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https://github.com/izzy2lost/xemu.git
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42f73f264a
Signed-off-by: Tanish Desai <tanishdesai37@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20250929154938.594389-13-pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
108 lines
3.0 KiB
Python
108 lines
3.0 KiB
Python
# SPDX-License-Identifier: GPL-2.0-or-later
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"""
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Simple built-in backend.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@redhat.com"
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from tracetool import out
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PUBLIC = True
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CHECK_TRACE_EVENT_GET_STATE = True
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def is_string(arg):
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strtype = ('const char*', 'char*', 'const char *', 'char *')
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arg_strip = arg.lstrip()
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if arg_strip.startswith(strtype) and arg_strip.count('*') == 1:
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return True
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else:
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return False
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def generate_h_begin(events, group):
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for event in events:
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out('void _simple_%(api)s(%(args)s);',
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api=event.api(),
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args=event.args)
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out('')
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def generate_h(event, group):
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out(' _simple_%(api)s(%(args)s);',
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api=event.api(),
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args=", ".join(event.args.names()))
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def generate_h_backend_dstate(event, group):
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out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
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event_id="TRACE_" + event.name.upper())
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def generate_c_begin(events, group):
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out('#include "qemu/osdep.h"',
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'#include "trace/control.h"',
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'#include "trace/simple.h"',
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'')
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def generate_c(event, group):
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out('void _simple_%(api)s(%(args)s)',
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'{',
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' TraceBufferRecord rec;',
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api=event.api(),
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args=event.args)
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sizes = []
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for type_, name in event.args:
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if is_string(type_):
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out(' size_t arg%(name)s_len = %(name)s ? MIN(strlen(%(name)s), MAX_TRACE_STRLEN) : 0;',
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name=name)
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strsizeinfo = "4 + arg%s_len" % name
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sizes.append(strsizeinfo)
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else:
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sizes.append("8")
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sizestr = " + ".join(sizes)
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if len(event.args) == 0:
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sizestr = '0'
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out('',
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' if (trace_record_start(&rec, %(event_obj)s.id, %(size_str)s)) {',
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' return; /* Trace Buffer Full, Event Dropped ! */',
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' }',
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event_obj=event.api(event.QEMU_EVENT),
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size_str=sizestr)
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if len(event.args) > 0:
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for type_, name in event.args:
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# string
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if is_string(type_):
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out(' trace_record_write_str(&rec, %(name)s, arg%(name)s_len);',
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name=name)
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# pointer var (not string)
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elif type_.endswith('*'):
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out(' trace_record_write_u64(&rec, (uintptr_t)(uint64_t *)%(name)s);',
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name=name)
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# primitive data type
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else:
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out(' trace_record_write_u64(&rec, (uint64_t)%(name)s);',
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name=name)
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out(' trace_record_finish(&rec);',
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'}',
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'')
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def generate_rs(event, group):
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out(' extern "C" { fn _simple_%(api)s(%(rust_args)s); }',
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' unsafe { _simple_%(api)s(%(args)s); }',
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api=event.api(),
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rust_args=event.args.rust_decl_extern(),
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args=event.args.rust_call_extern())
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