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-rw-r--r--src/inc/gcdecoder.cpp589
1 files changed, 589 insertions, 0 deletions
diff --git a/src/inc/gcdecoder.cpp b/src/inc/gcdecoder.cpp
new file mode 100644
index 0000000000..d337faeebc
--- /dev/null
+++ b/src/inc/gcdecoder.cpp
@@ -0,0 +1,589 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XX XX
+XX GCDecode XX
+XX XX
+XX Logic to decode the JIT method header and GC pointer tables XX
+XX XX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+*/
+
+
+#ifdef _TARGET_X86_
+
+/* This file is shared between the VM and JIT/IL and SOS/Strike directories */
+
+#include "gcinfotypes.h"
+
+/*****************************************************************************/
+/*
+ * This entire file depends upon GC2_ENCODING being set to 1
+ *
+ *****************************************************************************/
+
+size_t FASTCALL decodeUnsigned(PTR_CBYTE src, unsigned* val)
+{
+ LIMITED_METHOD_CONTRACT;
+
+ size_t size = 1;
+ BYTE byte = *src++;
+ unsigned value = byte & 0x7f;
+ while (byte & 0x80) {
+ size++;
+ byte = *src++;
+ value <<= 7;
+ value += byte & 0x7f;
+ }
+ *val = value;
+ return size;
+}
+
+size_t FASTCALL decodeUDelta(PTR_CBYTE src, unsigned* value, unsigned lastValue)
+{
+ CONTRACTL {
+ NOTHROW;
+ GC_NOTRIGGER;
+ } CONTRACTL_END;
+
+ unsigned delta;
+ size_t size = decodeUnsigned(src, &delta);
+ *value = lastValue + delta;
+ return size;
+}
+
+size_t FASTCALL decodeSigned(PTR_CBYTE src, int* val)
+{
+ CONTRACTL {
+ NOTHROW;
+ GC_NOTRIGGER;
+ } CONTRACTL_END;
+
+ size_t size = 1;
+ BYTE byte = *src++;
+ BYTE first = byte;
+ int value = byte & 0x3f;
+ while (byte & 0x80)
+ {
+ size++;
+ byte = *src++;
+ value <<= 7;
+ value += byte & 0x7f;
+ }
+ if (first & 0x40)
+ value = -value;
+ *val = value;
+ return size;
+}
+
+/*****************************************************************************/
+
+#if defined(_MSC_VER)
+#pragma optimize("tgy", on)
+#endif
+
+PTR_CBYTE FASTCALL decodeHeader(PTR_CBYTE table, InfoHdr* header)
+{
+ LIMITED_METHOD_DAC_CONTRACT;
+
+ BYTE byte = *table++;
+ BYTE encoding = byte & 0x7f;
+
+ GetInfoHdr(encoding, header);
+
+ while (byte & 0x80)
+ {
+ byte = *table++;
+ encoding = byte & 0x7f;
+ if (encoding < NEXT_FOUR_START)
+ {
+ if (encoding < SET_ARGCOUNT)
+ {
+ header->frameSize = encoding - SET_FRAMESIZE;
+ }
+ else if (encoding < SET_PROLOGSIZE)
+ {
+ header->argCount = encoding - SET_ARGCOUNT;
+ }
+ else if (encoding < SET_EPILOGSIZE)
+ {
+ header->prologSize = encoding - SET_PROLOGSIZE;
+ }
+ else if (encoding < SET_EPILOGCNT)
+ {
+ header->epilogSize = encoding - SET_EPILOGSIZE;
+ }
+ else if (encoding < SET_UNTRACKED)
+ {
+ header->epilogCount = (encoding - SET_EPILOGCNT) / 2;
+ header->epilogAtEnd = ((encoding - SET_EPILOGCNT) & 1) == 1;
+ assert(!header->epilogAtEnd || (header->epilogCount == 1));
+ }
+ else if (encoding < FIRST_FLIP)
+ {
+ header->untrackedCnt = encoding - SET_UNTRACKED;
+ }
+ else switch (encoding)
+ {
+ default:
+ assert(!"Unexpected encoding");
+ break;
+ case FLIP_EDI_SAVED:
+ header->ediSaved ^= 1;
+ break;
+ case FLIP_ESI_SAVED:
+ header->esiSaved ^= 1;
+ break;
+ case FLIP_EBX_SAVED:
+ header->ebxSaved ^= 1;
+ break;
+ case FLIP_EBP_SAVED:
+ header->ebpSaved ^= 1;
+ break;
+ case FLIP_EBP_FRAME:
+ header->ebpFrame ^= 1;
+ break;
+ case FLIP_INTERRUPTIBLE:
+ header->interruptible ^= 1;
+ break;
+ case FLIP_DOUBLE_ALIGN:
+ header->doubleAlign ^= 1;
+ break;
+ case FLIP_SECURITY:
+ header->security ^= 1;
+ break;
+ case FLIP_HANDLERS:
+ header->handlers ^= 1;
+ break;
+ case FLIP_LOCALLOC:
+ header->localloc ^= 1;
+ break;
+ case FLIP_EDITnCONTINUE:
+ header->editNcontinue ^= 1;
+ break;
+ case FLIP_VAR_PTR_TABLE_SZ:
+ header->varPtrTableSize ^= HAS_VARPTR;
+ break;
+ case FFFF_UNTRACKED_CNT:
+ header->untrackedCnt = HAS_UNTRACKED;
+ break;
+ case FLIP_VARARGS:
+ header->varargs ^= 1;
+ break;
+ case FLIP_PROF_CALLBACKS:
+ header->profCallbacks ^= 1;
+ break;
+ case FLIP_HAS_GENERICS_CONTEXT:
+ header->genericsContext ^= 1;
+ break;
+ case FLIP_GENERICS_CONTEXT_IS_METHODDESC:
+ header->genericsContextIsMethodDesc ^= 1;
+ break;
+ case FLIP_HAS_GS_COOKIE:
+ header->gsCookieOffset ^= HAS_GS_COOKIE_OFFSET;
+ break;
+ case FLIP_SYNC:
+ header->syncStartOffset ^= HAS_SYNC_OFFSET;
+ break;
+ }
+ }
+ else
+ {
+ unsigned char lowBits;
+ switch (encoding >> 4)
+ {
+ default:
+ assert(!"Unexpected encoding");
+ break;
+ case 5:
+ assert(NEXT_FOUR_FRAMESIZE == 0x50);
+ lowBits = encoding & 0xf;
+ header->frameSize <<= 4;
+ header->frameSize += lowBits;
+ break;
+ case 6:
+ assert(NEXT_FOUR_ARGCOUNT == 0x60);
+ lowBits = encoding & 0xf;
+ header->argCount <<= 4;
+ header->argCount += lowBits;
+ break;
+ case 7:
+ if ((encoding & 0x8) == 0)
+ {
+ assert(NEXT_THREE_PROLOGSIZE == 0x70);
+ lowBits = encoding & 0x7;
+ header->prologSize <<= 3;
+ header->prologSize += lowBits;
+ }
+ else
+ {
+ assert(NEXT_THREE_EPILOGSIZE == 0x78);
+ lowBits = encoding & 0x7;
+ header->epilogSize <<= 3;
+ header->epilogSize += lowBits;
+ }
+ break;
+ }
+ }
+ }
+ return table;
+}
+
+void FASTCALL decodeCallPattern(int pattern,
+ unsigned * argCnt,
+ unsigned * regMask,
+ unsigned * argMask,
+ unsigned * codeDelta)
+{
+ CONTRACTL {
+ NOTHROW;
+ GC_NOTRIGGER;
+ SUPPORTS_DAC;
+ } CONTRACTL_END;
+
+ assert((pattern>=0) && (pattern<80));
+ CallPattern pat;
+ pat.val = callPatternTable[pattern];
+ *argCnt = pat.fld.argCnt;
+ *regMask = pat.fld.regMask; // EBP,EBX,ESI,EDI
+ *argMask = pat.fld.argMask;
+ *codeDelta = pat.fld.codeDelta;
+}
+
+#define YES HAS_VARPTR
+
+const InfoHdrSmall infoHdrShortcut[128] = {
+// Prolog size
+// |
+// | Epilog size
+// | |
+// | | Epilog count
+// | | |
+// | | | Epilog at end
+// | | | |
+// | | | | EDI saved
+// | | | | |
+// | | | | | ESI saved
+// | | | | | |
+// | | | | | | EBX saved
+// | | | | | | |
+// | | | | | | | EBP saved
+// | | | | | | | |
+// | | | | | | | | EBP-frame
+// | | | | | | | | |
+// | | | | | | | | | Interruptible method
+// | | | | | | | | | |
+// | | | | | | | | | | doubleAlign
+// | | | | | | | | | | |
+// | | | | | | | | | | | security flag
+// | | | | | | | | | | | |
+// | | | | | | | | | | | | handlers
+// | | | | | | | | | | | | |
+// | | | | | | | | | | | | | localloc
+// | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | edit and continue
+// | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | varargs
+// | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | ProfCallbacks
+// | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | genericsContext
+// | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | genericsContextIsMethodDesc
+// | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | Arg count
+// | | | | | | | | | | | | | | | | | | | | Counted occurances
+// | | | | | | | | | | | | | | | | | | | | Frame size |
+// | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | untrackedCnt | Header encoding
+// | | | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | | varPtrTable | |
+// | | | | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | | | gsCookieOffs | |
+// | | | | | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | | | | syncOffs | |
+// | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+// | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+// v v v v v v v v v v v v v v v v v v v v v v v v v v v v
+ { 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1139 00
+ { 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 128738 01
+ { 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3696 02
+ { 0, 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 402 03
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 4259 04
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, // 3379 05
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 2058 06
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 1, 0 }, // 728 07
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0 }, // 984 08
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0 }, // 606 09
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0 }, // 1110 0a
+ { 0, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 1, 0 }, // 414 0b
+ { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 1553 0c
+ { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, YES }, // 584 0d
+ { 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 2182 0e
+ { 1, 2, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3445 0f
+ { 1, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1369 10
+ { 1, 2, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 515 11
+ { 1, 2, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 21127 12
+ { 1, 2, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3517 13
+ { 1, 2, 3, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 750 14
+ { 1, 4, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1876 15
+ { 1, 4, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, // 1665 16
+ { 1, 4, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 729 17
+ { 1, 4, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0 }, // 484 18
+ { 1, 4, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 331 19
+ { 2, 3, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 361 1a
+ { 2, 3, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 964 1b
+ { 2, 3, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3713 1c
+ { 2, 3, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 466 1d
+ { 2, 3, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1325 1e
+ { 2, 3, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 712 1f
+ { 2, 3, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 588 20
+ { 2, 3, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 20542 21
+ { 2, 3, 2, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3802 22
+ { 2, 3, 3, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 798 23
+ { 2, 5, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1900 24
+ { 2, 5, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 385 25
+ { 2, 5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1617 26
+ { 2, 5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, // 1743 27
+ { 2, 5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 909 28
+ { 2, 5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 1, 0 }, // 602 29
+ { 2, 5, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0 }, // 352 2a
+ { 2, 6, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 657 2b
+ { 2, 7, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, YES }, // 1283 2c
+ { 2, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 1286 2d
+ { 3, 4, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1495 2e
+ { 3, 4, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1989 2f
+ { 3, 4, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1154 30
+ { 3, 4, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 9300 31
+ { 3, 4, 2, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 392 32
+ { 3, 4, 2, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1720 33
+ { 3, 6, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1246 34
+ { 3, 6, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 800 35
+ { 3, 6, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1179 36
+ { 3, 6, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, // 1368 37
+ { 3, 6, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 349 38
+ { 3, 6, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0 }, // 505 39
+ { 3, 6, 2, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 629 3a
+ { 3, 8, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 2, YES }, // 365 3b
+ { 4, 5, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 487 3c
+ { 4, 5, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1752 3d
+ { 4, 5, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1959 3e
+ { 4, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 2436 3f
+ { 4, 5, 2, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 861 40
+ { 4, 7, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1459 41
+ { 4, 7, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 950 42
+ { 4, 7, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 1491 43
+ { 4, 7, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, // 879 44
+ { 4, 7, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, // 408 45
+ { 5, 4, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 4870 46
+ { 5, 6, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 359 47
+ { 5, 6, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 }, // 915 48
+ { 5, 6, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0 }, // 412 49
+ { 5, 6, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1288 4a
+ { 5, 6, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 1591 4b
+ { 5, 6, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, YES }, // 361 4c
+ { 5, 6, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0 }, // 623 4d
+ { 5, 8, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0 }, // 1239 4e
+ { 6, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 457 4f
+ { 6, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 606 50
+ { 6, 4, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, YES }, // 1073 51
+ { 6, 4, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, YES }, // 508 52
+ { 6, 6, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 330 53
+ { 6, 6, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 1709 54
+ { 6, 7, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 }, // 1164 55
+ { 7, 4, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 556 56
+ { 7, 5, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, YES }, // 529 57
+ { 7, 5, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, YES }, // 1423 58
+ { 7, 8, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, YES }, // 2455 59
+ { 7, 8, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 }, // 956 5a
+ { 7, 8, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, YES }, // 1399 5b
+ { 7, 8, 2, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, YES }, // 587 5c
+ { 7, 10, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 1, YES }, // 743 5d
+ { 7, 10, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0 }, // 1004 5e
+ { 7, 10, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 1, YES }, // 487 5f
+ { 7, 10, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0 }, // 337 60
+ { 7, 10, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 0, YES }, // 361 61
+ { 8, 3, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, // 560 62
+ { 8, 6, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 }, // 1377 63
+ { 9, 4, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, // 877 64
+ { 9, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 }, // 3041 65
+ { 9, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, YES }, // 349 66
+ { 10, 5, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 1, 0 }, // 2061 67
+ { 10, 5, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, // 577 68
+ { 11, 6, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 1, 0 }, // 1195 69
+ { 12, 5, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, // 491 6a
+ { 13, 8, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, YES }, // 627 6b
+ { 13, 8, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0 }, // 1099 6c
+ { 13, 10, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 6, 1, YES }, // 488 6d
+ { 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 574 6e
+ { 16, 7, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, YES }, // 1281 6f
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, YES }, // 1881 70
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 339 71
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0 }, // 2594 72
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0 }, // 339 73
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, YES }, // 2107 74
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 5, 0, YES }, // 2372 75
+ { 16, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 6, 0, YES }, // 1078 76
+ { 16, 7, 2, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, YES }, // 384 77
+ { 16, 9, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 4, 1, YES }, // 1541 78
+ { 16, 9, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 4, 1, YES }, // 975 79
+ { 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 5, 0, YES }, // 546 7a
+ { 24, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 5, 0, YES }, // 675 7b
+ { 45, 9, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, // 902 7c
+ { 51, 7, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 0, YES }, // 432 7d
+ { 51, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, YES }, // 361 7e
+ { 51, 7, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0 }, // 703 7f
+};
+
+
+bool InfoHdrSmall::isHeaderMatch(const InfoHdr& target) const
+{
+#ifdef _ASSERTE
+ // target cannot have place-holder values.
+ _ASSERTE(target.untrackedCnt != HAS_UNTRACKED &&
+ target.varPtrTableSize != HAS_VARPTR &&
+ target.gsCookieOffset != HAS_GS_COOKIE_OFFSET &&
+ target.syncStartOffset != HAS_SYNC_OFFSET);
+#endif
+
+ // compare two InfoHdr's up to but not including the untrackCnt field
+ if (memcmp(this, &target, offsetof(InfoHdr, untrackedCnt)) != 0)
+ return false;
+
+ if (untrackedCnt != target.untrackedCnt) {
+ if (target.untrackedCnt <= SET_UNTRACKED_MAX)
+ return false;
+ else if (untrackedCnt != HAS_UNTRACKED)
+ return false;
+ }
+
+ if (varPtrTableSize != target.varPtrTableSize) {
+ if ((varPtrTableSize != 0) != (target.varPtrTableSize != 0))
+ return false;
+ }
+
+ if (target.gsCookieOffset != INVALID_GS_COOKIE_OFFSET)
+ return false;
+
+ return target.syncStartOffset == INVALID_SYNC_OFFSET;
+}
+
+
+const unsigned callCommonDelta[4] = { 6,8,10,12 };
+
+/*
+ * In the callPatternTable each 32-bit unsigned value represents four bytes:
+ *
+ * byte0,byte1,byte2,byte3 => codeDelta,argMask,regMask,argCnt
+ * for example 0x0c000301 => codeDelta of 12, argMask of 0,
+ * regMask of 0x3, argCnt of 1
+ *
+ * Furthermore within the table the following maximum values are in place:
+ *
+ * codeDelta <= CP_MAX_CODE_DELTA // (0x23)
+ * argCnt <= CP_MAX_ARG_CNT // (0x02)
+ * argMask <= CP_MAX_ARG_MASK // (0x00)
+ *
+ * Note that ARG_CNT is the count of pushed args for a nested call site.
+ * And since the first two arguments are always passed in registers
+ * an ARG_CNT of 1 would mean that the nested call site had three arguments
+ *
+ * Note that ARG_MASK is the mask of pushed args that contain GC pointers
+ * since the first two arguments are always passed in registers it is
+ * a fairly rare occurance to push a GC pointer as an argument, since it
+ * only occurs for nested calls, when the third or later argument for the
+ * outer call contains a GC ref.
+ *
+ * Additionally the encoding of the regMask uses the following bits:
+ * EDI = 0x1, ESI = 0x2, EBX = 0x4, EBP = 0x8
+ *
+ */
+const unsigned callPatternTable[80] = { // # of occurances
+ 0x0a000200, // 30109
+ 0x0c000200, // 22970
+ 0x0c000201, // 19005
+ 0x0a000300, // 12193
+ 0x0c000300, // 10614
+ 0x0e000200, // 10253
+ 0x10000200, // 9746
+ 0x0b000200, // 9698
+ 0x0d000200, // 9625
+ 0x08000200, // 8909
+ 0x0c000301, // 8522
+ 0x11000200, // 7382
+ 0x0e000300, // 7357
+ 0x12000200, // 7139
+ 0x10000300, // 7062
+ 0x11000300, // 6970
+ 0x0a000201, // 6842
+ 0x0a000100, // 6803
+ 0x0f000200, // 6795
+ 0x13000200, // 6559
+ 0x08000300, // 6079
+ 0x15000200, // 5874
+ 0x0d000201, // 5492
+ 0x0c000100, // 5193
+ 0x0d000300, // 5165
+ 0x23000200, // 5143
+ 0x1b000200, // 5035
+ 0x14000200, // 4872
+ 0x0f000300, // 4850
+ 0x0a000700, // 4781
+ 0x09000200, // 4560
+ 0x12000300, // 4496
+ 0x16000200, // 4180
+ 0x07000200, // 4021
+ 0x09000300, // 4012
+ 0x0c000700, // 3988
+ 0x0c000600, // 3946
+ 0x0e000100, // 3823
+ 0x1a000200, // 3764
+ 0x18000200, // 3744
+ 0x17000200, // 3736
+ 0x1f000200, // 3671
+ 0x13000300, // 3559
+ 0x0a000600, // 3214
+ 0x0e000600, // 3109
+ 0x08000201, // 2984
+ 0x0b000300, // 2928
+ 0x0a000301, // 2859
+ 0x07000100, // 2826
+ 0x13000100, // 2782
+ 0x09000301, // 2644
+ 0x19000200, // 2638
+ 0x11000700, // 2618
+ 0x21000200, // 2518
+ 0x0d000202, // 2484
+ 0x10000100, // 2480
+ 0x0f000600, // 2413
+ 0x14000300, // 2363
+ 0x0c000500, // 2362
+ 0x08000301, // 2285
+ 0x20000200, // 2245
+ 0x10000700, // 2240
+ 0x0f000100, // 2236
+ 0x1e000200, // 2214
+ 0x0c000400, // 2193
+ 0x16000300, // 2171
+ 0x12000600, // 2132
+ 0x22000200, // 2011
+ 0x1d000200, // 2011
+ 0x0c000f00, // 1996
+ 0x0e000700, // 1971
+ 0x0a000400, // 1970
+ 0x09000201, // 1932
+ 0x10000600, // 1903
+ 0x15000300, // 1847
+ 0x0a000101, // 1814
+ 0x0a000b00, // 1771
+ 0x0c000601, // 1737
+ 0x09000700, // 1737
+ 0x07000300, // 1684
+};
+
+#endif // _TARGET_X86_
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 17:37:46 +0000