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added patch to last bug

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Roberto Ierusalimschy 2013-05-16 13:03:50 -03:00
parent b5ec26101f
commit 2d6a0ae149
1 changed files with 71 additions and 2 deletions
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@ -1880,8 +1880,8 @@ patch = [[
+++ lundump.c 2008/04/04 19:51:41 2.7.1.4 +++ lundump.c 2008/04/04 19:51:41 2.7.1.4
@@ -1,5 +1,5 @@ @@ -1,5 +1,5 @@
/* /*
-** $Id: bugs,v 1.122 2013/05/06 17:21:28 roberto Exp roberto $ -** $Id: bugs,v 1.123 2013/05/13 16:17:47 roberto Exp roberto $
+** $Id: bugs,v 1.122 2013/05/06 17:21:28 roberto Exp roberto $ +** $Id: bugs,v 1.123 2013/05/13 16:17:47 roberto Exp roberto $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -2953,6 +2953,75 @@ stdin:1: attempt to call a boolean value (global 'c')
(It should be global 'b' instead of 'c'.) (It should be global 'b' instead of 'c'.)
]], ]],
patch = [[ patch = [[
--- ldebug.c 2013/05/06 17:20:22 2.90.1.2
+++ ldebug.c 2013/05/14 19:52:48
@@ -327,12 +327,20 @@
}
+static int filterpc (int pc, int jmptarget) {
+ if (pc < jmptarget) /* is code conditional (inside a jump)? */
+ return -1; /* cannot know who sets that register */
+ else return pc; /* current position sets that register */
+}
+
+
/*
** try to find last instruction before 'lastpc' that modified register 'reg'
*/
static int findsetreg (Proto *p, int lastpc, int reg) {
int pc;
int setreg = -1; /* keep last instruction that changed 'reg' */
+ int jmptarget = 0; /* any code before this address is conditional */
for (pc = 0; pc < lastpc; pc++) {
Instruction i = p->code[pc];
OpCode op = GET_OPCODE(i);
@@ -341,33 +349,38 @@
case OP_LOADNIL: {
int b = GETARG_B(i);
if (a <= reg && reg <= a + b) /* set registers from 'a' to 'a+b' */
- setreg = pc;
+ setreg = filterpc(pc, jmptarget);
break;
}
case OP_TFORCALL: {
- if (reg >= a + 2) setreg = pc; /* affect all regs above its base */
+ if (reg >= a + 2) /* affect all regs above its base */
+ setreg = filterpc(pc, jmptarget);
break;
}
case OP_CALL:
case OP_TAILCALL: {
- if (reg >= a) setreg = pc; /* affect all registers above base */
+ if (reg >= a) /* affect all registers above base */
+ setreg = filterpc(pc, jmptarget);
break;
}
case OP_JMP: {
int b = GETARG_sBx(i);
int dest = pc + 1 + b;
/* jump is forward and do not skip `lastpc'? */
- if (pc < dest && dest <= lastpc)
- pc += b; /* do the jump */
+ if (pc < dest && dest <= lastpc) {
+ if (dest > jmptarget)
+ jmptarget = dest; /* update 'jmptarget' */
+ }
break;
}
case OP_TEST: {
- if (reg == a) setreg = pc; /* jumped code can change 'a' */
+ if (reg == a) /* jumped code can change 'a' */
+ setreg = filterpc(pc, jmptarget);
break;
}
default:
if (testAMode(op) && reg == a) /* any instruction that set A */
- setreg = pc;
+ setreg = filterpc(pc, jmptarget);
break;
}
}
]] ]]
} }