gecko-dev/memory/mozalloc/mozalloc_oom.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=4 et :
*/
2012-05-21 11:12:37 +00:00
/* 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/. */
#include "mozilla/mozalloc_abort.h"
#include "mozilla/mozalloc_oom.h"
#include "mozilla/Assertions.h"
static mozalloc_oom_abort_handler gAbortHandler;
#define OOM_MSG_LEADER "out of memory: 0x"
#define OOM_MSG_DIGITS "0000000000000000" // large enough for 2^64
#define OOM_MSG_TRAILER " bytes requested"
#define OOM_MSG_FIRST_DIGIT_OFFSET sizeof(OOM_MSG_LEADER) - 1
#define OOM_MSG_LAST_DIGIT_OFFSET sizeof(OOM_MSG_LEADER) + \
sizeof(OOM_MSG_DIGITS) - 3
static const char *hex = "0123456789ABCDEF";
void
mozalloc_handle_oom(size_t size)
{
char oomMsg[] = OOM_MSG_LEADER OOM_MSG_DIGITS OOM_MSG_TRAILER;
size_t i;
// NB: this is handle_oom() stage 1, which simply aborts on OOM.
// we might proceed to a stage 2 in which an attempt is made to
// reclaim memory
if (gAbortHandler)
gAbortHandler(size);
Bug 895322 - Part 1: Replace the usages of MOZ_STATIC_ASSERT with C++11 static_assert; r=Waldo This patch was mostly generated by running the following scripts on the codebase, with some manual changes made afterwards: # static_assert.sh #!/bin/bash # Command to convert an NSPR integer type to the equivalent standard integer type function convert() { echo "Converting $1 to $2..." find . ! -wholename "*nsprpub*" \ ! -wholename "*security/nss*" \ ! -wholename "*/.hg*" \ ! -wholename "obj-ff-dbg*" \ ! -name nsXPCOMCID.h \ ! -name prtypes.h \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.cc" \ -o -iname "*.mm" \) | \ xargs -n 1 `dirname $0`/assert_replacer.py #sed -i -e "s/\b$1\b/$2/g" } convert MOZ_STATIC_ASSERT static_assert hg rev --no-backup mfbt/Assertions.h \ media/webrtc/signaling/src/sipcc/core/includes/ccapi.h \ modules/libmar/src/mar_private.h \ modules/libmar/src/mar.h # assert_replacer.py #!/usr/bin/python import sys import re pattern = re.compile(r"\bMOZ_STATIC_ASSERT\b") def replaceInPlace(fname): print fname f = open(fname, "rw+") lines = f.readlines() for i in range(0, len(lines)): while True: index = re.search(pattern, lines[i]) if index != None: index = index.start() lines[i] = lines[i][0:index] + "static_assert" + lines[i][index+len("MOZ_STATIC_ASSERT"):] for j in range(i + 1, len(lines)): if lines[j].find(" ", index) == index: lines[j] = lines[j][0:index] + lines[j][index+4:] else: break else: break f.seek(0, 0) f.truncate() f.write("".join(lines)) f.close() argc = len(sys.argv) for i in range(1, argc): replaceInPlace(sys.argv[i]) --HG-- extra : rebase_source : 4b4a4047d82f2c205b9fad8d56dfc3f1afc0b045
2013-07-18 17:59:53 +00:00
static_assert(OOM_MSG_FIRST_DIGIT_OFFSET > 0,
"Loop below will never terminate (i can't go below 0)");
// Insert size into the diagnostic message using only primitive operations
for (i = OOM_MSG_LAST_DIGIT_OFFSET;
size && i >= OOM_MSG_FIRST_DIGIT_OFFSET; i--) {
oomMsg[i] = hex[size % 16];
size /= 16;
}
mozalloc_abort(oomMsg);
}
void
mozalloc_set_oom_abort_handler(mozalloc_oom_abort_handler handler)
{
gAbortHandler = handler;
}