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-rw-r--r--otautil/include/otautil/rangeset.h42
-rw-r--r--otautil/rangeset.cpp85
-rw-r--r--tests/unit/rangeset_test.cpp78
-rw-r--r--updater/blockimg.cpp20
4 files changed, 170 insertions, 55 deletions
diff --git a/otautil/include/otautil/rangeset.h b/otautil/include/otautil/rangeset.h
index c4234d181..af8ae2dee 100644
--- a/otautil/include/otautil/rangeset.h
+++ b/otautil/include/otautil/rangeset.h
@@ -30,28 +30,35 @@ class RangeSet {
explicit RangeSet(std::vector<Range>&& pairs);
+ // Parses the given string into a RangeSet. Returns the parsed RangeSet, or an empty RangeSet on
+ // errors.
static RangeSet Parse(const std::string& range_text);
+ // Appends the given Range to the current RangeSet.
+ bool PushBack(Range range);
+
+ // Clears all the ranges from the RangeSet.
+ void Clear();
+
std::string ToString() const;
- // Get the block number for the i-th (starting from 0) block in the RangeSet.
+ // Gets the block number for the i-th (starting from 0) block in the RangeSet.
size_t GetBlockNumber(size_t idx) const;
- // RangeSet has half-closed half-open bounds. For example, "3,5" contains blocks 3 and 4. So "3,5"
- // and "5,7" are not overlapped.
+ // Returns whether the current RangeSet overlaps with other. RangeSet has half-closed half-open
+ // bounds. For example, "3,5" contains blocks 3 and 4. So "3,5" and "5,7" are not overlapped.
bool Overlaps(const RangeSet& other) const;
- // size() gives the number of Range's in this RangeSet.
+ // Returns the number of Range's in this RangeSet.
size_t size() const {
return ranges_.size();
}
- // blocks() gives the number of all blocks in this RangeSet.
+ // Returns the total number of blocks in this RangeSet.
size_t blocks() const {
return blocks_;
}
- // We provide const iterators only.
std::vector<Range>::const_iterator cbegin() const {
return ranges_.cbegin();
}
@@ -60,13 +67,20 @@ class RangeSet {
return ranges_.cend();
}
- // Need to provide begin()/end() since range-based loop expects begin()/end().
+ std::vector<Range>::iterator begin() {
+ return ranges_.begin();
+ }
+
+ std::vector<Range>::iterator end() {
+ return ranges_.end();
+ }
+
std::vector<Range>::const_iterator begin() const {
- return ranges_.cbegin();
+ return ranges_.begin();
}
std::vector<Range>::const_iterator end() const {
- return ranges_.cend();
+ return ranges_.end();
}
// Reverse const iterators for MoveRange().
@@ -78,6 +92,11 @@ class RangeSet {
return ranges_.crend();
}
+ // Returns whether the RangeSet is valid (i.e. non-empty).
+ explicit operator bool() const {
+ return !ranges_.empty();
+ }
+
const Range& operator[](size_t i) const {
return ranges_[i];
}
@@ -109,6 +128,9 @@ class RangeSet {
// every block in the original source.
class SortedRangeSet : public RangeSet {
public:
+ // The block size when working with offset and file length.
+ static constexpr size_t kBlockSize = 4096;
+
SortedRangeSet() {}
// Ranges in the the set should be mutually exclusive; and they're sorted by the start block.
@@ -122,8 +144,6 @@ class SortedRangeSet : public RangeSet {
// Compute the block range the file occupies, and insert that range.
void Insert(size_t start, size_t len);
- void Clear();
-
using RangeSet::Overlaps;
bool Overlaps(size_t start, size_t len) const;
diff --git a/otautil/rangeset.cpp b/otautil/rangeset.cpp
index a121a4efc..532cba4a8 100644
--- a/otautil/rangeset.cpp
+++ b/otautil/rangeset.cpp
@@ -16,8 +16,10 @@
#include "otautil/rangeset.h"
+#include <limits.h>
#include <stddef.h>
+#include <algorithm>
#include <string>
#include <utility>
#include <vector>
@@ -28,47 +30,79 @@
#include <android-base/strings.h>
RangeSet::RangeSet(std::vector<Range>&& pairs) {
- CHECK_NE(pairs.size(), static_cast<size_t>(0)) << "Invalid number of tokens";
+ blocks_ = 0;
+ if (pairs.empty()) {
+ LOG(ERROR) << "Invalid number of tokens";
+ return;
+ }
- // Sanity check the input.
- size_t result = 0;
for (const auto& range : pairs) {
- CHECK_LT(range.first, range.second) << "Empty or negative range: " << range.first << ", "
- << range.second;
- size_t sz = range.second - range.first;
- CHECK_LE(result, SIZE_MAX - sz) << "RangeSet size overflow";
- result += sz;
+ if (!PushBack(range)) {
+ Clear();
+ return;
+ }
}
-
- ranges_ = pairs;
- blocks_ = result;
}
RangeSet RangeSet::Parse(const std::string& range_text) {
std::vector<std::string> pieces = android::base::Split(range_text, ",");
- CHECK_GE(pieces.size(), static_cast<size_t>(3)) << "Invalid range text: " << range_text;
+ if (pieces.size() < 3) {
+ LOG(ERROR) << "Invalid range text: " << range_text;
+ return {};
+ }
size_t num;
- CHECK(android::base::ParseUint(pieces[0], &num, static_cast<size_t>(INT_MAX)))
- << "Failed to parse the number of tokens: " << range_text;
-
- CHECK_NE(num, static_cast<size_t>(0)) << "Invalid number of tokens: " << range_text;
- CHECK_EQ(num % 2, static_cast<size_t>(0)) << "Number of tokens must be even: " << range_text;
- CHECK_EQ(num, pieces.size() - 1) << "Mismatching number of tokens: " << range_text;
+ if (!android::base::ParseUint(pieces[0], &num, static_cast<size_t>(INT_MAX))) {
+ LOG(ERROR) << "Failed to parse the number of tokens: " << range_text;
+ return {};
+ }
+ if (num == 0) {
+ LOG(ERROR) << "Invalid number of tokens: " << range_text;
+ return {};
+ }
+ if (num % 2 != 0) {
+ LOG(ERROR) << "Number of tokens must be even: " << range_text;
+ return {};
+ }
+ if (num != pieces.size() - 1) {
+ LOG(ERROR) << "Mismatching number of tokens: " << range_text;
+ return {};
+ }
std::vector<Range> pairs;
for (size_t i = 0; i < num; i += 2) {
size_t first;
- CHECK(android::base::ParseUint(pieces[i + 1], &first, static_cast<size_t>(INT_MAX)));
size_t second;
- CHECK(android::base::ParseUint(pieces[i + 2], &second, static_cast<size_t>(INT_MAX)));
-
+ if (!android::base::ParseUint(pieces[i + 1], &first, static_cast<size_t>(INT_MAX)) ||
+ !android::base::ParseUint(pieces[i + 2], &second, static_cast<size_t>(INT_MAX))) {
+ return {};
+ }
pairs.emplace_back(first, second);
}
-
return RangeSet(std::move(pairs));
}
+bool RangeSet::PushBack(Range range) {
+ if (range.first >= range.second) {
+ LOG(ERROR) << "Empty or negative range: " << range.first << ", " << range.second;
+ return false;
+ }
+ size_t sz = range.second - range.first;
+ if (blocks_ >= SIZE_MAX - sz) {
+ LOG(ERROR) << "RangeSet size overflow";
+ return false;
+ }
+
+ ranges_.push_back(std::move(range));
+ blocks_ += sz;
+ return true;
+}
+
+void RangeSet::Clear() {
+ ranges_.clear();
+ blocks_ = 0;
+}
+
std::string RangeSet::ToString() const {
if (ranges_.empty()) {
return "";
@@ -114,8 +148,6 @@ bool RangeSet::Overlaps(const RangeSet& other) const {
return false;
}
-static constexpr size_t kBlockSize = 4096;
-
// Ranges in the the set should be mutually exclusive; and they're sorted by the start block.
SortedRangeSet::SortedRangeSet(std::vector<Range>&& pairs) : RangeSet(std::move(pairs)) {
std::sort(ranges_.begin(), ranges_.end());
@@ -158,11 +190,6 @@ void SortedRangeSet::Insert(size_t start, size_t len) {
Insert(to_insert);
}
-void SortedRangeSet::Clear() {
- blocks_ = 0;
- ranges_.clear();
-}
-
bool SortedRangeSet::Overlaps(size_t start, size_t len) const {
RangeSet rs({ { start / kBlockSize, (start + len - 1) / kBlockSize + 1 } });
return Overlaps(rs);
diff --git a/tests/unit/rangeset_test.cpp b/tests/unit/rangeset_test.cpp
index b3ed99215..5141bb67f 100644
--- a/tests/unit/rangeset_test.cpp
+++ b/tests/unit/rangeset_test.cpp
@@ -17,12 +17,24 @@
#include <signal.h>
#include <sys/types.h>
+#include <limits>
#include <vector>
#include <gtest/gtest.h>
#include "otautil/rangeset.h"
+TEST(RangeSetTest, ctor) {
+ RangeSet rs(std::vector<Range>{ Range{ 8, 10 }, Range{ 1, 5 } });
+ ASSERT_TRUE(rs);
+
+ RangeSet rs2(std::vector<Range>{});
+ ASSERT_FALSE(rs2);
+
+ RangeSet rs3(std::vector<Range>{ Range{ 8, 10 }, Range{ 5, 1 } });
+ ASSERT_FALSE(rs3);
+}
+
TEST(RangeSetTest, Parse_smoke) {
RangeSet rs = RangeSet::Parse("2,1,10");
ASSERT_EQ(static_cast<size_t>(1), rs.size());
@@ -37,27 +49,64 @@ TEST(RangeSetTest, Parse_smoke) {
// Leading zeros are fine. But android::base::ParseUint() doesn't like trailing zeros like "10 ".
ASSERT_EQ(rs, RangeSet::Parse(" 2, 1, 10"));
- ASSERT_EXIT(RangeSet::Parse("2,1,10 "), ::testing::KilledBySignal(SIGABRT), "");
+ ASSERT_FALSE(RangeSet::Parse("2,1,10 "));
}
TEST(RangeSetTest, Parse_InvalidCases) {
// Insufficient number of tokens.
- ASSERT_EXIT(RangeSet::Parse(""), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("2,1"), ::testing::KilledBySignal(SIGABRT), "");
+ ASSERT_FALSE(RangeSet::Parse(""));
+ ASSERT_FALSE(RangeSet::Parse("2,1"));
// The first token (i.e. the number of following tokens) is invalid.
- ASSERT_EXIT(RangeSet::Parse("a,1,1"), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("3,1,1"), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("-3,1,1"), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("2,1,2,3"), ::testing::KilledBySignal(SIGABRT), "");
+ ASSERT_FALSE(RangeSet::Parse("a,1,1"));
+ ASSERT_FALSE(RangeSet::Parse("3,1,1"));
+ ASSERT_FALSE(RangeSet::Parse("-3,1,1"));
+ ASSERT_FALSE(RangeSet::Parse("2,1,2,3"));
// Invalid tokens.
- ASSERT_EXIT(RangeSet::Parse("2,1,10a"), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("2,,10"), ::testing::KilledBySignal(SIGABRT), "");
+ ASSERT_FALSE(RangeSet::Parse("2,1,10a"));
+ ASSERT_FALSE(RangeSet::Parse("2,,10"));
// Empty or negative range.
- ASSERT_EXIT(RangeSet::Parse("2,2,2"), ::testing::KilledBySignal(SIGABRT), "");
- ASSERT_EXIT(RangeSet::Parse("2,2,1"), ::testing::KilledBySignal(SIGABRT), "");
+ ASSERT_FALSE(RangeSet::Parse("2,2,2"));
+ ASSERT_FALSE(RangeSet::Parse("2,2,1"));
+}
+
+TEST(RangeSetTest, Clear) {
+ RangeSet rs = RangeSet::Parse("2,1,6");
+ ASSERT_TRUE(rs);
+ rs.Clear();
+ ASSERT_FALSE(rs);
+
+ // No-op to clear an empty RangeSet.
+ rs.Clear();
+ ASSERT_FALSE(rs);
+}
+
+TEST(RangeSetTest, PushBack) {
+ RangeSet rs;
+ ASSERT_FALSE(rs);
+
+ ASSERT_TRUE(rs.PushBack({ 3, 5 }));
+ ASSERT_EQ(RangeSet::Parse("2,3,5"), rs);
+
+ ASSERT_TRUE(rs.PushBack({ 5, 15 }));
+ ASSERT_EQ(RangeSet::Parse("4,3,5,5,15"), rs);
+ ASSERT_EQ(static_cast<size_t>(2), rs.size());
+ ASSERT_EQ(static_cast<size_t>(12), rs.blocks());
+}
+
+TEST(RangeSetTest, PushBack_InvalidInput) {
+ RangeSet rs;
+ ASSERT_FALSE(rs);
+ ASSERT_FALSE(rs.PushBack({ 5, 3 }));
+ ASSERT_FALSE(rs);
+ ASSERT_FALSE(rs.PushBack({ 15, 15 }));
+ ASSERT_FALSE(rs);
+
+ ASSERT_TRUE(rs.PushBack({ 5, 15 }));
+ ASSERT_FALSE(rs.PushBack({ 5, std::numeric_limits<size_t>::max() - 2 }));
+ ASSERT_EQ(RangeSet::Parse("2,5,15"), rs);
}
TEST(RangeSetTest, Overlaps) {
@@ -90,7 +139,7 @@ TEST(RangeSetTest, equality) {
ASSERT_NE(RangeSet::Parse("2,1,6"), RangeSet::Parse("2,1,7"));
ASSERT_NE(RangeSet::Parse("2,1,6"), RangeSet::Parse("2,2,7"));
- // The orders of Range's matter. "4,1,5,8,10" != "4,8,10,1,5".
+ // The orders of Range's matter, e.g. "4,1,5,8,10" != "4,8,10,1,5".
ASSERT_NE(RangeSet::Parse("4,1,5,8,10"), RangeSet::Parse("4,8,10,1,5"));
}
@@ -111,13 +160,14 @@ TEST(RangeSetTest, iterators) {
ASSERT_EQ((std::vector<Range>{ Range{ 8, 10 }, Range{ 1, 5 } }), ranges);
}
-TEST(RangeSetTest, tostring) {
+TEST(RangeSetTest, ToString) {
+ ASSERT_EQ("", RangeSet::Parse("").ToString());
ASSERT_EQ("2,1,6", RangeSet::Parse("2,1,6").ToString());
ASSERT_EQ("4,1,5,8,10", RangeSet::Parse("4,1,5,8,10").ToString());
ASSERT_EQ("6,1,3,4,6,15,22", RangeSet::Parse("6,1,3,4,6,15,22").ToString());
}
-TEST(SortedRangeSetTest, insertion) {
+TEST(SortedRangeSetTest, Insert) {
SortedRangeSet rs({ { 2, 3 }, { 4, 6 }, { 8, 14 } });
rs.Insert({ 1, 2 });
ASSERT_EQ(SortedRangeSet({ { 1, 3 }, { 4, 6 }, { 8, 14 } }), rs);
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index 6c7b3efcf..1c931afef 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -492,6 +492,10 @@ static void PrintHashForCorruptedSourceBlocks(const CommandParameters& params,
}
RangeSet src = RangeSet::Parse(params.tokens[pos++]);
+ if (!src) {
+ LOG(ERROR) << "Failed to parse range in " << params.cmdline;
+ return;
+ }
RangeSet locs;
// If there's no stashed blocks, content in the buffer is consecutive and has the same
@@ -936,6 +940,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
params.cpos++;
} else {
RangeSet src = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(src));
*overlap = src.Overlaps(tgt);
if (ReadBlocks(src, params.buffer, params.fd) == -1) {
@@ -948,6 +953,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
}
RangeSet locs = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(locs));
MoveRange(params.buffer, locs, params.buffer);
}
@@ -970,6 +976,7 @@ static int LoadSourceBlocks(CommandParameters& params, const RangeSet& tgt, size
}
RangeSet locs = RangeSet::Parse(tokens[1]);
+ CHECK(static_cast<bool>(locs));
MoveRange(params.buffer, locs, stash);
}
@@ -1034,6 +1041,7 @@ static int LoadSrcTgtVersion3(CommandParameters& params, RangeSet& tgt, size_t*
// <tgt_range>
tgt = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(tgt));
std::vector<uint8_t> tgtbuffer(tgt.blocks() * BLOCKSIZE);
if (ReadBlocks(tgt, tgtbuffer, params.fd) == -1) {
@@ -1146,6 +1154,7 @@ static int PerformCommandStash(CommandParameters& params) {
}
RangeSet src = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(src));
allocate(src.blocks() * BLOCKSIZE, params.buffer);
if (ReadBlocks(src, params.buffer, params.fd) == -1) {
@@ -1196,6 +1205,7 @@ static int PerformCommandZero(CommandParameters& params) {
}
RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(tgt));
LOG(INFO) << " zeroing " << tgt.blocks() << " blocks";
@@ -1238,6 +1248,7 @@ static int PerformCommandNew(CommandParameters& params) {
}
RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(tgt));
if (params.canwrite) {
LOG(INFO) << " writing " << tgt.blocks() << " blocks of new data";
@@ -1368,6 +1379,7 @@ static int PerformCommandErase(CommandParameters& params) {
}
RangeSet tgt = RangeSet::Parse(params.tokens[params.cpos++]);
+ CHECK(static_cast<bool>(tgt));
if (params.canwrite) {
LOG(INFO) << " erasing " << tgt.blocks() << " blocks";
@@ -1773,6 +1785,7 @@ Value* RangeSha1Fn(const char* name, State* state, const std::vector<std::unique
}
RangeSet rs = RangeSet::Parse(ranges->data);
+ CHECK(static_cast<bool>(rs));
SHA_CTX ctx;
SHA1_Init(&ctx);
@@ -1884,6 +1897,11 @@ Value* BlockImageRecoverFn(const char* name, State* state,
ErrorAbort(state, kArgsParsingFailure, "ranges argument to %s must be string", name);
return StringValue("");
}
+ RangeSet rs = RangeSet::Parse(ranges->data);
+ if (!rs) {
+ ErrorAbort(state, kArgsParsingFailure, "failed to parse ranges: %s", ranges->data.c_str());
+ return StringValue("");
+ }
// Output notice to log when recover is attempted
LOG(INFO) << filename->data << " image corrupted, attempting to recover...";
@@ -1909,7 +1927,7 @@ Value* BlockImageRecoverFn(const char* name, State* state,
}
uint8_t buffer[BLOCKSIZE];
- for (const auto& range : RangeSet::Parse(ranges->data)) {
+ for (const auto& range : rs) {
for (size_t j = range.first; j < range.second; ++j) {
// Stay within the data area, libfec validates and corrects metadata
if (status.data_size <= static_cast<uint64_t>(j) * BLOCKSIZE) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 19:50:31 +0100