1// Copyright 2025 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// The C definitions for tracebackctxt.go. That file uses //export so
6// it can't put function definitions in the "C" import comment.
7
8#include <stdint.h>
9#include <stdio.h>
10
11// Functions exported from Go.
12extern void G1(void);
13extern void G2(void);
14
15void C1() {
16 G1();
17}
18
19void C2() {
20 G2();
21}
22
23struct cgoContextArg {
24 uintptr_t context;
25};
26
27struct cgoTracebackArg {
28 uintptr_t context;
29 uintptr_t sigContext;
30 uintptr_t* buf;
31 uintptr_t max;
32};
33
34struct cgoSymbolizerArg {
35 uintptr_t pc;
36 const char* file;
37 uintptr_t lineno;
38 const char* func;
39 uintptr_t entry;
40 uintptr_t more;
41 uintptr_t data;
42};
43
44void tcContext(void* parg) {
45 struct cgoContextArg* arg = (struct cgoContextArg*)(parg);
46 if (arg->context == 0) {
47 arg->context = 1;
48 }
49}
50
51void tcTraceback(void* parg) {
52 int base, i;
53 struct cgoTracebackArg* arg = (struct cgoTracebackArg*)(parg);
54 if (arg->max < 1) {
55 return;
56 }
57 arg->buf[0] = 6; // Chosen by fair dice roll.
58}
59
60void tcSymbolizer(void *parg) {
61 struct cgoSymbolizerArg* arg = (struct cgoSymbolizerArg*)(parg);
62 if (arg->pc == 0) {
63 return;
64 }
65 // Report two lines per PC returned by traceback, to test more handling.
66 arg->more = arg->file == NULL;
67 arg->file = "tracebackctxt.go";
68 arg->func = "cFunction";
69 arg->lineno = arg->pc + (arg->more << 16);
70}
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