michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef jscrashformat_h
michael@0: #define jscrashformat_h
michael@0: 
michael@0: namespace js {
michael@0: namespace crash {
michael@0: 
michael@0: static const int crash_cookie_len = 16;
michael@0: static const char crash_cookie[crash_cookie_len] = "*J*S*CRASHDATA*";
michael@0: 
michael@0: /* These values are used for CrashHeader::id. */
michael@0: enum {
michael@0:     JS_CRASH_STACK_GC = 0x400,
michael@0:     JS_CRASH_STACK_ERROR = 0x401,
michael@0:     JS_CRASH_RING = 0x800
michael@0: };
michael@0: 
michael@0: /*
michael@0:  * All the data here will be stored directly in the minidump, so we use
michael@0:  * platform-independent types. We also ensure that the size of every field is a
michael@0:  * multiple of 8 bytes, to guarantee that they won't be padded.
michael@0:  */
michael@0: 
michael@0: struct CrashHeader
michael@0: {
michael@0:     char cookie[crash_cookie_len];
michael@0: 
michael@0:     /* id of the crash data, chosen from the enum above. */
michael@0:     uint64_t id;
michael@0: 
michael@0:     CrashHeader(uint64_t id) : id(id) { memcpy(cookie, crash_cookie, crash_cookie_len); }
michael@0: };
michael@0: 
michael@0: struct CrashRegisters
michael@0: {
michael@0:     uint64_t ip, sp, bp;
michael@0: };
michael@0: 
michael@0: static const int crash_buffer_size = 32 * 1024;
michael@0: 
michael@0: struct CrashStack
michael@0: {
michael@0:     CrashStack(uint64_t id) : header(id) {}
michael@0: 
michael@0:     CrashHeader header;
michael@0:     uint64_t snaptime;    /* Unix time when the stack was snapshotted. */
michael@0:     CrashRegisters regs;  /* Register contents for the snapshot. */
michael@0:     uint64_t stack_base;  /* Base address of stack at the time of snapshot. */
michael@0:     uint64_t stack_len;   /* Extent of the stack. */
michael@0:     char stack[crash_buffer_size]; /* Contents of the stack. */
michael@0: };
michael@0: 
michael@0: struct CrashRing
michael@0: {
michael@0:     CrashRing(uint64_t id) : header(id), offset(0) { memset(buffer, 0, sizeof(buffer)); }
michael@0: 
michael@0:     CrashHeader header;
michael@0:     uint64_t offset; /* Next byte to be written in the buffer. */
michael@0:     char buffer[crash_buffer_size];
michael@0: };
michael@0: 
michael@0: /* These are the tag values for each entry in the CrashRing. */
michael@0: enum {
michael@0:     JS_CRASH_TAG_GC = 0x200
michael@0: };
michael@0: 
michael@0: } /* namespace crash */
michael@0: } /* namespace js */
michael@0: 
michael@0: #endif /* jscrashformat_h */