Fix handling of TYPE_CODE_NUMENTRY record when size large.

unittest/IceParseTypesTest.cpp

+//===- unittest/IceParseTypesTest.cpp -------------------------------------===//
+//     Tests parser for PNaCl bitcode.
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// Tests record errors in the types block when parsing PNaCl bitcode.
+
+// TODO(kschimpf) Add more tests.
+
+#include "BitcodeMunge.h"
+#include "unittests/Bitcode/NaClMungeTest.h"
+
+using namespace llvm;
+using namespace naclmungetest;
+using namespace IceTest;
+
+namespace {
+
+static const unsigned NO_LOCAL_ABBREVS =
+    NaClBitsNeededForValue(naclbitc::DEFAULT_MAX_ABBREV);
+
+const uint64_t BitcodeRecords[] = {
+    naclbitc::ENTER_SUBBLOCK, naclbitc::BLK_CODE_ENTER,
+    naclbitc::MODULE_BLOCK_ID, NO_LOCAL_ABBREVS, Terminator,
+    naclbitc::ENTER_SUBBLOCK, naclbitc::BLK_CODE_ENTER,
+    naclbitc::TYPE_BLOCK_ID_NEW, NO_LOCAL_ABBREVS, Terminator,
+    naclbitc::UNABBREV_RECORD, naclbitc::TYPE_CODE_NUMENTRY, 2, Terminator,
+    naclbitc::UNABBREV_RECORD, naclbitc::TYPE_CODE_INTEGER, 32, Terminator,
+    naclbitc::UNABBREV_RECORD, naclbitc::TYPE_CODE_FLOAT, Terminator,
+    naclbitc::END_BLOCK, naclbitc::BLK_CODE_EXIT, Terminator,
+    naclbitc::END_BLOCK, naclbitc::BLK_CODE_EXIT, Terminator};
+
+const char *ExpectedDump =
+    "       0:0|<65532, 80, 69, 88, 69, 1, 0,|Magic Number: 'PEXE' (80, 69, "
+    "88, 69)\n"
+    "          | 8, 0, 17, 0, 4, 0, 2, 0, 0, |PNaCl Version: 2\n"
+    "          | 0>                          |\n"
+    "      16:0|1: <65535, 8, 2>             |module {  // BlockID = 8\n"
+    "      24:0|  1: <65535, 17, 2>          |  types {  // BlockID = 17\n"
+    "      32:0|    3: <1, 2>                |    count 2;\n"
+    "      34:4|    3: <7, 32>               |    @t0 = i32;\n"
+    "      37:6|    3: <3>                   |    @t1 = float;\n"
+    "      39:4|  0: <65534>                 |  }\n"
+    "      40:0|0: <65534>                   |}\n";
+
+TEST(NaClParseTypesTest, ShowExpectedDump) {
+  NaClObjDumpMunger Munger(ARRAY_TERM(BitcodeRecords));
+  EXPECT_TRUE(Munger.runTest());
+  EXPECT_EQ(ExpectedDump, Munger.getTestResults());
+}
+
+// Show what happens when misdefining: @t1 = float"
+TEST(NaClParseTypesTest, BadFloatTypeDefinition) {
+  // Index for "@t1 = float;" record.
+  const uint64_t FloatTypeIndex = 4;
+  const uint64_t Edit[] = {FloatTypeIndex, NaClMungedBitcode::Replace,
+                           // Add extraneous 1 to end of float record.
+                           naclbitc::UNABBREV_RECORD, naclbitc::TYPE_CODE_FLOAT,
+                           1, Terminator};
+
+  SubzeroBitcodeMunger Munger(ARRAY_TERM(BitcodeRecords));
+  EXPECT_FALSE(Munger.runTest(ARRAY(Edit)));
+  EXPECT_EQ("Error(37:6): Invalid type record: <3 1>\n",
+            Munger.getTestResults());
+}
+
+// Show what happens when the count record value is way too big.
+// See: https://code.google.com/p/nativeclient/issues/detail?id=4195
+TEST(NaClParseTypesTest, BadTypeCountRecord) {
+  // Index for "count 2;".
+  const uint64_t CountRecordIndex = 2;
+  const uint64_t Edit[] = {
+      CountRecordIndex, NaClMungedBitcode::Replace, naclbitc::UNABBREV_RECORD,
+      naclbitc::TYPE_CODE_NUMENTRY, 18446744073709547964ULL, Terminator};
+
+  SubzeroBitcodeMunger Munger(ARRAY_TERM(BitcodeRecords));
+  Munger.Flags.setGenerateUnitTestMessages(false);
+  EXPECT_FALSE(Munger.runTest(ARRAY(Edit)));
+  EXPECT_EQ("Error(32:0): Size to big for count record: 18446744073709547964\n"
+            "Error(48:4): Types block expected 4294963644 types but found: 2\n",
+            Munger.getTestResults());
+}
+
+} // end of anonymous namespace