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The new monitor component at os/src/monitor is the designated successor of the gdb_monitor. This initial version, however, implements only the subset needed to inspect the memory of the monitored component(s). In contrast to the gdb_monitor, the new component supports the monitoring of multiple components, leveraging the sandbox API. It can therefore be used as a drop-in replacement for the init component. Like the gdb_monitor, the new monitor speaks the GDB protocol over Genode's terminal session. But the protocol implementation does not re-use any gdbserver code, sidestepping the complexities of POSIX. There exist two run scripts illustrating the new component. The os/run/monitor.run script exercises memory inspection via the 'm' command by letting a test program monitor itself. The os/run/monitor_gdb.run script allows for the interactive use of GDB to interact with monitored components. Issue #4917
77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
/*
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* \brief Parsing utilities
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* \author Norman Feske
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* \date 2023-06-06
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*/
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/*
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* Copyright (C) 2023 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _MONITOR__STRING_H_
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#define _MONITOR__STRING_H_
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#include <util/string.h>
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namespace Genode {
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static void with_max_bytes(Const_byte_range_ptr const &bytes,
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size_t const max, auto const &fn)
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{
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fn(Const_byte_range_ptr { bytes.start, min(max, bytes.num_bytes) });
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}
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static void with_skipped_bytes(Const_byte_range_ptr const &bytes,
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size_t const n, auto const &fn)
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{
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if (bytes.num_bytes < n)
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return;
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Const_byte_range_ptr const remainder { bytes.start + n,
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bytes.num_bytes - n };
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fn(remainder);
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}
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static void with_skipped_prefix(Const_byte_range_ptr const &bytes,
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Const_byte_range_ptr const &prefix,
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auto const &fn)
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{
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if (bytes.num_bytes < prefix.num_bytes)
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return;
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if (strcmp(prefix.start, bytes.start, prefix.num_bytes) != 0)
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return;
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with_skipped_bytes(bytes, prefix.num_bytes, fn);
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}
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static void with_skipped_prefix(Const_byte_range_ptr const &bytes,
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char const *prefix, auto const &fn)
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{
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with_skipped_prefix(bytes, Const_byte_range_ptr { prefix, strlen(prefix) }, fn);
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}
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template <size_t N>
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static void with_skipped_prefix(Const_byte_range_ptr const &bytes,
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String<N> const &prefix, auto const &fn)
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{
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with_skipped_prefix(bytes, prefix.string(), fn);
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}
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/**
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* Return true if 'bytes' equals the null-terminated string 'str'
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*/
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static inline bool equal(Const_byte_range_ptr const &bytes, char const *str)
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{
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size_t const len = strlen(str);
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return (len == bytes.num_bytes) && (strcmp(bytes.start, str, len) == 0);
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}
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}
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#endif /* _MONITOR__STRING_H_ */
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