| 1 | # SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | |
| 3 | """ |
| 4 | Simple built-in backend. |
| 5 | """ |
| 6 | |
| 7 | __author__ = "Lluís Vilanova <vilanova@ac.upc.edu>" |
| 8 | __copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>" |
| 9 | __license__ = "GPL version 2 or (at your option) any later version" |
| 10 | |
| 11 | __maintainer__ = "Stefan Hajnoczi" |
| 12 | __email__ = "stefanha@redhat.com" |
| 13 | |
| 14 | |
| 15 | from tracetool import out |
| 16 | |
| 17 | |
| 18 | PUBLIC = True |
| 19 | CHECK_TRACE_EVENT_GET_STATE = True |
| 20 | |
| 21 | |
| 22 | def is_string(arg): |
| 23 | strtype = ('const char*', 'char*', 'const char *', 'char *') |
| 24 | arg_strip = arg.lstrip() |
| 25 | if arg_strip.startswith(strtype) and arg_strip.count('*') == 1: |
| 26 | return True |
| 27 | else: |
| 28 | return False |
| 29 | |
| 30 | |
| 31 | def generate_h_begin(events, group): |
| 32 | for event in events: |
| 33 | out('void _simple_%(api)s(%(args)s);', |
| 34 | api=event.api(), |
| 35 | args=event.args) |
| 36 | out('') |
| 37 | |
| 38 | |
| 39 | def generate_h(event, group): |
| 40 | out(' _simple_%(api)s(%(args)s);', |
| 41 | api=event.api(), |
| 42 | args=", ".join(event.args.names())) |
| 43 | |
| 44 | |
| 45 | def generate_h_backend_dstate(event, group): |
| 46 | out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\', |
| 47 | event_id="TRACE_" + event.name.upper()) |
| 48 | |
| 49 | |
| 50 | def generate_c_begin(events, group): |
| 51 | out('#include "qemu/osdep.h"', |
| 52 | '#include "trace/control.h"', |
| 53 | '#include "trace/simple.h"', |
| 54 | '') |
| 55 | |
| 56 | |
| 57 | def generate_c(event, group): |
| 58 | out('void _simple_%(api)s(%(args)s)', |
| 59 | '{', |
| 60 | ' TraceBufferRecord rec;', |
| 61 | api=event.api(), |
| 62 | args=event.args) |
| 63 | sizes = [] |
| 64 | for type_, name in event.args: |
| 65 | if is_string(type_): |
| 66 | out(' size_t arg%(name)s_len = %(name)s ? MIN(strlen(%(name)s), MAX_TRACE_STRLEN) : 0;', |
| 67 | name=name) |
| 68 | strsizeinfo = "4 + arg%s_len" % name |
| 69 | sizes.append(strsizeinfo) |
| 70 | else: |
| 71 | sizes.append("8") |
| 72 | sizestr = " + ".join(sizes) |
| 73 | if len(event.args) == 0: |
| 74 | sizestr = '0' |
| 75 | |
| 76 | out('', |
| 77 | ' if (trace_record_start(&rec, %(event_obj)s.id, %(size_str)s)) {', |
| 78 | ' return; /* Trace Buffer Full, Event Dropped ! */', |
| 79 | ' }', |
| 80 | event_obj=event.api(event.QEMU_EVENT), |
| 81 | size_str=sizestr) |
| 82 | |
| 83 | if len(event.args) > 0: |
| 84 | for type_, name in event.args: |
| 85 | # string |
| 86 | if is_string(type_): |
| 87 | out(' trace_record_write_str(&rec, %(name)s, arg%(name)s_len);', |
| 88 | name=name) |
| 89 | # pointer var (not string) |
| 90 | elif type_.endswith('*'): |
| 91 | out(' trace_record_write_u64(&rec, (uintptr_t)(uint64_t *)%(name)s);', |
| 92 | name=name) |
| 93 | # primitive data type |
| 94 | else: |
| 95 | out(' trace_record_write_u64(&rec, (uint64_t)%(name)s);', |
| 96 | name=name) |
| 97 | |
| 98 | out(' trace_record_finish(&rec);', |
| 99 | '}', |
| 100 | '') |
| 101 | |
| 102 | def generate_rs(event, group): |
| 103 | out(' extern "C" { fn _simple_%(api)s(%(rust_args)s); }', |
| 104 | ' unsafe { _simple_%(api)s(%(args)s); }', |
| 105 | api=event.api(), |
| 106 | rust_args=event.args.rust_decl_extern(), |
| 107 | args=event.args.rust_call_extern()) |