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Bytecode instructions like PUSH_L (push a local variable) contain an operand that refers to the stack slot. Before this patch, the operand type was SmallOp (Word16), limiting the maximum stack offset to 65535 words. This could cause compiler panics in some cases (See #22888). This patch changes the operand type for stack offsets from SmallOp to Op, removing the stack offset limit. Fixes #22888 (cherry picked from commit 564164ef)
Bytecode instructions like PUSH_L (push a local variable) contain an operand that refers to the stack slot. Before this patch, the operand type was SmallOp (Word16), limiting the maximum stack offset to 65535 words. This could cause compiler panics in some cases (See #22888). This patch changes the operand type for stack offsets from SmallOp to Op, removing the stack offset limit. Fixes #22888 (cherry picked from commit 564164ef)
Disassembler.c 16.47 KiB
/* -----------------------------------------------------------------------------
* Bytecode disassembler
*
* Copyright (c) 1994-2002.
*
* $RCSfile: Disassembler.c,v $
* $Revision: 1.29 $
* $Date: 2004/09/03 15:28:19 $
* ---------------------------------------------------------------------------*/
#if defined(DEBUG)
#include "rts/PosixSource.h"
#include "Rts.h"
#include "RtsAPI.h"
#include "rts/Bytecodes.h"
#include "RtsUtils.h"
#include "Schedule.h"
#include "Printer.h"
#include "Disassembler.h"
#include "Interpreter.h"
/* --------------------------------------------------------------------------
* Disassembler
* ------------------------------------------------------------------------*/
int
disInstr ( StgBCO *bco, int pc )
{
StgWord16 instr;
StgWord16* instrs = (StgWord16*)(bco->instrs->payload);
StgArrBytes* literal_arr = bco->literals;
StgWord* literals = (StgWord*)(&literal_arr->payload[0]);
StgMutArrPtrs* ptrs_arr = bco->ptrs;
StgPtr* ptrs = (StgPtr*)(&ptrs_arr->payload[0]);
instr = instrs[pc++];
if (instr & bci_FLAG_LARGE_ARGS) {
debugBelch ("LARGE ");
}
#define BCO_NEXT instrs[pc++]
#define BCO_NEXT_32 (pc += 2)
#define BCO_READ_NEXT_32 (BCO_NEXT_32, (((StgWord) instrs[pc-2]) << 16) \
+ ( (StgWord) instrs[pc-1]))
#define BCO_NEXT_64 (pc += 4)
#define BCO_READ_NEXT_64 (BCO_NEXT_64, (((StgWord) instrs[pc-4]) << 48) \
+ (((StgWord) instrs[pc-3]) << 32) \
+ (((StgWord) instrs[pc-2]) << 16) \
+ ( (StgWord) instrs[pc-1]))
#if WORD_SIZE_IN_BITS == 32
#define BCO_NEXT_WORD BCO_NEXT_32
#define BCO_READ_NEXT_WORD BCO_READ_NEXT_32
#elif WORD_SIZE_IN_BITS == 64
#define BCO_NEXT_WORD BCO_NEXT_64
#define BCO_READ_NEXT_WORD BCO_READ_NEXT_64
#else
#error Cannot cope with WORD_SIZE_IN_BITS being nether 32 nor 64
#endif
#define BCO_GET_LARGE_ARG ((instr & bci_FLAG_LARGE_ARGS) ? BCO_READ_NEXT_WORD : BCO_NEXT)
switch (instr & 0xff) {
case bci_BRK_FUN:
debugBelch ("BRK_FUN " ); printPtr( ptrs[instrs[pc]] );
debugBelch (" %d ", instrs[pc+1]); printPtr( ptrs[instrs[pc+2]] );
CostCentre* cc = (CostCentre*)literals[instrs[pc+3]]; if (cc) {
debugBelch(" %s", cc->label);
}
debugBelch("\n");
pc += 4;
break;
case bci_SWIZZLE: {
W_ stkoff = BCO_GET_LARGE_ARG;
StgInt by = BCO_GET_LARGE_ARG;
debugBelch("SWIZZLE stkoff %" FMT_Word " by %" FMT_Int "\n", stkoff, by);
break; }
case bci_CCALL: {
debugBelch("CCALL marshaller at 0x%" FMT_HexWord "\n",
literals[instrs[pc]] );
pc += 1; break; }
case bci_PRIMCALL:
debugBelch("PRIMCALL\n");
break;
case bci_STKCHECK: {
StgWord stk_words_reqd = BCO_GET_LARGE_ARG + 1;
debugBelch("STKCHECK %" FMT_Word "\n", (W_)stk_words_reqd );
break;
}
case bci_PUSH_L: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH_L %" FMT_Word "\n", x1 );
break; }
case bci_PUSH_LL: {
W_ x1 = BCO_GET_LARGE_ARG;
W_ x2 = BCO_GET_LARGE_ARG;
debugBelch("PUSH_LL %" FMT_Word " %" FMT_Word "\n", x1, x2 );
break; }
case bci_PUSH_LLL: {
W_ x1 = BCO_GET_LARGE_ARG;
W_ x2 = BCO_GET_LARGE_ARG;
W_ x3 = BCO_GET_LARGE_ARG;
debugBelch("PUSH_LLL %" FMT_Word " %" FMT_Word " %" FMT_Word "\n", x1, x2, x3);
break; }
case bci_PUSH8: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH8 %" FMT_Word "\n", x1 );
break; }
case bci_PUSH16: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH16 %" FMT_Word "\n", x1 );
break; }
case bci_PUSH32: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH32 %" FMT_Word "\n", x1 );
break; }
case bci_PUSH8_W: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH8_W %" FMT_Word "\n", x1 );
break; }
case bci_PUSH16_W: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH16_W %" FMT_Word "\n", x1 );
break; }
case bci_PUSH32_W: {
W_ x1 = BCO_GET_LARGE_ARG;
debugBelch("PUSH32_W %" FMT_Word "\n", x1 );
break; }
case bci_PUSH_G:
debugBelch("PUSH_G " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n" );
pc += 1; break;
case bci_PUSH_ALTS_P:
debugBelch("PUSH_ALTS_P " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break; case bci_PUSH_ALTS_N:
debugBelch("PUSH_ALTS_N " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_F:
debugBelch("PUSH_ALTS_F " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_D:
debugBelch("PUSH_ALTS_D " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_L:
debugBelch("PUSH_ALTS_L " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_V:
debugBelch("PUSH_ALTS_V " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_T:
debugBelch("PUSH_ALTS_T ");
printPtr( ptrs[instrs[pc]] );
debugBelch(" 0x%" FMT_HexWord " ", literals[instrs[pc+1]] );
printPtr( ptrs[instrs[pc+2]] );
debugBelch("\n");
pc += 3; break;
case bci_PUSH_PAD8:
debugBelch("PUSH_PAD8\n");
pc += 1; break;
case bci_PUSH_PAD16:
debugBelch("PUSH_PAD16\n");
pc += 1; break;
case bci_PUSH_PAD32:
debugBelch("PUSH_PAD32\n");
pc += 1; break;
case bci_PUSH_UBX8:
debugBelch(
"PUSH_UBX8 0x%" FMT_HexWord8 "\n",
(StgWord8) literals[instrs[pc]] );
pc += 1; break;
case bci_PUSH_UBX16:
debugBelch(
"PUSH_UBX16 0x%" FMT_HexWord16 "\n",
(StgWord16) literals[instrs[pc]] );
pc += 1; break;
case bci_PUSH_UBX32:
debugBelch(
"PUSH_UBX32 0x%" FMT_HexWord32 "\n",
(StgWord32) literals[instrs[pc]] );
pc += 1; break;
case bci_PUSH_UBX: {
debugBelch("PUSH_UBX ");
W_ offset = BCO_GET_LARGE_ARG;
W_ nwords = BCO_GET_LARGE_ARG;
for (W_ i = 0; i < nwords; i++)
debugBelch("0x%" FMT_HexWord " ", literals[i + offset] );
debugBelch("\n");
break; }
case bci_PUSH_APPLY_N:
debugBelch("PUSH_APPLY_N\n");
break;
case bci_PUSH_APPLY_V:
debugBelch("PUSH_APPLY_V\n");
break;
case bci_PUSH_APPLY_F:
debugBelch("PUSH_APPLY_F\n");
break;
case bci_PUSH_APPLY_D:
debugBelch("PUSH_APPLY_D\n"); break;
case bci_PUSH_APPLY_L:
debugBelch("PUSH_APPLY_L\n");
break;
case bci_PUSH_APPLY_P:
debugBelch("PUSH_APPLY_P\n");
break;
case bci_PUSH_APPLY_PP:
debugBelch("PUSH_APPLY_PP\n");
break;
case bci_PUSH_APPLY_PPP:
debugBelch("PUSH_APPLY_PPP\n");
break;
case bci_PUSH_APPLY_PPPP:
debugBelch("PUSH_APPLY_PPPP\n");
break;
case bci_PUSH_APPLY_PPPPP:
debugBelch("PUSH_APPLY_PPPPP\n");
break;
case bci_PUSH_APPLY_PPPPPP:
debugBelch("PUSH_APPLY_PPPPPP\n");
break;
case bci_SLIDE: {
W_ nwords = BCO_GET_LARGE_ARG;
W_ by = BCO_GET_LARGE_ARG;
debugBelch("SLIDE %" FMT_Word " down by %" FMT_Word "\n", nwords, by );
break; }
case bci_ALLOC_AP: {
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("ALLOC_AP %" FMT_Word " words\n", nwords );
break; }
case bci_ALLOC_AP_NOUPD: {
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("ALLOC_AP_NOUPD %" FMT_Word " words\n", nwords );
break; }
case bci_ALLOC_PAP: {
W_ arity = BCO_GET_LARGE_ARG;
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("ALLOC_PAP %" FMT_Word " arity, %" FMT_Word " words\n",
arity, nwords );
break; }
case bci_MKAP: {
W_ stkoff = BCO_GET_LARGE_ARG;
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("MKAP %" FMT_Word " words, %" FMT_Word " stkoff\n", nwords,
stkoff );
break; }
case bci_MKPAP: {
W_ stkoff = BCO_GET_LARGE_ARG;
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("MKPAP %" FMT_Word " words, %" FMT_Word " stkoff\n", nwords,
stkoff );
break; }
case bci_UNPACK: {
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("UNPACK %" FMT_Word "\n", nwords );
break; }
case bci_PACK: {
int itbl = BCO_NEXT;
W_ nwords = BCO_GET_LARGE_ARG;
debugBelch("PACK %" FMT_Word " words with itbl ", nwords );
printPtr( (StgPtr)literals[itbl] );
debugBelch("\n");
break; }
case bci_TESTLT_I: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I %" FMT_Int ", fail to %d\n", literals[discr], failto);
break; }
case bci_TESTLT_I64: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I64 %" FMT_Int64 ", fail to %d\n", *((StgInt64*)(literals+discr)), failto);
break;
}
case bci_TESTLT_I32: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I32 %" FMT_Int ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTLT_I16: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I16 %" FMT_Int ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTLT_I8: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I8 %" FMT_Int ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTEQ_I:
debugBelch("TESTEQ_I %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_I64:
debugBelch("TESTEQ_I64 %" FMT_Int64 ", fail to %d\n", *((StgInt64*)(literals+instrs[pc])),
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_I32:
debugBelch("TESTEQ_I32 %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_I16:
debugBelch("TESTEQ_I16 %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_I8:
debugBelch("TESTEQ_I8 %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_W: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_W %" FMT_Word ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTLT_W64: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_W64 %" FMT_Word64 ", fail to %d\n", *((StgWord64*)(literals+discr)), failto);
break;
}
case bci_TESTLT_W32: { unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_W32 %" FMT_Word ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTLT_W16: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_W16 %" FMT_Word ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTLT_W8: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_W8 %" FMT_Word ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTEQ_W:
debugBelch("TESTEQ_W %" FMT_Word ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_W64:
debugBelch("TESTEQ_W64 %" FMT_Word64 ", fail to %d\n", *((StgWord64*)(literals+instrs[pc])),
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_W32:
debugBelch("TESTEQ_W32 %" FMT_Word ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_W16:
debugBelch("TESTEQ_W16 %" FMT_Word ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_W8:
debugBelch("TESTEQ_W8 %" FMT_Word ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_F:
debugBelch("TESTLT_F %f, fail to %d\n", *((StgFloat*)literals+instrs[pc]),
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_F:
debugBelch("TESTEQ_F %f, fail to %d\n", *((StgFloat*)literals+instrs[pc]),
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_D:
debugBelch("TESTLT_D %f, fail to %d\n", *((StgDouble*)(literals+instrs[pc])),
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_D:
debugBelch("TESTEQ_D %f, fail to %d\n", *((StgDouble*)(literals+instrs[pc])),
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_P:
debugBelch("TESTLT_P %d, fail to %d\n", instrs[pc],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_P:
debugBelch("TESTEQ_P %d, fail to %d\n", instrs[pc],
instrs[pc+1]); pc += 2; break;
case bci_CASEFAIL:
debugBelch("CASEFAIL\n" );
break;
case bci_JMP:
debugBelch("JMP to %d\n", instrs[pc]);
pc += 1; break;
case bci_ENTER:
debugBelch("ENTER\n");
break;
case bci_RETURN_P:
debugBelch("RETURN_P\n" );
break;
case bci_RETURN_N:
debugBelch("RETURN_N\n" );
break;
case bci_RETURN_F:
debugBelch("RETURN_F\n" );
break;
case bci_RETURN_D:
debugBelch("RETURN_D\n" );
break;
case bci_RETURN_L:
debugBelch("RETURN_L\n" );
break;
case bci_RETURN_V:
debugBelch("RETURN_V\n" );
break;
case bci_RETURN_T:
debugBelch("RETURN_T\n ");
break;
default:
barf("disInstr: unknown opcode %u", (unsigned int) instr);
}
return pc;
}
void disassemble( StgBCO *bco )
{
uint32_t i, j;
StgWord16* instrs = (StgWord16*)(bco->instrs->payload);
StgMutArrPtrs* ptrs = bco->ptrs;
uint32_t nbcs = (uint32_t)(bco->instrs->bytes / sizeof(StgWord16));
uint32_t pc = 1;
debugBelch("BCO\n" );
pc = 0;
while (pc < nbcs) {
debugBelch("\t%2d: ", pc );
pc = disInstr ( bco, pc );
}
debugBelch("INSTRS:\n " );
j = 16;
for (i = 0; i < nbcs; i++) {
debugBelch("%3d ", (int)instrs[i] );
j--;
if (j == 0) { j = 16; debugBelch("\n "); };
}
debugBelch("\n");
debugBelch("PTRS:\n " );
j = 8;
for (i = 0; i < ptrs->ptrs; i++) {
debugBelch("%8p ", ptrs->payload[i] );
j--;
if (j == 0) { j = 8; debugBelch("\n "); }; }
debugBelch("\n");
debugBelch("\n");
}
#endif /* DEBUG */