sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Management of the translation table and cache. ---*/ |
njn | 8bddf58 | 2005-05-13 23:40:55 +0000 | [diff] [blame] | 4 | /*--- m_transtab.c ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
njn | b9c427c | 2004-12-01 14:14:42 +0000 | [diff] [blame] | 8 | This file is part of Valgrind, a dynamic binary instrumentation |
| 9 | framework. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 10 | |
sewardj | 0f157dd | 2013-10-18 14:27:36 +0000 | [diff] [blame] | 11 | Copyright (C) 2000-2013 Julian Seward |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 12 | jseward@acm.org |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 29 | The GNU General Public License is contained in the file COPYING. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 32 | #include "pub_core_basics.h" |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 33 | #include "pub_core_debuglog.h" |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 34 | #include "pub_core_machine.h" // For VG_(machine_get_VexArchInfo) |
njn | 97405b2 | 2005-06-02 03:39:33 +0000 | [diff] [blame] | 35 | #include "pub_core_libcbase.h" |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 36 | #include "pub_core_vki.h" // to keep pub_core_libproc.h happy, sigh |
| 37 | #include "pub_core_libcproc.h" // VG_(invalidate_icache) |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 38 | #include "pub_core_libcassert.h" |
njn | 36a20fa | 2005-06-03 03:08:39 +0000 | [diff] [blame] | 39 | #include "pub_core_libcprint.h" |
njn | 2024234 | 2005-05-16 23:31:24 +0000 | [diff] [blame] | 40 | #include "pub_core_options.h" |
sewardj | 10f08cf | 2005-06-29 10:16:14 +0000 | [diff] [blame] | 41 | #include "pub_core_tooliface.h" // For VG_(details).avg_translation_sizeB |
njn | 8bddf58 | 2005-05-13 23:40:55 +0000 | [diff] [blame] | 42 | #include "pub_core_transtab.h" |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 43 | #include "pub_core_aspacemgr.h" |
| 44 | #include "pub_core_mallocfree.h" // VG_(out_of_memory_NORETURN) |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 45 | #include "pub_core_xarray.h" |
| 46 | #include "pub_core_dispatch.h" // For VG_(disp_cp*) addresses |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 47 | |
| 48 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 49 | #define DEBUG_TRANSTAB 0 |
sewardj | 18d7513 | 2002-05-16 11:06:21 +0000 | [diff] [blame] | 50 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 51 | |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 52 | /*-------------------------------------------------------------*/ |
| 53 | /*--- Management of the FIFO-based translation table+cache. ---*/ |
| 54 | /*-------------------------------------------------------------*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 55 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 56 | /* Nr of sectors provided via command line parameter. */ |
| 57 | UInt VG_(clo_num_transtab_sectors) = N_SECTORS_DEFAULT; |
| 58 | /* Nr of sectors. |
| 59 | Will be set by VG_(init_tt_tc) to VG_(clo_num_transtab_sectors). */ |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 60 | static UInt n_sectors = 0; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 61 | |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 62 | /*------------------ CONSTANTS ------------------*/ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 63 | /* Number of TC entries in each sector. This needs to be a prime |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 64 | number to work properly, it must be <= 65535 (so that a TT index |
| 65 | fits in a UShort, leaving room for 0xFFFF(EC2TTE_DELETED) to denote |
| 66 | 'deleted') and it is strongly recommended not to change this. |
| 67 | 65521 is the largest prime <= 65535. */ |
sewardj | e25053c | 2012-04-23 09:53:20 +0000 | [diff] [blame] | 68 | #define N_TTES_PER_SECTOR /*10007*/ /*30011*/ /*40009*/ 65521 |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 69 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 70 | /* Because each sector contains a hash table of TTEntries, we need to |
| 71 | specify the maximum allowable loading, after which the sector is |
| 72 | deemed full. */ |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 73 | #define SECTOR_TT_LIMIT_PERCENT 65 |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 74 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 75 | /* The sector is deemed full when this many entries are in it. */ |
| 76 | #define N_TTES_PER_SECTOR_USABLE \ |
| 77 | ((N_TTES_PER_SECTOR * SECTOR_TT_LIMIT_PERCENT) / 100) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 78 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 79 | /* Equivalence classes for fast address range deletion. There are 1 + |
| 80 | 2^ECLASS_WIDTH bins. The highest one, ECLASS_MISC, describes an |
| 81 | address range which does not fall cleanly within any specific bin. |
| 82 | Note that ECLASS_SHIFT + ECLASS_WIDTH must be < 32. */ |
| 83 | #define ECLASS_SHIFT 11 |
| 84 | #define ECLASS_WIDTH 8 |
| 85 | #define ECLASS_MISC (1 << ECLASS_WIDTH) |
| 86 | #define ECLASS_N (1 + ECLASS_MISC) |
| 87 | |
| 88 | #define EC2TTE_DELETED 0xFFFF /* 16-bit special value */ |
| 89 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 90 | |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 91 | /*------------------ TYPES ------------------*/ |
| 92 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 93 | /* In edges ("to-me") in the graph created by chaining. */ |
| 94 | typedef |
| 95 | struct { |
| 96 | UInt from_sNo; /* sector number */ |
| 97 | UInt from_tteNo; /* TTE number in given sector */ |
| 98 | UInt from_offs; /* code offset from TCEntry::tcptr where the patch is */ |
| 99 | Bool to_fastEP; /* Is the patch to a fast or slow entry point? */ |
| 100 | } |
| 101 | InEdge; |
| 102 | |
| 103 | |
| 104 | /* Out edges ("from-me") in the graph created by chaining. */ |
| 105 | typedef |
| 106 | struct { |
| 107 | UInt to_sNo; /* sector number */ |
| 108 | UInt to_tteNo; /* TTE number in given sector */ |
| 109 | UInt from_offs; /* code offset in owning translation where patch is */ |
| 110 | } |
| 111 | OutEdge; |
| 112 | |
| 113 | |
| 114 | #define N_FIXED_IN_EDGE_ARR 3 |
| 115 | typedef |
| 116 | struct { |
| 117 | UInt n_fixed; /* 0 .. N_FIXED_IN_EDGE_ARR */ |
| 118 | InEdge fixed[N_FIXED_IN_EDGE_ARR]; |
| 119 | XArray* var; /* XArray* of InEdgeArr */ |
| 120 | } |
| 121 | InEdgeArr; |
| 122 | |
| 123 | #define N_FIXED_OUT_EDGE_ARR 2 |
| 124 | typedef |
| 125 | struct { |
| 126 | UInt n_fixed; /* 0 .. N_FIXED_OUT_EDGE_ARR */ |
| 127 | OutEdge fixed[N_FIXED_OUT_EDGE_ARR]; |
| 128 | XArray* var; /* XArray* of OutEdgeArr */ |
| 129 | } |
| 130 | OutEdgeArr; |
| 131 | |
| 132 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 133 | /* A translation-table entry. This indicates precisely which areas of |
| 134 | guest code are included in the translation, and contains all other |
| 135 | auxiliary info too. */ |
| 136 | typedef |
| 137 | struct { |
| 138 | /* Profiling only: the count and weight (arbitrary meaning) for |
| 139 | this translation. Weight is a property of the translation |
| 140 | itself and computed once when the translation is created. |
| 141 | Count is an entry count for the translation and is |
| 142 | incremented by 1 every time the translation is used, if we |
| 143 | are profiling. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 144 | ULong count; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 145 | UShort weight; |
| 146 | |
| 147 | /* Status of the slot. Note, we need to be able to do lazy |
| 148 | deletion, hence the Deleted state. */ |
| 149 | enum { InUse, Deleted, Empty } status; |
| 150 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 151 | /* 64-bit aligned pointer to one or more 64-bit words containing |
| 152 | the corresponding host code (must be in the same sector!) |
| 153 | This is a pointer into the sector's tc (code) area. */ |
| 154 | ULong* tcptr; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 155 | |
| 156 | /* This is the original guest address that purportedly is the |
| 157 | entry point of the translation. You might think that .entry |
| 158 | should be the same as .vge->base[0], and most of the time it |
| 159 | is. However, when doing redirections, that is not the case. |
| 160 | .vge must always correctly describe the guest code sections |
| 161 | from which this translation was made. However, .entry may or |
| 162 | may not be a lie, depending on whether or not we're doing |
| 163 | redirection. */ |
| 164 | Addr64 entry; |
| 165 | |
| 166 | /* This structure describes precisely what ranges of guest code |
| 167 | the translation covers, so we can decide whether or not to |
| 168 | delete it when translations of a given address range are |
| 169 | invalidated. */ |
| 170 | VexGuestExtents vge; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 171 | |
| 172 | /* Address range summary info: these are pointers back to |
| 173 | eclass[] entries in the containing Sector. Those entries in |
| 174 | turn point back here -- the two structures are mutually |
| 175 | redundant but both necessary to make fast deletions work. |
| 176 | The eclass info is similar to, and derived from, this entry's |
| 177 | 'vge' field, but it is not the same */ |
| 178 | UShort n_tte2ec; // # tte2ec pointers (1 to 3) |
| 179 | UShort tte2ec_ec[3]; // for each, the eclass # |
| 180 | UInt tte2ec_ix[3]; // and the index within the eclass. |
| 181 | // for i in 0 .. n_tte2ec-1 |
| 182 | // sec->ec2tte[ tte2ec_ec[i] ][ tte2ec_ix[i] ] |
| 183 | // should be the index |
| 184 | // of this TTEntry in the containing Sector's tt array. |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 185 | |
| 186 | /* Admin information for chaining. 'in_edges' is a set of the |
| 187 | patch points which jump to this translation -- hence are |
| 188 | predecessors in the control flow graph. 'out_edges' points |
| 189 | to successors in the control flow graph -- translations to |
| 190 | which this one has a patched jump. In short these are just |
| 191 | backwards and forwards edges in the graph of patched-together |
| 192 | blocks. The 'in_edges' contain slightly more info, enough |
| 193 | that we can undo the chaining of each mentioned patch point. |
| 194 | The 'out_edges' list exists only so that we can visit the |
| 195 | 'in_edges' entries of all blocks we're patched through to, in |
| 196 | order to remove ourselves from then when we're deleted. */ |
| 197 | |
| 198 | /* A translation can disappear for two reasons: |
| 199 | 1. erased (as part of the oldest sector cleanup) when the |
| 200 | youngest sector is full. |
| 201 | 2. discarded due to calls to VG_(discard_translations). |
| 202 | VG_(discard_translations) sets the status of the |
| 203 | translation to 'Deleted'. |
| 204 | A.o., the gdbserver discards one or more translations |
| 205 | when a breakpoint is inserted or removed at an Addr, |
| 206 | or when single stepping mode is enabled/disabled |
| 207 | or when a translation is instrumented for gdbserver |
| 208 | (all the target jumps of this translation are |
| 209 | invalidated). |
| 210 | |
| 211 | So, it is possible that the translation A to be patched |
| 212 | (to obtain a patched jump from A to B) is invalidated |
| 213 | after B is translated and before A is patched. |
| 214 | In case a translation is erased or discarded, the patching |
| 215 | cannot be done. VG_(tt_tc_do_chaining) and find_TTEntry_from_hcode |
| 216 | are checking the 'from' translation still exists before |
| 217 | doing the patching. |
| 218 | |
| 219 | Is it safe to erase or discard the current translation E being |
| 220 | executed ? Amazing, but yes, it is safe. |
| 221 | Here is the explanation: |
| 222 | |
| 223 | The translation E being executed can only be erased if a new |
| 224 | translation N is being done. A new translation is done only |
| 225 | if the host addr is a not yet patched jump to another |
| 226 | translation. In such a case, the guest address of N is |
| 227 | assigned to the PC in the VEX state. Control is returned |
| 228 | to the scheduler. N will be translated. This can erase the |
| 229 | translation E (in case of sector full). VG_(tt_tc_do_chaining) |
| 230 | will not do the chaining to a non found translation E. |
| 231 | The execution will continue at the current guest PC |
| 232 | (i.e. the translation N). |
| 233 | => it is safe to erase the current translation being executed. |
| 234 | |
| 235 | The current translation E being executed can also be discarded |
| 236 | (e.g. by gdbserver). VG_(discard_translations) will mark |
| 237 | this translation E as Deleted, but the translation itself |
| 238 | is not erased. In particular, its host code can only |
| 239 | be overwritten or erased in case a new translation is done. |
| 240 | A new translation will only be done if a not yet translated |
| 241 | jump is to be executed. The execution of the Deleted translation |
| 242 | E will continue till a non patched jump is encountered. |
| 243 | This situation is then similar to the 'erasing' case above : |
| 244 | the current translation E can be erased or overwritten, as the |
| 245 | execution will continue at the new translation N. |
| 246 | |
| 247 | */ |
| 248 | |
| 249 | /* It is possible, although very unlikely, that a block A has |
| 250 | more than one patched jump to block B. This could happen if |
| 251 | (eg) A finishes "jcond B; jmp B". |
| 252 | |
| 253 | This means in turn that B's in_edges set can list A more than |
| 254 | once (twice in this example). However, each such entry must |
| 255 | have a different from_offs, since a patched jump can only |
| 256 | jump to one place at once (it's meaningless for it to have |
| 257 | multiple destinations.) IOW, the successor and predecessor |
| 258 | edges in the graph are not uniquely determined by a |
| 259 | TTEntry --> TTEntry pair, but rather by a |
| 260 | (TTEntry,offset) --> TTEntry triple. |
| 261 | |
| 262 | If A has multiple edges to B then B will mention A multiple |
| 263 | times in its in_edges. To make things simpler, we then |
| 264 | require that A mentions B exactly the same number of times in |
| 265 | its out_edges. Furthermore, a matching out-in pair must have |
| 266 | the same offset (from_offs). This facilitates sanity |
| 267 | checking, and it facilitates establishing the invariant that |
| 268 | a out_edges set may not have duplicates when using the |
| 269 | equality defined by (TTEntry,offset). Hence the out_edges |
| 270 | and in_edges sets really do have both have set semantics. |
| 271 | |
| 272 | eg if A has been patched to B at offsets 42 and 87 (in A) |
| 273 | then A.out_edges = { (B,42), (B,87) } (in any order) |
| 274 | and B.in_edges = { (A,42), (A,87) } (in any order) |
| 275 | |
| 276 | Hence for each node pair P->Q in the graph, there's a 1:1 |
| 277 | mapping between P.out_edges and Q.in_edges. |
| 278 | */ |
| 279 | InEdgeArr in_edges; |
| 280 | OutEdgeArr out_edges; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 281 | } |
| 282 | TTEntry; |
| 283 | |
sewardj | 4ccf707 | 2004-11-28 16:58:05 +0000 | [diff] [blame] | 284 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 285 | /* A structure used for mapping host code addresses back to the |
| 286 | relevant TTEntry. Used when doing chaining, for finding the |
| 287 | TTEntry to which some arbitrary patch address belongs. */ |
| 288 | typedef |
| 289 | struct { |
| 290 | UChar* start; |
| 291 | UInt len; |
| 292 | UInt tteNo; |
| 293 | } |
| 294 | HostExtent; |
| 295 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 296 | /* Finally, a sector itself. Each sector contains an array of |
| 297 | TCEntries, which hold code, and an array of TTEntries, containing |
| 298 | all required administrative info. Profiling is supported using the |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 299 | TTEntry .count and .weight fields, if required. |
sewardj | 4ccf707 | 2004-11-28 16:58:05 +0000 | [diff] [blame] | 300 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 301 | If the sector is not in use, all three pointers are NULL and |
| 302 | tt_n_inuse is zero. |
| 303 | */ |
| 304 | typedef |
| 305 | struct { |
| 306 | /* The TCEntry area. Size of this depends on the average |
| 307 | translation size. We try and size it so it becomes full |
| 308 | precisely when this sector's translation table (tt) reaches |
| 309 | its load limit (SECTOR_TT_LIMIT_PERCENT). */ |
| 310 | ULong* tc; |
sewardj | 4ccf707 | 2004-11-28 16:58:05 +0000 | [diff] [blame] | 311 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 312 | /* The TTEntry array. This is a fixed size, always containing |
| 313 | exactly N_TTES_PER_SECTOR entries. */ |
| 314 | TTEntry* tt; |
sewardj | 4ccf707 | 2004-11-28 16:58:05 +0000 | [diff] [blame] | 315 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 316 | /* This points to the current allocation point in tc. */ |
| 317 | ULong* tc_next; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 318 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 319 | /* The count of tt entries with state InUse. */ |
| 320 | Int tt_n_inuse; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 321 | |
| 322 | /* Expandable arrays of tt indices for each of the ECLASS_N |
| 323 | address range equivalence classes. These hold indices into |
| 324 | the containing sector's tt array, which in turn should point |
| 325 | back here. */ |
| 326 | Int ec2tte_size[ECLASS_N]; |
| 327 | Int ec2tte_used[ECLASS_N]; |
| 328 | UShort* ec2tte[ECLASS_N]; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 329 | |
| 330 | /* The host extents. The [start, +len) ranges are constructed |
| 331 | in strictly non-overlapping order, so we can binary search |
| 332 | them at any time. */ |
| 333 | XArray* host_extents; /* XArray* of HostExtent */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 334 | } |
| 335 | Sector; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 336 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 337 | |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 338 | /*------------------ DECLS ------------------*/ |
| 339 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 340 | /* The root data structure is an array of sectors. The index of the |
| 341 | youngest sector is recorded, and new translations are put into that |
| 342 | sector. When it fills up, we move along to the next sector and |
| 343 | start to fill that up, wrapping around at the end of the array. |
| 344 | That way, once all N_TC_SECTORS have been bought into use for the |
| 345 | first time, and are full, we then re-use the oldest sector, |
| 346 | endlessly. |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 347 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 348 | When running, youngest sector should be between >= 0 and < |
| 349 | N_TC_SECTORS. The initial -1 value indicates the TT/TC system is |
| 350 | not yet initialised. |
| 351 | */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 352 | static Sector sectors[MAX_N_SECTORS]; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 353 | static Int youngest_sector = -1; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 354 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 355 | /* The number of ULongs in each TCEntry area. This is computed once |
| 356 | at startup and does not change. */ |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 357 | static Int tc_sector_szQ = 0; |
nethercote | 92e7b7f | 2004-08-07 17:52:25 +0000 | [diff] [blame] | 358 | |
| 359 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 360 | /* A list of sector numbers, in the order which they should be |
| 361 | searched to find translations. This is an optimisation to be used |
| 362 | when searching for translations and should not affect |
| 363 | correctness. -1 denotes "no entry". */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 364 | static Int sector_search_order[MAX_N_SECTORS]; |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 365 | |
| 366 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 367 | /* Fast helper for the TC. A direct-mapped cache which holds a set of |
| 368 | recently used (guest address, host address) pairs. This array is |
| 369 | referred to directly from m_dispatch/dispatch-<platform>.S. |
sewardj | 8aef119 | 2002-07-24 09:36:36 +0000 | [diff] [blame] | 370 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 371 | Entries in tt_fast may refer to any valid TC entry, regardless of |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 372 | which sector it's in. Consequently we must be very careful to |
| 373 | invalidate this cache when TC entries are changed or disappear. |
| 374 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 375 | A special .guest address - TRANSTAB_BOGUS_GUEST_ADDR -- must be |
| 376 | pointed at to cause that cache entry to miss. This relies on the |
| 377 | assumption that no guest code actually has that address, hence a |
| 378 | value 0x1 seems good. m_translate gives the client a synthetic |
| 379 | segfault if it tries to execute at this address. |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 380 | */ |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 381 | /* |
| 382 | typedef |
| 383 | struct { |
| 384 | Addr guest; |
| 385 | Addr host; |
| 386 | } |
| 387 | FastCacheEntry; |
| 388 | */ |
| 389 | /*global*/ __attribute__((aligned(16))) |
| 390 | FastCacheEntry VG_(tt_fast)[VG_TT_FAST_SIZE]; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 391 | |
sewardj | 663a1bd | 2005-04-24 11:22:44 +0000 | [diff] [blame] | 392 | /* Make sure we're not used before initialisation. */ |
| 393 | static Bool init_done = False; |
| 394 | |
| 395 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 396 | /*------------------ STATS DECLS ------------------*/ |
| 397 | |
| 398 | /* Number of fast-cache updates and flushes done. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 399 | static ULong n_fast_flushes = 0; |
| 400 | static ULong n_fast_updates = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 401 | |
| 402 | /* Number of full lookups done. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 403 | static ULong n_full_lookups = 0; |
| 404 | static ULong n_lookup_probes = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 405 | |
sewardj | 26412bd | 2005-07-07 10:05:05 +0000 | [diff] [blame] | 406 | /* Number/osize/tsize of translations entered; also the number of |
| 407 | those for which self-checking was requested. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 408 | static ULong n_in_count = 0; |
| 409 | static ULong n_in_osize = 0; |
| 410 | static ULong n_in_tsize = 0; |
| 411 | static ULong n_in_sc_count = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 412 | |
| 413 | /* Number/osize of translations discarded due to lack of space. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 414 | static ULong n_dump_count = 0; |
| 415 | static ULong n_dump_osize = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 416 | |
| 417 | /* Number/osize of translations discarded due to requests to do so. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 418 | static ULong n_disc_count = 0; |
| 419 | static ULong n_disc_osize = 0; |
| 420 | |
| 421 | |
| 422 | /*-------------------------------------------------------------*/ |
| 423 | /*--- Misc ---*/ |
| 424 | /*-------------------------------------------------------------*/ |
| 425 | |
florian | 54fe202 | 2012-10-27 23:07:42 +0000 | [diff] [blame] | 426 | static void* ttaux_malloc ( const HChar* tag, SizeT n ) |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 427 | { |
| 428 | return VG_(arena_malloc)(VG_AR_TTAUX, tag, n); |
| 429 | } |
| 430 | |
| 431 | static void ttaux_free ( void* p ) |
| 432 | { |
| 433 | VG_(arena_free)(VG_AR_TTAUX, p); |
| 434 | } |
| 435 | |
| 436 | |
| 437 | /*-------------------------------------------------------------*/ |
| 438 | /*--- Chaining support ---*/ |
| 439 | /*-------------------------------------------------------------*/ |
| 440 | |
| 441 | static inline TTEntry* index_tte ( UInt sNo, UInt tteNo ) |
| 442 | { |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 443 | vg_assert(sNo < n_sectors); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 444 | vg_assert(tteNo < N_TTES_PER_SECTOR); |
| 445 | Sector* s = §ors[sNo]; |
| 446 | vg_assert(s->tt); |
| 447 | TTEntry* tte = &s->tt[tteNo]; |
| 448 | vg_assert(tte->status == InUse); |
| 449 | return tte; |
| 450 | } |
| 451 | |
| 452 | static void InEdge__init ( InEdge* ie ) |
| 453 | { |
| 454 | ie->from_sNo = -1; /* invalid */ |
| 455 | ie->from_tteNo = 0; |
| 456 | ie->from_offs = 0; |
| 457 | ie->to_fastEP = False; |
| 458 | } |
| 459 | |
| 460 | static void OutEdge__init ( OutEdge* oe ) |
| 461 | { |
| 462 | oe->to_sNo = -1; /* invalid */ |
| 463 | oe->to_tteNo = 0; |
| 464 | oe->from_offs = 0; |
| 465 | } |
| 466 | |
| 467 | static void TTEntry__init ( TTEntry* tte ) |
| 468 | { |
| 469 | VG_(memset)(tte, 0, sizeof(*tte)); |
| 470 | } |
| 471 | |
| 472 | static UWord InEdgeArr__size ( InEdgeArr* iea ) |
| 473 | { |
| 474 | if (iea->var) { |
| 475 | vg_assert(iea->n_fixed == 0); |
| 476 | return VG_(sizeXA)(iea->var); |
| 477 | } else { |
| 478 | vg_assert(iea->n_fixed <= N_FIXED_IN_EDGE_ARR); |
| 479 | return iea->n_fixed; |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | static void InEdgeArr__makeEmpty ( InEdgeArr* iea ) |
| 484 | { |
| 485 | if (iea->var) { |
| 486 | vg_assert(iea->n_fixed == 0); |
| 487 | VG_(deleteXA)(iea->var); |
| 488 | iea->var = NULL; |
| 489 | } else { |
| 490 | vg_assert(iea->n_fixed <= N_FIXED_IN_EDGE_ARR); |
| 491 | iea->n_fixed = 0; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | static |
| 496 | InEdge* InEdgeArr__index ( InEdgeArr* iea, UWord i ) |
| 497 | { |
| 498 | if (iea->var) { |
| 499 | vg_assert(iea->n_fixed == 0); |
| 500 | return (InEdge*)VG_(indexXA)(iea->var, i); |
| 501 | } else { |
| 502 | vg_assert(i < iea->n_fixed); |
| 503 | return &iea->fixed[i]; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | static |
| 508 | void InEdgeArr__deleteIndex ( InEdgeArr* iea, UWord i ) |
| 509 | { |
| 510 | if (iea->var) { |
| 511 | vg_assert(iea->n_fixed == 0); |
| 512 | VG_(removeIndexXA)(iea->var, i); |
| 513 | } else { |
| 514 | vg_assert(i < iea->n_fixed); |
| 515 | for (; i+1 < iea->n_fixed; i++) { |
| 516 | iea->fixed[i] = iea->fixed[i+1]; |
| 517 | } |
| 518 | iea->n_fixed--; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | static |
| 523 | void InEdgeArr__add ( InEdgeArr* iea, InEdge* ie ) |
| 524 | { |
| 525 | if (iea->var) { |
| 526 | vg_assert(iea->n_fixed == 0); |
| 527 | VG_(addToXA)(iea->var, ie); |
| 528 | } else { |
| 529 | vg_assert(iea->n_fixed <= N_FIXED_IN_EDGE_ARR); |
| 530 | if (iea->n_fixed == N_FIXED_IN_EDGE_ARR) { |
| 531 | /* The fixed array is full, so we have to initialise an |
| 532 | XArray and copy the fixed array into it. */ |
| 533 | iea->var = VG_(newXA)(ttaux_malloc, "transtab.IEA__add", |
| 534 | ttaux_free, |
| 535 | sizeof(InEdge)); |
| 536 | UWord i; |
| 537 | for (i = 0; i < iea->n_fixed; i++) { |
| 538 | VG_(addToXA)(iea->var, &iea->fixed[i]); |
| 539 | } |
| 540 | VG_(addToXA)(iea->var, ie); |
| 541 | iea->n_fixed = 0; |
| 542 | } else { |
| 543 | /* Just add to the fixed array. */ |
| 544 | iea->fixed[iea->n_fixed++] = *ie; |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | static UWord OutEdgeArr__size ( OutEdgeArr* oea ) |
| 550 | { |
| 551 | if (oea->var) { |
| 552 | vg_assert(oea->n_fixed == 0); |
| 553 | return VG_(sizeXA)(oea->var); |
| 554 | } else { |
| 555 | vg_assert(oea->n_fixed <= N_FIXED_OUT_EDGE_ARR); |
| 556 | return oea->n_fixed; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static void OutEdgeArr__makeEmpty ( OutEdgeArr* oea ) |
| 561 | { |
| 562 | if (oea->var) { |
| 563 | vg_assert(oea->n_fixed == 0); |
| 564 | VG_(deleteXA)(oea->var); |
| 565 | oea->var = NULL; |
| 566 | } else { |
| 567 | vg_assert(oea->n_fixed <= N_FIXED_OUT_EDGE_ARR); |
| 568 | oea->n_fixed = 0; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | static |
| 573 | OutEdge* OutEdgeArr__index ( OutEdgeArr* oea, UWord i ) |
| 574 | { |
| 575 | if (oea->var) { |
| 576 | vg_assert(oea->n_fixed == 0); |
| 577 | return (OutEdge*)VG_(indexXA)(oea->var, i); |
| 578 | } else { |
| 579 | vg_assert(i < oea->n_fixed); |
| 580 | return &oea->fixed[i]; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | static |
| 585 | void OutEdgeArr__deleteIndex ( OutEdgeArr* oea, UWord i ) |
| 586 | { |
| 587 | if (oea->var) { |
| 588 | vg_assert(oea->n_fixed == 0); |
| 589 | VG_(removeIndexXA)(oea->var, i); |
| 590 | } else { |
| 591 | vg_assert(i < oea->n_fixed); |
| 592 | for (; i+1 < oea->n_fixed; i++) { |
| 593 | oea->fixed[i] = oea->fixed[i+1]; |
| 594 | } |
| 595 | oea->n_fixed--; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | static |
| 600 | void OutEdgeArr__add ( OutEdgeArr* oea, OutEdge* oe ) |
| 601 | { |
| 602 | if (oea->var) { |
| 603 | vg_assert(oea->n_fixed == 0); |
| 604 | VG_(addToXA)(oea->var, oe); |
| 605 | } else { |
| 606 | vg_assert(oea->n_fixed <= N_FIXED_OUT_EDGE_ARR); |
| 607 | if (oea->n_fixed == N_FIXED_OUT_EDGE_ARR) { |
| 608 | /* The fixed array is full, so we have to initialise an |
| 609 | XArray and copy the fixed array into it. */ |
| 610 | oea->var = VG_(newXA)(ttaux_malloc, "transtab.OEA__add", |
| 611 | ttaux_free, |
| 612 | sizeof(OutEdge)); |
| 613 | UWord i; |
| 614 | for (i = 0; i < oea->n_fixed; i++) { |
| 615 | VG_(addToXA)(oea->var, &oea->fixed[i]); |
| 616 | } |
| 617 | VG_(addToXA)(oea->var, oe); |
| 618 | oea->n_fixed = 0; |
| 619 | } else { |
| 620 | /* Just add to the fixed array. */ |
| 621 | oea->fixed[oea->n_fixed++] = *oe; |
| 622 | } |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | static |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 627 | Int HostExtent__cmpOrd ( const void* v1, const void* v2 ) |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 628 | { |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 629 | const HostExtent* hx1 = v1; |
| 630 | const HostExtent* hx2 = v2; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 631 | if (hx1->start + hx1->len <= hx2->start) return -1; |
| 632 | if (hx2->start + hx2->len <= hx1->start) return 1; |
| 633 | return 0; /* partial overlap */ |
| 634 | } |
| 635 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 636 | /* True if hx is a dead host extent, i.e. corresponds to host code |
| 637 | of an entry that was invalidated. */ |
| 638 | static |
| 639 | Bool HostExtent__is_dead (const HostExtent* hx, const Sector* sec) |
| 640 | { |
| 641 | const UInt tteNo = hx->tteNo; |
| 642 | #define LDEBUG(m) if (DEBUG_TRANSTAB) \ |
| 643 | VG_(printf) (m \ |
| 644 | " start 0x%p len %u sector %d ttslot %u" \ |
| 645 | " tt.entry 0x%llu tt.tcptr 0x%p\n", \ |
| 646 | hx->start, hx->len, (int)(sec - sectors), \ |
| 647 | hx->tteNo, \ |
| 648 | sec->tt[tteNo].entry, sec->tt[tteNo].tcptr) |
| 649 | |
| 650 | /* Entry might have been invalidated and not re-used yet.*/ |
| 651 | if (sec->tt[tteNo].status == Deleted) { |
| 652 | LDEBUG("found deleted entry"); |
| 653 | return True; |
| 654 | } |
| 655 | /* Maybe we found this entry via a host_extents which was |
| 656 | inserted for an entry which was changed to Deleted then |
| 657 | re-used after. If this entry was re-used, then its tcptr |
| 658 | is >= to host_extents start (i.e. the previous tcptr) + len. |
| 659 | This is the case as there is no re-use of host code: a new |
| 660 | entry or re-used entry always gets "higher value" host code. */ |
| 661 | if ((UChar*) sec->tt[tteNo].tcptr >= hx->start + hx->len) { |
| 662 | LDEBUG("found re-used entry"); |
| 663 | return True; |
| 664 | } |
| 665 | |
| 666 | return False; |
| 667 | #undef LDEBUG |
| 668 | } |
| 669 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 670 | static __attribute__((noinline)) |
| 671 | Bool find_TTEntry_from_hcode( /*OUT*/UInt* from_sNo, |
| 672 | /*OUT*/UInt* from_tteNo, |
| 673 | void* hcode ) |
| 674 | { |
| 675 | Int i; |
| 676 | |
| 677 | /* Search order logic copied from VG_(search_transtab). */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 678 | for (i = 0; i < n_sectors; i++) { |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 679 | Int sno = sector_search_order[i]; |
| 680 | if (UNLIKELY(sno == -1)) |
| 681 | return False; /* run out of sectors to search */ |
| 682 | |
| 683 | Sector* sec = §ors[sno]; |
| 684 | XArray* /* of HostExtent */ host_extents = sec->host_extents; |
| 685 | vg_assert(host_extents); |
| 686 | |
| 687 | HostExtent key; |
| 688 | VG_(memset)(&key, 0, sizeof(key)); |
| 689 | key.start = hcode; |
| 690 | key.len = 1; |
| 691 | Word firstW = -1, lastW = -1; |
| 692 | Bool found = VG_(lookupXA_UNSAFE)( |
| 693 | host_extents, &key, &firstW, &lastW, |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 694 | HostExtent__cmpOrd ); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 695 | vg_assert(firstW == lastW); // always true, even if not found |
| 696 | if (found) { |
| 697 | HostExtent* hx = VG_(indexXA)(host_extents, firstW); |
| 698 | UInt tteNo = hx->tteNo; |
| 699 | /* Do some additional sanity checks. */ |
| 700 | vg_assert(tteNo <= N_TTES_PER_SECTOR); |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 701 | |
| 702 | /* if this hx entry corresponds to dead host code, we must |
| 703 | tell this code has not been found, as it cannot be patched. */ |
| 704 | if (HostExtent__is_dead (hx, sec)) |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 705 | return False; |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 706 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 707 | vg_assert(sec->tt[tteNo].status == InUse); |
| 708 | /* Can only half check that the found TTEntry contains hcode, |
| 709 | due to not having a length value for the hcode in the |
| 710 | TTEntry. */ |
| 711 | vg_assert((UChar*)sec->tt[tteNo].tcptr <= (UChar*)hcode); |
| 712 | /* Looks plausible */ |
| 713 | *from_sNo = sno; |
| 714 | *from_tteNo = (UInt)tteNo; |
| 715 | return True; |
| 716 | } |
| 717 | } |
| 718 | return False; |
| 719 | } |
| 720 | |
| 721 | |
| 722 | /* Figure out whether or not hcode is jitted code present in the main |
| 723 | code cache (but not in the no-redir cache). Used for sanity |
| 724 | checking. */ |
| 725 | static Bool is_in_the_main_TC ( void* hcode ) |
| 726 | { |
| 727 | Int i, sno; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 728 | for (i = 0; i < n_sectors; i++) { |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 729 | sno = sector_search_order[i]; |
| 730 | if (sno == -1) |
| 731 | break; /* run out of sectors to search */ |
| 732 | if ((UChar*)hcode >= (UChar*)sectors[sno].tc |
| 733 | && (UChar*)hcode <= (UChar*)sectors[sno].tc_next |
| 734 | + sizeof(ULong) - 1) |
| 735 | return True; |
| 736 | } |
| 737 | return False; |
| 738 | } |
| 739 | |
| 740 | |
| 741 | /* Fulfill a chaining request, and record admin info so we |
| 742 | can undo it later, if required. |
| 743 | */ |
| 744 | void VG_(tt_tc_do_chaining) ( void* from__patch_addr, |
| 745 | UInt to_sNo, |
| 746 | UInt to_tteNo, |
| 747 | Bool to_fastEP ) |
| 748 | { |
| 749 | /* Get the CPU info established at startup. */ |
| 750 | VexArch vex_arch = VexArch_INVALID; |
| 751 | VG_(machine_get_VexArchInfo)( &vex_arch, NULL ); |
| 752 | |
| 753 | // host_code is where we're patching to. So it needs to |
| 754 | // take into account, whether we're jumping to the slow |
| 755 | // or fast entry point. By definition, the fast entry point |
| 756 | // is exactly one event check's worth of code along from |
| 757 | // the slow (tcptr) entry point. |
| 758 | TTEntry* to_tte = index_tte(to_sNo, to_tteNo); |
| 759 | void* host_code = ((UChar*)to_tte->tcptr) |
| 760 | + (to_fastEP ? LibVEX_evCheckSzB(vex_arch) : 0); |
| 761 | |
| 762 | // stay sane -- the patch point (dst) is in this sector's code cache |
| 763 | vg_assert( (UChar*)host_code >= (UChar*)sectors[to_sNo].tc ); |
| 764 | vg_assert( (UChar*)host_code <= (UChar*)sectors[to_sNo].tc_next |
| 765 | + sizeof(ULong) - 1 ); |
| 766 | |
| 767 | /* Find the TTEntry for the from__ code. This isn't simple since |
| 768 | we only know the patch address, which is going to be somewhere |
| 769 | inside the from_ block. */ |
| 770 | UInt from_sNo = (UInt)-1; |
| 771 | UInt from_tteNo = (UInt)-1; |
| 772 | Bool from_found |
| 773 | = find_TTEntry_from_hcode( &from_sNo, &from_tteNo, |
| 774 | from__patch_addr ); |
| 775 | if (!from_found) { |
| 776 | // The from code might have been discarded due to sector re-use |
| 777 | // or marked Deleted due to translation invalidation. |
| 778 | // In such a case, don't do the chaining. |
| 779 | VG_(debugLog)(1,"transtab", |
| 780 | "host code %p not found (discarded? sector recycled?)" |
| 781 | " => no chaining done\n", |
| 782 | from__patch_addr); |
| 783 | return; |
| 784 | } |
| 785 | |
| 786 | TTEntry* from_tte = index_tte(from_sNo, from_tteNo); |
| 787 | |
| 788 | /* Get VEX to do the patching itself. We have to hand it off |
| 789 | since it is host-dependent. */ |
| 790 | VexInvalRange vir |
| 791 | = LibVEX_Chain( |
| 792 | vex_arch, |
| 793 | from__patch_addr, |
| 794 | VG_(fnptr_to_fnentry)( |
| 795 | to_fastEP ? &VG_(disp_cp_chain_me_to_fastEP) |
| 796 | : &VG_(disp_cp_chain_me_to_slowEP)), |
| 797 | (void*)host_code |
| 798 | ); |
| 799 | VG_(invalidate_icache)( (void*)vir.start, vir.len ); |
| 800 | |
| 801 | /* Now do the tricky bit -- update the ch_succs and ch_preds info |
| 802 | for the two translations involved, so we can undo the chaining |
| 803 | later, which we will have to do if the to_ block gets removed |
| 804 | for whatever reason. */ |
| 805 | |
| 806 | /* This is the new from_ -> to_ link to add. */ |
| 807 | InEdge ie; |
| 808 | InEdge__init(&ie); |
| 809 | ie.from_sNo = from_sNo; |
| 810 | ie.from_tteNo = from_tteNo; |
| 811 | ie.to_fastEP = to_fastEP; |
| 812 | HWord from_offs = (HWord)( (UChar*)from__patch_addr |
| 813 | - (UChar*)from_tte->tcptr ); |
| 814 | vg_assert(from_offs < 100000/* let's say */); |
| 815 | ie.from_offs = (UInt)from_offs; |
| 816 | |
| 817 | /* This is the new to_ -> from_ backlink to add. */ |
| 818 | OutEdge oe; |
| 819 | OutEdge__init(&oe); |
| 820 | oe.to_sNo = to_sNo; |
| 821 | oe.to_tteNo = to_tteNo; |
| 822 | oe.from_offs = (UInt)from_offs; |
| 823 | |
| 824 | /* Add .. */ |
| 825 | InEdgeArr__add(&to_tte->in_edges, &ie); |
| 826 | OutEdgeArr__add(&from_tte->out_edges, &oe); |
| 827 | } |
| 828 | |
| 829 | |
| 830 | /* Unchain one patch, as described by the specified InEdge. For |
| 831 | sanity check purposes only (to check that the patched location is |
| 832 | as expected) it also requires the fast and slow entry point |
| 833 | addresses of the destination block (that is, the block that owns |
| 834 | this InEdge). */ |
| 835 | __attribute__((noinline)) |
| 836 | static void unchain_one ( VexArch vex_arch, |
| 837 | InEdge* ie, |
| 838 | void* to_fastEPaddr, void* to_slowEPaddr ) |
| 839 | { |
| 840 | vg_assert(ie); |
| 841 | TTEntry* tte |
| 842 | = index_tte(ie->from_sNo, ie->from_tteNo); |
| 843 | UChar* place_to_patch |
florian | 19f91bb | 2012-11-10 22:29:54 +0000 | [diff] [blame] | 844 | = ((UChar*)tte->tcptr) + ie->from_offs; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 845 | UChar* disp_cp_chain_me |
| 846 | = VG_(fnptr_to_fnentry)( |
| 847 | ie->to_fastEP ? &VG_(disp_cp_chain_me_to_fastEP) |
| 848 | : &VG_(disp_cp_chain_me_to_slowEP) |
| 849 | ); |
| 850 | UChar* place_to_jump_to_EXPECTED |
| 851 | = ie->to_fastEP ? to_fastEPaddr : to_slowEPaddr; |
| 852 | |
| 853 | // stay sane: both src and dst for this unchaining are |
| 854 | // in the main code cache |
| 855 | vg_assert( is_in_the_main_TC(place_to_patch) ); // src |
| 856 | vg_assert( is_in_the_main_TC(place_to_jump_to_EXPECTED) ); // dst |
| 857 | // dst check is ok because LibVEX_UnChain checks that |
| 858 | // place_to_jump_to_EXPECTED really is the current dst, and |
| 859 | // asserts if it isn't. |
| 860 | VexInvalRange vir |
| 861 | = LibVEX_UnChain( vex_arch, place_to_patch, |
| 862 | place_to_jump_to_EXPECTED, disp_cp_chain_me ); |
| 863 | VG_(invalidate_icache)( (void*)vir.start, vir.len ); |
| 864 | } |
| 865 | |
| 866 | |
| 867 | /* The specified block is about to be deleted. Update the preds and |
| 868 | succs of its associated blocks accordingly. This includes undoing |
| 869 | any chained jumps to this block. */ |
| 870 | static |
| 871 | void unchain_in_preparation_for_deletion ( VexArch vex_arch, |
| 872 | UInt here_sNo, UInt here_tteNo ) |
| 873 | { |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 874 | if (DEBUG_TRANSTAB) |
| 875 | VG_(printf)("QQQ unchain_in_prep %u.%u...\n", here_sNo, here_tteNo); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 876 | UWord i, j, n, m; |
| 877 | Int evCheckSzB = LibVEX_evCheckSzB(vex_arch); |
| 878 | TTEntry* here_tte = index_tte(here_sNo, here_tteNo); |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 879 | if (DEBUG_TRANSTAB) |
| 880 | VG_(printf)("... QQQ tt.entry 0x%llu tt.tcptr 0x%p\n", |
| 881 | here_tte->entry, here_tte->tcptr); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 882 | vg_assert(here_tte->status == InUse); |
| 883 | |
| 884 | /* Visit all InEdges owned by here_tte. */ |
| 885 | n = InEdgeArr__size(&here_tte->in_edges); |
| 886 | for (i = 0; i < n; i++) { |
| 887 | InEdge* ie = InEdgeArr__index(&here_tte->in_edges, i); |
| 888 | // Undo the chaining. |
| 889 | UChar* here_slow_EP = (UChar*)here_tte->tcptr; |
| 890 | UChar* here_fast_EP = here_slow_EP + evCheckSzB; |
| 891 | unchain_one(vex_arch, ie, here_fast_EP, here_slow_EP); |
| 892 | // Find the corresponding entry in the "from" node's out_edges, |
| 893 | // and remove it. |
| 894 | TTEntry* from_tte = index_tte(ie->from_sNo, ie->from_tteNo); |
| 895 | m = OutEdgeArr__size(&from_tte->out_edges); |
| 896 | vg_assert(m > 0); // it must have at least one entry |
| 897 | for (j = 0; j < m; j++) { |
| 898 | OutEdge* oe = OutEdgeArr__index(&from_tte->out_edges, j); |
| 899 | if (oe->to_sNo == here_sNo && oe->to_tteNo == here_tteNo |
| 900 | && oe->from_offs == ie->from_offs) |
| 901 | break; |
| 902 | } |
| 903 | vg_assert(j < m); // "oe must be findable" |
| 904 | OutEdgeArr__deleteIndex(&from_tte->out_edges, j); |
| 905 | } |
| 906 | |
| 907 | /* Visit all OutEdges owned by here_tte. */ |
| 908 | n = OutEdgeArr__size(&here_tte->out_edges); |
| 909 | for (i = 0; i < n; i++) { |
| 910 | OutEdge* oe = OutEdgeArr__index(&here_tte->out_edges, i); |
| 911 | // Find the corresponding entry in the "to" node's in_edges, |
| 912 | // and remove it. |
| 913 | TTEntry* to_tte = index_tte(oe->to_sNo, oe->to_tteNo); |
| 914 | m = InEdgeArr__size(&to_tte->in_edges); |
| 915 | vg_assert(m > 0); // it must have at least one entry |
| 916 | for (j = 0; j < m; j++) { |
| 917 | InEdge* ie = InEdgeArr__index(&to_tte->in_edges, j); |
| 918 | if (ie->from_sNo == here_sNo && ie->from_tteNo == here_tteNo |
| 919 | && ie->from_offs == oe->from_offs) |
| 920 | break; |
| 921 | } |
| 922 | vg_assert(j < m); // "ie must be findable" |
| 923 | InEdgeArr__deleteIndex(&to_tte->in_edges, j); |
| 924 | } |
| 925 | |
| 926 | InEdgeArr__makeEmpty(&here_tte->in_edges); |
| 927 | OutEdgeArr__makeEmpty(&here_tte->out_edges); |
| 928 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 929 | |
| 930 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 931 | /*-------------------------------------------------------------*/ |
| 932 | /*--- Address-range equivalence class stuff ---*/ |
| 933 | /*-------------------------------------------------------------*/ |
| 934 | |
| 935 | /* Return equivalence class number for a range. */ |
| 936 | |
| 937 | static Int range_to_eclass ( Addr64 start, UInt len ) |
| 938 | { |
| 939 | UInt mask = (1 << ECLASS_WIDTH) - 1; |
| 940 | UInt lo = (UInt)start; |
| 941 | UInt hi = lo + len - 1; |
| 942 | UInt loBits = (lo >> ECLASS_SHIFT) & mask; |
| 943 | UInt hiBits = (hi >> ECLASS_SHIFT) & mask; |
| 944 | if (loBits == hiBits) { |
| 945 | vg_assert(loBits < ECLASS_N-1); |
| 946 | return loBits; |
| 947 | } else { |
| 948 | return ECLASS_MISC; |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | |
| 953 | /* Calculates the equivalence class numbers for any VexGuestExtent. |
| 954 | These are written in *eclasses, which must be big enough to hold 3 |
| 955 | Ints. The number written, between 1 and 3, is returned. The |
| 956 | eclasses are presented in order, and any duplicates are removed. |
| 957 | */ |
| 958 | |
| 959 | static |
| 960 | Int vexGuestExtents_to_eclasses ( /*OUT*/Int* eclasses, |
| 961 | VexGuestExtents* vge ) |
| 962 | { |
| 963 | # define SWAP(_lv1,_lv2) \ |
| 964 | do { Int t = _lv1; _lv1 = _lv2; _lv2 = t; } while (0) |
| 965 | |
| 966 | Int i, j, n_ec, r; |
| 967 | |
| 968 | vg_assert(vge->n_used >= 1 && vge->n_used <= 3); |
| 969 | |
| 970 | n_ec = 0; |
| 971 | for (i = 0; i < vge->n_used; i++) { |
| 972 | r = range_to_eclass( vge->base[i], (UInt)vge->len[i] ); |
| 973 | if (r == ECLASS_MISC) |
| 974 | goto bad; |
| 975 | /* only add if we haven't already seen it */ |
| 976 | for (j = 0; j < n_ec; j++) |
| 977 | if (eclasses[j] == r) |
| 978 | break; |
| 979 | if (j == n_ec) |
| 980 | eclasses[n_ec++] = r; |
| 981 | } |
| 982 | |
| 983 | if (n_ec == 1) |
| 984 | return 1; |
| 985 | |
| 986 | if (n_ec == 2) { |
| 987 | /* sort */ |
| 988 | if (eclasses[0] > eclasses[1]) |
| 989 | SWAP(eclasses[0], eclasses[1]); |
| 990 | return 2; |
| 991 | } |
| 992 | |
| 993 | if (n_ec == 3) { |
| 994 | /* sort */ |
| 995 | if (eclasses[0] > eclasses[2]) |
| 996 | SWAP(eclasses[0], eclasses[2]); |
| 997 | if (eclasses[0] > eclasses[1]) |
| 998 | SWAP(eclasses[0], eclasses[1]); |
| 999 | if (eclasses[1] > eclasses[2]) |
| 1000 | SWAP(eclasses[1], eclasses[2]); |
| 1001 | return 3; |
| 1002 | } |
| 1003 | |
| 1004 | /* NOTREACHED */ |
| 1005 | vg_assert(0); |
| 1006 | |
| 1007 | bad: |
| 1008 | eclasses[0] = ECLASS_MISC; |
| 1009 | return 1; |
| 1010 | |
| 1011 | # undef SWAP |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | /* Add tteno to the set of entries listed for equivalence class ec in |
| 1016 | this sector. Returns used location in eclass array. */ |
| 1017 | |
| 1018 | static |
| 1019 | UInt addEClassNo ( /*MOD*/Sector* sec, Int ec, UShort tteno ) |
| 1020 | { |
| 1021 | Int old_sz, new_sz, i, r; |
| 1022 | UShort *old_ar, *new_ar; |
| 1023 | |
| 1024 | vg_assert(ec >= 0 && ec < ECLASS_N); |
| 1025 | vg_assert(tteno < N_TTES_PER_SECTOR); |
| 1026 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1027 | if (DEBUG_TRANSTAB) VG_(printf)("ec %d gets %d\n", ec, (Int)tteno); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1028 | |
| 1029 | if (sec->ec2tte_used[ec] >= sec->ec2tte_size[ec]) { |
| 1030 | |
| 1031 | vg_assert(sec->ec2tte_used[ec] == sec->ec2tte_size[ec]); |
| 1032 | |
| 1033 | old_sz = sec->ec2tte_size[ec]; |
| 1034 | old_ar = sec->ec2tte[ec]; |
| 1035 | new_sz = old_sz==0 ? 8 : old_sz<64 ? 2*old_sz : (3*old_sz)/2; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1036 | new_ar = ttaux_malloc("transtab.aECN.1", |
| 1037 | new_sz * sizeof(UShort)); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1038 | for (i = 0; i < old_sz; i++) |
| 1039 | new_ar[i] = old_ar[i]; |
| 1040 | if (old_ar) |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1041 | ttaux_free(old_ar); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1042 | sec->ec2tte_size[ec] = new_sz; |
| 1043 | sec->ec2tte[ec] = new_ar; |
| 1044 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1045 | if (DEBUG_TRANSTAB) VG_(printf)("expand ec %d to %d\n", ec, new_sz); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | /* Common case */ |
| 1049 | r = sec->ec2tte_used[ec]++; |
| 1050 | vg_assert(r >= 0 && r < sec->ec2tte_size[ec]); |
| 1051 | sec->ec2tte[ec][r] = tteno; |
| 1052 | return (UInt)r; |
| 1053 | } |
| 1054 | |
| 1055 | |
| 1056 | /* 'vge' is being added to 'sec' at TT entry 'tteno'. Add appropriate |
| 1057 | eclass entries to 'sec'. */ |
| 1058 | |
| 1059 | static |
| 1060 | void upd_eclasses_after_add ( /*MOD*/Sector* sec, Int tteno ) |
| 1061 | { |
| 1062 | Int i, r, eclasses[3]; |
| 1063 | TTEntry* tte; |
| 1064 | vg_assert(tteno >= 0 && tteno < N_TTES_PER_SECTOR); |
| 1065 | |
| 1066 | tte = &sec->tt[tteno]; |
| 1067 | r = vexGuestExtents_to_eclasses( eclasses, &tte->vge ); |
| 1068 | |
| 1069 | vg_assert(r >= 1 && r <= 3); |
| 1070 | tte->n_tte2ec = r; |
| 1071 | |
| 1072 | for (i = 0; i < r; i++) { |
| 1073 | tte->tte2ec_ec[i] = eclasses[i]; |
| 1074 | tte->tte2ec_ix[i] = addEClassNo( sec, eclasses[i], (UShort)tteno ); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | /* Check the eclass info in 'sec' to ensure it is consistent. Returns |
| 1080 | True if OK, False if something's not right. Expensive. */ |
| 1081 | |
| 1082 | static Bool sanity_check_eclasses_in_sector ( Sector* sec ) |
| 1083 | { |
| 1084 | # define BAD(_str) do { whassup = (_str); goto bad; } while (0) |
| 1085 | |
florian | 6bd9dc1 | 2012-11-23 16:17:43 +0000 | [diff] [blame] | 1086 | const HChar* whassup = NULL; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1087 | Int i, j, k, n, ec_num, ec_idx; |
| 1088 | TTEntry* tte; |
| 1089 | UShort tteno; |
| 1090 | ULong* tce; |
| 1091 | |
| 1092 | /* Basic checks on this sector */ |
| 1093 | if (sec->tt_n_inuse < 0 || sec->tt_n_inuse > N_TTES_PER_SECTOR_USABLE) |
| 1094 | BAD("invalid sec->tt_n_inuse"); |
| 1095 | tce = sec->tc_next; |
| 1096 | if (tce < &sec->tc[0] || tce > &sec->tc[tc_sector_szQ]) |
| 1097 | BAD("sec->tc_next points outside tc"); |
| 1098 | |
| 1099 | /* For each eclass ... */ |
| 1100 | for (i = 0; i < ECLASS_N; i++) { |
| 1101 | if (sec->ec2tte_size[i] == 0 && sec->ec2tte[i] != NULL) |
| 1102 | BAD("ec2tte_size/ec2tte mismatch(1)"); |
| 1103 | if (sec->ec2tte_size[i] != 0 && sec->ec2tte[i] == NULL) |
| 1104 | BAD("ec2tte_size/ec2tte mismatch(2)"); |
| 1105 | if (sec->ec2tte_used[i] < 0 |
| 1106 | || sec->ec2tte_used[i] > sec->ec2tte_size[i]) |
| 1107 | BAD("implausible ec2tte_used"); |
| 1108 | if (sec->ec2tte_used[i] == 0) |
| 1109 | continue; |
| 1110 | |
| 1111 | /* For each tt reference in each eclass .. ensure the reference |
| 1112 | is to a valid tt entry, and that the entry's address ranges |
| 1113 | really include this eclass. */ |
| 1114 | |
| 1115 | for (j = 0; j < sec->ec2tte_used[i]; j++) { |
| 1116 | tteno = sec->ec2tte[i][j]; |
| 1117 | if (tteno == EC2TTE_DELETED) |
| 1118 | continue; |
| 1119 | if (tteno >= N_TTES_PER_SECTOR) |
| 1120 | BAD("implausible tteno"); |
| 1121 | tte = &sec->tt[tteno]; |
| 1122 | if (tte->status != InUse) |
| 1123 | BAD("tteno points to non-inuse tte"); |
| 1124 | if (tte->n_tte2ec < 1 || tte->n_tte2ec > 3) |
| 1125 | BAD("tte->n_tte2ec out of range"); |
| 1126 | /* Exactly least one of tte->eclasses[0 .. tte->n_eclasses-1] |
| 1127 | must equal i. Inspect tte's eclass info. */ |
| 1128 | n = 0; |
| 1129 | for (k = 0; k < tte->n_tte2ec; k++) { |
| 1130 | if (k < tte->n_tte2ec-1 |
| 1131 | && tte->tte2ec_ec[k] >= tte->tte2ec_ec[k+1]) |
| 1132 | BAD("tte->tte2ec_ec[..] out of order"); |
| 1133 | ec_num = tte->tte2ec_ec[k]; |
| 1134 | if (ec_num < 0 || ec_num >= ECLASS_N) |
| 1135 | BAD("tte->tte2ec_ec[..] out of range"); |
| 1136 | if (ec_num != i) |
| 1137 | continue; |
| 1138 | ec_idx = tte->tte2ec_ix[k]; |
| 1139 | if (ec_idx < 0 || ec_idx >= sec->ec2tte_used[i]) |
| 1140 | BAD("tte->tte2ec_ix[..] out of range"); |
| 1141 | if (ec_idx == j) |
| 1142 | n++; |
| 1143 | } |
| 1144 | if (n != 1) |
| 1145 | BAD("tteno does not point back at eclass"); |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | /* That establishes that for each forward pointer from TTEntrys |
| 1150 | there is a corresponding backward pointer from the eclass[] |
| 1151 | arrays. However, it doesn't rule out the possibility of other, |
| 1152 | bogus pointers in the eclass[] arrays. So do those similarly: |
| 1153 | scan through them and check the TTEntryies they point at point |
| 1154 | back. */ |
| 1155 | |
| 1156 | for (i = 0; i < N_TTES_PER_SECTOR_USABLE; i++) { |
| 1157 | |
| 1158 | tte = &sec->tt[i]; |
| 1159 | if (tte->status == Empty || tte->status == Deleted) { |
| 1160 | if (tte->n_tte2ec != 0) |
| 1161 | BAD("tte->n_eclasses nonzero for unused tte"); |
| 1162 | continue; |
| 1163 | } |
| 1164 | |
| 1165 | vg_assert(tte->status == InUse); |
| 1166 | |
| 1167 | if (tte->n_tte2ec < 1 || tte->n_tte2ec > 3) |
| 1168 | BAD("tte->n_eclasses out of range(2)"); |
| 1169 | |
| 1170 | for (j = 0; j < tte->n_tte2ec; j++) { |
| 1171 | ec_num = tte->tte2ec_ec[j]; |
| 1172 | if (ec_num < 0 || ec_num >= ECLASS_N) |
| 1173 | BAD("tte->eclass[..] out of range"); |
| 1174 | ec_idx = tte->tte2ec_ix[j]; |
| 1175 | if (ec_idx < 0 || ec_idx >= sec->ec2tte_used[ec_num]) |
| 1176 | BAD("tte->ec_idx[..] out of range(2)"); |
| 1177 | if (sec->ec2tte[ec_num][ec_idx] != i) |
| 1178 | BAD("ec2tte does not point back to tte"); |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | return True; |
| 1183 | |
| 1184 | bad: |
| 1185 | if (whassup) |
| 1186 | VG_(debugLog)(0, "transtab", "eclass sanity fail: %s\n", whassup); |
| 1187 | |
| 1188 | # if 0 |
| 1189 | VG_(printf)("eclass = %d\n", i); |
| 1190 | VG_(printf)("tteno = %d\n", (Int)tteno); |
| 1191 | switch (tte->status) { |
| 1192 | case InUse: VG_(printf)("InUse\n"); break; |
| 1193 | case Deleted: VG_(printf)("Deleted\n"); break; |
| 1194 | case Empty: VG_(printf)("Empty\n"); break; |
| 1195 | } |
| 1196 | if (tte->status != Empty) { |
| 1197 | for (k = 0; k < tte->vge.n_used; k++) |
| 1198 | VG_(printf)("0x%llx %d\n", tte->vge.base[k], |
| 1199 | (Int)tte->vge.len[k]); |
| 1200 | } |
| 1201 | # endif |
| 1202 | |
| 1203 | return False; |
| 1204 | |
| 1205 | # undef BAD |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | /* Sanity check absolutely everything. True == check passed. */ |
| 1210 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1211 | /* forwards */ |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 1212 | static Bool sanity_check_redir_tt_tc ( void ); |
| 1213 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1214 | static Bool sanity_check_sector_search_order ( void ) |
| 1215 | { |
| 1216 | Int i, j, nListed; |
| 1217 | /* assert the array is the right size */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1218 | vg_assert(MAX_N_SECTORS == (sizeof(sector_search_order) |
| 1219 | / sizeof(sector_search_order[0]))); |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1220 | /* Check it's of the form valid_sector_numbers ++ [-1, -1, ..] */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1221 | for (i = 0; i < n_sectors; i++) { |
| 1222 | if (sector_search_order[i] < 0 || sector_search_order[i] >= n_sectors) |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1223 | break; |
| 1224 | } |
| 1225 | nListed = i; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1226 | for (/* */; i < n_sectors; i++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1227 | if (sector_search_order[i] != -1) |
| 1228 | break; |
| 1229 | } |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1230 | if (i != n_sectors) |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1231 | return False; |
| 1232 | /* Check each sector number only appears once */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1233 | for (i = 0; i < n_sectors; i++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1234 | if (sector_search_order[i] == -1) |
| 1235 | continue; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1236 | for (j = i+1; j < n_sectors; j++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1237 | if (sector_search_order[j] == sector_search_order[i]) |
| 1238 | return False; |
| 1239 | } |
| 1240 | } |
| 1241 | /* Check that the number of listed sectors equals the number |
| 1242 | in use, by counting nListed back down. */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1243 | for (i = 0; i < n_sectors; i++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1244 | if (sectors[i].tc != NULL) |
| 1245 | nListed--; |
| 1246 | } |
| 1247 | if (nListed != 0) |
| 1248 | return False; |
| 1249 | return True; |
| 1250 | } |
| 1251 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1252 | static Bool sanity_check_all_sectors ( void ) |
| 1253 | { |
| 1254 | Int sno; |
| 1255 | Bool sane; |
| 1256 | Sector* sec; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1257 | for (sno = 0; sno < n_sectors; sno++) { |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1258 | Int i; |
| 1259 | Int nr_not_dead_hx = 0; |
| 1260 | Int szhxa; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1261 | sec = §ors[sno]; |
| 1262 | if (sec->tc == NULL) |
| 1263 | continue; |
| 1264 | sane = sanity_check_eclasses_in_sector( sec ); |
| 1265 | if (!sane) |
| 1266 | return False; |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1267 | szhxa = VG_(sizeXA)(sec->host_extents); |
| 1268 | for (i = 0; i < szhxa; i++) { |
| 1269 | const HostExtent* hx = VG_(indexXA)(sec->host_extents, i); |
| 1270 | if (!HostExtent__is_dead (hx, sec)) |
| 1271 | nr_not_dead_hx++; |
| 1272 | } |
| 1273 | if (nr_not_dead_hx != sec->tt_n_inuse) { |
| 1274 | VG_(debugLog)(0, "transtab", |
| 1275 | "nr_not_dead_hx %d sanity fail (expected == in use %d)\n", |
| 1276 | nr_not_dead_hx, sec->tt_n_inuse); |
| 1277 | return False; |
| 1278 | } |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1279 | } |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1280 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1281 | if ( !sanity_check_redir_tt_tc() ) |
| 1282 | return False; |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1283 | if ( !sanity_check_sector_search_order() ) |
| 1284 | return False; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1285 | return True; |
| 1286 | } |
| 1287 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1288 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1289 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1290 | /*-------------------------------------------------------------*/ |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1291 | /*--- Add/find translations ---*/ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1292 | /*-------------------------------------------------------------*/ |
| 1293 | |
| 1294 | static UInt vge_osize ( VexGuestExtents* vge ) |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 1295 | { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1296 | UInt i, n = 0; |
| 1297 | for (i = 0; i < vge->n_used; i++) |
| 1298 | n += (UInt)vge->len[i]; |
| 1299 | return n; |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 1300 | } |
| 1301 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1302 | static Bool isValidSector ( Int sector ) |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1303 | { |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1304 | if (sector < 0 || sector >= n_sectors) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1305 | return False; |
| 1306 | return True; |
| 1307 | } |
| 1308 | |
| 1309 | static inline UInt HASH_TT ( Addr64 key ) |
| 1310 | { |
| 1311 | UInt kHi = (UInt)(key >> 32); |
| 1312 | UInt kLo = (UInt)key; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1313 | UInt k32 = kHi ^ kLo; |
| 1314 | UInt ror = 7; |
| 1315 | if (ror > 0) |
| 1316 | k32 = (k32 >> ror) | (k32 << (32-ror)); |
| 1317 | return k32 % N_TTES_PER_SECTOR; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1318 | } |
| 1319 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1320 | static void setFastCacheEntry ( Addr64 key, ULong* tcptr ) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1321 | { |
sewardj | 3387dda | 2005-12-26 17:58:58 +0000 | [diff] [blame] | 1322 | UInt cno = (UInt)VG_TT_FAST_HASH(key); |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1323 | VG_(tt_fast)[cno].guest = (Addr)key; |
| 1324 | VG_(tt_fast)[cno].host = (Addr)tcptr; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1325 | n_fast_updates++; |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1326 | /* This shouldn't fail. It should be assured by m_translate |
| 1327 | which should reject any attempt to make translation of code |
| 1328 | starting at TRANSTAB_BOGUS_GUEST_ADDR. */ |
| 1329 | vg_assert(VG_(tt_fast)[cno].guest != TRANSTAB_BOGUS_GUEST_ADDR); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1332 | /* Invalidate the fast cache VG_(tt_fast). */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1333 | static void invalidateFastCache ( void ) |
| 1334 | { |
| 1335 | UInt j; |
sewardj | 65e1939 | 2005-10-19 01:32:41 +0000 | [diff] [blame] | 1336 | /* This loop is popular enough to make it worth unrolling a |
| 1337 | bit, at least on ppc32. */ |
| 1338 | vg_assert(VG_TT_FAST_SIZE > 0 && (VG_TT_FAST_SIZE % 4) == 0); |
| 1339 | for (j = 0; j < VG_TT_FAST_SIZE; j += 4) { |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1340 | VG_(tt_fast)[j+0].guest = TRANSTAB_BOGUS_GUEST_ADDR; |
| 1341 | VG_(tt_fast)[j+1].guest = TRANSTAB_BOGUS_GUEST_ADDR; |
| 1342 | VG_(tt_fast)[j+2].guest = TRANSTAB_BOGUS_GUEST_ADDR; |
| 1343 | VG_(tt_fast)[j+3].guest = TRANSTAB_BOGUS_GUEST_ADDR; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1344 | } |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1345 | |
sewardj | 65e1939 | 2005-10-19 01:32:41 +0000 | [diff] [blame] | 1346 | vg_assert(j == VG_TT_FAST_SIZE); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1347 | n_fast_flushes++; |
| 1348 | } |
| 1349 | |
| 1350 | static void initialiseSector ( Int sno ) |
| 1351 | { |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1352 | Int i; |
| 1353 | SysRes sres; |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1354 | Sector* sec; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1355 | vg_assert(isValidSector(sno)); |
| 1356 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1357 | { Bool sane = sanity_check_sector_search_order(); |
| 1358 | vg_assert(sane); |
| 1359 | } |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1360 | sec = §ors[sno]; |
| 1361 | |
| 1362 | if (sec->tc == NULL) { |
| 1363 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1364 | /* Sector has never been used before. Need to allocate tt and |
| 1365 | tc. */ |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1366 | vg_assert(sec->tt == NULL); |
| 1367 | vg_assert(sec->tc_next == NULL); |
| 1368 | vg_assert(sec->tt_n_inuse == 0); |
| 1369 | for (i = 0; i < ECLASS_N; i++) { |
| 1370 | vg_assert(sec->ec2tte_size[i] == 0); |
| 1371 | vg_assert(sec->ec2tte_used[i] == 0); |
| 1372 | vg_assert(sec->ec2tte[i] == NULL); |
| 1373 | } |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1374 | vg_assert(sec->host_extents == NULL); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1375 | |
| 1376 | VG_(debugLog)(1,"transtab", "allocate sector %d\n", sno); |
sewardj | 059838b | 2012-12-17 12:44:03 +0000 | [diff] [blame] | 1377 | if (VG_(clo_stats)) |
| 1378 | VG_(dmsg)("transtab: " "allocate sector %d\n", sno); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1379 | |
| 1380 | sres = VG_(am_mmap_anon_float_valgrind)( 8 * tc_sector_szQ ); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1381 | if (sr_isError(sres)) { |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1382 | VG_(out_of_memory_NORETURN)("initialiseSector(TC)", |
| 1383 | 8 * tc_sector_szQ ); |
| 1384 | /*NOTREACHED*/ |
| 1385 | } |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1386 | sec->tc = (ULong*)(AddrH)sr_Res(sres); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1387 | |
| 1388 | sres = VG_(am_mmap_anon_float_valgrind) |
| 1389 | ( N_TTES_PER_SECTOR * sizeof(TTEntry) ); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1390 | if (sr_isError(sres)) { |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1391 | VG_(out_of_memory_NORETURN)("initialiseSector(TT)", |
| 1392 | N_TTES_PER_SECTOR * sizeof(TTEntry) ); |
| 1393 | /*NOTREACHED*/ |
| 1394 | } |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1395 | sec->tt = (TTEntry*)(AddrH)sr_Res(sres); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1396 | |
| 1397 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
| 1398 | sec->tt[i].status = Empty; |
| 1399 | sec->tt[i].n_tte2ec = 0; |
| 1400 | } |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1401 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1402 | /* Set up the host_extents array. */ |
| 1403 | sec->host_extents |
| 1404 | = VG_(newXA)(ttaux_malloc, "transtab.initialiseSector(host_extents)", |
| 1405 | ttaux_free, |
| 1406 | sizeof(HostExtent)); |
| 1407 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1408 | /* Add an entry in the sector_search_order */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1409 | for (i = 0; i < n_sectors; i++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1410 | if (sector_search_order[i] == -1) |
| 1411 | break; |
| 1412 | } |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1413 | vg_assert(i >= 0 && i < n_sectors); |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1414 | sector_search_order[i] = sno; |
| 1415 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1416 | if (VG_(clo_verbosity) > 2) |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 1417 | VG_(message)(Vg_DebugMsg, "TT/TC: initialise sector %d\n", sno); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1418 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1419 | } else { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1420 | |
| 1421 | /* Sector has been used before. Dump the old contents. */ |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1422 | VG_(debugLog)(1,"transtab", "recycle sector %d\n", sno); |
sewardj | 059838b | 2012-12-17 12:44:03 +0000 | [diff] [blame] | 1423 | if (VG_(clo_stats)) |
| 1424 | VG_(dmsg)("transtab: " "recycle sector %d\n", sno); |
| 1425 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1426 | vg_assert(sec->tt != NULL); |
| 1427 | vg_assert(sec->tc_next != NULL); |
| 1428 | n_dump_count += sec->tt_n_inuse; |
| 1429 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1430 | VexArch vex_arch = VexArch_INVALID; |
| 1431 | VG_(machine_get_VexArchInfo)( &vex_arch, NULL ); |
| 1432 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1433 | /* Visit each just-about-to-be-abandoned translation. */ |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1434 | if (DEBUG_TRANSTAB) VG_(printf)("QQQ unlink-entire-sector: %d START\n", |
| 1435 | sno); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1436 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1437 | if (sec->tt[i].status == InUse) { |
| 1438 | vg_assert(sec->tt[i].n_tte2ec >= 1); |
| 1439 | vg_assert(sec->tt[i].n_tte2ec <= 3); |
| 1440 | n_dump_osize += vge_osize(&sec->tt[i].vge); |
sewardj | 3786772 | 2005-10-12 10:51:01 +0000 | [diff] [blame] | 1441 | /* Tell the tool too. */ |
sewardj | 0b9d74a | 2006-12-24 02:24:11 +0000 | [diff] [blame] | 1442 | if (VG_(needs).superblock_discards) { |
| 1443 | VG_TDICT_CALL( tool_discard_superblock_info, |
sewardj | 4ba057c | 2005-10-18 12:04:18 +0000 | [diff] [blame] | 1444 | sec->tt[i].entry, |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1445 | sec->tt[i].vge ); |
sewardj | 3786772 | 2005-10-12 10:51:01 +0000 | [diff] [blame] | 1446 | } |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1447 | unchain_in_preparation_for_deletion(vex_arch, sno, i); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1448 | } else { |
| 1449 | vg_assert(sec->tt[i].n_tte2ec == 0); |
| 1450 | } |
| 1451 | sec->tt[i].status = Empty; |
| 1452 | sec->tt[i].n_tte2ec = 0; |
| 1453 | } |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1454 | if (DEBUG_TRANSTAB) VG_(printf)("QQQ unlink-entire-sector: %d END\n", |
| 1455 | sno); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1456 | |
| 1457 | /* Free up the eclass structures. */ |
| 1458 | for (i = 0; i < ECLASS_N; i++) { |
| 1459 | if (sec->ec2tte_size[i] == 0) { |
| 1460 | vg_assert(sec->ec2tte_used[i] == 0); |
| 1461 | vg_assert(sec->ec2tte[i] == NULL); |
| 1462 | } else { |
| 1463 | vg_assert(sec->ec2tte[i] != NULL); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1464 | ttaux_free(sec->ec2tte[i]); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1465 | sec->ec2tte[i] = NULL; |
| 1466 | sec->ec2tte_size[i] = 0; |
| 1467 | sec->ec2tte_used[i] = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1468 | } |
| 1469 | } |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1470 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1471 | /* Empty out the host extents array. */ |
| 1472 | vg_assert(sec->host_extents != NULL); |
| 1473 | VG_(dropTailXA)(sec->host_extents, VG_(sizeXA)(sec->host_extents)); |
| 1474 | vg_assert(VG_(sizeXA)(sec->host_extents) == 0); |
| 1475 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1476 | /* Sanity check: ensure it is already in |
| 1477 | sector_search_order[]. */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1478 | for (i = 0; i < n_sectors; i++) { |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1479 | if (sector_search_order[i] == sno) |
| 1480 | break; |
| 1481 | } |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1482 | vg_assert(i >= 0 && i < n_sectors); |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1483 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1484 | if (VG_(clo_verbosity) > 2) |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 1485 | VG_(message)(Vg_DebugMsg, "TT/TC: recycle sector %d\n", sno); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1486 | } |
| 1487 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1488 | sec->tc_next = sec->tc; |
| 1489 | sec->tt_n_inuse = 0; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1490 | |
| 1491 | invalidateFastCache(); |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1492 | |
| 1493 | { Bool sane = sanity_check_sector_search_order(); |
| 1494 | vg_assert(sane); |
| 1495 | } |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1496 | } |
| 1497 | |
| 1498 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1499 | /* Add a translation of vge to TT/TC. The translation is temporarily |
| 1500 | in code[0 .. code_len-1]. |
| 1501 | |
| 1502 | pre: youngest_sector points to a valid (although possibly full) |
| 1503 | sector. |
| 1504 | */ |
njn | 8bddf58 | 2005-05-13 23:40:55 +0000 | [diff] [blame] | 1505 | void VG_(add_to_transtab)( VexGuestExtents* vge, |
| 1506 | Addr64 entry, |
| 1507 | AddrH code, |
sewardj | 26412bd | 2005-07-07 10:05:05 +0000 | [diff] [blame] | 1508 | UInt code_len, |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1509 | Bool is_self_checking, |
| 1510 | Int offs_profInc, |
sewardj | b7301c6 | 2012-04-24 11:50:49 +0000 | [diff] [blame] | 1511 | UInt n_guest_instrs, |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1512 | VexArch arch_host ) |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1513 | { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1514 | Int tcAvailQ, reqdQ, y, i; |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1515 | ULong *tcptr, *tcptr2; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1516 | UChar* srcP; |
| 1517 | UChar* dstP; |
| 1518 | |
sewardj | 663a1bd | 2005-04-24 11:22:44 +0000 | [diff] [blame] | 1519 | vg_assert(init_done); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1520 | vg_assert(vge->n_used >= 1 && vge->n_used <= 3); |
sewardj | e808930 | 2006-10-17 02:15:17 +0000 | [diff] [blame] | 1521 | |
| 1522 | /* 60000: should agree with N_TMPBUF in m_translate.c. */ |
| 1523 | vg_assert(code_len > 0 && code_len < 60000); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1524 | |
sewardj | b7301c6 | 2012-04-24 11:50:49 +0000 | [diff] [blame] | 1525 | /* Generally stay sane */ |
| 1526 | vg_assert(n_guest_instrs < 200); /* it can be zero, tho */ |
| 1527 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1528 | if (DEBUG_TRANSTAB) |
| 1529 | VG_(printf)("add_to_transtab(entry = 0x%llx, len = %d) ...\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1530 | entry, code_len); |
| 1531 | |
| 1532 | n_in_count++; |
| 1533 | n_in_tsize += code_len; |
| 1534 | n_in_osize += vge_osize(vge); |
sewardj | 26412bd | 2005-07-07 10:05:05 +0000 | [diff] [blame] | 1535 | if (is_self_checking) |
| 1536 | n_in_sc_count++; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1537 | |
| 1538 | y = youngest_sector; |
| 1539 | vg_assert(isValidSector(y)); |
| 1540 | |
| 1541 | if (sectors[y].tc == NULL) |
| 1542 | initialiseSector(y); |
| 1543 | |
| 1544 | /* Try putting the translation in this sector. */ |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1545 | reqdQ = (code_len + 7) >> 3; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1546 | |
| 1547 | /* Will it fit in tc? */ |
| 1548 | tcAvailQ = ((ULong*)(§ors[y].tc[tc_sector_szQ])) |
| 1549 | - ((ULong*)(sectors[y].tc_next)); |
| 1550 | vg_assert(tcAvailQ >= 0); |
| 1551 | vg_assert(tcAvailQ <= tc_sector_szQ); |
| 1552 | |
| 1553 | if (tcAvailQ < reqdQ |
| 1554 | || sectors[y].tt_n_inuse >= N_TTES_PER_SECTOR_USABLE) { |
| 1555 | /* No. So move on to the next sector. Either it's never been |
| 1556 | used before, in which case it will get its tt/tc allocated |
| 1557 | now, or it has been used before, in which case it is set to be |
| 1558 | empty, hence throwing out the oldest sector. */ |
sewardj | a16ea0a | 2005-09-30 10:34:06 +0000 | [diff] [blame] | 1559 | vg_assert(tc_sector_szQ > 0); |
sewardj | 059838b | 2012-12-17 12:44:03 +0000 | [diff] [blame] | 1560 | Int tt_loading_pct = (100 * sectors[y].tt_n_inuse) |
| 1561 | / N_TTES_PER_SECTOR; |
| 1562 | Int tc_loading_pct = (100 * (tc_sector_szQ - tcAvailQ)) |
| 1563 | / tc_sector_szQ; |
sewardj | a16ea0a | 2005-09-30 10:34:06 +0000 | [diff] [blame] | 1564 | VG_(debugLog)(1,"transtab", |
| 1565 | "declare sector %d full " |
| 1566 | "(TT loading %2d%%, TC loading %2d%%)\n", |
sewardj | 059838b | 2012-12-17 12:44:03 +0000 | [diff] [blame] | 1567 | y, tt_loading_pct, tc_loading_pct); |
| 1568 | if (VG_(clo_stats)) { |
| 1569 | VG_(dmsg)("transtab: " |
| 1570 | "declare sector %d full " |
| 1571 | "(TT loading %2d%%, TC loading %2d%%)\n", |
| 1572 | y, tt_loading_pct, tc_loading_pct); |
| 1573 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1574 | youngest_sector++; |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1575 | if (youngest_sector >= n_sectors) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1576 | youngest_sector = 0; |
| 1577 | y = youngest_sector; |
| 1578 | initialiseSector(y); |
| 1579 | } |
| 1580 | |
| 1581 | /* Be sure ... */ |
| 1582 | tcAvailQ = ((ULong*)(§ors[y].tc[tc_sector_szQ])) |
| 1583 | - ((ULong*)(sectors[y].tc_next)); |
| 1584 | vg_assert(tcAvailQ >= 0); |
| 1585 | vg_assert(tcAvailQ <= tc_sector_szQ); |
| 1586 | vg_assert(tcAvailQ >= reqdQ); |
| 1587 | vg_assert(sectors[y].tt_n_inuse < N_TTES_PER_SECTOR_USABLE); |
| 1588 | vg_assert(sectors[y].tt_n_inuse >= 0); |
| 1589 | |
| 1590 | /* Copy into tc. */ |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1591 | tcptr = sectors[y].tc_next; |
| 1592 | vg_assert(tcptr >= §ors[y].tc[0]); |
| 1593 | vg_assert(tcptr <= §ors[y].tc[tc_sector_szQ]); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1594 | |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1595 | dstP = (UChar*)tcptr; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1596 | srcP = (UChar*)code; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1597 | VG_(memcpy)(dstP, srcP, code_len); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1598 | sectors[y].tc_next += reqdQ; |
| 1599 | sectors[y].tt_n_inuse++; |
| 1600 | |
| 1601 | /* more paranoia */ |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1602 | tcptr2 = sectors[y].tc_next; |
| 1603 | vg_assert(tcptr2 >= §ors[y].tc[0]); |
| 1604 | vg_assert(tcptr2 <= §ors[y].tc[tc_sector_szQ]); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1605 | |
| 1606 | /* Find an empty tt slot, and use it. There must be such a slot |
| 1607 | since tt is never allowed to get completely full. */ |
| 1608 | i = HASH_TT(entry); |
| 1609 | vg_assert(i >= 0 && i < N_TTES_PER_SECTOR); |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1610 | while (True) { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1611 | if (sectors[y].tt[i].status == Empty |
| 1612 | || sectors[y].tt[i].status == Deleted) |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1613 | break; |
| 1614 | i++; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1615 | if (i >= N_TTES_PER_SECTOR) |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1616 | i = 0; |
| 1617 | } |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1618 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1619 | TTEntry__init(§ors[y].tt[i]); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1620 | sectors[y].tt[i].status = InUse; |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 1621 | sectors[y].tt[i].tcptr = tcptr; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1622 | sectors[y].tt[i].count = 0; |
sewardj | b7301c6 | 2012-04-24 11:50:49 +0000 | [diff] [blame] | 1623 | sectors[y].tt[i].weight = n_guest_instrs == 0 ? 1 : n_guest_instrs; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1624 | sectors[y].tt[i].vge = *vge; |
| 1625 | sectors[y].tt[i].entry = entry; |
| 1626 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1627 | /* Patch in the profile counter location, if necessary. */ |
| 1628 | if (offs_profInc != -1) { |
| 1629 | vg_assert(offs_profInc >= 0 && offs_profInc < code_len); |
| 1630 | VexInvalRange vir |
| 1631 | = LibVEX_PatchProfInc( arch_host, |
| 1632 | dstP + offs_profInc, |
| 1633 | §ors[y].tt[i].count ); |
| 1634 | VG_(invalidate_icache)( (void*)vir.start, vir.len ); |
| 1635 | } |
| 1636 | |
| 1637 | VG_(invalidate_icache)( dstP, code_len ); |
| 1638 | |
| 1639 | /* Add this entry to the host_extents map, checking that we're |
| 1640 | adding in order. */ |
| 1641 | { HostExtent hx; |
| 1642 | hx.start = (UChar*)tcptr; |
| 1643 | hx.len = code_len; |
| 1644 | hx.tteNo = i; |
| 1645 | vg_assert(hx.len > 0); /* bsearch fails w/ zero length entries */ |
| 1646 | XArray* hx_array = sectors[y].host_extents; |
| 1647 | vg_assert(hx_array); |
| 1648 | Word n = VG_(sizeXA)(hx_array); |
| 1649 | if (n > 0) { |
| 1650 | HostExtent* hx_prev = (HostExtent*)VG_(indexXA)(hx_array, n-1); |
| 1651 | vg_assert(hx_prev->start + hx_prev->len <= hx.start); |
| 1652 | } |
| 1653 | VG_(addToXA)(hx_array, &hx); |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 1654 | if (DEBUG_TRANSTAB) |
| 1655 | VG_(printf)("... hx.start 0x%p hx.len %u sector %d ttslot %d\n", |
| 1656 | hx.start, hx.len, y, i); |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1657 | } |
| 1658 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1659 | /* Update the fast-cache. */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1660 | setFastCacheEntry( entry, tcptr ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1661 | |
| 1662 | /* Note the eclass numbers for this translation. */ |
| 1663 | upd_eclasses_after_add( §ors[y], i ); |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1667 | /* Search for the translation of the given guest address. If |
| 1668 | requested, a successful search can also cause the fast-caches to be |
| 1669 | updated. |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1670 | */ |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1671 | Bool VG_(search_transtab) ( /*OUT*/AddrH* res_hcode, |
| 1672 | /*OUT*/UInt* res_sNo, |
| 1673 | /*OUT*/UInt* res_tteNo, |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1674 | Addr64 guest_addr, |
| 1675 | Bool upd_cache ) |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1676 | { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1677 | Int i, j, k, kstart, sno; |
sewardj | 663a1bd | 2005-04-24 11:22:44 +0000 | [diff] [blame] | 1678 | |
| 1679 | vg_assert(init_done); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1680 | /* Find the initial probe point just once. It will be the same in |
| 1681 | all sectors and avoids multiple expensive % operations. */ |
| 1682 | n_full_lookups++; |
| 1683 | k = -1; |
| 1684 | kstart = HASH_TT(guest_addr); |
| 1685 | vg_assert(kstart >= 0 && kstart < N_TTES_PER_SECTOR); |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1686 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1687 | /* Search in all the sectors,using sector_search_order[] as a |
| 1688 | heuristic guide as to what order to visit the sectors. */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1689 | for (i = 0; i < n_sectors; i++) { |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1690 | |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1691 | sno = sector_search_order[i]; |
| 1692 | if (UNLIKELY(sno == -1)) |
| 1693 | return False; /* run out of sectors to search */ |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1694 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1695 | k = kstart; |
| 1696 | for (j = 0; j < N_TTES_PER_SECTOR; j++) { |
| 1697 | n_lookup_probes++; |
| 1698 | if (sectors[sno].tt[k].status == InUse |
| 1699 | && sectors[sno].tt[k].entry == guest_addr) { |
| 1700 | /* found it */ |
| 1701 | if (upd_cache) |
| 1702 | setFastCacheEntry( |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1703 | guest_addr, sectors[sno].tt[k].tcptr ); |
| 1704 | if (res_hcode) |
| 1705 | *res_hcode = (AddrH)sectors[sno].tt[k].tcptr; |
| 1706 | if (res_sNo) |
| 1707 | *res_sNo = sno; |
| 1708 | if (res_tteNo) |
| 1709 | *res_tteNo = k; |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 1710 | /* pull this one one step closer to the front. For large |
| 1711 | apps this more or less halves the number of required |
| 1712 | probes. */ |
| 1713 | if (i > 0) { |
| 1714 | Int tmp = sector_search_order[i-1]; |
| 1715 | sector_search_order[i-1] = sector_search_order[i]; |
| 1716 | sector_search_order[i] = tmp; |
| 1717 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1718 | return True; |
| 1719 | } |
| 1720 | if (sectors[sno].tt[k].status == Empty) |
| 1721 | break; /* not found in this sector */ |
| 1722 | k++; |
| 1723 | if (k == N_TTES_PER_SECTOR) |
| 1724 | k = 0; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1725 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1726 | |
| 1727 | /* If we fall off the end, all entries are InUse and not |
| 1728 | matching, or Deleted. In any case we did not find it in this |
| 1729 | sector. */ |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1730 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1731 | |
| 1732 | /* Not found in any sector. */ |
| 1733 | return False; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 1734 | } |
| 1735 | |
| 1736 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1737 | /*-------------------------------------------------------------*/ |
| 1738 | /*--- Delete translations. ---*/ |
| 1739 | /*-------------------------------------------------------------*/ |
| 1740 | |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 1741 | /* forward */ |
| 1742 | static void unredir_discard_translations( Addr64, ULong ); |
| 1743 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1744 | /* Stuff for deleting translations which intersect with a given |
| 1745 | address range. Unfortunately, to make this run at a reasonable |
| 1746 | speed, it is complex. */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1747 | |
| 1748 | static inline |
sewardj | a305450 | 2005-07-26 23:04:25 +0000 | [diff] [blame] | 1749 | Bool overlap1 ( Addr64 s1, ULong r1, Addr64 s2, ULong r2 ) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1750 | { |
sewardj | a305450 | 2005-07-26 23:04:25 +0000 | [diff] [blame] | 1751 | Addr64 e1 = s1 + r1 - 1ULL; |
| 1752 | Addr64 e2 = s2 + r2 - 1ULL; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1753 | if (e1 < s2 || e2 < s1) |
| 1754 | return False; |
| 1755 | return True; |
| 1756 | } |
| 1757 | |
| 1758 | static inline |
sewardj | a305450 | 2005-07-26 23:04:25 +0000 | [diff] [blame] | 1759 | Bool overlaps ( Addr64 start, ULong range, VexGuestExtents* vge ) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1760 | { |
| 1761 | if (overlap1(start, range, vge->base[0], (UInt)vge->len[0])) |
| 1762 | return True; |
| 1763 | if (vge->n_used < 2) |
| 1764 | return False; |
| 1765 | if (overlap1(start, range, vge->base[1], (UInt)vge->len[1])) |
| 1766 | return True; |
| 1767 | if (vge->n_used < 3) |
| 1768 | return False; |
| 1769 | if (overlap1(start, range, vge->base[2], (UInt)vge->len[2])) |
| 1770 | return True; |
| 1771 | return False; |
| 1772 | } |
| 1773 | |
| 1774 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1775 | /* Delete a tt entry, and update all the eclass data accordingly. */ |
| 1776 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1777 | static void delete_tte ( /*MOD*/Sector* sec, UInt secNo, Int tteno, |
| 1778 | VexArch vex_arch ) |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1779 | { |
| 1780 | Int i, ec_num, ec_idx; |
| 1781 | TTEntry* tte; |
| 1782 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1783 | /* sec and secNo are mutually redundant; cross-check. */ |
| 1784 | vg_assert(sec == §ors[secNo]); |
| 1785 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1786 | vg_assert(tteno >= 0 && tteno < N_TTES_PER_SECTOR); |
| 1787 | tte = &sec->tt[tteno]; |
| 1788 | vg_assert(tte->status == InUse); |
| 1789 | vg_assert(tte->n_tte2ec >= 1 && tte->n_tte2ec <= 3); |
| 1790 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1791 | /* Unchain .. */ |
| 1792 | unchain_in_preparation_for_deletion(vex_arch, secNo, tteno); |
| 1793 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1794 | /* Deal with the ec-to-tte links first. */ |
| 1795 | for (i = 0; i < tte->n_tte2ec; i++) { |
| 1796 | ec_num = (Int)tte->tte2ec_ec[i]; |
| 1797 | ec_idx = tte->tte2ec_ix[i]; |
| 1798 | vg_assert(ec_num >= 0 && ec_num < ECLASS_N); |
| 1799 | vg_assert(ec_idx >= 0); |
| 1800 | vg_assert(ec_idx < sec->ec2tte_used[ec_num]); |
| 1801 | /* Assert that the two links point at each other. */ |
| 1802 | vg_assert(sec->ec2tte[ec_num][ec_idx] == (UShort)tteno); |
| 1803 | /* "delete" the pointer back to here. */ |
| 1804 | sec->ec2tte[ec_num][ec_idx] = EC2TTE_DELETED; |
| 1805 | } |
| 1806 | |
| 1807 | /* Now fix up this TTEntry. */ |
| 1808 | tte->status = Deleted; |
| 1809 | tte->n_tte2ec = 0; |
| 1810 | |
| 1811 | /* Stats .. */ |
| 1812 | sec->tt_n_inuse--; |
| 1813 | n_disc_count++; |
| 1814 | n_disc_osize += vge_osize(&tte->vge); |
| 1815 | |
| 1816 | /* Tell the tool too. */ |
sewardj | 0b9d74a | 2006-12-24 02:24:11 +0000 | [diff] [blame] | 1817 | if (VG_(needs).superblock_discards) { |
| 1818 | VG_TDICT_CALL( tool_discard_superblock_info, |
sewardj | 4ba057c | 2005-10-18 12:04:18 +0000 | [diff] [blame] | 1819 | tte->entry, |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1820 | tte->vge ); |
| 1821 | } |
| 1822 | } |
| 1823 | |
| 1824 | |
| 1825 | /* Delete translations from sec which intersect specified range, but |
| 1826 | only consider translations in the specified eclass. */ |
| 1827 | |
| 1828 | static |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1829 | Bool delete_translations_in_sector_eclass ( /*MOD*/Sector* sec, UInt secNo, |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1830 | Addr64 guest_start, ULong range, |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1831 | Int ec, |
| 1832 | VexArch vex_arch ) |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1833 | { |
| 1834 | Int i; |
| 1835 | UShort tteno; |
| 1836 | Bool anyDeld = False; |
| 1837 | TTEntry* tte; |
| 1838 | |
| 1839 | vg_assert(ec >= 0 && ec < ECLASS_N); |
| 1840 | |
| 1841 | for (i = 0; i < sec->ec2tte_used[ec]; i++) { |
| 1842 | |
| 1843 | tteno = sec->ec2tte[ec][i]; |
| 1844 | if (tteno == EC2TTE_DELETED) { |
| 1845 | /* already deleted */ |
| 1846 | continue; |
| 1847 | } |
| 1848 | |
| 1849 | vg_assert(tteno < N_TTES_PER_SECTOR); |
| 1850 | |
| 1851 | tte = &sec->tt[tteno]; |
| 1852 | vg_assert(tte->status == InUse); |
| 1853 | |
| 1854 | if (overlaps( guest_start, range, &tte->vge )) { |
| 1855 | anyDeld = True; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1856 | delete_tte( sec, secNo, (Int)tteno, vex_arch ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1857 | } |
| 1858 | |
| 1859 | } |
| 1860 | |
| 1861 | return anyDeld; |
| 1862 | } |
| 1863 | |
| 1864 | |
| 1865 | /* Delete translations from sec which intersect specified range, the |
| 1866 | slow way, by inspecting all translations in sec. */ |
| 1867 | |
| 1868 | static |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1869 | Bool delete_translations_in_sector ( /*MOD*/Sector* sec, UInt secNo, |
| 1870 | Addr64 guest_start, ULong range, |
| 1871 | VexArch vex_arch ) |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1872 | { |
| 1873 | Int i; |
| 1874 | Bool anyDeld = False; |
| 1875 | |
| 1876 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
| 1877 | if (sec->tt[i].status == InUse |
| 1878 | && overlaps( guest_start, range, &sec->tt[i].vge )) { |
| 1879 | anyDeld = True; |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1880 | delete_tte( sec, secNo, i, vex_arch ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1881 | } |
| 1882 | } |
| 1883 | |
| 1884 | return anyDeld; |
| 1885 | } |
| 1886 | |
| 1887 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1888 | void VG_(discard_translations) ( Addr64 guest_start, ULong range, |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame] | 1889 | const HChar* who ) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1890 | { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1891 | Sector* sec; |
| 1892 | Int sno, ec; |
| 1893 | Bool anyDeleted = False; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1894 | |
sewardj | 663a1bd | 2005-04-24 11:22:44 +0000 | [diff] [blame] | 1895 | vg_assert(init_done); |
| 1896 | |
sewardj | a16ea0a | 2005-09-30 10:34:06 +0000 | [diff] [blame] | 1897 | VG_(debugLog)(2, "transtab", |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1898 | "discard_translations(0x%llx, %lld) req by %s\n", |
| 1899 | guest_start, range, who ); |
| 1900 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1901 | /* Pre-deletion sanity check */ |
| 1902 | if (VG_(clo_sanity_level >= 4)) { |
| 1903 | Bool sane = sanity_check_all_sectors(); |
| 1904 | vg_assert(sane); |
| 1905 | } |
| 1906 | |
| 1907 | if (range == 0) |
| 1908 | return; |
| 1909 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1910 | VexArch vex_arch = VexArch_INVALID; |
| 1911 | VG_(machine_get_VexArchInfo)( &vex_arch, NULL ); |
| 1912 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1913 | /* There are two different ways to do this. |
| 1914 | |
| 1915 | If the range fits within a single address-range equivalence |
| 1916 | class, as will be the case for a cache line sized invalidation, |
| 1917 | then we only have to inspect the set of translations listed in |
| 1918 | that equivalence class, and also in the "sin-bin" equivalence |
| 1919 | class ECLASS_MISC. |
| 1920 | |
| 1921 | Otherwise, the invalidation is of a larger range and probably |
| 1922 | results from munmap. In this case it's (probably!) faster just |
| 1923 | to inspect all translations, dump those we don't want, and |
| 1924 | regenerate the equivalence class information (since modifying it |
| 1925 | in-situ is even more expensive). |
| 1926 | */ |
| 1927 | |
| 1928 | /* First off, figure out if the range falls within a single class, |
| 1929 | and if so which one. */ |
| 1930 | |
| 1931 | ec = ECLASS_MISC; |
| 1932 | if (range < (1ULL << ECLASS_SHIFT)) |
| 1933 | ec = range_to_eclass( guest_start, (UInt)range ); |
| 1934 | |
| 1935 | /* if ec is ECLASS_MISC then we aren't looking at just a single |
| 1936 | class, so use the slow scheme. Else use the fast scheme, |
| 1937 | examining 'ec' and ECLASS_MISC. */ |
| 1938 | |
| 1939 | if (ec != ECLASS_MISC) { |
| 1940 | |
| 1941 | VG_(debugLog)(2, "transtab", |
| 1942 | " FAST, ec = %d\n", ec); |
| 1943 | |
| 1944 | /* Fast scheme */ |
| 1945 | vg_assert(ec >= 0 && ec < ECLASS_MISC); |
| 1946 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1947 | for (sno = 0; sno < n_sectors; sno++) { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1948 | sec = §ors[sno]; |
| 1949 | if (sec->tc == NULL) |
| 1950 | continue; |
| 1951 | anyDeleted |= delete_translations_in_sector_eclass( |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1952 | sec, sno, guest_start, range, ec, |
| 1953 | vex_arch |
| 1954 | ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1955 | anyDeleted |= delete_translations_in_sector_eclass( |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1956 | sec, sno, guest_start, range, ECLASS_MISC, |
| 1957 | vex_arch |
| 1958 | ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1959 | } |
| 1960 | |
| 1961 | } else { |
| 1962 | |
| 1963 | /* slow scheme */ |
| 1964 | |
| 1965 | VG_(debugLog)(2, "transtab", |
| 1966 | " SLOW, ec = %d\n", ec); |
| 1967 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1968 | for (sno = 0; sno < n_sectors; sno++) { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1969 | sec = §ors[sno]; |
| 1970 | if (sec->tc == NULL) |
| 1971 | continue; |
| 1972 | anyDeleted |= delete_translations_in_sector( |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 1973 | sec, sno, guest_start, range, vex_arch ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1974 | } |
| 1975 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 1976 | } |
| 1977 | |
| 1978 | if (anyDeleted) |
| 1979 | invalidateFastCache(); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1980 | |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 1981 | /* don't forget the no-redir cache */ |
| 1982 | unredir_discard_translations( guest_start, range ); |
| 1983 | |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1984 | /* Post-deletion sanity check */ |
| 1985 | if (VG_(clo_sanity_level >= 4)) { |
| 1986 | Int i; |
| 1987 | TTEntry* tte; |
| 1988 | Bool sane = sanity_check_all_sectors(); |
| 1989 | vg_assert(sane); |
| 1990 | /* But now, also check the requested address range isn't |
| 1991 | present anywhere. */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 1992 | for (sno = 0; sno < n_sectors; sno++) { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 1993 | sec = §ors[sno]; |
| 1994 | if (sec->tc == NULL) |
| 1995 | continue; |
| 1996 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
| 1997 | tte = &sec->tt[i]; |
| 1998 | if (tte->status != InUse) |
| 1999 | continue; |
| 2000 | vg_assert(!overlaps( guest_start, range, &tte->vge )); |
| 2001 | } |
| 2002 | } |
| 2003 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2004 | } |
| 2005 | |
| 2006 | |
| 2007 | /*------------------------------------------------------------*/ |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2008 | /*--- AUXILIARY: the unredirected TT/TC ---*/ |
| 2009 | /*------------------------------------------------------------*/ |
| 2010 | |
| 2011 | /* A very simple translation cache which holds a small number of |
| 2012 | unredirected translations. This is completely independent of the |
| 2013 | main tt/tc structures. When unredir_tc or unredir_tt becomes full, |
| 2014 | both structures are simply dumped and we start over. |
| 2015 | |
| 2016 | Since these translations are unredirected, the search key is (by |
| 2017 | definition) the first address entry in the .vge field. */ |
| 2018 | |
| 2019 | /* Sized to hold 500 translations of average size 1000 bytes. */ |
| 2020 | |
| 2021 | #define UNREDIR_SZB 1000 |
| 2022 | |
| 2023 | #define N_UNREDIR_TT 500 |
| 2024 | #define N_UNREDIR_TCQ (N_UNREDIR_TT * UNREDIR_SZB / sizeof(ULong)) |
| 2025 | |
| 2026 | typedef |
| 2027 | struct { |
| 2028 | VexGuestExtents vge; |
| 2029 | Addr hcode; |
| 2030 | Bool inUse; |
| 2031 | } |
| 2032 | UTCEntry; |
| 2033 | |
| 2034 | /* We just allocate forwards in _tc, never deleting. */ |
tom | 78c0c09 | 2006-01-13 09:57:01 +0000 | [diff] [blame] | 2035 | static ULong *unredir_tc; |
| 2036 | static Int unredir_tc_used = N_UNREDIR_TCQ; |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2037 | |
| 2038 | /* Slots in _tt can come into use and out again (.inUse). |
| 2039 | Nevertheless _tt_highwater is maintained so that invalidations |
| 2040 | don't have to scan all the slots when only a few are in use. |
| 2041 | _tt_highwater holds the index of the highest ever allocated |
| 2042 | slot. */ |
| 2043 | static UTCEntry unredir_tt[N_UNREDIR_TT]; |
| 2044 | static Int unredir_tt_highwater; |
| 2045 | |
| 2046 | |
| 2047 | static void init_unredir_tt_tc ( void ) |
| 2048 | { |
| 2049 | Int i; |
tom | 78c0c09 | 2006-01-13 09:57:01 +0000 | [diff] [blame] | 2050 | if (unredir_tc == NULL) { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 2051 | SysRes sres = VG_(am_mmap_anon_float_valgrind) |
| 2052 | ( N_UNREDIR_TT * UNREDIR_SZB ); |
| 2053 | if (sr_isError(sres)) { |
| 2054 | VG_(out_of_memory_NORETURN)("init_unredir_tt_tc", |
| 2055 | N_UNREDIR_TT * UNREDIR_SZB); |
tom | 78c0c09 | 2006-01-13 09:57:01 +0000 | [diff] [blame] | 2056 | /*NOTREACHED*/ |
| 2057 | } |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 2058 | unredir_tc = (ULong *)(AddrH)sr_Res(sres); |
tom | 78c0c09 | 2006-01-13 09:57:01 +0000 | [diff] [blame] | 2059 | } |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2060 | unredir_tc_used = 0; |
| 2061 | for (i = 0; i < N_UNREDIR_TT; i++) |
| 2062 | unredir_tt[i].inUse = False; |
| 2063 | unredir_tt_highwater = -1; |
| 2064 | } |
| 2065 | |
| 2066 | /* Do a sanity check; return False on failure. */ |
| 2067 | static Bool sanity_check_redir_tt_tc ( void ) |
| 2068 | { |
| 2069 | Int i; |
| 2070 | if (unredir_tt_highwater < -1) return False; |
| 2071 | if (unredir_tt_highwater >= N_UNREDIR_TT) return False; |
| 2072 | |
| 2073 | for (i = unredir_tt_highwater+1; i < N_UNREDIR_TT; i++) |
| 2074 | if (unredir_tt[i].inUse) |
| 2075 | return False; |
| 2076 | |
| 2077 | if (unredir_tc_used < 0) return False; |
| 2078 | if (unredir_tc_used > N_UNREDIR_TCQ) return False; |
| 2079 | |
| 2080 | return True; |
| 2081 | } |
| 2082 | |
| 2083 | |
| 2084 | /* Add an UNREDIRECTED translation of vge to TT/TC. The translation |
| 2085 | is temporarily in code[0 .. code_len-1]. |
| 2086 | */ |
| 2087 | void VG_(add_to_unredir_transtab)( VexGuestExtents* vge, |
| 2088 | Addr64 entry, |
| 2089 | AddrH code, |
njn | 1dcee09 | 2009-02-24 03:07:37 +0000 | [diff] [blame] | 2090 | UInt code_len ) |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2091 | { |
| 2092 | Int i, j, code_szQ; |
| 2093 | HChar *srcP, *dstP; |
| 2094 | |
| 2095 | vg_assert(sanity_check_redir_tt_tc()); |
| 2096 | |
| 2097 | /* This is the whole point: it's not redirected! */ |
| 2098 | vg_assert(entry == vge->base[0]); |
| 2099 | |
| 2100 | /* How many unredir_tt slots are needed */ |
| 2101 | code_szQ = (code_len + 7) / 8; |
| 2102 | |
| 2103 | /* Look for an empty unredir_tc slot */ |
| 2104 | for (i = 0; i < N_UNREDIR_TT; i++) |
| 2105 | if (!unredir_tt[i].inUse) |
| 2106 | break; |
| 2107 | |
| 2108 | if (i >= N_UNREDIR_TT || code_szQ > (N_UNREDIR_TCQ - unredir_tc_used)) { |
| 2109 | /* It's full; dump everything we currently have */ |
| 2110 | init_unredir_tt_tc(); |
| 2111 | i = 0; |
| 2112 | } |
| 2113 | |
| 2114 | vg_assert(unredir_tc_used >= 0); |
| 2115 | vg_assert(unredir_tc_used <= N_UNREDIR_TCQ); |
| 2116 | vg_assert(code_szQ > 0); |
| 2117 | vg_assert(code_szQ + unredir_tc_used <= N_UNREDIR_TCQ); |
| 2118 | vg_assert(i >= 0 && i < N_UNREDIR_TT); |
| 2119 | vg_assert(unredir_tt[i].inUse == False); |
| 2120 | |
| 2121 | if (i > unredir_tt_highwater) |
| 2122 | unredir_tt_highwater = i; |
| 2123 | |
| 2124 | dstP = (HChar*)&unredir_tc[unredir_tc_used]; |
| 2125 | srcP = (HChar*)code; |
| 2126 | for (j = 0; j < code_len; j++) |
| 2127 | dstP[j] = srcP[j]; |
| 2128 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 2129 | VG_(invalidate_icache)( dstP, code_len ); |
sewardj | c0a02f8 | 2006-04-07 12:47:05 +0000 | [diff] [blame] | 2130 | |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2131 | unredir_tt[i].inUse = True; |
| 2132 | unredir_tt[i].vge = *vge; |
| 2133 | unredir_tt[i].hcode = (Addr)dstP; |
| 2134 | |
| 2135 | unredir_tc_used += code_szQ; |
| 2136 | vg_assert(unredir_tc_used >= 0); |
| 2137 | vg_assert(unredir_tc_used <= N_UNREDIR_TCQ); |
| 2138 | |
| 2139 | vg_assert(&dstP[code_len] <= (HChar*)&unredir_tc[unredir_tc_used]); |
| 2140 | } |
| 2141 | |
| 2142 | Bool VG_(search_unredir_transtab) ( /*OUT*/AddrH* result, |
| 2143 | Addr64 guest_addr ) |
| 2144 | { |
| 2145 | Int i; |
| 2146 | for (i = 0; i < N_UNREDIR_TT; i++) { |
| 2147 | if (!unredir_tt[i].inUse) |
| 2148 | continue; |
| 2149 | if (unredir_tt[i].vge.base[0] == guest_addr) { |
| 2150 | *result = (AddrH)unredir_tt[i].hcode; |
| 2151 | return True; |
| 2152 | } |
| 2153 | } |
| 2154 | return False; |
| 2155 | } |
| 2156 | |
| 2157 | static void unredir_discard_translations( Addr64 guest_start, ULong range ) |
| 2158 | { |
| 2159 | Int i; |
| 2160 | |
| 2161 | vg_assert(sanity_check_redir_tt_tc()); |
| 2162 | |
| 2163 | for (i = 0; i <= unredir_tt_highwater; i++) { |
| 2164 | if (unredir_tt[i].inUse |
| 2165 | && overlaps( guest_start, range, &unredir_tt[i].vge)) |
| 2166 | unredir_tt[i].inUse = False; |
| 2167 | } |
| 2168 | } |
| 2169 | |
| 2170 | |
| 2171 | /*------------------------------------------------------------*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2172 | /*--- Initialisation. ---*/ |
| 2173 | /*------------------------------------------------------------*/ |
| 2174 | |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2175 | void VG_(init_tt_tc) ( void ) |
| 2176 | { |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 2177 | Int i, avg_codeszQ; |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2178 | |
sewardj | 663a1bd | 2005-04-24 11:22:44 +0000 | [diff] [blame] | 2179 | vg_assert(!init_done); |
| 2180 | init_done = True; |
| 2181 | |
sewardj | 4ccf707 | 2004-11-28 16:58:05 +0000 | [diff] [blame] | 2182 | /* Otherwise lots of things go wrong... */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2183 | vg_assert(sizeof(ULong) == 8); |
| 2184 | vg_assert(sizeof(Addr64) == 8); |
sewardj | 5f76de0 | 2007-02-11 05:08:06 +0000 | [diff] [blame] | 2185 | /* check fast cache entries really are 2 words long */ |
| 2186 | vg_assert(sizeof(Addr) == sizeof(void*)); |
| 2187 | vg_assert(sizeof(FastCacheEntry) == 2 * sizeof(Addr)); |
| 2188 | /* check fast cache entries are packed back-to-back with no spaces */ |
| 2189 | vg_assert(sizeof( VG_(tt_fast) ) == VG_TT_FAST_SIZE * sizeof(FastCacheEntry)); |
| 2190 | /* check fast cache is aligned as we requested. Not fatal if it |
| 2191 | isn't, but we might as well make sure. */ |
| 2192 | vg_assert(VG_IS_16_ALIGNED( ((Addr) & VG_(tt_fast)[0]) )); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2193 | |
| 2194 | if (VG_(clo_verbosity) > 2) |
| 2195 | VG_(message)(Vg_DebugMsg, |
| 2196 | "TT/TC: VG_(init_tt_tc) " |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2197 | "(startup of code management)\n"); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2198 | |
| 2199 | /* Figure out how big each tc area should be. */ |
njn | 43b9a8a | 2005-05-10 04:37:01 +0000 | [diff] [blame] | 2200 | avg_codeszQ = (VG_(details).avg_translation_sizeB + 7) / 8; |
| 2201 | tc_sector_szQ = N_TTES_PER_SECTOR_USABLE * (1 + avg_codeszQ); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2202 | |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2203 | /* Ensure the calculated value is not way crazy. */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2204 | vg_assert(tc_sector_szQ >= 2 * N_TTES_PER_SECTOR_USABLE); |
sewardj | 1e0fff6 | 2011-01-10 15:01:03 +0000 | [diff] [blame] | 2205 | vg_assert(tc_sector_szQ <= 100 * N_TTES_PER_SECTOR_USABLE); |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2206 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2207 | n_sectors = VG_(clo_num_transtab_sectors); |
| 2208 | vg_assert(n_sectors >= MIN_N_SECTORS); |
| 2209 | vg_assert(n_sectors <= MAX_N_SECTORS); |
| 2210 | |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 2211 | /* Initialise the sectors, even the ones we aren't going to use. |
| 2212 | Set all fields to zero. */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2213 | youngest_sector = 0; |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 2214 | for (i = 0; i < MAX_N_SECTORS; i++) |
| 2215 | VG_(memset)(§ors[i], 0, sizeof(sectors[i])); |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2216 | |
sewardj | a11ec17 | 2013-10-18 11:18:45 +0000 | [diff] [blame] | 2217 | /* Initialise the sector_search_order hint table, including the |
| 2218 | entries we aren't going to use. */ |
| 2219 | for (i = 0; i < MAX_N_SECTORS; i++) |
sewardj | 5d0d1f3 | 2010-03-14 15:09:27 +0000 | [diff] [blame] | 2220 | sector_search_order[i] = -1; |
| 2221 | |
sewardj | 291849f | 2012-04-20 23:58:55 +0000 | [diff] [blame] | 2222 | /* Initialise the fast cache. */ |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2223 | invalidateFastCache(); |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2224 | |
sewardj | 0ec07f3 | 2006-01-12 12:32:32 +0000 | [diff] [blame] | 2225 | /* and the unredir tt/tc */ |
| 2226 | init_unredir_tt_tc(); |
| 2227 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2228 | if (VG_(clo_verbosity) > 2 || VG_(clo_stats) |
| 2229 | || VG_(debugLog_getLevel) () >= 2) { |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2230 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2231 | "TT/TC: cache: %d sectors of %d bytes each = %d total\n", |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2232 | n_sectors, 8 * tc_sector_szQ, |
| 2233 | n_sectors * 8 * tc_sector_szQ ); |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2234 | VG_(message)(Vg_DebugMsg, |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2235 | "TT/TC: table: %d tables of %d bytes each = %d total\n", |
| 2236 | n_sectors, (int)(N_TTES_PER_SECTOR * sizeof(TTEntry)), |
| 2237 | (int)(n_sectors * N_TTES_PER_SECTOR * sizeof(TTEntry))); |
| 2238 | VG_(message)(Vg_DebugMsg, |
| 2239 | "TT/TC: table: %d entries each = %d total entries" |
| 2240 | " max occupancy %d (%d%%)\n", |
| 2241 | N_TTES_PER_SECTOR, |
| 2242 | n_sectors * N_TTES_PER_SECTOR, |
| 2243 | n_sectors * N_TTES_PER_SECTOR_USABLE, |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2244 | SECTOR_TT_LIMIT_PERCENT ); |
| 2245 | } |
| 2246 | } |
| 2247 | |
| 2248 | |
| 2249 | /*------------------------------------------------------------*/ |
| 2250 | /*--- Printing out statistics. ---*/ |
| 2251 | /*------------------------------------------------------------*/ |
| 2252 | |
| 2253 | static ULong safe_idiv( ULong a, ULong b ) |
| 2254 | { |
| 2255 | return (b == 0 ? 0 : a / b); |
| 2256 | } |
| 2257 | |
| 2258 | UInt VG_(get_bbs_translated) ( void ) |
| 2259 | { |
| 2260 | return n_in_count; |
| 2261 | } |
| 2262 | |
| 2263 | void VG_(print_tt_tc_stats) ( void ) |
| 2264 | { |
| 2265 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2266 | " tt/tc: %'llu tt lookups requiring %'llu probes\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2267 | n_full_lookups, n_lookup_probes ); |
| 2268 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2269 | " tt/tc: %'llu fast-cache updates, %'llu flushes\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2270 | n_fast_updates, n_fast_flushes ); |
| 2271 | |
| 2272 | VG_(message)(Vg_DebugMsg, |
bart | a0b6b2c | 2008-07-07 06:49:24 +0000 | [diff] [blame] | 2273 | " transtab: new %'lld " |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2274 | "(%'llu -> %'llu; ratio %'llu:10) [%'llu scs]\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2275 | n_in_count, n_in_osize, n_in_tsize, |
sewardj | 26412bd | 2005-07-07 10:05:05 +0000 | [diff] [blame] | 2276 | safe_idiv(10*n_in_tsize, n_in_osize), |
| 2277 | n_in_sc_count); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2278 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2279 | " transtab: dumped %'llu (%'llu -> ?" "?)\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2280 | n_dump_count, n_dump_osize ); |
| 2281 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 2282 | " transtab: discarded %'llu (%'llu -> ?" "?)\n", |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2283 | n_disc_count, n_disc_osize ); |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 2284 | |
philippe | 3a53220 | 2013-02-24 23:16:58 +0000 | [diff] [blame] | 2285 | if (DEBUG_TRANSTAB) { |
sewardj | 6c1bbbb | 2005-10-18 02:30:42 +0000 | [diff] [blame] | 2286 | Int i; |
| 2287 | VG_(printf)("\n"); |
| 2288 | for (i = 0; i < ECLASS_N; i++) { |
| 2289 | VG_(printf)(" %4d", sectors[0].ec2tte_used[i]); |
| 2290 | if (i % 16 == 15) |
| 2291 | VG_(printf)("\n"); |
| 2292 | } |
| 2293 | VG_(printf)("\n\n"); |
| 2294 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2295 | } |
| 2296 | |
| 2297 | /*------------------------------------------------------------*/ |
| 2298 | /*--- Printing out of profiling results. ---*/ |
| 2299 | /*------------------------------------------------------------*/ |
| 2300 | |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2301 | static ULong score ( TTEntry* tte ) |
| 2302 | { |
| 2303 | return ((ULong)tte->weight) * ((ULong)tte->count); |
| 2304 | } |
| 2305 | |
sewardj | 17c5e2e | 2012-12-28 09:12:14 +0000 | [diff] [blame] | 2306 | ULong VG_(get_SB_profile) ( SBProfEntry tops[], UInt n_tops ) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2307 | { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2308 | Int sno, i, r, s; |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2309 | ULong score_total; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2310 | |
| 2311 | /* First, compute the total weighted count, and find the top N |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2312 | ttes. tops contains pointers to the most-used n_tops blocks, in |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2313 | descending order (viz, tops[0] is the highest scorer). */ |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2314 | for (i = 0; i < n_tops; i++) { |
| 2315 | tops[i].addr = 0; |
| 2316 | tops[i].score = 0; |
| 2317 | } |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2318 | |
| 2319 | score_total = 0; |
| 2320 | |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2321 | for (sno = 0; sno < n_sectors; sno++) { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2322 | if (sectors[sno].tc == NULL) |
| 2323 | continue; |
| 2324 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
| 2325 | if (sectors[sno].tt[i].status != InUse) |
| 2326 | continue; |
| 2327 | score_total += score(§ors[sno].tt[i]); |
| 2328 | /* Find the rank for sectors[sno].tt[i]. */ |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2329 | r = n_tops-1; |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2330 | while (True) { |
| 2331 | if (r == -1) |
| 2332 | break; |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2333 | if (tops[r].addr == 0) { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2334 | r--; |
| 2335 | continue; |
| 2336 | } |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2337 | if ( score(§ors[sno].tt[i]) > tops[r].score ) { |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2338 | r--; |
| 2339 | continue; |
| 2340 | } |
| 2341 | break; |
| 2342 | } |
| 2343 | r++; |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2344 | vg_assert(r >= 0 && r <= n_tops); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2345 | /* This bb should be placed at r, and bbs above it shifted |
| 2346 | upwards one slot. */ |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2347 | if (r < n_tops) { |
| 2348 | for (s = n_tops-1; s > r; s--) |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2349 | tops[s] = tops[s-1]; |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2350 | tops[r].addr = sectors[sno].tt[i].entry; |
| 2351 | tops[r].score = score( §ors[sno].tt[i] ); |
sewardj | fa8ec11 | 2005-01-19 11:55:34 +0000 | [diff] [blame] | 2352 | } |
| 2353 | } |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2354 | } |
| 2355 | |
sewardj | 17c5e2e | 2012-12-28 09:12:14 +0000 | [diff] [blame] | 2356 | /* Now zero out all the counter fields, so that we can make |
| 2357 | multiple calls here and just get the values since the last call, |
| 2358 | each time, rather than values accumulated for the whole run. */ |
philippe | 8e1bee4 | 2013-10-18 00:08:20 +0000 | [diff] [blame] | 2359 | for (sno = 0; sno < n_sectors; sno++) { |
sewardj | 17c5e2e | 2012-12-28 09:12:14 +0000 | [diff] [blame] | 2360 | if (sectors[sno].tc == NULL) |
| 2361 | continue; |
| 2362 | for (i = 0; i < N_TTES_PER_SECTOR; i++) { |
| 2363 | if (sectors[sno].tt[i].status != InUse) |
| 2364 | continue; |
| 2365 | sectors[sno].tt[i].count = 0; |
| 2366 | } |
| 2367 | } |
| 2368 | |
njn | 2025cf9 | 2005-06-26 20:44:48 +0000 | [diff] [blame] | 2369 | return score_total; |
sewardj | c0d8f68 | 2002-11-30 00:49:43 +0000 | [diff] [blame] | 2370 | } |
| 2371 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2372 | /*--------------------------------------------------------------------*/ |
njn | 8bddf58 | 2005-05-13 23:40:55 +0000 | [diff] [blame] | 2373 | /*--- end ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2374 | /*--------------------------------------------------------------------*/ |