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53 lines
2.1 KiB
C++
53 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SandboxLogging_h
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#define mozilla_SandboxLogging_h
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// This header defines the SANDBOX_LOG_ERROR macro used in the Linux
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// sandboxing code. It uses Android logging on Android and writes to
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// stderr otherwise. Android logging has severity levels; currently
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// only "error" severity is exposed here, and this isn't marked when
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// writing to stderr.
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//
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// The format strings are processed by Chromium SafeSPrintf, which
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// doesn't accept size modifiers or %u because it uses C++11 variadic
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// templates to obtain the actual argument types; all decimal integer
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// formatting uses %d. See safe_sprintf.h for more details.
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// Build SafeSPrintf without assertions to avoid a dependency on
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// Chromium logging. This doesn't affect safety; it just means that
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// type mismatches (pointer vs. integer) always result in unexpanded
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// %-directives instead of crashing. See also the moz.build files,
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// which apply NDEBUG to the .cc file.
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#ifndef NDEBUG
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#define NDEBUG 1
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#include "base/strings/safe_sprintf.h"
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#undef NDEBUG
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#else
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#include "base/strings/safe_sprintf.h"
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#endif
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namespace mozilla {
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// Logs the formatted string (marked with "error" severity, if supported).
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void SandboxLogError(const char* aMessage);
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}
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#define SANDBOX_LOG_LEN 256
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// Formats a log message and logs it (with "error" severity, if supported).
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//
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// Note that SafeSPrintf doesn't accept size modifiers or %u; all
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// decimal integers are %d, because it uses C++11 variadic templates
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// to use the actual argument type.
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#define SANDBOX_LOG_ERROR(fmt, args...) do { \
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char _sandboxLogBuf[SANDBOX_LOG_LEN]; \
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::base::strings::SafeSPrintf(_sandboxLogBuf, fmt, ## args); \
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::mozilla::SandboxLogError(_sandboxLogBuf); \
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} while(0)
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#endif // mozilla_SandboxLogging_h
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