assert.cpp@ 106061

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1	/* $Id: assert.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* IPRT - Assertions, common code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include <iprt/assert.h>
42	#include "internal/iprt.h"
43
44	#include <iprt/asm.h>
45	#ifdef IPRT_WITH_ASSERT_STACK
46	# ifndef IN_RING3
47	# error "IPRT_WITH_ASSERT_STACK is only for ring-3 at present."
48	# endif
49	# include <iprt/dbg.h>
50	#endif
51	#include <iprt/errcore.h>
52	#include <iprt/log.h>
53	#include <iprt/string.h>
54	#include <iprt/stdarg.h>
55	#ifdef IN_RING3
56	# include <iprt/env.h>
57	# ifndef IPRT_NO_CRT
58	# include <stdio.h>
59	# endif
60	# ifdef RT_OS_WINDOWS
61	# include <iprt/win/windows.h>
62	# include "../../r3/win/internal-r3-win.h"
63	# endif
64	#endif
65	#include "internal/assert.h"
66
67
68	/*********************************************************************************************************************************
69	* Global Variables *
70	*********************************************************************************************************************************/
71	/** The last assertion message, 1st part. */
72	RTDATADECL(char) g_szRTAssertMsg1[1024];
73	RT_EXPORT_SYMBOL(g_szRTAssertMsg1);
74	/** The last assertion message, 2nd part. */
75	RTDATADECL(char) g_szRTAssertMsg2[4096];
76	RT_EXPORT_SYMBOL(g_szRTAssertMsg2);
77	#ifdef IPRT_WITH_ASSERT_STACK
78	/** The last assertion message, stack part. */
79	RTDATADECL(char) g_szRTAssertStack[4096];
80	RT_EXPORT_SYMBOL(g_szRTAssertStack);
81	#endif
82	/** The length of the g_szRTAssertMsg2 content.
83	* @remarks Race. */
84	static uint32_t volatile g_cchRTAssertMsg2;
85	/** The last assertion message, expression. */
86	RTDATADECL(const char * volatile) g_pszRTAssertExpr;
87	RT_EXPORT_SYMBOL(g_pszRTAssertExpr);
88	/** The last assertion message, function name. */
89	RTDATADECL(const char * volatile) g_pszRTAssertFunction;
90	RT_EXPORT_SYMBOL(g_pszRTAssertFunction);
91	/** The last assertion message, file name. */
92	RTDATADECL(const char * volatile) g_pszRTAssertFile;
93	RT_EXPORT_SYMBOL(g_pszRTAssertFile);
94	/** The last assertion message, line number. */
95	RTDATADECL(uint32_t volatile) g_u32RTAssertLine;
96	RT_EXPORT_SYMBOL(g_u32RTAssertLine);
97
98
99	/** Set if assertions are quiet. */
100	static bool volatile g_fQuiet = false;
101	/** Set if assertions may panic. */
102	static bool volatile g_fMayPanic = true;
103
104
105	RTDECL(bool) RTAssertSetQuiet(bool fQuiet)
106	{
107	return ASMAtomicXchgBool(&g_fQuiet, fQuiet);
108	}
109	RT_EXPORT_SYMBOL(RTAssertSetQuiet);
110
111
112	RTDECL(bool) RTAssertAreQuiet(void)
113	{
114	return ASMAtomicUoReadBool(&g_fQuiet);
115	}
116	RT_EXPORT_SYMBOL(RTAssertAreQuiet);
117
118
119	RTDECL(bool) RTAssertSetMayPanic(bool fMayPanic)
120	{
121	return ASMAtomicXchgBool(&g_fMayPanic, fMayPanic);
122	}
123	RT_EXPORT_SYMBOL(RTAssertSetMayPanic);
124
125
126	RTDECL(bool) RTAssertMayPanic(void)
127	{
128	return ASMAtomicUoReadBool(&g_fMayPanic);
129	}
130	RT_EXPORT_SYMBOL(RTAssertMayPanic);
131
132
133	RTDECL(void) RTAssertMsg1(const char pszExpr, unsigned uLine, const char pszFile, const char *pszFunction)
134	{
135	/*
136	* Fill in the globals.
137	*/
138	ASMAtomicUoWritePtr(&g_pszRTAssertExpr, pszExpr);
139	ASMAtomicUoWritePtr(&g_pszRTAssertFile, pszFile);
140	ASMAtomicUoWritePtr(&g_pszRTAssertFunction, pszFunction);
141	ASMAtomicUoWriteU32(&g_u32RTAssertLine, uLine);
142	RTStrPrintf(g_szRTAssertMsg1, sizeof(g_szRTAssertMsg1),
143	"\n!!Assertion Failed!!\n"
144	"Expression: %s\n"
145	"Location : %s(%d) %s\n",
146	pszExpr, pszFile, uLine, pszFunction);
147
148	/*
149	* If not quiet, make noise.
150	*/
151	if (!RTAssertAreQuiet())
152	{
153	RTERRVARS SavedErrVars;
154	RTErrVarsSave(&SavedErrVars);
155
156	#ifdef IPRT_WITH_ASSERT_STACK
157	/* The stack dump. */
158	static volatile bool s_fDumpingStackAlready = false; /* for simple recursion prevention */
159	char szStack[sizeof(g_szRTAssertStack)];
160	size_t cchStack = 0;
161	# if defined(IN_RING3) && defined(RT_OS_WINDOWS) /** @todo make this stack on/off thing more modular. */
162	bool fStack = (!g_pfnIsDebuggerPresent \|\| !g_pfnIsDebuggerPresent()) && !RTEnvExist("IPRT_ASSERT_NO_STACK");
163	# elif defined(IN_RING3)
164	bool fStack = !RTEnvExist("IPRT_ASSERT_NO_STACK");
165	# else
166	bool fStack = true;
167	# endif
168	szStack[0] = '\0';
169	if (fStack && !s_fDumpingStackAlready)
170	{
171	s_fDumpingStackAlready = true;
172	cchStack = RTDbgStackDumpSelf(szStack, sizeof(szStack), 0);
173	s_fDumpingStackAlready = false;
174	}
175	memcpy(g_szRTAssertStack, szStack, cchStack + 1);
176	#endif
177
178	#ifdef IN_RING0
179	# ifdef IN_GUEST_R0
180	RTLogBackdoorPrintf("\n!!Assertion Failed!!\n"
181	"Expression: %s\n"
182	"Location : %s(%d) %s\n",
183	pszExpr, pszFile, uLine, pszFunction);
184	# endif
185	/** @todo fully integrate this with the logger... play safe a bit for now. */
186	rtR0AssertNativeMsg1(pszExpr, uLine, pszFile, pszFunction);
187
188	#else /* !IN_RING0 */
189
190
191	# if defined(IN_RING3) && (defined(IN_RT_STATIC) \|\| defined(IPRT_NO_CRT)) /* ugly */
192	if (g_pfnRTLogAssert)
193	g_pfnRTLogAssert(
194	# else
195	RTLogAssert(
196	# endif
197	"\n!!Assertion Failed!!\n"
198	"Expression: %s\n"
199	"Location : %s(%d) %s\n"
200	# ifdef IPRT_WITH_ASSERT_STACK
201	"Stack :\n%s\n"
202	# endif
203	, pszExpr, pszFile, uLine, pszFunction
204	# ifdef IPRT_WITH_ASSERT_STACK
205	, szStack
206	# endif
207	);
208
209	# ifdef IN_RING3
210	/* print to stderr, helps user and gdb debugging. */
211	# ifndef IPRT_NO_CRT
212	fprintf(stderr,
213	"\n!!Assertion Failed!!\n"
214	"Expression: %s\n"
215	"Location : %s(%d) %s\n",
216	RT_VALID_PTR(pszExpr) ? pszExpr : "<none>",
217	RT_VALID_PTR(pszFile) ? pszFile : "<none>",
218	uLine,
219	RT_VALID_PTR(pszFunction) ? pszFunction : "");
220	# ifdef IPRT_WITH_ASSERT_STACK
221	fprintf(stderr, "Stack :\n%s\n", szStack);
222	# endif
223	fflush(stderr);
224	# else
225	char szMsg[2048];
226	size_t cchMsg = RTStrPrintf(szMsg, sizeof(szMsg),
227	"\n!!Assertion Failed!!\n"
228	"Expression: %s\n"
229	"Location : %s(%d) %s\n",
230	RT_VALID_PTR(pszExpr) ? pszExpr : "<none>",
231	RT_VALID_PTR(pszFile) ? pszFile : "<none>",
232	uLine,
233	RT_VALID_PTR(pszFunction) ? pszFunction : "");
234	RTLogWriteStdErr(szMsg, cchMsg);
235	# ifdef IPRT_WITH_ASSERT_STACK
236	RTLogWriteStdErr(RT_STR_TUPLE("Stack :\n"));
237	RTLogWriteStdErr(szStack, strlen(szStack));
238	RTLogWriteStdErr(RT_STR_TUPLE("\n"));
239	# endif
240	# endif
241	# endif
242	#endif /* !IN_RING0 */
243
244	RTErrVarsRestore(&SavedErrVars);
245	}
246	}
247	RT_EXPORT_SYMBOL(RTAssertMsg1);
248
249
250	/**
251	* Worker for RTAssertMsg2V and RTAssertMsg2AddV
252	*
253	* @param fInitial True if it's RTAssertMsg2V, otherwise false.
254	* @param pszFormat The message format string.
255	* @param va The format arguments.
256	*/
257	static void rtAssertMsg2Worker(bool fInitial, const char *pszFormat, va_list va)
258	{
259	va_list vaCopy;
260	size_t cch;
261
262	/*
263	* The global first.
264	*/
265	if (fInitial)
266	{
267	va_copy(vaCopy, va);
268	cch = RTStrPrintfV(g_szRTAssertMsg2, sizeof(g_szRTAssertMsg2), pszFormat, vaCopy);
269	ASMAtomicWriteU32(&g_cchRTAssertMsg2, (uint32_t)cch);
270	va_end(vaCopy);
271	}
272	else
273	{
274	cch = ASMAtomicReadU32(&g_cchRTAssertMsg2);
275	if (cch < sizeof(g_szRTAssertMsg2) - 4)
276	{
277	va_copy(vaCopy, va);
278	cch += RTStrPrintfV(&g_szRTAssertMsg2[cch], sizeof(g_szRTAssertMsg2) - cch, pszFormat, vaCopy);
279	ASMAtomicWriteU32(&g_cchRTAssertMsg2, (uint32_t)cch);
280	va_end(vaCopy);
281	}
282	}
283
284	/*
285	* If not quiet, make some noise.
286	*/
287	if (!RTAssertAreQuiet())
288	{
289	RTERRVARS SavedErrVars;
290	RTErrVarsSave(&SavedErrVars);
291
292	#ifdef IN_RING0
293	# ifdef IN_GUEST_R0
294	va_copy(vaCopy, va);
295	RTLogBackdoorPrintfV(pszFormat, vaCopy);
296	va_end(vaCopy);
297	# endif
298	/** @todo fully integrate this with the logger... play safe a bit for now. */
299	rtR0AssertNativeMsg2V(fInitial, pszFormat, va);
300
301	#else /* !IN_RING0 */
302
303	# if defined(IN_RING3) && (defined(IN_RT_STATIC) \|\| defined(IPRT_NO_CRT))
304	if (g_pfnRTLogAssert)
305	# endif
306	{
307	va_copy(vaCopy, va);
308	# if defined(IN_RING3) && (defined(IN_RT_STATIC) \|\| defined(IPRT_NO_CRT))
309	g_pfnRTLogAssertV(pszFormat, vaCopy);
310	# else
311	RTLogAssertV(pszFormat, vaCopy);
312	# endif
313	va_end(vaCopy);
314	}
315
316	# ifdef IN_RING3
317	/* print to stderr, helps user and gdb debugging. */
318	char szMsg[sizeof(g_szRTAssertMsg2)];
319	va_copy(vaCopy, va);
320	size_t cchMsg = RTStrPrintfV(szMsg, sizeof(szMsg), pszFormat, vaCopy);
321	va_end(vaCopy);
322	# ifndef IPRT_NO_CRT
323	fwrite(szMsg, 1, cchMsg, stderr);
324	fflush(stderr);
325	# else
326	RTLogWriteStdErr(szMsg, cchMsg);
327	# endif
328	# endif
329	#endif /* !IN_RING0 */
330
331	RTErrVarsRestore(&SavedErrVars);
332	}
333	}
334
335
336	RTDECL(void) RTAssertMsg2V(const char *pszFormat, va_list va)
337	{
338	rtAssertMsg2Worker(true /fInitial/, pszFormat, va);
339	}
340	RT_EXPORT_SYMBOL(RTAssertMsg2V);
341
342
343	RTDECL(void) RTAssertMsg2AddV(const char *pszFormat, va_list va)
344	{
345	rtAssertMsg2Worker(false /fInitial/, pszFormat, va);
346	}
347	RT_EXPORT_SYMBOL(RTAssertMsg2AddV);
348

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source: vbox/trunk/src/VBox/Runtime/common/misc/assert.cpp@ 106061

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