From: drh <>
Date: Tue, 3 May 2022 12:11:16 +0000 (+0000)
Subject: Add assert()s to show that jumps always land an an instruction that is between
X-Git-Tag: version-3.39.0~173
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=207f6263569835b649b1f472e12dacba8ee6a21b;p=thirdparty%2Fsqlite.git

Add assert()s to show that jumps always land an an instruction that is between
1 and Vdbe.nOp-1.  Had these assert()s been in place before, they would have
caused an assertion fault for the byte-code error reported by
[forum:/forumpost/2482b32700|forum post 2482b32700].

FossilOrigin-Name: 8f8a58feb7047d19522ca32efbe42fd9ddf49aaf9064f7373eb56a88982406a2
---

diff --git a/manifest b/manifest
index 5c3330d792..6f5ed17f42 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\sa\stestcase()\smacro\staht\swas\smade\sobsolete\sby\s[a8da85c57e07721d].
-D 2022-05-02T15:47:57.110
+C Add\sassert()s\sto\sshow\sthat\sjumps\salways\sland\san\san\sinstruction\sthat\sis\sbetween\n1\sand\sVdbe.nOp-1.\s\sHad\sthese\sassert()s\sbeen\sin\splace\sbefore,\sthey\swould\shave\ncaused\san\sassertion\sfault\sfor\sthe\sbyte-code\serror\sreported\sby\n[forum:/forumpost/2482b32700|forum\spost\s2482b32700].
+D 2022-05-03T12:11:16.206
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -625,7 +625,7 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
 F src/vacuum.c 6c38ddc52f0619865c91dae9c441d4d48bf3040d7dc1bc5b22da1e45547ed0b3
-F src/vdbe.c 9527ab7f71c5b0291e5ed7727f213f4d7f6e0a82af019da5b365fd5a0f56bb96
+F src/vdbe.c a6a20956fa128c0b8d3c5592a9a3db890a46cf626f46ffee0cab2ac5bf8d04b2
 F src/vdbe.h 07641758ca8b4f4c6d81ea667ea167c541e6ece21f5574da11e3d21ec37e2662
 F src/vdbeInt.h ef43f7fdc5fde29fc3fd29c506c12830f366178fdb4edbbf0cbc3dfbd1278b5f
 F src/vdbeapi.c 354c893f1500cf524cc45c32879b9c68893a28b77e3442c24668d6afe4236217
@@ -1951,8 +1951,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P bcaa4a44749d157c5953c6f54c88b1ba29b4035f4b21fce986b7efbea372e109
-R e9ba3eaded9a5b3eaa4edaa039c7ca25
+P 053cf45ecaa7eac8cc64c7b2672807f736a45575a84b426263b2e1feb060b401
+R ac9704868f7c1c02692fbf03e14bf6d3
 U drh
-Z 097076191b03601e3038661a0fda0c02
+Z 2799ccc42c2b61451a2da6d606baab94
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index da0a44df88..039e77d8b3 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-053cf45ecaa7eac8cc64c7b2672807f736a45575a84b426263b2e1feb060b401
\ No newline at end of file
+8f8a58feb7047d19522ca32efbe42fd9ddf49aaf9064f7373eb56a88982406a2
\ No newline at end of file
diff --git a/src/vdbe.c b/src/vdbe.c
index 087a837955..589f5df9f5 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -1043,6 +1043,8 @@ case OP_InitCoroutine: {     /* jump */
   /* Most jump operations do a goto to this spot in order to update
   ** the pOp pointer. */
 jump_to_p2:
+  assert( pOp->p2>0 );       /* There are never any jumps to instruction 0 */
+  assert( pOp->p2<p->nOp );  /* Jumps must be in range */
   pOp = &aOp[pOp->p2 - 1];
   break;
 }