The Tor Browser: js/src/jscrashformat.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  * This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef jscrashformat_h

     8 #define jscrashformat_h

    10 namespace js {

    11 namespace crash {

    13 static const int crash_cookie_len = 16;

    14 static const char crash_cookie[crash_cookie_len] = "*J*S*CRASHDATA*";

    16 /* These values are used for CrashHeader::id. */

    17 enum {

    18     JS_CRASH_STACK_GC = 0x400,

    19     JS_CRASH_STACK_ERROR = 0x401,

    20     JS_CRASH_RING = 0x800

    21 };

    23 /*

    24  * All the data here will be stored directly in the minidump, so we use

    25  * platform-independent types. We also ensure that the size of every field is a

    26  * multiple of 8 bytes, to guarantee that they won't be padded.

    27  */

    29 struct CrashHeader

    30 {

    31     char cookie[crash_cookie_len];

    33     /* id of the crash data, chosen from the enum above. */

    34     uint64_t id;

    36     CrashHeader(uint64_t id) : id(id) { memcpy(cookie, crash_cookie, crash_cookie_len); }

    37 };

    39 struct CrashRegisters

    40 {

    41     uint64_t ip, sp, bp;

    42 };

    44 static const int crash_buffer_size = 32 * 1024;

    46 struct CrashStack

    47 {

    48     CrashStack(uint64_t id) : header(id) {}

    50     CrashHeader header;

    51     uint64_t snaptime;    /* Unix time when the stack was snapshotted. */

    52     CrashRegisters regs;  /* Register contents for the snapshot. */

    53     uint64_t stack_base;  /* Base address of stack at the time of snapshot. */

    54     uint64_t stack_len;   /* Extent of the stack. */

    55     char stack[crash_buffer_size]; /* Contents of the stack. */

    56 };

    58 struct CrashRing

    59 {

    60     CrashRing(uint64_t id) : header(id), offset(0) { memset(buffer, 0, sizeof(buffer)); }

    62     CrashHeader header;

    63     uint64_t offset; /* Next byte to be written in the buffer. */

    64     char buffer[crash_buffer_size];

    65 };

    67 /* These are the tag values for each entry in the CrashRing. */

    68 enum {

    69     JS_CRASH_TAG_GC = 0x200

    70 };

    72 } /* namespace crash */

    73 } /* namespace js */

    75 #endif /* jscrashformat_h */

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