[53636] | 1 | /* $Id: VBoxDTraceR0.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
|
---|
| 2 | /** @file
|
---|
| 3 | * VBoxDTraceR0.
|
---|
[53714] | 4 | *
|
---|
| 5 | * Contributed by: bird
|
---|
[53636] | 6 | */
|
---|
[53635] | 7 |
|
---|
[53636] | 8 | /*
|
---|
[98103] | 9 | * Copyright (C) 2012-2023 Oracle and/or its affiliates.
|
---|
[53636] | 10 | *
|
---|
[96407] | 11 | * This file is part of VirtualBox base platform packages, as
|
---|
| 12 | * available from http://www.virtualbox.org.
|
---|
| 13 | *
|
---|
| 14 | * The contents of this file are subject to the terms of the Common
|
---|
[53714] | 15 | * Development and Distribution License Version 1.0 (CDDL) only, as it
|
---|
[96407] | 16 | * comes in the "COPYING.CDDL" file of the VirtualBox distribution.
|
---|
| 17 | *
|
---|
| 18 | * SPDX-License-Identifier: CDDL-1.0
|
---|
[53636] | 19 | */
|
---|
[53635] | 20 |
|
---|
[53645] | 21 |
|
---|
[57358] | 22 | /*********************************************************************************************************************************
|
---|
| 23 | * Header Files *
|
---|
| 24 | *********************************************************************************************************************************/
|
---|
[53635] | 25 | #include <VBox/sup.h>
|
---|
[53667] | 26 | #include <VBox/log.h>
|
---|
[53635] | 27 |
|
---|
[53645] | 28 | #include <iprt/asm-amd64-x86.h>
|
---|
| 29 | #include <iprt/assert.h>
|
---|
[53667] | 30 | #include <iprt/ctype.h>
|
---|
[53645] | 31 | #include <iprt/err.h>
|
---|
| 32 | #include <iprt/mem.h>
|
---|
| 33 | #include <iprt/mp.h>
|
---|
[53669] | 34 | #include <iprt/process.h>
|
---|
[53668] | 35 | #include <iprt/semaphore.h>
|
---|
[53667] | 36 | #include <iprt/spinlock.h>
|
---|
[53645] | 37 | #include <iprt/string.h>
|
---|
[53668] | 38 | #include <iprt/thread.h>
|
---|
[53645] | 39 | #include <iprt/time.h>
|
---|
| 40 |
|
---|
| 41 | #include <sys/dtrace_impl.h>
|
---|
| 42 |
|
---|
[53667] | 43 | #include <VBox/VBoxTpG.h>
|
---|
[53645] | 44 |
|
---|
[53667] | 45 |
|
---|
[57358] | 46 | /*********************************************************************************************************************************
|
---|
| 47 | * Defined Constants And Macros *
|
---|
| 48 | *********************************************************************************************************************************/
|
---|
[53695] | 49 | //#if !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2)
|
---|
| 50 | //# define HAVE_RTMEMALLOCEX_FEATURES
|
---|
| 51 | //#endif
|
---|
[53667] | 52 |
|
---|
[53684] | 53 |
|
---|
[57358] | 54 | /*********************************************************************************************************************************
|
---|
| 55 | * Structures and Typedefs *
|
---|
| 56 | *********************************************************************************************************************************/
|
---|
[53666] | 57 |
|
---|
[53667] | 58 | /** Caller indicator. */
|
---|
| 59 | typedef enum VBOXDTCALLER
|
---|
| 60 | {
|
---|
| 61 | kVBoxDtCaller_Invalid = 0,
|
---|
| 62 | kVBoxDtCaller_Generic,
|
---|
| 63 | kVBoxDtCaller_ProbeFireUser,
|
---|
| 64 | kVBoxDtCaller_ProbeFireKernel
|
---|
| 65 | } VBOXDTCALLER;
|
---|
| 66 |
|
---|
| 67 | /**
|
---|
| 68 | * Stack data used for thread structure and such.
|
---|
| 69 | *
|
---|
| 70 | * This is planted in every external entry point and used to emulate solaris
|
---|
| 71 | * curthread, CRED, curproc and similar. It is also used to get at the
|
---|
| 72 | * uncached probe arguments.
|
---|
| 73 | */
|
---|
| 74 | typedef struct VBoxDtStackData
|
---|
| 75 | {
|
---|
| 76 | /** Eyecatcher no. 1 (VBDT_STACK_DATA_MAGIC2). */
|
---|
| 77 | uint32_t u32Magic1;
|
---|
| 78 | /** Eyecatcher no. 2 (VBDT_STACK_DATA_MAGIC2). */
|
---|
| 79 | uint32_t u32Magic2;
|
---|
| 80 | /** The format of the caller specific data. */
|
---|
| 81 | VBOXDTCALLER enmCaller;
|
---|
| 82 | /** Caller specific data. */
|
---|
| 83 | union
|
---|
| 84 | {
|
---|
| 85 | /** kVBoxDtCaller_ProbeFireKernel. */
|
---|
| 86 | struct
|
---|
| 87 | {
|
---|
| 88 | /** The caller. */
|
---|
| 89 | uintptr_t uCaller;
|
---|
| 90 | /** Pointer to the stack arguments of a probe function call. */
|
---|
| 91 | uintptr_t *pauStackArgs;
|
---|
| 92 | } ProbeFireKernel;
|
---|
| 93 | /** kVBoxDtCaller_ProbeFireUser. */
|
---|
| 94 | struct
|
---|
| 95 | {
|
---|
| 96 | /** The user context. */
|
---|
| 97 | PCSUPDRVTRACERUSRCTX pCtx;
|
---|
[53708] | 98 | /** The argument displacement caused by 64-bit arguments passed directly to
|
---|
| 99 | * dtrace_probe. */
|
---|
| 100 | int offArg;
|
---|
[53667] | 101 | } ProbeFireUser;
|
---|
| 102 | } u;
|
---|
| 103 | /** Credentials allocated by VBoxDtGetCurrentCreds. */
|
---|
| 104 | struct VBoxDtCred *pCred;
|
---|
[53669] | 105 | /** Thread structure currently being held by this thread. */
|
---|
| 106 | struct VBoxDtThread *pThread;
|
---|
[53667] | 107 | /** Pointer to this structure.
|
---|
| 108 | * This is the final bit of integrity checking. */
|
---|
| 109 | struct VBoxDtStackData *pSelf;
|
---|
| 110 | } VBDTSTACKDATA;
|
---|
| 111 | /** Pointer to the on-stack thread specific data. */
|
---|
| 112 | typedef VBDTSTACKDATA *PVBDTSTACKDATA;
|
---|
| 113 |
|
---|
| 114 | /** The first magic value. */
|
---|
| 115 | #define VBDT_STACK_DATA_MAGIC1 RT_MAKE_U32_FROM_U8('V', 'B', 'o', 'x')
|
---|
| 116 | /** The second magic value. */
|
---|
| 117 | #define VBDT_STACK_DATA_MAGIC2 RT_MAKE_U32_FROM_U8('D', 'T', 'r', 'c')
|
---|
| 118 |
|
---|
| 119 | /** The alignment of the stack data.
|
---|
| 120 | * The data doesn't require more than sizeof(uintptr_t) alignment, but the
|
---|
| 121 | * greater alignment the quicker lookup. */
|
---|
| 122 | #define VBDT_STACK_DATA_ALIGN 32
|
---|
| 123 |
|
---|
| 124 | /** Plants the stack data. */
|
---|
| 125 | #define VBDT_SETUP_STACK_DATA(a_enmCaller) \
|
---|
[53700] | 126 | uint8_t abBlob[sizeof(VBDTSTACKDATA) + VBDT_STACK_DATA_ALIGN - 1]; \
|
---|
| 127 | PVBDTSTACKDATA pStackData = (PVBDTSTACKDATA)( (uintptr_t)&abBlob[VBDT_STACK_DATA_ALIGN - 1] \
|
---|
| 128 | & ~(uintptr_t)(VBDT_STACK_DATA_ALIGN - 1)); \
|
---|
[53667] | 129 | pStackData->u32Magic1 = VBDT_STACK_DATA_MAGIC1; \
|
---|
| 130 | pStackData->u32Magic2 = VBDT_STACK_DATA_MAGIC2; \
|
---|
| 131 | pStackData->enmCaller = a_enmCaller; \
|
---|
| 132 | pStackData->pCred = NULL; \
|
---|
[53670] | 133 | pStackData->pThread = NULL; \
|
---|
[53667] | 134 | pStackData->pSelf = pStackData
|
---|
| 135 |
|
---|
| 136 | /** Passifies the stack data and frees up resource held within it. */
|
---|
| 137 | #define VBDT_CLEAR_STACK_DATA() \
|
---|
| 138 | do \
|
---|
| 139 | { \
|
---|
| 140 | pStackData->u32Magic1 = 0; \
|
---|
| 141 | pStackData->u32Magic2 = 0; \
|
---|
| 142 | pStackData->pSelf = NULL; \
|
---|
| 143 | if (pStackData->pCred) \
|
---|
| 144 | crfree(pStackData->pCred); \
|
---|
[53669] | 145 | if (pStackData->pThread) \
|
---|
| 146 | VBoxDtReleaseThread(pStackData->pThread); \
|
---|
[53667] | 147 | } while (0)
|
---|
| 148 |
|
---|
| 149 |
|
---|
[53708] | 150 | /** Simple SUPR0Printf-style logging. */
|
---|
| 151 | #if 0 /*def DEBUG_bird*/
|
---|
| 152 | # define LOG_DTRACE(a) SUPR0Printf a
|
---|
| 153 | #else
|
---|
| 154 | # define LOG_DTRACE(a) do { } while (0)
|
---|
| 155 | #endif
|
---|
| 156 |
|
---|
| 157 |
|
---|
[57358] | 158 | /*********************************************************************************************************************************
|
---|
| 159 | * Global Variables *
|
---|
| 160 | *********************************************************************************************************************************/
|
---|
[53645] | 161 | /** Per CPU information */
|
---|
[53666] | 162 | cpucore_t g_aVBoxDtCpuCores[RTCPUSET_MAX_CPUS];
|
---|
[53645] | 163 | /** Dummy mutex. */
|
---|
[53666] | 164 | struct VBoxDtMutex g_DummyMtx;
|
---|
[53670] | 165 | /** Pointer to the tracer helpers provided by VBoxDrv. */
|
---|
| 166 | static PCSUPDRVTRACERHLP g_pVBoxDTraceHlp;
|
---|
[53645] | 167 |
|
---|
[53670] | 168 | dtrace_cacheid_t dtrace_predcache_id = DTRACE_CACHEIDNONE + 1;
|
---|
| 169 |
|
---|
| 170 | #if 0
|
---|
[53663] | 171 | void (*dtrace_cpu_init)(processorid_t);
|
---|
| 172 | void (*dtrace_modload)(struct modctl *);
|
---|
| 173 | void (*dtrace_modunload)(struct modctl *);
|
---|
| 174 | void (*dtrace_helpers_cleanup)(void);
|
---|
| 175 | void (*dtrace_helpers_fork)(proc_t *, proc_t *);
|
---|
| 176 | void (*dtrace_cpustart_init)(void);
|
---|
| 177 | void (*dtrace_cpustart_fini)(void);
|
---|
| 178 | void (*dtrace_cpc_fire)(uint64_t);
|
---|
| 179 | void (*dtrace_debugger_init)(void);
|
---|
| 180 | void (*dtrace_debugger_fini)(void);
|
---|
[53670] | 181 | #endif
|
---|
[53645] | 182 |
|
---|
| 183 |
|
---|
[53667] | 184 | /**
|
---|
| 185 | * Gets the stack data.
|
---|
| 186 | *
|
---|
| 187 | * @returns Pointer to the stack data. Never NULL.
|
---|
| 188 | */
|
---|
| 189 | static PVBDTSTACKDATA vboxDtGetStackData(void)
|
---|
| 190 | {
|
---|
| 191 | int volatile iDummy = 1; /* use this to get the stack address. */
|
---|
| 192 | PVBDTSTACKDATA pData = (PVBDTSTACKDATA)( ((uintptr_t)&iDummy + VBDT_STACK_DATA_ALIGN - 1)
|
---|
| 193 | & ~(uintptr_t)(VBDT_STACK_DATA_ALIGN - 1));
|
---|
| 194 | for (;;)
|
---|
| 195 | {
|
---|
| 196 | if ( pData->u32Magic1 == VBDT_STACK_DATA_MAGIC1
|
---|
| 197 | && pData->u32Magic2 == VBDT_STACK_DATA_MAGIC2
|
---|
| 198 | && pData->pSelf == pData)
|
---|
| 199 | return pData;
|
---|
| 200 | pData = (PVBDTSTACKDATA)((uintptr_t)pData + VBDT_STACK_DATA_ALIGN);
|
---|
| 201 | }
|
---|
| 202 | }
|
---|
| 203 |
|
---|
| 204 |
|
---|
[53663] | 205 | void dtrace_toxic_ranges(void (*pfnAddOne)(uintptr_t uBase, uintptr_t cbRange))
|
---|
| 206 | {
|
---|
| 207 | /** @todo ? */
|
---|
[62608] | 208 | RT_NOREF_PV(pfnAddOne);
|
---|
[53663] | 209 | }
|
---|
| 210 |
|
---|
| 211 |
|
---|
| 212 |
|
---|
[53645] | 213 | /**
|
---|
| 214 | * Dummy callback used by dtrace_sync.
|
---|
| 215 | */
|
---|
| 216 | static DECLCALLBACK(void) vboxDtSyncCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2)
|
---|
| 217 | {
|
---|
| 218 | NOREF(idCpu); NOREF(pvUser1); NOREF(pvUser2);
|
---|
| 219 | }
|
---|
| 220 |
|
---|
| 221 |
|
---|
| 222 | /**
|
---|
| 223 | * Synchronzie across all CPUs (expensive).
|
---|
| 224 | */
|
---|
| 225 | void dtrace_sync(void)
|
---|
| 226 | {
|
---|
| 227 | int rc = RTMpOnAll(vboxDtSyncCallback, NULL, NULL);
|
---|
| 228 | AssertRC(rc);
|
---|
| 229 | }
|
---|
| 230 |
|
---|
| 231 |
|
---|
| 232 | /**
|
---|
| 233 | * Fetch a 8-bit "word" from userland.
|
---|
| 234 | *
|
---|
| 235 | * @return The byte value.
|
---|
| 236 | * @param pvUserAddr The userland address.
|
---|
| 237 | */
|
---|
| 238 | uint8_t dtrace_fuword8( void *pvUserAddr)
|
---|
| 239 | {
|
---|
| 240 | uint8_t u8;
|
---|
| 241 | int rc = RTR0MemUserCopyFrom(&u8, (uintptr_t)pvUserAddr, sizeof(u8));
|
---|
| 242 | if (RT_FAILURE(rc))
|
---|
| 243 | {
|
---|
| 244 | RTCPUID iCpu = VBDT_GET_CPUID();
|
---|
| 245 | cpu_core[iCpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
|
---|
| 246 | cpu_core[iCpu].cpuc_dtrace_illval = (uintptr_t)pvUserAddr;
|
---|
| 247 | u8 = 0;
|
---|
| 248 | }
|
---|
| 249 | return u8;
|
---|
| 250 | }
|
---|
| 251 |
|
---|
| 252 |
|
---|
| 253 | /**
|
---|
| 254 | * Fetch a 16-bit word from userland.
|
---|
| 255 | *
|
---|
| 256 | * @return The word value.
|
---|
| 257 | * @param pvUserAddr The userland address.
|
---|
| 258 | */
|
---|
| 259 | uint16_t dtrace_fuword16(void *pvUserAddr)
|
---|
| 260 | {
|
---|
| 261 | uint16_t u16;
|
---|
| 262 | int rc = RTR0MemUserCopyFrom(&u16, (uintptr_t)pvUserAddr, sizeof(u16));
|
---|
| 263 | if (RT_FAILURE(rc))
|
---|
| 264 | {
|
---|
| 265 | RTCPUID iCpu = VBDT_GET_CPUID();
|
---|
| 266 | cpu_core[iCpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
|
---|
| 267 | cpu_core[iCpu].cpuc_dtrace_illval = (uintptr_t)pvUserAddr;
|
---|
| 268 | u16 = 0;
|
---|
| 269 | }
|
---|
| 270 | return u16;
|
---|
| 271 | }
|
---|
| 272 |
|
---|
| 273 |
|
---|
| 274 | /**
|
---|
| 275 | * Fetch a 32-bit word from userland.
|
---|
| 276 | *
|
---|
| 277 | * @return The dword value.
|
---|
| 278 | * @param pvUserAddr The userland address.
|
---|
| 279 | */
|
---|
| 280 | uint32_t dtrace_fuword32(void *pvUserAddr)
|
---|
| 281 | {
|
---|
| 282 | uint32_t u32;
|
---|
| 283 | int rc = RTR0MemUserCopyFrom(&u32, (uintptr_t)pvUserAddr, sizeof(u32));
|
---|
| 284 | if (RT_FAILURE(rc))
|
---|
| 285 | {
|
---|
| 286 | RTCPUID iCpu = VBDT_GET_CPUID();
|
---|
| 287 | cpu_core[iCpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
|
---|
| 288 | cpu_core[iCpu].cpuc_dtrace_illval = (uintptr_t)pvUserAddr;
|
---|
| 289 | u32 = 0;
|
---|
| 290 | }
|
---|
| 291 | return u32;
|
---|
| 292 | }
|
---|
| 293 |
|
---|
| 294 |
|
---|
| 295 | /**
|
---|
| 296 | * Fetch a 64-bit word from userland.
|
---|
| 297 | *
|
---|
| 298 | * @return The qword value.
|
---|
| 299 | * @param pvUserAddr The userland address.
|
---|
| 300 | */
|
---|
| 301 | uint64_t dtrace_fuword64(void *pvUserAddr)
|
---|
| 302 | {
|
---|
| 303 | uint64_t u64;
|
---|
| 304 | int rc = RTR0MemUserCopyFrom(&u64, (uintptr_t)pvUserAddr, sizeof(u64));
|
---|
| 305 | if (RT_FAILURE(rc))
|
---|
| 306 | {
|
---|
| 307 | RTCPUID iCpu = VBDT_GET_CPUID();
|
---|
| 308 | cpu_core[iCpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
|
---|
| 309 | cpu_core[iCpu].cpuc_dtrace_illval = (uintptr_t)pvUserAddr;
|
---|
| 310 | u64 = 0;
|
---|
| 311 | }
|
---|
| 312 | return u64;
|
---|
| 313 | }
|
---|
| 314 |
|
---|
| 315 |
|
---|
[53663] | 316 | /** copyin implementation */
|
---|
| 317 | int VBoxDtCopyIn(void const *pvUser, void *pvDst, size_t cb)
|
---|
| 318 | {
|
---|
| 319 | int rc = RTR0MemUserCopyFrom(pvDst, (uintptr_t)pvUser, cb);
|
---|
| 320 | return RT_SUCCESS(rc) ? 0 : -1;
|
---|
| 321 | }
|
---|
| 322 |
|
---|
| 323 |
|
---|
| 324 | /** copyout implementation */
|
---|
| 325 | int VBoxDtCopyOut(void const *pvSrc, void *pvUser, size_t cb)
|
---|
| 326 | {
|
---|
| 327 | int rc = RTR0MemUserCopyTo((uintptr_t)pvUser, pvSrc, cb);
|
---|
| 328 | return RT_SUCCESS(rc) ? 0 : -1;
|
---|
| 329 | }
|
---|
| 330 |
|
---|
| 331 |
|
---|
[53645] | 332 | /**
|
---|
| 333 | * Copy data from userland into the kernel.
|
---|
| 334 | *
|
---|
| 335 | * @param uUserAddr The userland address.
|
---|
| 336 | * @param uKrnlAddr The kernel buffer address.
|
---|
| 337 | * @param cb The number of bytes to copy.
|
---|
| 338 | * @param pfFlags Pointer to the relevant cpuc_dtrace_flags.
|
---|
| 339 | */
|
---|
| 340 | void dtrace_copyin( uintptr_t uUserAddr, uintptr_t uKrnlAddr, size_t cb, volatile uint16_t *pfFlags)
|
---|
| 341 | {
|
---|
| 342 | int rc = RTR0MemUserCopyFrom((void *)uKrnlAddr, uUserAddr, cb);
|
---|
| 343 | if (RT_FAILURE(rc))
|
---|
| 344 | {
|
---|
| 345 | *pfFlags |= CPU_DTRACE_BADADDR;
|
---|
| 346 | cpu_core[VBDT_GET_CPUID()].cpuc_dtrace_illval = uUserAddr;
|
---|
| 347 | }
|
---|
| 348 | }
|
---|
| 349 |
|
---|
| 350 |
|
---|
| 351 | /**
|
---|
[53712] | 352 | * Copy data from the kernel into userland.
|
---|
[53645] | 353 | *
|
---|
| 354 | * @param uKrnlAddr The kernel buffer address.
|
---|
| 355 | * @param uUserAddr The userland address.
|
---|
| 356 | * @param cb The number of bytes to copy.
|
---|
| 357 | * @param pfFlags Pointer to the relevant cpuc_dtrace_flags.
|
---|
| 358 | */
|
---|
| 359 | void dtrace_copyout( uintptr_t uKrnlAddr, uintptr_t uUserAddr, size_t cb, volatile uint16_t *pfFlags)
|
---|
| 360 | {
|
---|
| 361 | int rc = RTR0MemUserCopyTo(uUserAddr, (void const *)uKrnlAddr, cb);
|
---|
| 362 | if (RT_FAILURE(rc))
|
---|
| 363 | {
|
---|
| 364 | *pfFlags |= CPU_DTRACE_BADADDR;
|
---|
| 365 | cpu_core[VBDT_GET_CPUID()].cpuc_dtrace_illval = uUserAddr;
|
---|
| 366 | }
|
---|
| 367 | }
|
---|
| 368 |
|
---|
| 369 |
|
---|
| 370 | /**
|
---|
| 371 | * Copy a string from userland into the kernel.
|
---|
| 372 | *
|
---|
| 373 | * @param uUserAddr The userland address.
|
---|
| 374 | * @param uKrnlAddr The kernel buffer address.
|
---|
| 375 | * @param cbMax The maximum number of bytes to copy. May stop
|
---|
| 376 | * earlier if zero byte is encountered.
|
---|
| 377 | * @param pfFlags Pointer to the relevant cpuc_dtrace_flags.
|
---|
| 378 | */
|
---|
| 379 | void dtrace_copyinstr( uintptr_t uUserAddr, uintptr_t uKrnlAddr, size_t cbMax, volatile uint16_t *pfFlags)
|
---|
| 380 | {
|
---|
| 381 | if (!cbMax)
|
---|
| 382 | return;
|
---|
| 383 |
|
---|
| 384 | char *pszDst = (char *)uKrnlAddr;
|
---|
| 385 | int rc = RTR0MemUserCopyFrom(pszDst, uUserAddr, cbMax);
|
---|
| 386 | if (RT_FAILURE(rc))
|
---|
| 387 | {
|
---|
| 388 | /* Byte by byte - lazy bird! */
|
---|
| 389 | size_t off = 0;
|
---|
| 390 | while (off < cbMax)
|
---|
| 391 | {
|
---|
| 392 | rc = RTR0MemUserCopyFrom(&pszDst[off], uUserAddr + off, 1);
|
---|
| 393 | if (RT_FAILURE(rc))
|
---|
| 394 | {
|
---|
| 395 | *pfFlags |= CPU_DTRACE_BADADDR;
|
---|
| 396 | cpu_core[VBDT_GET_CPUID()].cpuc_dtrace_illval = uUserAddr;
|
---|
| 397 | pszDst[off] = '\0';
|
---|
| 398 | return;
|
---|
| 399 | }
|
---|
| 400 | if (!pszDst[off])
|
---|
| 401 | return;
|
---|
| 402 | off++;
|
---|
| 403 | }
|
---|
| 404 | }
|
---|
| 405 |
|
---|
| 406 | pszDst[cbMax - 1] = '\0';
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 |
|
---|
| 410 | /**
|
---|
| 411 | * Copy a string from the kernel and into user land.
|
---|
| 412 | *
|
---|
| 413 | * @param uKrnlAddr The kernel string address.
|
---|
| 414 | * @param uUserAddr The userland address.
|
---|
| 415 | * @param cbMax The maximum number of bytes to copy. Will stop
|
---|
| 416 | * earlier if zero byte is encountered.
|
---|
| 417 | * @param pfFlags Pointer to the relevant cpuc_dtrace_flags.
|
---|
| 418 | */
|
---|
| 419 | void dtrace_copyoutstr(uintptr_t uKrnlAddr, uintptr_t uUserAddr, size_t cbMax, volatile uint16_t *pfFlags)
|
---|
| 420 | {
|
---|
| 421 | const char *pszSrc = (const char *)uKrnlAddr;
|
---|
| 422 | size_t cbActual = RTStrNLen(pszSrc, cbMax);
|
---|
| 423 | cbActual += cbActual < cbMax;
|
---|
| 424 | dtrace_copyout(uKrnlAddr,uUserAddr, cbActual, pfFlags);
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 |
|
---|
| 428 | /**
|
---|
| 429 | * Get the caller @a cCallFrames call frames up the stack.
|
---|
| 430 | *
|
---|
| 431 | * @returns The caller's return address or ~(uintptr_t)0.
|
---|
| 432 | * @param cCallFrames The number of frames.
|
---|
| 433 | */
|
---|
| 434 | uintptr_t dtrace_caller(int cCallFrames)
|
---|
| 435 | {
|
---|
[53667] | 436 | PVBDTSTACKDATA pData = vboxDtGetStackData();
|
---|
| 437 | if (pData->enmCaller == kVBoxDtCaller_ProbeFireKernel)
|
---|
| 438 | return pData->u.ProbeFireKernel.uCaller;
|
---|
[62608] | 439 | RT_NOREF_PV(cCallFrames);
|
---|
[53667] | 440 | return ~(uintptr_t)0;
|
---|
[53645] | 441 | }
|
---|
| 442 |
|
---|
| 443 |
|
---|
| 444 | /**
|
---|
| 445 | * Get argument number @a iArg @a cCallFrames call frames up the stack.
|
---|
| 446 | *
|
---|
| 447 | * @returns The caller's return address or ~(uintptr_t)0.
|
---|
| 448 | * @param iArg The argument to get.
|
---|
| 449 | * @param cCallFrames The number of frames.
|
---|
| 450 | */
|
---|
| 451 | uint64_t dtrace_getarg(int iArg, int cCallFrames)
|
---|
| 452 | {
|
---|
[53667] | 453 | PVBDTSTACKDATA pData = vboxDtGetStackData();
|
---|
| 454 | AssertReturn(iArg >= 5, UINT64_MAX);
|
---|
| 455 |
|
---|
| 456 | if (pData->enmCaller == kVBoxDtCaller_ProbeFireKernel)
|
---|
| 457 | return pData->u.ProbeFireKernel.pauStackArgs[iArg - 5];
|
---|
[62608] | 458 | RT_NOREF_PV(cCallFrames);
|
---|
[53667] | 459 | return UINT64_MAX;
|
---|
[53645] | 460 | }
|
---|
| 461 |
|
---|
| 462 |
|
---|
| 463 | /**
|
---|
| 464 | * Produce a traceback of the kernel stack.
|
---|
| 465 | *
|
---|
| 466 | * @param paPcStack Where to return the program counters.
|
---|
| 467 | * @param cMaxFrames The maximum number of PCs to return.
|
---|
| 468 | * @param cSkipFrames The number of artificial callstack frames to
|
---|
| 469 | * skip at the top.
|
---|
| 470 | * @param pIntr Not sure what this is...
|
---|
| 471 | */
|
---|
| 472 | void dtrace_getpcstack(pc_t *paPcStack, int cMaxFrames, int cSkipFrames, uint32_t *pIntr)
|
---|
| 473 | {
|
---|
| 474 | int iFrame = 0;
|
---|
| 475 | while (iFrame < cMaxFrames)
|
---|
| 476 | {
|
---|
| 477 | paPcStack[iFrame] = NULL;
|
---|
| 478 | iFrame++;
|
---|
| 479 | }
|
---|
[62608] | 480 | RT_NOREF_PV(pIntr);
|
---|
| 481 | RT_NOREF_PV(cSkipFrames);
|
---|
[53645] | 482 | }
|
---|
| 483 |
|
---|
| 484 |
|
---|
| 485 | /**
|
---|
| 486 | * Get the number of call frames on the stack.
|
---|
| 487 | *
|
---|
| 488 | * @returns The stack depth.
|
---|
| 489 | * @param cSkipFrames The number of artificial callstack frames to
|
---|
| 490 | * skip at the top.
|
---|
| 491 | */
|
---|
| 492 | int dtrace_getstackdepth(int cSkipFrames)
|
---|
| 493 | {
|
---|
[62608] | 494 | RT_NOREF_PV(cSkipFrames);
|
---|
[53645] | 495 | return 1;
|
---|
| 496 | }
|
---|
| 497 |
|
---|
| 498 |
|
---|
| 499 | /**
|
---|
| 500 | * Produce a traceback of the userland stack.
|
---|
| 501 | *
|
---|
| 502 | * @param paPcStack Where to return the program counters.
|
---|
| 503 | * @param paFpStack Where to return the frame pointers.
|
---|
| 504 | * @param cMaxFrames The maximum number of frames to return.
|
---|
| 505 | */
|
---|
| 506 | void dtrace_getufpstack(uint64_t *paPcStack, uint64_t *paFpStack, int cMaxFrames)
|
---|
| 507 | {
|
---|
| 508 | int iFrame = 0;
|
---|
| 509 | while (iFrame < cMaxFrames)
|
---|
| 510 | {
|
---|
| 511 | paPcStack[iFrame] = 0;
|
---|
| 512 | paFpStack[iFrame] = 0;
|
---|
| 513 | iFrame++;
|
---|
| 514 | }
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 |
|
---|
| 518 | /**
|
---|
| 519 | * Produce a traceback of the userland stack.
|
---|
| 520 | *
|
---|
| 521 | * @param paPcStack Where to return the program counters.
|
---|
| 522 | * @param cMaxFrames The maximum number of frames to return.
|
---|
| 523 | */
|
---|
| 524 | void dtrace_getupcstack(uint64_t *paPcStack, int cMaxFrames)
|
---|
| 525 | {
|
---|
| 526 | int iFrame = 0;
|
---|
| 527 | while (iFrame < cMaxFrames)
|
---|
| 528 | {
|
---|
| 529 | paPcStack[iFrame] = 0;
|
---|
| 530 | iFrame++;
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 |
|
---|
| 535 | /**
|
---|
| 536 | * Computes the depth of the userland stack.
|
---|
| 537 | */
|
---|
| 538 | int dtrace_getustackdepth(void)
|
---|
| 539 | {
|
---|
| 540 | return 0;
|
---|
| 541 | }
|
---|
| 542 |
|
---|
| 543 |
|
---|
| 544 | /**
|
---|
| 545 | * Get the current IPL/IRQL.
|
---|
| 546 | *
|
---|
| 547 | * @returns Current level.
|
---|
| 548 | */
|
---|
| 549 | int dtrace_getipl(void)
|
---|
| 550 | {
|
---|
| 551 | #ifdef RT_ARCH_AMD64
|
---|
| 552 | /* CR8 is normally the same as IRQL / IPL on AMD64. */
|
---|
| 553 | return ASMGetCR8();
|
---|
| 554 | #else
|
---|
| 555 | /* Just fake it on x86. */
|
---|
| 556 | return !ASMIntAreEnabled();
|
---|
| 557 | #endif
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 |
|
---|
| 561 | /**
|
---|
| 562 | * Get current monotonic timestamp.
|
---|
| 563 | *
|
---|
| 564 | * @returns Timestamp, nano seconds.
|
---|
| 565 | */
|
---|
| 566 | hrtime_t dtrace_gethrtime(void)
|
---|
| 567 | {
|
---|
| 568 | return RTTimeNanoTS();
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 |
|
---|
| 572 | /**
|
---|
| 573 | * Get current walltime.
|
---|
| 574 | *
|
---|
| 575 | * @returns Timestamp, nano seconds.
|
---|
| 576 | */
|
---|
| 577 | hrtime_t dtrace_gethrestime(void)
|
---|
| 578 | {
|
---|
| 579 | /** @todo try get better resolution here somehow ... */
|
---|
| 580 | RTTIMESPEC Now;
|
---|
| 581 | return RTTimeSpecGetNano(RTTimeNow(&Now));
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 |
|
---|
| 585 | /**
|
---|
| 586 | * DTrace panic routine.
|
---|
| 587 | *
|
---|
| 588 | * @param pszFormat Panic message.
|
---|
| 589 | * @param va Arguments to the panic message.
|
---|
| 590 | */
|
---|
| 591 | void dtrace_vpanic(const char *pszFormat, va_list va)
|
---|
| 592 | {
|
---|
| 593 | RTAssertMsg1(NULL, __LINE__, __FILE__, __FUNCTION__);
|
---|
| 594 | RTAssertMsg2WeakV(pszFormat, va);
|
---|
| 595 | RTR0AssertPanicSystem();
|
---|
| 596 | for (;;)
|
---|
| 597 | {
|
---|
| 598 | ASMBreakpoint();
|
---|
| 599 | volatile char *pchCrash = (volatile char *)~(uintptr_t)0;
|
---|
| 600 | *pchCrash = '\0';
|
---|
| 601 | }
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 |
|
---|
| 605 | /**
|
---|
| 606 | * DTrace panic routine.
|
---|
| 607 | *
|
---|
| 608 | * @param pszFormat Panic message.
|
---|
| 609 | * @param ... Arguments to the panic message.
|
---|
| 610 | */
|
---|
| 611 | void VBoxDtPanic(const char *pszFormat, ...)
|
---|
| 612 | {
|
---|
| 613 | va_list va;
|
---|
| 614 | va_start(va, pszFormat);
|
---|
| 615 | dtrace_vpanic(pszFormat, va);
|
---|
[62438] | 616 | /*va_end(va); - unreachable */
|
---|
[53645] | 617 | }
|
---|
| 618 |
|
---|
| 619 |
|
---|
| 620 | /**
|
---|
| 621 | * DTrace kernel message routine.
|
---|
| 622 | *
|
---|
| 623 | * @param pszFormat Kernel message.
|
---|
| 624 | * @param ... Arguments to the panic message.
|
---|
| 625 | */
|
---|
| 626 | void VBoxDtCmnErr(int iLevel, const char *pszFormat, ...)
|
---|
| 627 | {
|
---|
| 628 | va_list va;
|
---|
| 629 | va_start(va, pszFormat);
|
---|
| 630 | SUPR0Printf("%N", pszFormat, va);
|
---|
| 631 | va_end(va);
|
---|
[62608] | 632 | RT_NOREF_PV(iLevel);
|
---|
[53645] | 633 | }
|
---|
| 634 |
|
---|
[53663] | 635 |
|
---|
| 636 | /** uprintf implementation */
|
---|
| 637 | void VBoxDtUPrintf(const char *pszFormat, ...)
|
---|
| 638 | {
|
---|
| 639 | va_list va;
|
---|
| 640 | va_start(va, pszFormat);
|
---|
| 641 | VBoxDtUPrintfV(pszFormat, va);
|
---|
| 642 | va_end(va);
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 |
|
---|
| 646 | /** vuprintf implementation */
|
---|
| 647 | void VBoxDtUPrintfV(const char *pszFormat, va_list va)
|
---|
| 648 | {
|
---|
| 649 | SUPR0Printf("%N", pszFormat, va);
|
---|
| 650 | }
|
---|
| 651 |
|
---|
| 652 |
|
---|
| 653 | /* CRED implementation. */
|
---|
| 654 | cred_t *VBoxDtGetCurrentCreds(void)
|
---|
| 655 | {
|
---|
[53667] | 656 | PVBDTSTACKDATA pData = vboxDtGetStackData();
|
---|
| 657 | if (!pData->pCred)
|
---|
| 658 | {
|
---|
| 659 | struct VBoxDtCred *pCred;
|
---|
[53684] | 660 | #ifdef HAVE_RTMEMALLOCEX_FEATURES
|
---|
[53667] | 661 | int rc = RTMemAllocEx(sizeof(*pCred), 0, RTMEMALLOCEX_FLAGS_ANY_CTX, (void **)&pCred);
|
---|
[53684] | 662 | #else
|
---|
| 663 | int rc = RTMemAllocEx(sizeof(*pCred), 0, 0, (void **)&pCred);
|
---|
| 664 | #endif
|
---|
[53667] | 665 | AssertFatalRC(rc);
|
---|
| 666 | pCred->cr_refs = 1;
|
---|
| 667 | /** @todo get the right creds on unix systems. */
|
---|
| 668 | pCred->cr_uid = 0;
|
---|
| 669 | pCred->cr_ruid = 0;
|
---|
| 670 | pCred->cr_suid = 0;
|
---|
| 671 | pCred->cr_gid = 0;
|
---|
| 672 | pCred->cr_rgid = 0;
|
---|
| 673 | pCred->cr_sgid = 0;
|
---|
| 674 | pCred->cr_zone = 0;
|
---|
| 675 | pData->pCred = pCred;
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 | return pData->pCred;
|
---|
[53663] | 679 | }
|
---|
| 680 |
|
---|
| 681 |
|
---|
| 682 | /* crhold implementation */
|
---|
| 683 | void VBoxDtCredHold(struct VBoxDtCred *pCred)
|
---|
| 684 | {
|
---|
| 685 | int32_t cRefs = ASMAtomicIncS32(&pCred->cr_refs);
|
---|
[62438] | 686 | Assert(cRefs > 1); NOREF(cRefs);
|
---|
[53663] | 687 | }
|
---|
| 688 |
|
---|
| 689 |
|
---|
| 690 | /* crfree implementation */
|
---|
| 691 | void VBoxDtCredFree(struct VBoxDtCred *pCred)
|
---|
| 692 | {
|
---|
| 693 | int32_t cRefs = ASMAtomicDecS32(&pCred->cr_refs);
|
---|
| 694 | Assert(cRefs >= 0);
|
---|
| 695 | if (!cRefs)
|
---|
[53685] | 696 | RTMemFreeEx(pCred, sizeof(*pCred));
|
---|
[53663] | 697 | }
|
---|
| 698 |
|
---|
[53669] | 699 | /** Spinlock protecting the thread structures. */
|
---|
| 700 | static RTSPINLOCK g_hThreadSpinlock = NIL_RTSPINLOCK;
|
---|
| 701 | /** List of threads by usage age. */
|
---|
| 702 | static RTLISTANCHOR g_ThreadAgeList;
|
---|
| 703 | /** Hash table for looking up thread structures. */
|
---|
| 704 | static struct VBoxDtThread *g_apThreadsHash[16384];
|
---|
| 705 | /** Fake kthread_t structures.
|
---|
| 706 | * The size of this array is making horrible ASSUMPTIONS about the number of
|
---|
| 707 | * thread in the system that will be subjected to DTracing. */
|
---|
| 708 | static struct VBoxDtThread g_aThreads[8192];
|
---|
[53663] | 709 |
|
---|
[53669] | 710 |
|
---|
| 711 | static int vboxDtInitThreadDb(void)
|
---|
| 712 | {
|
---|
[53678] | 713 | int rc = RTSpinlockCreate(&g_hThreadSpinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxDtThreadDb");
|
---|
[53669] | 714 | if (RT_FAILURE(rc))
|
---|
| 715 | return rc;
|
---|
| 716 |
|
---|
| 717 | RTListInit(&g_ThreadAgeList);
|
---|
| 718 | for (uint32_t i = 0; i < RT_ELEMENTS(g_aThreads); i++)
|
---|
| 719 | {
|
---|
| 720 | g_aThreads[i].hNative = NIL_RTNATIVETHREAD;
|
---|
| 721 | g_aThreads[i].uPid = NIL_RTPROCESS;
|
---|
| 722 | RTListPrepend(&g_ThreadAgeList, &g_aThreads[i].AgeEntry);
|
---|
| 723 | }
|
---|
| 724 |
|
---|
| 725 | return VINF_SUCCESS;
|
---|
| 726 | }
|
---|
| 727 |
|
---|
| 728 |
|
---|
| 729 | static void vboxDtTermThreadDb(void)
|
---|
| 730 | {
|
---|
| 731 | RTSpinlockDestroy(g_hThreadSpinlock);
|
---|
| 732 | g_hThreadSpinlock = NIL_RTSPINLOCK;
|
---|
| 733 | RTListInit(&g_ThreadAgeList);
|
---|
| 734 | }
|
---|
| 735 |
|
---|
| 736 |
|
---|
| 737 | /* curthread implementation, providing a fake kthread_t. */
|
---|
| 738 | struct VBoxDtThread *VBoxDtGetCurrentThread(void)
|
---|
| 739 | {
|
---|
| 740 | /*
|
---|
| 741 | * Once we've retrieved a thread, we hold on to it until the thread exits
|
---|
| 742 | * the VBoxDTrace module.
|
---|
| 743 | */
|
---|
| 744 | PVBDTSTACKDATA pData = vboxDtGetStackData();
|
---|
| 745 | if (pData->pThread)
|
---|
| 746 | {
|
---|
| 747 | AssertPtr(pData->pThread);
|
---|
| 748 | Assert(pData->pThread->hNative == RTThreadNativeSelf());
|
---|
| 749 | Assert(pData->pThread->uPid == RTProcSelf());
|
---|
| 750 | Assert(RTListIsEmpty(&pData->pThread->AgeEntry));
|
---|
| 751 | return pData->pThread;
|
---|
| 752 | }
|
---|
| 753 |
|
---|
| 754 | /*
|
---|
| 755 | * Lookup the thread in the hash table.
|
---|
| 756 | */
|
---|
| 757 | RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf();
|
---|
| 758 | RTPROCESS uPid = RTProcSelf();
|
---|
[53994] | 759 | uintptr_t iHash = (hNativeSelf * 2654435761U) % RT_ELEMENTS(g_apThreadsHash);
|
---|
[53669] | 760 |
|
---|
[53678] | 761 | RTSpinlockAcquire(g_hThreadSpinlock);
|
---|
[53669] | 762 |
|
---|
| 763 | struct VBoxDtThread *pThread = g_apThreadsHash[iHash];
|
---|
| 764 | while (pThread)
|
---|
| 765 | {
|
---|
| 766 | if (pThread->hNative == hNativeSelf)
|
---|
| 767 | {
|
---|
| 768 | if (pThread->uPid != uPid)
|
---|
| 769 | {
|
---|
| 770 | /* Re-initialize the reused thread. */
|
---|
| 771 | pThread->uPid = uPid;
|
---|
| 772 | pThread->t_dtrace_vtime = 0;
|
---|
| 773 | pThread->t_dtrace_start = 0;
|
---|
| 774 | pThread->t_dtrace_stop = 0;
|
---|
| 775 | pThread->t_dtrace_scrpc = 0;
|
---|
| 776 | pThread->t_dtrace_astpc = 0;
|
---|
| 777 | pThread->t_predcache = 0;
|
---|
| 778 | }
|
---|
| 779 |
|
---|
| 780 | /* Hold the thread in the on-stack data, making sure it does not
|
---|
| 781 | get reused till the thread leaves VBoxDTrace. */
|
---|
| 782 | RTListNodeRemove(&pThread->AgeEntry);
|
---|
| 783 | pData->pThread = pThread;
|
---|
| 784 |
|
---|
[53715] | 785 | RTSpinlockRelease(g_hThreadSpinlock);
|
---|
[53669] | 786 | return pThread;
|
---|
| 787 | }
|
---|
| 788 |
|
---|
| 789 | pThread = pThread->pNext;
|
---|
| 790 | }
|
---|
| 791 |
|
---|
| 792 | /*
|
---|
| 793 | * Unknown thread. Allocate a new entry, recycling unused or old ones.
|
---|
| 794 | */
|
---|
| 795 | pThread = RTListGetLast(&g_ThreadAgeList, struct VBoxDtThread, AgeEntry);
|
---|
| 796 | AssertFatal(pThread);
|
---|
| 797 | RTListNodeRemove(&pThread->AgeEntry);
|
---|
| 798 | if (pThread->hNative != NIL_RTNATIVETHREAD)
|
---|
| 799 | {
|
---|
[53994] | 800 | uintptr_t iHash2 = (pThread->hNative * 2654435761U) % RT_ELEMENTS(g_apThreadsHash);
|
---|
[53669] | 801 | if (g_apThreadsHash[iHash2] == pThread)
|
---|
| 802 | g_apThreadsHash[iHash2] = pThread->pNext;
|
---|
| 803 | else
|
---|
| 804 | {
|
---|
| 805 | for (struct VBoxDtThread *pPrev = g_apThreadsHash[iHash2]; ; pPrev = pPrev->pNext)
|
---|
| 806 | {
|
---|
| 807 | AssertPtr(pPrev);
|
---|
| 808 | if (pPrev->pNext == pThread)
|
---|
| 809 | {
|
---|
| 810 | pPrev->pNext = pThread->pNext;
|
---|
| 811 | break;
|
---|
| 812 | }
|
---|
| 813 | }
|
---|
| 814 | }
|
---|
| 815 | }
|
---|
| 816 |
|
---|
| 817 | /*
|
---|
| 818 | * Initialize the data.
|
---|
| 819 | */
|
---|
| 820 | pThread->t_dtrace_vtime = 0;
|
---|
| 821 | pThread->t_dtrace_start = 0;
|
---|
| 822 | pThread->t_dtrace_stop = 0;
|
---|
| 823 | pThread->t_dtrace_scrpc = 0;
|
---|
| 824 | pThread->t_dtrace_astpc = 0;
|
---|
| 825 | pThread->t_predcache = 0;
|
---|
| 826 | pThread->hNative = hNativeSelf;
|
---|
| 827 | pThread->uPid = uPid;
|
---|
| 828 |
|
---|
| 829 | /*
|
---|
| 830 | * Add it to the hash as well as the on-stack data.
|
---|
| 831 | */
|
---|
| 832 | pThread->pNext = g_apThreadsHash[iHash];
|
---|
| 833 | g_apThreadsHash[iHash] = pThread->pNext;
|
---|
| 834 |
|
---|
| 835 | pData->pThread = pThread;
|
---|
| 836 |
|
---|
[53715] | 837 | RTSpinlockRelease(g_hThreadSpinlock);
|
---|
[53669] | 838 | return pThread;
|
---|
| 839 | }
|
---|
| 840 |
|
---|
| 841 |
|
---|
| 842 | /**
|
---|
| 843 | * Called by the stack data destructor.
|
---|
| 844 | *
|
---|
| 845 | * @param pThread The thread to release.
|
---|
| 846 | *
|
---|
| 847 | */
|
---|
| 848 | static void VBoxDtReleaseThread(struct VBoxDtThread *pThread)
|
---|
| 849 | {
|
---|
[53678] | 850 | RTSpinlockAcquire(g_hThreadSpinlock);
|
---|
[53669] | 851 |
|
---|
| 852 | RTListAppend(&g_ThreadAgeList, &pThread->AgeEntry);
|
---|
| 853 |
|
---|
[53715] | 854 | RTSpinlockRelease(g_hThreadSpinlock);
|
---|
[53669] | 855 | }
|
---|
| 856 |
|
---|
| 857 |
|
---|
| 858 |
|
---|
| 859 |
|
---|
[53668] | 860 | /*
|
---|
| 861 | *
|
---|
| 862 | * Virtual Memory / Resource Allocator.
|
---|
| 863 | * Virtual Memory / Resource Allocator.
|
---|
| 864 | * Virtual Memory / Resource Allocator.
|
---|
| 865 | *
|
---|
| 866 | */
|
---|
| 867 |
|
---|
| 868 |
|
---|
[53667] | 869 | /** The number of bits per chunk.
|
---|
| 870 | * @remarks The 32 bytes are for heap headers and such like. */
|
---|
| 871 | #define VBOXDTVMEMCHUNK_BITS ( ((_64K - 32 - sizeof(uint32_t) * 2) / sizeof(uint32_t)) * 32)
|
---|
| 872 |
|
---|
| 873 | /**
|
---|
| 874 | * Resource allocator chunk.
|
---|
| 875 | */
|
---|
| 876 | typedef struct VBoxDtVMemChunk
|
---|
[53666] | 877 | {
|
---|
[53667] | 878 | /** The ordinal (unbased) of the first item. */
|
---|
| 879 | uint32_t iFirst;
|
---|
| 880 | /** The current number of free items in this chunk. */
|
---|
| 881 | uint32_t cCurFree;
|
---|
| 882 | /** The allocation bitmap. */
|
---|
| 883 | uint32_t bm[VBOXDTVMEMCHUNK_BITS / 32];
|
---|
| 884 | } VBOXDTVMEMCHUNK;
|
---|
| 885 | /** Pointer to a resource allocator chunk. */
|
---|
| 886 | typedef VBOXDTVMEMCHUNK *PVBOXDTVMEMCHUNK;
|
---|
| 887 |
|
---|
| 888 |
|
---|
| 889 |
|
---|
| 890 | /**
|
---|
| 891 | * Resource allocator instance.
|
---|
| 892 | */
|
---|
| 893 | typedef struct VBoxDtVMem
|
---|
| 894 | {
|
---|
[53715] | 895 | /** Spinlock protecting the data (interrupt safe). */
|
---|
[53667] | 896 | RTSPINLOCK hSpinlock;
|
---|
| 897 | /** Magic value. */
|
---|
| 898 | uint32_t u32Magic;
|
---|
| 899 | /** The current number of free items in the chunks. */
|
---|
| 900 | uint32_t cCurFree;
|
---|
| 901 | /** The current number of chunks that we have allocated. */
|
---|
| 902 | uint32_t cCurChunks;
|
---|
| 903 | /** The configured resource base. */
|
---|
| 904 | uint32_t uBase;
|
---|
[53675] | 905 | /** The configured max number of items. */
|
---|
| 906 | uint32_t cMaxItems;
|
---|
[53667] | 907 | /** The size of the apChunks array. */
|
---|
| 908 | uint32_t cMaxChunks;
|
---|
| 909 | /** Array of chunk pointers.
|
---|
| 910 | * (The size is determined at creation.) */
|
---|
| 911 | PVBOXDTVMEMCHUNK apChunks[1];
|
---|
| 912 | } VBOXDTVMEM;
|
---|
| 913 | /** Pointer to a resource allocator instance. */
|
---|
| 914 | typedef VBOXDTVMEM *PVBOXDTVMEM;
|
---|
| 915 |
|
---|
| 916 | /** Magic value for the VBOXDTVMEM structure. */
|
---|
| 917 | #define VBOXDTVMEM_MAGIC RT_MAKE_U32_FROM_U8('V', 'M', 'e', 'm')
|
---|
| 918 |
|
---|
| 919 |
|
---|
| 920 | /* vmem_create implementation */
|
---|
| 921 | struct VBoxDtVMem *VBoxDtVMemCreate(const char *pszName, void *pvBase, size_t cb, size_t cbUnit,
|
---|
| 922 | PFNRT pfnAlloc, PFNRT pfnFree, struct VBoxDtVMem *pSrc,
|
---|
| 923 | size_t cbQCacheMax, uint32_t fFlags)
|
---|
| 924 | {
|
---|
| 925 | /*
|
---|
| 926 | * Assert preconditions of this implementation.
|
---|
| 927 | */
|
---|
| 928 | AssertMsgReturn((uintptr_t)pvBase <= UINT32_MAX, ("%p\n", pvBase), NULL);
|
---|
[53675] | 929 | AssertMsgReturn(cb <= UINT32_MAX, ("%zu\n", cb), NULL);
|
---|
[53667] | 930 | AssertMsgReturn((uintptr_t)pvBase + cb - 1 <= UINT32_MAX, ("%p %zu\n", pvBase, cb), NULL);
|
---|
| 931 | AssertMsgReturn(cbUnit == 1, ("%zu\n", cbUnit), NULL);
|
---|
| 932 | AssertReturn(!pfnAlloc, NULL);
|
---|
| 933 | AssertReturn(!pfnFree, NULL);
|
---|
| 934 | AssertReturn(!pSrc, NULL);
|
---|
| 935 | AssertReturn(!cbQCacheMax, NULL);
|
---|
| 936 | AssertReturn(fFlags & VM_SLEEP, NULL);
|
---|
| 937 | AssertReturn(fFlags & VMC_IDENTIFIER, NULL);
|
---|
[62608] | 938 | RT_NOREF_PV(pszName);
|
---|
[53667] | 939 |
|
---|
| 940 | /*
|
---|
| 941 | * Allocate the instance.
|
---|
| 942 | */
|
---|
[53682] | 943 | uint32_t cChunks = (uint32_t)cb / VBOXDTVMEMCHUNK_BITS;
|
---|
[53675] | 944 | if (cb % VBOXDTVMEMCHUNK_BITS)
|
---|
| 945 | cChunks++;
|
---|
[73097] | 946 | PVBOXDTVMEM pThis = (PVBOXDTVMEM)RTMemAllocZ(RT_UOFFSETOF_DYN(VBOXDTVMEM, apChunks[cChunks]));
|
---|
[53667] | 947 | if (!pThis)
|
---|
| 948 | return NULL;
|
---|
[53678] | 949 | int rc = RTSpinlockCreate(&pThis->hSpinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxDtVMem");
|
---|
[53667] | 950 | if (RT_FAILURE(rc))
|
---|
| 951 | {
|
---|
| 952 | RTMemFree(pThis);
|
---|
| 953 | return NULL;
|
---|
| 954 | }
|
---|
| 955 | pThis->u32Magic = VBOXDTVMEM_MAGIC;
|
---|
| 956 | pThis->cCurFree = 0;
|
---|
| 957 | pThis->cCurChunks = 0;
|
---|
| 958 | pThis->uBase = (uint32_t)(uintptr_t)pvBase;
|
---|
[53675] | 959 | pThis->cMaxItems = (uint32_t)cb;
|
---|
[53667] | 960 | pThis->cMaxChunks = cChunks;
|
---|
| 961 |
|
---|
| 962 | return pThis;
|
---|
[53666] | 963 | }
|
---|
| 964 |
|
---|
[53667] | 965 |
|
---|
| 966 | /* vmem_destroy implementation */
|
---|
| 967 | void VBoxDtVMemDestroy(struct VBoxDtVMem *pThis)
|
---|
[53666] | 968 | {
|
---|
[53667] | 969 | if (!pThis)
|
---|
| 970 | return;
|
---|
| 971 | AssertPtrReturnVoid(pThis);
|
---|
| 972 | AssertReturnVoid(pThis->u32Magic == VBOXDTVMEM_MAGIC);
|
---|
| 973 |
|
---|
| 974 | /*
|
---|
| 975 | * Invalidate the instance.
|
---|
| 976 | */
|
---|
[53678] | 977 | RTSpinlockAcquire(pThis->hSpinlock); /* paranoia */
|
---|
[53667] | 978 | pThis->u32Magic = 0;
|
---|
[53678] | 979 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53667] | 980 | RTSpinlockDestroy(pThis->hSpinlock);
|
---|
| 981 |
|
---|
| 982 | /*
|
---|
| 983 | * Free the chunks, then the instance.
|
---|
| 984 | */
|
---|
| 985 | uint32_t iChunk = pThis->cCurChunks;
|
---|
| 986 | while (iChunk-- > 0)
|
---|
| 987 | {
|
---|
| 988 | RTMemFree(pThis->apChunks[iChunk]);
|
---|
| 989 | pThis->apChunks[iChunk] = NULL;
|
---|
| 990 | }
|
---|
| 991 | RTMemFree(pThis);
|
---|
[53666] | 992 | }
|
---|
| 993 |
|
---|
| 994 |
|
---|
[53667] | 995 | /* vmem_alloc implementation */
|
---|
| 996 | void *VBoxDtVMemAlloc(struct VBoxDtVMem *pThis, size_t cbMem, uint32_t fFlags)
|
---|
| 997 | {
|
---|
| 998 | /*
|
---|
| 999 | * Validate input.
|
---|
| 1000 | */
|
---|
| 1001 | AssertReturn(fFlags & VM_BESTFIT, NULL);
|
---|
| 1002 | AssertReturn(fFlags & VM_SLEEP, NULL);
|
---|
| 1003 | AssertReturn(cbMem == 1, NULL);
|
---|
| 1004 | AssertPtrReturn(pThis, NULL);
|
---|
| 1005 | AssertReturn(pThis->u32Magic == VBOXDTVMEM_MAGIC, NULL);
|
---|
[53666] | 1006 |
|
---|
[53667] | 1007 | /*
|
---|
| 1008 | * Allocation loop.
|
---|
| 1009 | */
|
---|
[53678] | 1010 | RTSpinlockAcquire(pThis->hSpinlock);
|
---|
[53667] | 1011 | for (;;)
|
---|
| 1012 | {
|
---|
| 1013 | PVBOXDTVMEMCHUNK pChunk;
|
---|
| 1014 | uint32_t const cChunks = pThis->cCurChunks;
|
---|
[53666] | 1015 |
|
---|
[53667] | 1016 | if (RT_LIKELY(pThis->cCurFree > 0))
|
---|
| 1017 | {
|
---|
| 1018 | for (uint32_t iChunk = 0; iChunk < cChunks; iChunk++)
|
---|
| 1019 | {
|
---|
| 1020 | pChunk = pThis->apChunks[iChunk];
|
---|
| 1021 | if (pChunk->cCurFree > 0)
|
---|
| 1022 | {
|
---|
| 1023 | int iBit = ASMBitFirstClear(pChunk->bm, VBOXDTVMEMCHUNK_BITS);
|
---|
| 1024 | AssertMsgReturnStmt(iBit >= 0 && (unsigned)iBit < VBOXDTVMEMCHUNK_BITS, ("%d\n", iBit),
|
---|
[53678] | 1025 | RTSpinlockRelease(pThis->hSpinlock),
|
---|
[53667] | 1026 | NULL);
|
---|
[53666] | 1027 |
|
---|
[53667] | 1028 | ASMBitSet(pChunk->bm, iBit);
|
---|
| 1029 | pChunk->cCurFree--;
|
---|
| 1030 | pThis->cCurFree--;
|
---|
[53645] | 1031 |
|
---|
[53667] | 1032 | uint32_t iRet = (uint32_t)iBit + pChunk->iFirst + pThis->uBase;
|
---|
[53715] | 1033 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53667] | 1034 | return (void *)(uintptr_t)iRet;
|
---|
| 1035 | }
|
---|
| 1036 | }
|
---|
| 1037 | AssertFailedBreak();
|
---|
| 1038 | }
|
---|
[53663] | 1039 |
|
---|
[53667] | 1040 | /* Out of resources? */
|
---|
| 1041 | if (cChunks >= pThis->cMaxChunks)
|
---|
| 1042 | break;
|
---|
[53663] | 1043 |
|
---|
[53667] | 1044 | /*
|
---|
| 1045 | * Allocate another chunk.
|
---|
| 1046 | */
|
---|
| 1047 | uint32_t const iFirstBit = cChunks > 0 ? pThis->apChunks[cChunks - 1]->iFirst + VBOXDTVMEMCHUNK_BITS : 0;
|
---|
| 1048 | uint32_t const cFreeBits = cChunks + 1 == pThis->cMaxChunks
|
---|
[53675] | 1049 | ? pThis->cMaxItems - (iFirstBit - pThis->uBase)
|
---|
[53667] | 1050 | : VBOXDTVMEMCHUNK_BITS;
|
---|
| 1051 | Assert(cFreeBits <= VBOXDTVMEMCHUNK_BITS);
|
---|
[53663] | 1052 |
|
---|
[53678] | 1053 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53666] | 1054 |
|
---|
[53667] | 1055 | pChunk = (PVBOXDTVMEMCHUNK)RTMemAllocZ(sizeof(*pChunk));
|
---|
| 1056 | if (!pChunk)
|
---|
| 1057 | return NULL;
|
---|
[53666] | 1058 |
|
---|
[53667] | 1059 | pChunk->iFirst = iFirstBit;
|
---|
| 1060 | pChunk->cCurFree = cFreeBits;
|
---|
| 1061 | if (cFreeBits != VBOXDTVMEMCHUNK_BITS)
|
---|
| 1062 | {
|
---|
| 1063 | /* lazy bird. */
|
---|
| 1064 | uint32_t iBit = cFreeBits;
|
---|
| 1065 | while (iBit < VBOXDTVMEMCHUNK_BITS)
|
---|
| 1066 | {
|
---|
| 1067 | ASMBitSet(pChunk->bm, iBit);
|
---|
| 1068 | iBit++;
|
---|
| 1069 | }
|
---|
| 1070 | }
|
---|
[53666] | 1071 |
|
---|
[53678] | 1072 | RTSpinlockAcquire(pThis->hSpinlock);
|
---|
[53666] | 1073 |
|
---|
[53667] | 1074 | /*
|
---|
| 1075 | * Insert the new chunk. If someone raced us here, we'll drop it to
|
---|
| 1076 | * avoid wasting resources.
|
---|
| 1077 | */
|
---|
| 1078 | if (pThis->cCurChunks == cChunks)
|
---|
| 1079 | {
|
---|
| 1080 | pThis->apChunks[cChunks] = pChunk;
|
---|
| 1081 | pThis->cCurFree += pChunk->cCurFree;
|
---|
| 1082 | pThis->cCurChunks += 1;
|
---|
| 1083 | }
|
---|
| 1084 | else
|
---|
| 1085 | {
|
---|
[53678] | 1086 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53667] | 1087 | RTMemFree(pChunk);
|
---|
[53678] | 1088 | RTSpinlockAcquire(pThis->hSpinlock);
|
---|
[53667] | 1089 | }
|
---|
| 1090 | }
|
---|
[53715] | 1091 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53667] | 1092 |
|
---|
| 1093 | return NULL;
|
---|
| 1094 | }
|
---|
| 1095 |
|
---|
| 1096 | /* vmem_free implementation */
|
---|
| 1097 | void VBoxDtVMemFree(struct VBoxDtVMem *pThis, void *pvMem, size_t cbMem)
|
---|
[53666] | 1098 | {
|
---|
| 1099 | /*
|
---|
[53667] | 1100 | * Validate input.
|
---|
[53666] | 1101 | */
|
---|
[53667] | 1102 | AssertReturnVoid(cbMem == 1);
|
---|
| 1103 | AssertPtrReturnVoid(pThis);
|
---|
| 1104 | AssertReturnVoid(pThis->u32Magic == VBOXDTVMEM_MAGIC);
|
---|
| 1105 |
|
---|
| 1106 | AssertReturnVoid((uintptr_t)pvMem < UINT32_MAX);
|
---|
| 1107 | uint32_t uMem = (uint32_t)(uintptr_t)pvMem;
|
---|
| 1108 | AssertReturnVoid(uMem >= pThis->uBase);
|
---|
| 1109 | uMem -= pThis->uBase;
|
---|
[53675] | 1110 | AssertReturnVoid(uMem < pThis->cMaxItems);
|
---|
[53667] | 1111 |
|
---|
[53675] | 1112 |
|
---|
[53667] | 1113 | /*
|
---|
| 1114 | * Free it.
|
---|
| 1115 | */
|
---|
[53678] | 1116 | RTSpinlockAcquire(pThis->hSpinlock);
|
---|
[53667] | 1117 | uint32_t const iChunk = uMem / VBOXDTVMEMCHUNK_BITS;
|
---|
| 1118 | if (iChunk < pThis->cCurChunks)
|
---|
[53666] | 1119 | {
|
---|
[53667] | 1120 | PVBOXDTVMEMCHUNK pChunk = pThis->apChunks[iChunk];
|
---|
| 1121 | uint32_t iBit = uMem - pChunk->iFirst;
|
---|
[53678] | 1122 | AssertReturnVoidStmt(iBit < VBOXDTVMEMCHUNK_BITS, RTSpinlockRelease(pThis->hSpinlock));
|
---|
| 1123 | AssertReturnVoidStmt(ASMBitTestAndClear(pChunk->bm, iBit), RTSpinlockRelease(pThis->hSpinlock));
|
---|
[53666] | 1124 |
|
---|
[53667] | 1125 | pChunk->cCurFree++;
|
---|
| 1126 | pThis->cCurFree++;
|
---|
[53666] | 1127 | }
|
---|
| 1128 |
|
---|
[53678] | 1129 | RTSpinlockRelease(pThis->hSpinlock);
|
---|
[53666] | 1130 | }
|
---|
[53667] | 1131 |
|
---|
| 1132 |
|
---|
[53668] | 1133 | /*
|
---|
| 1134 | *
|
---|
| 1135 | * Memory Allocators.
|
---|
| 1136 | * Memory Allocators.
|
---|
| 1137 | * Memory Allocators.
|
---|
| 1138 | *
|
---|
| 1139 | */
|
---|
[53667] | 1140 |
|
---|
| 1141 |
|
---|
[53668] | 1142 | /* kmem_alloc implementation */
|
---|
| 1143 | void *VBoxDtKMemAlloc(size_t cbMem, uint32_t fFlags)
|
---|
| 1144 | {
|
---|
[53684] | 1145 | void *pvMem;
|
---|
| 1146 | #ifdef HAVE_RTMEMALLOCEX_FEATURES
|
---|
| 1147 | uint32_t fMemAllocFlags = fFlags & KM_NOSLEEP ? RTMEMALLOCEX_FLAGS_ANY_CTX : 0;
|
---|
| 1148 | #else
|
---|
| 1149 | uint32_t fMemAllocFlags = 0;
|
---|
[62608] | 1150 | RT_NOREF_PV(fFlags);
|
---|
[53684] | 1151 | #endif
|
---|
| 1152 | int rc = RTMemAllocEx(cbMem, 0, fMemAllocFlags, &pvMem);
|
---|
[53668] | 1153 | AssertRCReturn(rc, NULL);
|
---|
| 1154 | AssertPtr(pvMem);
|
---|
| 1155 | return pvMem;
|
---|
| 1156 | }
|
---|
| 1157 |
|
---|
| 1158 |
|
---|
| 1159 | /* kmem_zalloc implementation */
|
---|
| 1160 | void *VBoxDtKMemAllocZ(size_t cbMem, uint32_t fFlags)
|
---|
| 1161 | {
|
---|
[53684] | 1162 | void *pvMem;
|
---|
| 1163 | #ifdef HAVE_RTMEMALLOCEX_FEATURES
|
---|
| 1164 | uint32_t fMemAllocFlags = (fFlags & KM_NOSLEEP ? RTMEMALLOCEX_FLAGS_ANY_CTX : 0) | RTMEMALLOCEX_FLAGS_ZEROED;
|
---|
| 1165 | #else
|
---|
| 1166 | uint32_t fMemAllocFlags = RTMEMALLOCEX_FLAGS_ZEROED;
|
---|
[62608] | 1167 | RT_NOREF_PV(fFlags);
|
---|
[53684] | 1168 | #endif
|
---|
| 1169 | int rc = RTMemAllocEx(cbMem, 0, fMemAllocFlags, &pvMem);
|
---|
[53668] | 1170 | AssertRCReturn(rc, NULL);
|
---|
| 1171 | AssertPtr(pvMem);
|
---|
| 1172 | return pvMem;
|
---|
| 1173 | }
|
---|
| 1174 |
|
---|
| 1175 |
|
---|
| 1176 | /* kmem_free implementation */
|
---|
| 1177 | void VBoxDtKMemFree(void *pvMem, size_t cbMem)
|
---|
| 1178 | {
|
---|
| 1179 | RTMemFreeEx(pvMem, cbMem);
|
---|
| 1180 | }
|
---|
| 1181 |
|
---|
| 1182 |
|
---|
| 1183 | /**
|
---|
| 1184 | * Memory cache mockup structure.
|
---|
| 1185 | * No slab allocator here!
|
---|
| 1186 | */
|
---|
| 1187 | struct VBoxDtMemCache
|
---|
| 1188 | {
|
---|
| 1189 | uint32_t u32Magic;
|
---|
| 1190 | size_t cbBuf;
|
---|
| 1191 | size_t cbAlign;
|
---|
| 1192 | };
|
---|
| 1193 |
|
---|
| 1194 |
|
---|
| 1195 | /* Limited kmem_cache_create implementation. */
|
---|
| 1196 | struct VBoxDtMemCache *VBoxDtKMemCacheCreate(const char *pszName, size_t cbBuf, size_t cbAlign,
|
---|
| 1197 | PFNRT pfnCtor, PFNRT pfnDtor, PFNRT pfnReclaim,
|
---|
| 1198 | void *pvUser, void *pvVM, uint32_t fFlags)
|
---|
| 1199 | {
|
---|
| 1200 | /*
|
---|
| 1201 | * Check the input.
|
---|
| 1202 | */
|
---|
| 1203 | AssertReturn(cbBuf > 0 && cbBuf < _1G, NULL);
|
---|
| 1204 | AssertReturn(RT_IS_POWER_OF_TWO(cbAlign), NULL);
|
---|
| 1205 | AssertReturn(!pfnCtor, NULL);
|
---|
| 1206 | AssertReturn(!pfnDtor, NULL);
|
---|
| 1207 | AssertReturn(!pfnReclaim, NULL);
|
---|
| 1208 | AssertReturn(!pvUser, NULL);
|
---|
| 1209 | AssertReturn(!pvVM, NULL);
|
---|
| 1210 | AssertReturn(!fFlags, NULL);
|
---|
[62608] | 1211 | RT_NOREF_PV(pszName);
|
---|
[53668] | 1212 |
|
---|
| 1213 | /*
|
---|
| 1214 | * Create a parameter container. Don't bother with anything fancy here yet,
|
---|
| 1215 | * just get something working.
|
---|
| 1216 | */
|
---|
| 1217 | struct VBoxDtMemCache *pThis = (struct VBoxDtMemCache *)RTMemAlloc(sizeof(*pThis));
|
---|
| 1218 | if (!pThis)
|
---|
| 1219 | return NULL;
|
---|
| 1220 |
|
---|
| 1221 | pThis->cbAlign = cbAlign;
|
---|
| 1222 | pThis->cbBuf = cbBuf;
|
---|
| 1223 | return pThis;
|
---|
| 1224 | }
|
---|
| 1225 |
|
---|
| 1226 |
|
---|
| 1227 | /* Limited kmem_cache_destroy implementation. */
|
---|
| 1228 | void VBoxDtKMemCacheDestroy(struct VBoxDtMemCache *pThis)
|
---|
| 1229 | {
|
---|
| 1230 | RTMemFree(pThis);
|
---|
| 1231 | }
|
---|
| 1232 |
|
---|
| 1233 |
|
---|
| 1234 | /* kmem_cache_alloc implementation. */
|
---|
| 1235 | void *VBoxDtKMemCacheAlloc(struct VBoxDtMemCache *pThis, uint32_t fFlags)
|
---|
| 1236 | {
|
---|
[53684] | 1237 | void *pvMem;
|
---|
| 1238 | #ifdef HAVE_RTMEMALLOCEX_FEATURES
|
---|
| 1239 | uint32_t fMemAllocFlags = (fFlags & KM_NOSLEEP ? RTMEMALLOCEX_FLAGS_ANY_CTX : 0) | RTMEMALLOCEX_FLAGS_ZEROED;
|
---|
| 1240 | #else
|
---|
| 1241 | uint32_t fMemAllocFlags = RTMEMALLOCEX_FLAGS_ZEROED;
|
---|
[62608] | 1242 | RT_NOREF_PV(fFlags);
|
---|
[53684] | 1243 | #endif
|
---|
[53688] | 1244 | int rc = RTMemAllocEx(pThis->cbBuf, /*pThis->cbAlign*/0, fMemAllocFlags, &pvMem);
|
---|
[53668] | 1245 | AssertRCReturn(rc, NULL);
|
---|
| 1246 | AssertPtr(pvMem);
|
---|
| 1247 | return pvMem;
|
---|
| 1248 | }
|
---|
| 1249 |
|
---|
| 1250 |
|
---|
| 1251 | /* kmem_cache_free implementation. */
|
---|
| 1252 | void VBoxDtKMemCacheFree(struct VBoxDtMemCache *pThis, void *pvMem)
|
---|
| 1253 | {
|
---|
| 1254 | RTMemFreeEx(pvMem, pThis->cbBuf);
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 |
|
---|
[53667] | 1258 | /*
|
---|
| 1259 | *
|
---|
[53688] | 1260 | * Mutex Semaphore Wrappers.
|
---|
[53668] | 1261 | *
|
---|
| 1262 | */
|
---|
| 1263 |
|
---|
| 1264 |
|
---|
| 1265 | /** Initializes a mutex. */
|
---|
| 1266 | int VBoxDtMutexInit(struct VBoxDtMutex *pMtx)
|
---|
| 1267 | {
|
---|
| 1268 | AssertReturn(pMtx != &g_DummyMtx, -1);
|
---|
| 1269 | AssertPtr(pMtx);
|
---|
| 1270 |
|
---|
| 1271 | pMtx->hOwner = NIL_RTNATIVETHREAD;
|
---|
| 1272 | pMtx->hMtx = NIL_RTSEMMUTEX;
|
---|
| 1273 | int rc = RTSemMutexCreate(&pMtx->hMtx);
|
---|
| 1274 | if (RT_SUCCESS(rc))
|
---|
| 1275 | return 0;
|
---|
| 1276 | return -1;
|
---|
| 1277 | }
|
---|
| 1278 |
|
---|
| 1279 |
|
---|
| 1280 | /** Deletes a mutex. */
|
---|
| 1281 | void VBoxDtMutexDelete(struct VBoxDtMutex *pMtx)
|
---|
| 1282 | {
|
---|
| 1283 | AssertReturnVoid(pMtx != &g_DummyMtx);
|
---|
| 1284 | AssertPtr(pMtx);
|
---|
[59959] | 1285 | if (pMtx->hMtx == NIL_RTSEMMUTEX)
|
---|
[53668] | 1286 | return;
|
---|
| 1287 |
|
---|
| 1288 | Assert(pMtx->hOwner == NIL_RTNATIVETHREAD);
|
---|
| 1289 | int rc = RTSemMutexDestroy(pMtx->hMtx); AssertRC(rc);
|
---|
| 1290 | pMtx->hMtx = NIL_RTSEMMUTEX;
|
---|
| 1291 | }
|
---|
| 1292 |
|
---|
| 1293 |
|
---|
| 1294 | /* mutex_enter implementation */
|
---|
| 1295 | void VBoxDtMutexEnter(struct VBoxDtMutex *pMtx)
|
---|
| 1296 | {
|
---|
| 1297 | AssertPtr(pMtx);
|
---|
| 1298 | if (pMtx == &g_DummyMtx)
|
---|
| 1299 | return;
|
---|
| 1300 |
|
---|
| 1301 | RTNATIVETHREAD hSelf = RTThreadNativeSelf();
|
---|
| 1302 |
|
---|
| 1303 | int rc = RTSemMutexRequest(pMtx->hMtx, RT_INDEFINITE_WAIT);
|
---|
| 1304 | AssertFatalRC(rc);
|
---|
| 1305 |
|
---|
| 1306 | Assert(pMtx->hOwner == NIL_RTNATIVETHREAD);
|
---|
| 1307 | pMtx->hOwner = hSelf;
|
---|
| 1308 | }
|
---|
| 1309 |
|
---|
| 1310 |
|
---|
| 1311 | /* mutex_exit implementation */
|
---|
| 1312 | void VBoxDtMutexExit(struct VBoxDtMutex *pMtx)
|
---|
| 1313 | {
|
---|
| 1314 | AssertPtr(pMtx);
|
---|
| 1315 | if (pMtx == &g_DummyMtx)
|
---|
| 1316 | return;
|
---|
| 1317 |
|
---|
| 1318 | Assert(pMtx->hOwner == RTThreadNativeSelf());
|
---|
| 1319 |
|
---|
| 1320 | pMtx->hOwner = NIL_RTNATIVETHREAD;
|
---|
| 1321 | int rc = RTSemMutexRelease(pMtx->hMtx);
|
---|
| 1322 | AssertFatalRC(rc);
|
---|
| 1323 | }
|
---|
| 1324 |
|
---|
| 1325 |
|
---|
| 1326 | /* MUTEX_HELD implementation */
|
---|
| 1327 | bool VBoxDtMutexIsOwner(struct VBoxDtMutex *pMtx)
|
---|
| 1328 | {
|
---|
| 1329 | AssertPtrReturn(pMtx, false);
|
---|
| 1330 | if (pMtx == &g_DummyMtx)
|
---|
| 1331 | return true;
|
---|
| 1332 | return pMtx->hOwner == RTThreadNativeSelf();
|
---|
| 1333 | }
|
---|
| 1334 |
|
---|
| 1335 |
|
---|
| 1336 |
|
---|
| 1337 | /*
|
---|
| 1338 | *
|
---|
[53667] | 1339 | * Helpers for handling VTG structures.
|
---|
| 1340 | * Helpers for handling VTG structures.
|
---|
| 1341 | * Helpers for handling VTG structures.
|
---|
| 1342 | *
|
---|
| 1343 | */
|
---|
| 1344 |
|
---|
| 1345 |
|
---|
| 1346 |
|
---|
| 1347 | /**
|
---|
| 1348 | * Converts an attribute from VTG description speak to DTrace.
|
---|
| 1349 | *
|
---|
| 1350 | * @param pDtAttr The DTrace attribute (dst).
|
---|
| 1351 | * @param pVtgAttr The VTG attribute descriptor (src).
|
---|
| 1352 | */
|
---|
| 1353 | static void vboxDtVtgConvAttr(dtrace_attribute_t *pDtAttr, PCVTGDESCATTR pVtgAttr)
|
---|
| 1354 | {
|
---|
| 1355 | pDtAttr->dtat_name = pVtgAttr->u8Code - 1;
|
---|
| 1356 | pDtAttr->dtat_data = pVtgAttr->u8Data - 1;
|
---|
| 1357 | pDtAttr->dtat_class = pVtgAttr->u8DataDep - 1;
|
---|
| 1358 | }
|
---|
| 1359 |
|
---|
| 1360 | /**
|
---|
| 1361 | * Gets a string from the string table.
|
---|
| 1362 | *
|
---|
| 1363 | * @returns Pointer to the string.
|
---|
| 1364 | * @param pVtgHdr The VTG object header.
|
---|
| 1365 | * @param offStrTab The string table offset.
|
---|
| 1366 | */
|
---|
[53704] | 1367 | static const char *vboxDtVtgGetString(PVTGOBJHDR pVtgHdr, uint32_t offStrTab)
|
---|
[53667] | 1368 | {
|
---|
| 1369 | Assert(offStrTab < pVtgHdr->cbStrTab);
|
---|
[53704] | 1370 | return (const char *)pVtgHdr + pVtgHdr->offStrTab + offStrTab;
|
---|
[53667] | 1371 | }
|
---|
| 1372 |
|
---|
| 1373 |
|
---|
| 1374 |
|
---|
| 1375 | /*
|
---|
| 1376 | *
|
---|
| 1377 | * DTrace Provider Interface.
|
---|
| 1378 | * DTrace Provider Interface.
|
---|
| 1379 | * DTrace Provider Interface.
|
---|
| 1380 | *
|
---|
| 1381 | */
|
---|
| 1382 |
|
---|
| 1383 |
|
---|
| 1384 | /**
|
---|
| 1385 | * @callback_method_impl{dtrace_pops_t,dtps_provide}
|
---|
| 1386 | */
|
---|
| 1387 | static void vboxDtPOps_Provide(void *pvProv, const dtrace_probedesc_t *pDtProbeDesc)
|
---|
| 1388 | {
|
---|
[53708] | 1389 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
| 1390 | AssertPtrReturnVoid(pProv);
|
---|
| 1391 | LOG_DTRACE(("%s: %p / %p pDtProbeDesc=%p\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, pDtProbeDesc));
|
---|
[53667] | 1392 |
|
---|
| 1393 | if (pDtProbeDesc)
|
---|
| 1394 | return; /* We don't generate probes, so never mind these requests. */
|
---|
| 1395 |
|
---|
| 1396 | if (pProv->TracerData.DTrace.fZombie)
|
---|
| 1397 | return;
|
---|
[53704] | 1398 |
|
---|
[53708] | 1399 | dtrace_provider_id_t const idProvider = pProv->TracerData.DTrace.idProvider;
|
---|
[53696] | 1400 | AssertPtrReturnVoid(idProvider);
|
---|
[53667] | 1401 |
|
---|
[53695] | 1402 | AssertPtrReturnVoid(pProv->pHdr);
|
---|
[53704] | 1403 | AssertReturnVoid(pProv->pHdr->offProbeLocs != 0);
|
---|
| 1404 | uint32_t const cProbeLocs = pProv->pHdr->cbProbeLocs / sizeof(VTGPROBELOC);
|
---|
[53667] | 1405 |
|
---|
[53696] | 1406 | /* Need a buffer for extracting the function names and mangling them in
|
---|
| 1407 | case of collision. */
|
---|
[53704] | 1408 | size_t const cbFnNmBuf = _4K + _1K;
|
---|
[53696] | 1409 | char *pszFnNmBuf = (char *)RTMemAlloc(cbFnNmBuf);
|
---|
| 1410 | if (!pszFnNmBuf)
|
---|
[53667] | 1411 | return;
|
---|
| 1412 |
|
---|
[53696] | 1413 | /*
|
---|
| 1414 | * Itereate the probe location list and register all probes related to
|
---|
| 1415 | * this provider.
|
---|
| 1416 | */
|
---|
[53704] | 1417 | uint16_t const idxProv = (uint16_t)((PVTGDESCPROVIDER)((uintptr_t)pProv->pHdr + pProv->pHdr->offProviders) - pProv->pDesc);
|
---|
| 1418 | for (uint32_t idxProbeLoc = 0; idxProbeLoc < cProbeLocs; idxProbeLoc++)
|
---|
[53696] | 1419 | {
|
---|
[53704] | 1420 | /* Skip probe location belonging to other providers or once that
|
---|
| 1421 | we've already reported. */
|
---|
| 1422 | PCVTGPROBELOC pProbeLocRO = &pProv->paProbeLocsRO[idxProbeLoc];
|
---|
[53708] | 1423 | PVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
[53706] | 1424 | if (pProbeDesc->idxProvider != idxProv)
|
---|
[53704] | 1425 | continue;
|
---|
| 1426 |
|
---|
| 1427 | uint32_t *pidProbe;
|
---|
| 1428 | if (!pProv->fUmod)
|
---|
| 1429 | pidProbe = (uint32_t *)&pProbeLocRO->idProbe;
|
---|
| 1430 | else
|
---|
| 1431 | pidProbe = &pProv->paR0ProbeLocs[idxProbeLoc].idProbe;
|
---|
[53707] | 1432 | if (*pidProbe != 0)
|
---|
[53704] | 1433 | continue;
|
---|
| 1434 |
|
---|
| 1435 | /* The function name may need to be stripped since we're using C++
|
---|
| 1436 | compilers for most of the code. ASSUMES nobody are brave/stupid
|
---|
| 1437 | enough to use function pointer returns without typedef'ing
|
---|
| 1438 | properly them (e.g. signal). */
|
---|
| 1439 | const char *pszPrbName = vboxDtVtgGetString(pProv->pHdr, pProbeDesc->offName);
|
---|
| 1440 | const char *pszFunc = pProbeLocRO->pszFunction;
|
---|
| 1441 | const char *psz = strchr(pProbeLocRO->pszFunction, '(');
|
---|
| 1442 | size_t cch;
|
---|
| 1443 | if (psz)
|
---|
[53667] | 1444 | {
|
---|
[53704] | 1445 | /* skip blanks preceeding the parameter parenthesis. */
|
---|
| 1446 | while ( (uintptr_t)psz > (uintptr_t)pProbeLocRO->pszFunction
|
---|
| 1447 | && RT_C_IS_BLANK(psz[-1]))
|
---|
| 1448 | psz--;
|
---|
| 1449 |
|
---|
| 1450 | /* Find the start of the function name. */
|
---|
| 1451 | pszFunc = psz - 1;
|
---|
| 1452 | while ((uintptr_t)pszFunc > (uintptr_t)pProbeLocRO->pszFunction)
|
---|
[53667] | 1453 | {
|
---|
[53704] | 1454 | char ch = pszFunc[-1];
|
---|
| 1455 | if (!RT_C_IS_ALNUM(ch) && ch != '_' && ch != ':')
|
---|
| 1456 | break;
|
---|
| 1457 | pszFunc--;
|
---|
[53667] | 1458 | }
|
---|
[53704] | 1459 | cch = psz - pszFunc;
|
---|
| 1460 | }
|
---|
| 1461 | else
|
---|
| 1462 | cch = strlen(pszFunc);
|
---|
| 1463 | RTStrCopyEx(pszFnNmBuf, cbFnNmBuf, pszFunc, cch);
|
---|
[53667] | 1464 |
|
---|
[53704] | 1465 | /* Look up the probe, if we have one in the same function, mangle
|
---|
| 1466 | the function name a little to avoid having to deal with having
|
---|
| 1467 | multiple location entries with the same probe ID. (lazy bird) */
|
---|
[53707] | 1468 | Assert(!*pidProbe);
|
---|
[53704] | 1469 | if (dtrace_probe_lookup(idProvider, pProv->pszModName, pszFnNmBuf, pszPrbName) != DTRACE_IDNONE)
|
---|
| 1470 | {
|
---|
| 1471 | RTStrPrintf(pszFnNmBuf+cch, cbFnNmBuf - cch, "-%u", pProbeLocRO->uLine);
|
---|
[53667] | 1472 | if (dtrace_probe_lookup(idProvider, pProv->pszModName, pszFnNmBuf, pszPrbName) != DTRACE_IDNONE)
|
---|
| 1473 | {
|
---|
[53704] | 1474 | unsigned iOrd = 2;
|
---|
| 1475 | while (iOrd < 128)
|
---|
[53667] | 1476 | {
|
---|
[53704] | 1477 | RTStrPrintf(pszFnNmBuf+cch, cbFnNmBuf - cch, "-%u-%u", pProbeLocRO->uLine, iOrd);
|
---|
| 1478 | if (dtrace_probe_lookup(idProvider, pProv->pszModName, pszFnNmBuf, pszPrbName) == DTRACE_IDNONE)
|
---|
| 1479 | break;
|
---|
| 1480 | iOrd++;
|
---|
[53667] | 1481 | }
|
---|
[53704] | 1482 | if (iOrd >= 128)
|
---|
| 1483 | {
|
---|
[56989] | 1484 | LogRel(("VBoxDrv: More than 128 duplicate probe location instances at line %u in function %s [%s], probe %s\n",
|
---|
[53704] | 1485 | pProbeLocRO->uLine, pProbeLocRO->pszFunction, pszFnNmBuf, pszPrbName));
|
---|
| 1486 | continue;
|
---|
| 1487 | }
|
---|
[53667] | 1488 | }
|
---|
| 1489 | }
|
---|
| 1490 |
|
---|
[53704] | 1491 | /* Create the probe. */
|
---|
| 1492 | AssertCompile(sizeof(*pidProbe) == sizeof(dtrace_id_t));
|
---|
| 1493 | *pidProbe = dtrace_probe_create(idProvider, pProv->pszModName, pszFnNmBuf, pszPrbName,
|
---|
| 1494 | 1 /*aframes*/, (void *)(uintptr_t)idxProbeLoc);
|
---|
| 1495 | pProv->TracerData.DTrace.cProvidedProbes++;
|
---|
[53667] | 1496 | }
|
---|
| 1497 |
|
---|
| 1498 | RTMemFree(pszFnNmBuf);
|
---|
[53708] | 1499 | LOG_DTRACE(("%s: returns\n", __FUNCTION__));
|
---|
[53667] | 1500 | }
|
---|
| 1501 |
|
---|
| 1502 |
|
---|
| 1503 | /**
|
---|
| 1504 | * @callback_method_impl{dtrace_pops_t,dtps_enable}
|
---|
| 1505 | */
|
---|
| 1506 | static int vboxDtPOps_Enable(void *pvProv, dtrace_id_t idProbe, void *pvProbe)
|
---|
| 1507 | {
|
---|
[53704] | 1508 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
[53708] | 1509 | LOG_DTRACE(("%s: %p / %p - %#x / %p\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe));
|
---|
| 1510 | AssertPtrReturn(pProv->TracerData.DTrace.idProvider, EINVAL);
|
---|
[62608] | 1511 | RT_NOREF_PV(idProbe);
|
---|
[53708] | 1512 |
|
---|
[53667] | 1513 | if (!pProv->TracerData.DTrace.fZombie)
|
---|
| 1514 | {
|
---|
[53704] | 1515 | uint32_t idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
|
---|
| 1516 | PVTGPROBELOC32 pProbeLocEn = (PVTGPROBELOC32)( (uintptr_t)pProv->pvProbeLocsEn + idxProbeLoc * pProv->cbProbeLocsEn);
|
---|
| 1517 | PCVTGPROBELOC pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
|
---|
[53708] | 1518 | PCVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
[53704] | 1519 | uint32_t const idxProbe = pProbeDesc->idxEnabled;
|
---|
[53667] | 1520 |
|
---|
[53704] | 1521 | if (!pProv->fUmod)
|
---|
[53667] | 1522 | {
|
---|
[53704] | 1523 | if (!pProbeLocEn->fEnabled)
|
---|
| 1524 | {
|
---|
| 1525 | pProbeLocEn->fEnabled = 1;
|
---|
| 1526 | ASMAtomicIncU32(&pProv->pacProbeEnabled[idxProbe]);
|
---|
[58920] | 1527 | ASMAtomicIncU32(&pProv->pDesc->cProbesEnabled);
|
---|
[58986] | 1528 | ASMAtomicIncU32(&pProv->pDesc->uSettingsSerialNo);
|
---|
[53704] | 1529 | }
|
---|
[53667] | 1530 | }
|
---|
[53704] | 1531 | else
|
---|
| 1532 | {
|
---|
| 1533 | /* Update kernel mode structure */
|
---|
| 1534 | if (!pProv->paR0ProbeLocs[idxProbeLoc].fEnabled)
|
---|
| 1535 | {
|
---|
| 1536 | pProv->paR0ProbeLocs[idxProbeLoc].fEnabled = 1;
|
---|
| 1537 | ASMAtomicIncU32(&pProv->paR0Probes[idxProbe].cEnabled);
|
---|
[58920] | 1538 | ASMAtomicIncU32(&pProv->pDesc->cProbesEnabled);
|
---|
[58986] | 1539 | ASMAtomicIncU32(&pProv->pDesc->uSettingsSerialNo);
|
---|
[53704] | 1540 | }
|
---|
| 1541 |
|
---|
| 1542 | /* Update user mode structure. */
|
---|
| 1543 | pProbeLocEn->fEnabled = 1;
|
---|
| 1544 | pProv->pacProbeEnabled[idxProbe] = pProv->paR0Probes[idxProbe].cEnabled;
|
---|
| 1545 | }
|
---|
[53667] | 1546 | }
|
---|
| 1547 |
|
---|
| 1548 | return 0;
|
---|
| 1549 | }
|
---|
| 1550 |
|
---|
| 1551 |
|
---|
| 1552 | /**
|
---|
| 1553 | * @callback_method_impl{dtrace_pops_t,dtps_disable}
|
---|
| 1554 | */
|
---|
| 1555 | static void vboxDtPOps_Disable(void *pvProv, dtrace_id_t idProbe, void *pvProbe)
|
---|
| 1556 | {
|
---|
| 1557 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
[53708] | 1558 | AssertPtrReturnVoid(pProv);
|
---|
| 1559 | LOG_DTRACE(("%s: %p / %p - %#x / %p\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe));
|
---|
| 1560 | AssertPtrReturnVoid(pProv->TracerData.DTrace.idProvider);
|
---|
[62608] | 1561 | RT_NOREF_PV(idProbe);
|
---|
[53708] | 1562 |
|
---|
[53667] | 1563 | if (!pProv->TracerData.DTrace.fZombie)
|
---|
| 1564 | {
|
---|
[53704] | 1565 | uint32_t idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
|
---|
| 1566 | PVTGPROBELOC32 pProbeLocEn = (PVTGPROBELOC32)( (uintptr_t)pProv->pvProbeLocsEn + idxProbeLoc * pProv->cbProbeLocsEn);
|
---|
| 1567 | PCVTGPROBELOC pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
|
---|
[53708] | 1568 | PCVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
[53704] | 1569 | uint32_t const idxProbe = pProbeDesc->idxEnabled;
|
---|
[53667] | 1570 |
|
---|
[53704] | 1571 | if (!pProv->fUmod)
|
---|
[53667] | 1572 | {
|
---|
[53704] | 1573 | if (pProbeLocEn->fEnabled)
|
---|
| 1574 | {
|
---|
| 1575 | pProbeLocEn->fEnabled = 0;
|
---|
| 1576 | ASMAtomicDecU32(&pProv->pacProbeEnabled[idxProbe]);
|
---|
[58920] | 1577 | ASMAtomicDecU32(&pProv->pDesc->cProbesEnabled);
|
---|
[58986] | 1578 | ASMAtomicIncU32(&pProv->pDesc->uSettingsSerialNo);
|
---|
[53704] | 1579 | }
|
---|
[53667] | 1580 | }
|
---|
[53704] | 1581 | else
|
---|
| 1582 | {
|
---|
| 1583 | /* Update kernel mode structure */
|
---|
| 1584 | if (pProv->paR0ProbeLocs[idxProbeLoc].fEnabled)
|
---|
| 1585 | {
|
---|
| 1586 | pProv->paR0ProbeLocs[idxProbeLoc].fEnabled = 0;
|
---|
| 1587 | ASMAtomicDecU32(&pProv->paR0Probes[idxProbe].cEnabled);
|
---|
[58920] | 1588 | ASMAtomicDecU32(&pProv->pDesc->cProbesEnabled);
|
---|
[58986] | 1589 | ASMAtomicIncU32(&pProv->pDesc->uSettingsSerialNo);
|
---|
[53704] | 1590 | }
|
---|
| 1591 |
|
---|
| 1592 | /* Update user mode structure. */
|
---|
| 1593 | pProbeLocEn->fEnabled = 0;
|
---|
| 1594 | pProv->pacProbeEnabled[idxProbe] = pProv->paR0Probes[idxProbe].cEnabled;
|
---|
| 1595 | }
|
---|
[53667] | 1596 | }
|
---|
| 1597 | }
|
---|
| 1598 |
|
---|
| 1599 |
|
---|
| 1600 | /**
|
---|
| 1601 | * @callback_method_impl{dtrace_pops_t,dtps_getargdesc}
|
---|
| 1602 | */
|
---|
| 1603 | static void vboxDtPOps_GetArgDesc(void *pvProv, dtrace_id_t idProbe, void *pvProbe,
|
---|
[53708] | 1604 | dtrace_argdesc_t *pArgDesc)
|
---|
[53667] | 1605 | {
|
---|
| 1606 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
| 1607 | unsigned uArg = pArgDesc->dtargd_ndx;
|
---|
[62608] | 1608 | RT_NOREF_PV(idProbe);
|
---|
[53708] | 1609 |
|
---|
[53692] | 1610 | pArgDesc->dtargd_ndx = DTRACE_ARGNONE;
|
---|
[53708] | 1611 | AssertPtrReturnVoid(pProv);
|
---|
| 1612 | LOG_DTRACE(("%s: %p / %p - %#x / %p uArg=%d\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe, uArg));
|
---|
| 1613 | AssertPtrReturnVoid(pProv->TracerData.DTrace.idProvider);
|
---|
[53667] | 1614 |
|
---|
| 1615 | if (!pProv->TracerData.DTrace.fZombie)
|
---|
| 1616 | {
|
---|
[53704] | 1617 | uint32_t idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
|
---|
| 1618 | PCVTGPROBELOC pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
|
---|
[53708] | 1619 | PCVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
[53704] | 1620 | PCVTGDESCARGLIST pArgList = (PCVTGDESCARGLIST)( (uintptr_t)pProv->pHdr
|
---|
| 1621 | + pProv->pHdr->offArgLists
|
---|
| 1622 | + pProbeDesc->offArgList);
|
---|
| 1623 | AssertReturnVoid(pProbeDesc->offArgList < pProv->pHdr->cbArgLists);
|
---|
[53667] | 1624 |
|
---|
[53692] | 1625 | if (uArg < pArgList->cArgs)
|
---|
[53667] | 1626 | {
|
---|
| 1627 | const char *pszType = vboxDtVtgGetString(pProv->pHdr, pArgList->aArgs[uArg].offType);
|
---|
| 1628 | size_t cchType = strlen(pszType);
|
---|
| 1629 | if (cchType < sizeof(pArgDesc->dtargd_native))
|
---|
| 1630 | {
|
---|
| 1631 | memcpy(pArgDesc->dtargd_native, pszType, cchType + 1);
|
---|
[53708] | 1632 | /** @todo mapping? */
|
---|
[53692] | 1633 | pArgDesc->dtargd_ndx = uArg;
|
---|
[53708] | 1634 | LOG_DTRACE(("%s: returns dtargd_native = %s\n", __FUNCTION__, pArgDesc->dtargd_native));
|
---|
[53667] | 1635 | return;
|
---|
| 1636 | }
|
---|
| 1637 | }
|
---|
| 1638 | }
|
---|
| 1639 | }
|
---|
| 1640 |
|
---|
| 1641 |
|
---|
| 1642 | /**
|
---|
| 1643 | * @callback_method_impl{dtrace_pops_t,dtps_getargval}
|
---|
| 1644 | */
|
---|
| 1645 | static uint64_t vboxDtPOps_GetArgVal(void *pvProv, dtrace_id_t idProbe, void *pvProbe,
|
---|
| 1646 | int iArg, int cFrames)
|
---|
| 1647 | {
|
---|
[53708] | 1648 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
| 1649 | AssertPtrReturn(pProv, UINT64_MAX);
|
---|
| 1650 | LOG_DTRACE(("%s: %p / %p - %#x / %p iArg=%d cFrames=%u\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe, iArg, cFrames));
|
---|
[53667] | 1651 | AssertReturn(iArg >= 5, UINT64_MAX);
|
---|
[62608] | 1652 | RT_NOREF_PV(idProbe); RT_NOREF_PV(cFrames);
|
---|
| 1653 |
|
---|
[53708] | 1654 | if (pProv->TracerData.DTrace.fZombie)
|
---|
| 1655 | return UINT64_MAX;
|
---|
[53667] | 1656 |
|
---|
[53708] | 1657 | uint32_t idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
|
---|
| 1658 | PCVTGPROBELOC pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
|
---|
| 1659 | PCVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
| 1660 | PCVTGDESCARGLIST pArgList = (PCVTGDESCARGLIST)( (uintptr_t)pProv->pHdr
|
---|
| 1661 | + pProv->pHdr->offArgLists
|
---|
| 1662 | + pProbeDesc->offArgList);
|
---|
| 1663 | AssertReturn(pProbeDesc->offArgList < pProv->pHdr->cbArgLists, UINT64_MAX);
|
---|
[53667] | 1664 |
|
---|
[53708] | 1665 | PVBDTSTACKDATA pData = vboxDtGetStackData();
|
---|
| 1666 |
|
---|
| 1667 | /*
|
---|
| 1668 | * Get the stack data. This is a wee bit complicated on 32-bit systems
|
---|
| 1669 | * since we want to support 64-bit integer arguments.
|
---|
| 1670 | */
|
---|
| 1671 | uint64_t u64Ret;
|
---|
| 1672 | if (iArg >= 20)
|
---|
| 1673 | u64Ret = UINT64_MAX;
|
---|
| 1674 | else if (pData->enmCaller == kVBoxDtCaller_ProbeFireKernel)
|
---|
[53667] | 1675 | {
|
---|
[53708] | 1676 | #if ARCH_BITS == 64
|
---|
| 1677 | u64Ret = pData->u.ProbeFireKernel.pauStackArgs[iArg - 5];
|
---|
| 1678 | #else
|
---|
| 1679 | if ( !pArgList->fHaveLargeArgs
|
---|
| 1680 | || iArg >= pArgList->cArgs)
|
---|
| 1681 | u64Ret = pData->u.ProbeFireKernel.pauStackArgs[iArg - 5];
|
---|
| 1682 | else
|
---|
| 1683 | {
|
---|
| 1684 | /* Similar to what we did for mac in when calling dtrace_probe(). */
|
---|
| 1685 | uint32_t offArg = 0;
|
---|
| 1686 | for (int i = 5; i < iArg; i++)
|
---|
| 1687 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iArg].fType))
|
---|
| 1688 | offArg++;
|
---|
| 1689 | u64Ret = pData->u.ProbeFireKernel.pauStackArgs[iArg - 5 + offArg];
|
---|
| 1690 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iArg].fType))
|
---|
| 1691 | u64Ret |= (uint64_t)pData->u.ProbeFireKernel.pauStackArgs[iArg - 5 + offArg + 1] << 32;
|
---|
| 1692 | }
|
---|
| 1693 | #endif
|
---|
| 1694 | }
|
---|
| 1695 | else if (pData->enmCaller == kVBoxDtCaller_ProbeFireUser)
|
---|
| 1696 | {
|
---|
| 1697 | int offArg = pData->u.ProbeFireUser.offArg;
|
---|
| 1698 | PCSUPDRVTRACERUSRCTX pCtx = pData->u.ProbeFireUser.pCtx;
|
---|
| 1699 | AssertPtrReturn(pCtx, UINT64_MAX);
|
---|
| 1700 |
|
---|
[53667] | 1701 | if (pCtx->cBits == 32)
|
---|
| 1702 | {
|
---|
[53708] | 1703 | if ( !pArgList->fHaveLargeArgs
|
---|
| 1704 | || iArg >= pArgList->cArgs)
|
---|
| 1705 | {
|
---|
| 1706 | if (iArg + offArg < (int)RT_ELEMENTS(pCtx->u.X86.aArgs))
|
---|
[54050] | 1707 | u64Ret = pCtx->u.X86.aArgs[iArg + offArg];
|
---|
[53708] | 1708 | else
|
---|
| 1709 | u64Ret = UINT64_MAX;
|
---|
| 1710 | }
|
---|
| 1711 | else
|
---|
| 1712 | {
|
---|
| 1713 | for (int i = 5; i < iArg; i++)
|
---|
| 1714 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iArg].fType))
|
---|
| 1715 | offArg++;
|
---|
| 1716 | if (offArg + iArg < (int)RT_ELEMENTS(pCtx->u.X86.aArgs))
|
---|
| 1717 | {
|
---|
| 1718 | u64Ret = pCtx->u.X86.aArgs[iArg + offArg];
|
---|
| 1719 | if ( VTG_TYPE_IS_LARGE(pArgList->aArgs[iArg].fType)
|
---|
| 1720 | && offArg + iArg + 1 < (int)RT_ELEMENTS(pCtx->u.X86.aArgs))
|
---|
| 1721 | u64Ret |= (uint64_t)pCtx->u.X86.aArgs[iArg + offArg + 1] << 32;
|
---|
| 1722 | }
|
---|
| 1723 | else
|
---|
| 1724 | u64Ret = UINT64_MAX;
|
---|
| 1725 | }
|
---|
[53667] | 1726 | }
|
---|
[53708] | 1727 | else
|
---|
[53667] | 1728 | {
|
---|
[53708] | 1729 | if (iArg + offArg < (int)RT_ELEMENTS(pCtx->u.Amd64.aArgs))
|
---|
| 1730 | u64Ret = pCtx->u.Amd64.aArgs[iArg + offArg];
|
---|
| 1731 | else
|
---|
| 1732 | u64Ret = UINT64_MAX;
|
---|
[53667] | 1733 | }
|
---|
| 1734 | }
|
---|
[53708] | 1735 | else
|
---|
| 1736 | AssertFailedReturn(UINT64_MAX);
|
---|
[53667] | 1737 |
|
---|
[53708] | 1738 | LOG_DTRACE(("%s: returns %#llx\n", __FUNCTION__, u64Ret));
|
---|
| 1739 | return u64Ret;
|
---|
[53667] | 1740 | }
|
---|
| 1741 |
|
---|
| 1742 |
|
---|
| 1743 | /**
|
---|
| 1744 | * @callback_method_impl{dtrace_pops_t,dtps_destroy}
|
---|
| 1745 | */
|
---|
| 1746 | static void vboxDtPOps_Destroy(void *pvProv, dtrace_id_t idProbe, void *pvProbe)
|
---|
| 1747 | {
|
---|
| 1748 | PSUPDRVVDTPROVIDERCORE pProv = (PSUPDRVVDTPROVIDERCORE)pvProv;
|
---|
[53708] | 1749 | AssertPtrReturnVoid(pProv);
|
---|
| 1750 | LOG_DTRACE(("%s: %p / %p - %#x / %p\n", __FUNCTION__, pProv, pProv->TracerData.DTrace.idProvider, idProbe, pvProbe));
|
---|
| 1751 | AssertReturnVoid(pProv->TracerData.DTrace.cProvidedProbes > 0);
|
---|
| 1752 | AssertPtrReturnVoid(pProv->TracerData.DTrace.idProvider);
|
---|
| 1753 |
|
---|
[53667] | 1754 | if (!pProv->TracerData.DTrace.fZombie)
|
---|
| 1755 | {
|
---|
[53704] | 1756 | uint32_t idxProbeLoc = (uint32_t)(uintptr_t)pvProbe;
|
---|
| 1757 | PCVTGPROBELOC pProbeLocRO = (PVTGPROBELOC)&pProv->paProbeLocsRO[idxProbeLoc];
|
---|
| 1758 | uint32_t *pidProbe;
|
---|
| 1759 | if (!pProv->fUmod)
|
---|
| 1760 | {
|
---|
| 1761 | pidProbe = (uint32_t *)&pProbeLocRO->idProbe;
|
---|
| 1762 | Assert(!pProbeLocRO->fEnabled);
|
---|
| 1763 | Assert(*pidProbe == idProbe);
|
---|
| 1764 | }
|
---|
| 1765 | else
|
---|
| 1766 | {
|
---|
| 1767 | pidProbe = &pProv->paR0ProbeLocs[idxProbeLoc].idProbe;
|
---|
| 1768 | Assert(!pProv->paR0ProbeLocs[idxProbeLoc].fEnabled);
|
---|
| 1769 | Assert(*pidProbe == idProbe); NOREF(idProbe);
|
---|
| 1770 | }
|
---|
[53707] | 1771 | *pidProbe = 0;
|
---|
[53667] | 1772 | }
|
---|
| 1773 | pProv->TracerData.DTrace.cProvidedProbes--;
|
---|
| 1774 | }
|
---|
| 1775 |
|
---|
| 1776 |
|
---|
| 1777 |
|
---|
| 1778 | /**
|
---|
| 1779 | * DTrace provider method table.
|
---|
| 1780 | */
|
---|
| 1781 | static const dtrace_pops_t g_vboxDtVtgProvOps =
|
---|
| 1782 | {
|
---|
| 1783 | /* .dtps_provide = */ vboxDtPOps_Provide,
|
---|
| 1784 | /* .dtps_provide_module = */ NULL,
|
---|
| 1785 | /* .dtps_enable = */ vboxDtPOps_Enable,
|
---|
| 1786 | /* .dtps_disable = */ vboxDtPOps_Disable,
|
---|
| 1787 | /* .dtps_suspend = */ NULL,
|
---|
| 1788 | /* .dtps_resume = */ NULL,
|
---|
| 1789 | /* .dtps_getargdesc = */ vboxDtPOps_GetArgDesc,
|
---|
| 1790 | /* .dtps_getargval = */ vboxDtPOps_GetArgVal,
|
---|
| 1791 | /* .dtps_usermode = */ NULL,
|
---|
| 1792 | /* .dtps_destroy = */ vboxDtPOps_Destroy
|
---|
| 1793 | };
|
---|
| 1794 |
|
---|
| 1795 |
|
---|
| 1796 |
|
---|
| 1797 |
|
---|
| 1798 | /*
|
---|
| 1799 | *
|
---|
| 1800 | * Support Driver Tracer Interface.
|
---|
| 1801 | * Support Driver Tracer Interface.
|
---|
| 1802 | * Support Driver Tracer Interface.
|
---|
| 1803 | *
|
---|
| 1804 | */
|
---|
| 1805 |
|
---|
| 1806 |
|
---|
| 1807 |
|
---|
| 1808 | /**
|
---|
[53705] | 1809 | * interface_method_impl{SUPDRVTRACERREG,pfnProbeFireKernel}
|
---|
[53667] | 1810 | */
|
---|
[53708] | 1811 | static DECLCALLBACK(void) vboxDtTOps_ProbeFireKernel(struct VTGPROBELOC *pVtgProbeLoc, uintptr_t uArg0, uintptr_t uArg1, uintptr_t uArg2,
|
---|
| 1812 | uintptr_t uArg3, uintptr_t uArg4)
|
---|
[53667] | 1813 | {
|
---|
[53708] | 1814 | AssertPtrReturnVoid(pVtgProbeLoc);
|
---|
| 1815 | LOG_DTRACE(("%s: %p / %p\n", __FUNCTION__, pVtgProbeLoc, pVtgProbeLoc->idProbe));
|
---|
| 1816 | AssertPtrReturnVoid(pVtgProbeLoc->pProbe);
|
---|
| 1817 | AssertPtrReturnVoid(pVtgProbeLoc->pszFunction);
|
---|
| 1818 |
|
---|
[53667] | 1819 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_ProbeFireKernel);
|
---|
| 1820 |
|
---|
[53708] | 1821 | pStackData->u.ProbeFireKernel.pauStackArgs = &uArg4 + 1;
|
---|
| 1822 |
|
---|
| 1823 | #if defined(RT_OS_DARWIN) && ARCH_BITS == 32
|
---|
| 1824 | /*
|
---|
| 1825 | * Convert arguments from uintptr_t to uint64_t.
|
---|
| 1826 | */
|
---|
[53994] | 1827 | PVTGDESCPROBE pProbe = pVtgProbeLoc->pProbe;
|
---|
[53708] | 1828 | AssertPtrReturnVoid(pProbe);
|
---|
| 1829 | PVTGOBJHDR pVtgHdr = (PVTGOBJHDR)((uintptr_t)pProbe + pProbe->offObjHdr);
|
---|
| 1830 | AssertPtrReturnVoid(pVtgHdr);
|
---|
| 1831 | PVTGDESCARGLIST pArgList = (PVTGDESCARGLIST)((uintptr_t)pVtgHdr + pVtgHdr->offArgLists + pProbe->offArgList);
|
---|
| 1832 | AssertPtrReturnVoid(pArgList);
|
---|
| 1833 | if (!pArgList->fHaveLargeArgs)
|
---|
| 1834 | dtrace_probe(pVtgProbeLoc->idProbe, uArg0, uArg1, uArg2, uArg3, uArg4);
|
---|
| 1835 | else
|
---|
| 1836 | {
|
---|
| 1837 | uintptr_t *auSrcArgs = &uArg0;
|
---|
| 1838 | uint32_t iSrcArg = 0;
|
---|
| 1839 | uint32_t iDstArg = 0;
|
---|
| 1840 | uint64_t au64DstArgs[5];
|
---|
| 1841 |
|
---|
| 1842 | while ( iDstArg < RT_ELEMENTS(au64DstArgs)
|
---|
| 1843 | && iSrcArg < pArgList->cArgs)
|
---|
| 1844 | {
|
---|
| 1845 | au64DstArgs[iDstArg] = auSrcArgs[iSrcArg];
|
---|
| 1846 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iDstArg].fType))
|
---|
| 1847 | au64DstArgs[iDstArg] |= (uint64_t)auSrcArgs[++iSrcArg] << 32;
|
---|
| 1848 | iSrcArg++;
|
---|
| 1849 | iDstArg++;
|
---|
| 1850 | }
|
---|
| 1851 | while (iDstArg < RT_ELEMENTS(au64DstArgs))
|
---|
| 1852 | au64DstArgs[iDstArg++] = auSrcArgs[iSrcArg++];
|
---|
| 1853 |
|
---|
[53994] | 1854 | pStackData->u.ProbeFireKernel.pauStackArgs = &auSrcArgs[iSrcArg];
|
---|
[53708] | 1855 | dtrace_probe(pVtgProbeLoc->idProbe, au64DstArgs[0], au64DstArgs[1], au64DstArgs[2], au64DstArgs[3], au64DstArgs[4]);
|
---|
| 1856 | }
|
---|
| 1857 | #else
|
---|
[53667] | 1858 | dtrace_probe(pVtgProbeLoc->idProbe, uArg0, uArg1, uArg2, uArg3, uArg4);
|
---|
[53708] | 1859 | #endif
|
---|
[53667] | 1860 |
|
---|
| 1861 | VBDT_CLEAR_STACK_DATA();
|
---|
[53708] | 1862 | LOG_DTRACE(("%s: returns\n", __FUNCTION__));
|
---|
[53667] | 1863 | }
|
---|
| 1864 |
|
---|
| 1865 |
|
---|
| 1866 | /**
|
---|
| 1867 | * interface_method_impl{SUPDRVTRACERREG,pfnProbeFireUser}
|
---|
| 1868 | */
|
---|
[53708] | 1869 | static DECLCALLBACK(void) vboxDtTOps_ProbeFireUser(PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, PCSUPDRVTRACERUSRCTX pCtx,
|
---|
| 1870 | PCVTGOBJHDR pVtgHdr, PCVTGPROBELOC pProbeLocRO)
|
---|
[53667] | 1871 | {
|
---|
[53708] | 1872 | LOG_DTRACE(("%s: %p / %p\n", __FUNCTION__, pCtx, pCtx->idProbe));
|
---|
| 1873 | AssertPtrReturnVoid(pProbeLocRO);
|
---|
| 1874 | AssertPtrReturnVoid(pVtgHdr);
|
---|
[62608] | 1875 | RT_NOREF_PV(pThis);
|
---|
| 1876 | RT_NOREF_PV(pSession);
|
---|
[53667] | 1877 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_ProbeFireUser);
|
---|
| 1878 |
|
---|
| 1879 | if (pCtx->cBits == 32)
|
---|
[53708] | 1880 | {
|
---|
| 1881 | pStackData->u.ProbeFireUser.pCtx = pCtx;
|
---|
| 1882 | pStackData->u.ProbeFireUser.offArg = 0;
|
---|
| 1883 |
|
---|
| 1884 | #if ARCH_BITS == 64 || defined(RT_OS_DARWIN)
|
---|
| 1885 | /*
|
---|
| 1886 | * Combine two 32-bit arguments into one 64-bit argument where needed.
|
---|
| 1887 | */
|
---|
| 1888 | PVTGDESCPROBE pProbeDesc = pProbeLocRO->pProbe;
|
---|
| 1889 | AssertPtrReturnVoid(pProbeDesc);
|
---|
| 1890 | PVTGDESCARGLIST pArgList = (PVTGDESCARGLIST)((uintptr_t)pVtgHdr + pVtgHdr->offArgLists + pProbeDesc->offArgList);
|
---|
| 1891 | AssertPtrReturnVoid(pArgList);
|
---|
| 1892 |
|
---|
| 1893 | if (!pArgList->fHaveLargeArgs)
|
---|
| 1894 | dtrace_probe(pCtx->idProbe,
|
---|
| 1895 | pCtx->u.X86.aArgs[0],
|
---|
| 1896 | pCtx->u.X86.aArgs[1],
|
---|
| 1897 | pCtx->u.X86.aArgs[2],
|
---|
| 1898 | pCtx->u.X86.aArgs[3],
|
---|
| 1899 | pCtx->u.X86.aArgs[4]);
|
---|
| 1900 | else
|
---|
| 1901 | {
|
---|
| 1902 | uint32_t const *auSrcArgs = &pCtx->u.X86.aArgs[0];
|
---|
| 1903 | uint32_t iSrcArg = 0;
|
---|
| 1904 | uint32_t iDstArg = 0;
|
---|
| 1905 | uint64_t au64DstArgs[5];
|
---|
| 1906 |
|
---|
| 1907 | while ( iDstArg < RT_ELEMENTS(au64DstArgs)
|
---|
| 1908 | && iSrcArg < pArgList->cArgs)
|
---|
| 1909 | {
|
---|
| 1910 | au64DstArgs[iDstArg] = auSrcArgs[iSrcArg];
|
---|
| 1911 | if (VTG_TYPE_IS_LARGE(pArgList->aArgs[iDstArg].fType))
|
---|
| 1912 | au64DstArgs[iDstArg] |= (uint64_t)auSrcArgs[++iSrcArg] << 32;
|
---|
| 1913 | iSrcArg++;
|
---|
| 1914 | iDstArg++;
|
---|
| 1915 | }
|
---|
| 1916 | while (iDstArg < RT_ELEMENTS(au64DstArgs))
|
---|
| 1917 | au64DstArgs[iDstArg++] = auSrcArgs[iSrcArg++];
|
---|
| 1918 |
|
---|
| 1919 | pStackData->u.ProbeFireUser.offArg = iSrcArg - RT_ELEMENTS(au64DstArgs);
|
---|
| 1920 | dtrace_probe(pCtx->idProbe, au64DstArgs[0], au64DstArgs[1], au64DstArgs[2], au64DstArgs[3], au64DstArgs[4]);
|
---|
| 1921 | }
|
---|
| 1922 | #else
|
---|
[53667] | 1923 | dtrace_probe(pCtx->idProbe,
|
---|
| 1924 | pCtx->u.X86.aArgs[0],
|
---|
| 1925 | pCtx->u.X86.aArgs[1],
|
---|
| 1926 | pCtx->u.X86.aArgs[2],
|
---|
| 1927 | pCtx->u.X86.aArgs[3],
|
---|
| 1928 | pCtx->u.X86.aArgs[4]);
|
---|
[53708] | 1929 | #endif
|
---|
| 1930 | }
|
---|
[53667] | 1931 | else if (pCtx->cBits == 64)
|
---|
[53708] | 1932 | {
|
---|
| 1933 | pStackData->u.ProbeFireUser.pCtx = pCtx;
|
---|
| 1934 | pStackData->u.ProbeFireUser.offArg = 0;
|
---|
[53667] | 1935 | dtrace_probe(pCtx->idProbe,
|
---|
| 1936 | pCtx->u.Amd64.aArgs[0],
|
---|
| 1937 | pCtx->u.Amd64.aArgs[1],
|
---|
| 1938 | pCtx->u.Amd64.aArgs[2],
|
---|
| 1939 | pCtx->u.Amd64.aArgs[3],
|
---|
| 1940 | pCtx->u.Amd64.aArgs[4]);
|
---|
[53708] | 1941 | }
|
---|
[53667] | 1942 | else
|
---|
| 1943 | AssertFailed();
|
---|
| 1944 |
|
---|
| 1945 | VBDT_CLEAR_STACK_DATA();
|
---|
[53708] | 1946 | LOG_DTRACE(("%s: returns\n", __FUNCTION__));
|
---|
[53667] | 1947 | }
|
---|
| 1948 |
|
---|
| 1949 |
|
---|
| 1950 | /**
|
---|
| 1951 | * interface_method_impl{SUPDRVTRACERREG,pfnTracerOpen}
|
---|
| 1952 | */
|
---|
[53708] | 1953 | static DECLCALLBACK(int) vboxDtTOps_TracerOpen(PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uint32_t uCookie,
|
---|
| 1954 | uintptr_t uArg, uintptr_t *puSessionData)
|
---|
[53667] | 1955 | {
|
---|
| 1956 | if (uCookie != RT_MAKE_U32_FROM_U8('V', 'B', 'D', 'T'))
|
---|
| 1957 | return VERR_INVALID_MAGIC;
|
---|
| 1958 | if (uArg)
|
---|
| 1959 | return VERR_INVALID_PARAMETER;
|
---|
[62608] | 1960 | RT_NOREF_PV(pThis); RT_NOREF_PV(pSession);
|
---|
[53667] | 1961 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 1962 |
|
---|
| 1963 | int rc = dtrace_open((dtrace_state_t **)puSessionData, VBoxDtGetCurrentCreds());
|
---|
| 1964 |
|
---|
| 1965 | VBDT_CLEAR_STACK_DATA();
|
---|
| 1966 | return RTErrConvertFromErrno(rc);
|
---|
| 1967 | }
|
---|
| 1968 |
|
---|
| 1969 |
|
---|
| 1970 | /**
|
---|
| 1971 | * interface_method_impl{SUPDRVTRACERREG,pfnTracerClose}
|
---|
| 1972 | */
|
---|
[53708] | 1973 | static DECLCALLBACK(int) vboxDtTOps_TracerIoCtl(PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uintptr_t uSessionData,
|
---|
| 1974 | uintptr_t uCmd, uintptr_t uArg, int32_t *piRetVal)
|
---|
[53667] | 1975 | {
|
---|
| 1976 | AssertPtrReturn(uSessionData, VERR_INVALID_POINTER);
|
---|
[62608] | 1977 | RT_NOREF_PV(pThis); RT_NOREF_PV(pSession);
|
---|
[53667] | 1978 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 1979 |
|
---|
| 1980 | int rc = dtrace_ioctl((dtrace_state_t *)uSessionData, (intptr_t)uCmd, (intptr_t)uArg, piRetVal);
|
---|
| 1981 |
|
---|
| 1982 | VBDT_CLEAR_STACK_DATA();
|
---|
[53687] | 1983 | return RTErrConvertFromErrno(rc);
|
---|
[53667] | 1984 | }
|
---|
| 1985 |
|
---|
| 1986 |
|
---|
| 1987 | /**
|
---|
| 1988 | * interface_method_impl{SUPDRVTRACERREG,pfnTracerClose}
|
---|
| 1989 | */
|
---|
[53708] | 1990 | static DECLCALLBACK(void) vboxDtTOps_TracerClose(PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uintptr_t uSessionData)
|
---|
[53667] | 1991 | {
|
---|
| 1992 | AssertPtrReturnVoid(uSessionData);
|
---|
[62608] | 1993 | RT_NOREF_PV(pThis); RT_NOREF_PV(pSession);
|
---|
[53667] | 1994 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 1995 |
|
---|
| 1996 | dtrace_close((dtrace_state_t *)uSessionData);
|
---|
| 1997 |
|
---|
| 1998 | VBDT_CLEAR_STACK_DATA();
|
---|
| 1999 | }
|
---|
| 2000 |
|
---|
| 2001 |
|
---|
| 2002 | /**
|
---|
| 2003 | * interface_method_impl{SUPDRVTRACERREG,pfnProviderRegister}
|
---|
| 2004 | */
|
---|
[53708] | 2005 | static DECLCALLBACK(int) vboxDtTOps_ProviderRegister(PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore)
|
---|
[53667] | 2006 | {
|
---|
[53708] | 2007 | LOG_DTRACE(("%s: %p %s/%s\n", __FUNCTION__, pThis, pCore->pszModName, pCore->pszName));
|
---|
[53707] | 2008 | AssertReturn(pCore->TracerData.DTrace.idProvider == 0, VERR_INTERNAL_ERROR_3);
|
---|
[62608] | 2009 | RT_NOREF_PV(pThis);
|
---|
[53667] | 2010 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 2011 |
|
---|
| 2012 | PVTGDESCPROVIDER pDesc = pCore->pDesc;
|
---|
| 2013 | dtrace_pattr_t DtAttrs;
|
---|
| 2014 | vboxDtVtgConvAttr(&DtAttrs.dtpa_provider, &pDesc->AttrSelf);
|
---|
| 2015 | vboxDtVtgConvAttr(&DtAttrs.dtpa_mod, &pDesc->AttrModules);
|
---|
| 2016 | vboxDtVtgConvAttr(&DtAttrs.dtpa_func, &pDesc->AttrFunctions);
|
---|
| 2017 | vboxDtVtgConvAttr(&DtAttrs.dtpa_name, &pDesc->AttrNames);
|
---|
| 2018 | vboxDtVtgConvAttr(&DtAttrs.dtpa_args, &pDesc->AttrArguments);
|
---|
| 2019 |
|
---|
[53708] | 2020 | /* Note! DTrace may call us back before dtrace_register returns, so we
|
---|
| 2021 | have to point it to pCore->TracerData.DTrace.idProvider. */
|
---|
[53707] | 2022 | AssertCompile(sizeof(dtrace_provider_id_t) == sizeof(pCore->TracerData.DTrace.idProvider));
|
---|
[53667] | 2023 | int rc = dtrace_register(pCore->pszName,
|
---|
| 2024 | &DtAttrs,
|
---|
| 2025 | DTRACE_PRIV_KERNEL,
|
---|
| 2026 | NULL /* cred */,
|
---|
| 2027 | &g_vboxDtVtgProvOps,
|
---|
| 2028 | pCore,
|
---|
[53707] | 2029 | &pCore->TracerData.DTrace.idProvider);
|
---|
[53667] | 2030 | if (!rc)
|
---|
| 2031 | {
|
---|
[53708] | 2032 | LOG_DTRACE(("%s: idProvider=%p\n", __FUNCTION__, pCore->TracerData.DTrace.idProvider));
|
---|
| 2033 | AssertPtr(pCore->TracerData.DTrace.idProvider);
|
---|
[53667] | 2034 | rc = VINF_SUCCESS;
|
---|
| 2035 | }
|
---|
| 2036 | else
|
---|
[53708] | 2037 | {
|
---|
| 2038 | pCore->TracerData.DTrace.idProvider = 0;
|
---|
[53667] | 2039 | rc = RTErrConvertFromErrno(rc);
|
---|
[53708] | 2040 | }
|
---|
[53667] | 2041 |
|
---|
| 2042 | VBDT_CLEAR_STACK_DATA();
|
---|
[53708] | 2043 | LOG_DTRACE(("%s: returns %Rrc\n", __FUNCTION__, rc));
|
---|
[53667] | 2044 | return rc;
|
---|
| 2045 | }
|
---|
| 2046 |
|
---|
| 2047 |
|
---|
| 2048 | /**
|
---|
| 2049 | * interface_method_impl{SUPDRVTRACERREG,pfnProviderDeregister}
|
---|
| 2050 | */
|
---|
[53708] | 2051 | static DECLCALLBACK(int) vboxDtTOps_ProviderDeregister(PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore)
|
---|
[53667] | 2052 | {
|
---|
[53681] | 2053 | uintptr_t idProvider = pCore->TracerData.DTrace.idProvider;
|
---|
[53708] | 2054 | LOG_DTRACE(("%s: %p / %p\n", __FUNCTION__, pThis, idProvider));
|
---|
| 2055 | AssertPtrReturn(idProvider, VERR_INTERNAL_ERROR_3);
|
---|
[62608] | 2056 | RT_NOREF_PV(pThis);
|
---|
[53667] | 2057 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 2058 |
|
---|
| 2059 | dtrace_invalidate(idProvider);
|
---|
| 2060 | int rc = dtrace_unregister(idProvider);
|
---|
| 2061 | if (!rc)
|
---|
| 2062 | {
|
---|
[53707] | 2063 | pCore->TracerData.DTrace.idProvider = 0;
|
---|
[53667] | 2064 | rc = VINF_SUCCESS;
|
---|
| 2065 | }
|
---|
| 2066 | else
|
---|
| 2067 | {
|
---|
| 2068 | AssertMsg(rc == EBUSY, ("%d\n", rc));
|
---|
[53689] | 2069 | pCore->TracerData.DTrace.fZombie = true;
|
---|
[53667] | 2070 | rc = VERR_TRY_AGAIN;
|
---|
| 2071 | }
|
---|
| 2072 |
|
---|
| 2073 | VBDT_CLEAR_STACK_DATA();
|
---|
[53708] | 2074 | LOG_DTRACE(("%s: returns %Rrc\n", __FUNCTION__, rc));
|
---|
[53667] | 2075 | return rc;
|
---|
| 2076 | }
|
---|
| 2077 |
|
---|
| 2078 |
|
---|
| 2079 | /**
|
---|
| 2080 | * interface_method_impl{SUPDRVTRACERREG,pfnProviderDeregisterZombie}
|
---|
| 2081 | */
|
---|
[53708] | 2082 | static DECLCALLBACK(int) vboxDtTOps_ProviderDeregisterZombie(PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore)
|
---|
[53667] | 2083 | {
|
---|
[53681] | 2084 | uintptr_t idProvider = pCore->TracerData.DTrace.idProvider;
|
---|
[53708] | 2085 | LOG_DTRACE(("%s: %p / %p\n", __FUNCTION__, pThis, idProvider));
|
---|
| 2086 | AssertPtrReturn(idProvider, VERR_INTERNAL_ERROR_3);
|
---|
[53689] | 2087 | Assert(pCore->TracerData.DTrace.fZombie);
|
---|
[62608] | 2088 | RT_NOREF_PV(pThis);
|
---|
[53667] | 2089 | VBDT_SETUP_STACK_DATA(kVBoxDtCaller_Generic);
|
---|
| 2090 |
|
---|
| 2091 | int rc = dtrace_unregister(idProvider);
|
---|
| 2092 | if (!rc)
|
---|
| 2093 | {
|
---|
[53707] | 2094 | pCore->TracerData.DTrace.idProvider = 0;
|
---|
[53667] | 2095 | rc = VINF_SUCCESS;
|
---|
| 2096 | }
|
---|
| 2097 | else
|
---|
| 2098 | {
|
---|
| 2099 | AssertMsg(rc == EBUSY, ("%d\n", rc));
|
---|
| 2100 | rc = VERR_TRY_AGAIN;
|
---|
| 2101 | }
|
---|
| 2102 |
|
---|
| 2103 | VBDT_CLEAR_STACK_DATA();
|
---|
[53708] | 2104 | LOG_DTRACE(("%s: returns %Rrc\n", __FUNCTION__, rc));
|
---|
[53667] | 2105 | return rc;
|
---|
| 2106 | }
|
---|
| 2107 |
|
---|
| 2108 |
|
---|
| 2109 |
|
---|
| 2110 | /**
|
---|
| 2111 | * The tracer registration record of the VBox DTrace implementation
|
---|
| 2112 | */
|
---|
| 2113 | static SUPDRVTRACERREG g_VBoxDTraceReg =
|
---|
| 2114 | {
|
---|
| 2115 | SUPDRVTRACERREG_MAGIC,
|
---|
| 2116 | SUPDRVTRACERREG_VERSION,
|
---|
[53708] | 2117 | vboxDtTOps_ProbeFireKernel,
|
---|
| 2118 | vboxDtTOps_ProbeFireUser,
|
---|
| 2119 | vboxDtTOps_TracerOpen,
|
---|
| 2120 | vboxDtTOps_TracerIoCtl,
|
---|
| 2121 | vboxDtTOps_TracerClose,
|
---|
| 2122 | vboxDtTOps_ProviderRegister,
|
---|
| 2123 | vboxDtTOps_ProviderDeregister,
|
---|
| 2124 | vboxDtTOps_ProviderDeregisterZombie,
|
---|
[53667] | 2125 | SUPDRVTRACERREG_MAGIC
|
---|
| 2126 | };
|
---|
| 2127 |
|
---|
[53670] | 2128 |
|
---|
| 2129 |
|
---|
| 2130 | /**
|
---|
| 2131 | * Module termination code.
|
---|
| 2132 | *
|
---|
| 2133 | * @param hMod Opque module handle.
|
---|
| 2134 | */
|
---|
| 2135 | DECLEXPORT(void) ModuleTerm(void *hMod)
|
---|
| 2136 | {
|
---|
[53676] | 2137 | SUPR0TracerDeregisterImpl(hMod, NULL);
|
---|
| 2138 | dtrace_detach();
|
---|
[62879] | 2139 | vboxDtTermThreadDb();
|
---|
[53670] | 2140 | }
|
---|
| 2141 |
|
---|
| 2142 |
|
---|
| 2143 | /**
|
---|
| 2144 | * Module initialization code.
|
---|
| 2145 | *
|
---|
| 2146 | * @param hMod Opque module handle.
|
---|
| 2147 | */
|
---|
| 2148 | DECLEXPORT(int) ModuleInit(void *hMod)
|
---|
| 2149 | {
|
---|
[62879] | 2150 | int rc = vboxDtInitThreadDb();
|
---|
| 2151 | if (RT_SUCCESS(rc))
|
---|
[53670] | 2152 | {
|
---|
[62879] | 2153 | rc = dtrace_attach();
|
---|
| 2154 | if (rc == DDI_SUCCESS)
|
---|
| 2155 | {
|
---|
| 2156 | rc = SUPR0TracerRegisterImpl(hMod, NULL, &g_VBoxDTraceReg, &g_pVBoxDTraceHlp);
|
---|
| 2157 | if (RT_SUCCESS(rc))
|
---|
| 2158 | return rc;
|
---|
[53670] | 2159 |
|
---|
[62879] | 2160 | dtrace_detach();
|
---|
| 2161 | }
|
---|
| 2162 | else
|
---|
| 2163 | {
|
---|
| 2164 | SUPR0Printf("dtrace_attach -> %d\n", rc);
|
---|
| 2165 | rc = VERR_INTERNAL_ERROR_5;
|
---|
| 2166 | }
|
---|
| 2167 | vboxDtTermThreadDb();
|
---|
[53670] | 2168 | }
|
---|
| 2169 | else
|
---|
[62879] | 2170 | SUPR0Printf("vboxDtInitThreadDb -> %d\n", rc);
|
---|
[53670] | 2171 |
|
---|
| 2172 | return rc;
|
---|
| 2173 | }
|
---|
| 2174 |
|
---|