new file mode 100644
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+++ b/js/src/jit/Jitdump.h
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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 jit_JitDump_h
+#define jit_JitDump_h
+
+/*
+   This file provides the necessary data structures to meet the JitDump
+   specification as of
+   https://github.com/torvalds/linux/blob/f2906aa863381afb0015a9eb7fefad885d4e5a56/tools/perf/Documentation/jitdump-specification.txt
+*/
+
+namespace js {
+namespace jit {
+
+// JitDump record types
+enum {
+  JIT_CODE_LOAD = 0,
+  JIT_CODE_MOVE,
+  JIT_CODE_DEBUG_INFO,
+  JIT_CODE_CLOSE,
+  JIT_CODE_UNWINDING_INFO
+};
+
+// File header
+struct JitDumpHeader {
+  uint32_t magic;
+  uint32_t version;
+  uint32_t total_size;
+  uint32_t elf_mach;
+  uint32_t pad1;
+  uint32_t pid;
+  uint64_t timestamp;
+  uint64_t flags;
+};
+
+// Header for each record
+struct JitDumpRecordHeader {
+  uint32_t id;
+  uint32_t total_size;
+  uint64_t timestamp;
+};
+
+// Load record
+struct JitDumpLoadRecord {
+  JitDumpRecordHeader header;
+
+  // Payload
+  uint32_t pid;
+  uint32_t tid;
+  uint64_t vma;
+  uint64_t code_addr;
+  uint64_t code_size;
+  uint64_t code_index;
+};
+
+// Debug record
+struct JitDumpDebugRecord {
+  JitDumpRecordHeader header;
+
+  // Debug header
+  uint64_t code_addr;
+  uint64_t nr_entry;
+};
+
+struct JitDumpDebugEntry {
+  uint64_t code_addr;
+  uint32_t line;
+  uint32_t discrim;
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_JitDump_h */