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authorTao Bao <tbao@google.com>2017-05-03 01:54:02 +0200
committerandroid-build-merger <android-build-merger@google.com>2017-05-03 01:54:02 +0200
commita616f0d4763af7aa9182f1846deb0f959d67b01b (patch)
treee04297c789fd1098489767882d72bbd4cb82636f
parentMerge "recovery: Change install_package() to take std::string." am: ba365180d3 am: c0c4ae1583 am: a0fb95a386 (diff)
parentMerge "Move sysMapFile and sysReleaseMap into MemMapping class." am: fe7eecff4c am: 08d9ede8f2 (diff)
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-rw-r--r--install.cpp6
-rw-r--r--otautil/SysUtil.cpp126
-rw-r--r--otautil/SysUtil.h50
-rw-r--r--tests/component/updater_test.cpp4
-rw-r--r--tests/component/verifier_test.cpp2
-rw-r--r--tests/unit/sysutil_test.cpp60
-rw-r--r--tests/unit/zip_test.cpp5
-rw-r--r--updater/updater.cpp3
8 files changed, 114 insertions, 142 deletions
diff --git a/install.cpp b/install.cpp
index d86f46caa..689f4a0c6 100644
--- a/install.cpp
+++ b/install.cpp
@@ -569,7 +569,7 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
}
MemMapping map;
- if (sysMapFile(path.c_str(), &map) != 0) {
+ if (!map.MapFile(path)) {
LOG(ERROR) << "failed to map file";
return INSTALL_CORRUPT;
}
@@ -577,7 +577,6 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
// Verify package.
if (!verify_package(map.addr, map.length)) {
log_buffer->push_back(android::base::StringPrintf("error: %d", kZipVerificationFailure));
- sysReleaseMap(&map);
return INSTALL_CORRUPT;
}
@@ -588,7 +587,6 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
LOG(ERROR) << "Can't open " << path << " : " << ErrorCodeString(err);
log_buffer->push_back(android::base::StringPrintf("error: %d", kZipOpenFailure));
- sysReleaseMap(&map);
CloseArchive(zip);
return INSTALL_CORRUPT;
}
@@ -596,7 +594,6 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
// Additionally verify the compatibility of the package.
if (!verify_package_compatibility(zip)) {
log_buffer->push_back(android::base::StringPrintf("error: %d", kPackageCompatibilityFailure));
- sysReleaseMap(&map);
CloseArchive(zip);
return INSTALL_CORRUPT;
}
@@ -611,7 +608,6 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
ui->SetEnableReboot(true);
ui->Print("\n");
- sysReleaseMap(&map);
CloseArchive(zip);
return result;
}
diff --git a/otautil/SysUtil.cpp b/otautil/SysUtil.cpp
index a2133b953..dfa215073 100644
--- a/otautil/SysUtil.cpp
+++ b/otautil/SysUtil.cpp
@@ -16,14 +16,12 @@
#include "SysUtil.h"
-#include <errno.h>
#include <fcntl.h>
-#include <stdint.h>
+#include <stdint.h> // SIZE_MAX
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <algorithm>
#include <string>
#include <vector>
@@ -32,9 +30,7 @@
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
-static bool sysMapFD(int fd, MemMapping* pMap) {
- CHECK(pMap != nullptr);
-
+bool MemMapping::MapFD(int fd) {
struct stat sb;
if (fstat(fd, &sb) == -1) {
PLOG(ERROR) << "fstat(" << fd << ") failed";
@@ -47,50 +43,49 @@ static bool sysMapFD(int fd, MemMapping* pMap) {
return false;
}
- pMap->addr = static_cast<unsigned char*>(memPtr);
- pMap->length = sb.st_size;
- pMap->ranges.push_back({ memPtr, static_cast<size_t>(sb.st_size) });
+ addr = static_cast<unsigned char*>(memPtr);
+ length = sb.st_size;
+ ranges_.clear();
+ ranges_.emplace_back(MappedRange{ memPtr, static_cast<size_t>(sb.st_size) });
return true;
}
// A "block map" which looks like this (from uncrypt/uncrypt.cpp):
//
-// /dev/block/platform/msm_sdcc.1/by-name/userdata # block device
-// 49652 4096 # file size in bytes, block size
-// 3 # count of block ranges
-// 1000 1008 # block range 0
-// 2100 2102 # ... block range 1
-// 30 33 # ... block range 2
+// /dev/block/platform/msm_sdcc.1/by-name/userdata # block device
+// 49652 4096 # file size in bytes, block size
+// 3 # count of block ranges
+// 1000 1008 # block range 0
+// 2100 2102 # ... block range 1
+// 30 33 # ... block range 2
//
-// Each block range represents a half-open interval; the line "30 33"
-// reprents the blocks [30, 31, 32].
-static int sysMapBlockFile(const char* filename, MemMapping* pMap) {
- CHECK(pMap != nullptr);
-
+// Each block range represents a half-open interval; the line "30 33" reprents the blocks
+// [30, 31, 32].
+bool MemMapping::MapBlockFile(const std::string& filename) {
std::string content;
if (!android::base::ReadFileToString(filename, &content)) {
PLOG(ERROR) << "Failed to read " << filename;
- return -1;
+ return false;
}
std::vector<std::string> lines = android::base::Split(android::base::Trim(content), "\n");
if (lines.size() < 4) {
LOG(ERROR) << "Block map file is too short: " << lines.size();
- return -1;
+ return false;
}
size_t size;
- unsigned int blksize;
- if (sscanf(lines[1].c_str(), "%zu %u", &size, &blksize) != 2) {
+ size_t blksize;
+ if (sscanf(lines[1].c_str(), "%zu %zu", &size, &blksize) != 2) {
LOG(ERROR) << "Failed to parse file size and block size: " << lines[1];
- return -1;
+ return false;
}
size_t range_count;
if (sscanf(lines[2].c_str(), "%zu", &range_count) != 1) {
LOG(ERROR) << "Failed to parse block map header: " << lines[2];
- return -1;
+ return false;
}
size_t blocks;
@@ -101,14 +96,14 @@ static int sysMapBlockFile(const char* filename, MemMapping* pMap) {
lines.size() != 3 + range_count) {
LOG(ERROR) << "Invalid data in block map file: size " << size << ", blksize " << blksize
<< ", range_count " << range_count << ", lines " << lines.size();
- return -1;
+ return false;
}
// Reserve enough contiguous address space for the whole file.
void* reserve = mmap64(nullptr, blocks * blksize, PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0);
if (reserve == MAP_FAILED) {
PLOG(ERROR) << "failed to reserve address space";
- return -1;
+ return false;
}
const std::string& block_dev = lines[0];
@@ -116,10 +111,10 @@ static int sysMapBlockFile(const char* filename, MemMapping* pMap) {
if (fd == -1) {
PLOG(ERROR) << "failed to open block device " << block_dev;
munmap(reserve, blocks * blksize);
- return -1;
+ return false;
}
- pMap->ranges.resize(range_count);
+ ranges_.clear();
unsigned char* next = static_cast<unsigned char*>(reserve);
size_t remaining_size = blocks * blksize;
@@ -129,84 +124,79 @@ static int sysMapBlockFile(const char* filename, MemMapping* pMap) {
size_t start, end;
if (sscanf(line.c_str(), "%zu %zu\n", &start, &end) != 2) {
- LOG(ERROR) << "failed to parse range " << i << " in block map: " << line;
+ LOG(ERROR) << "failed to parse range " << i << ": " << line;
success = false;
break;
}
- size_t length = (end - start) * blksize;
- if (end <= start || (end - start) > SIZE_MAX / blksize || length > remaining_size) {
- LOG(ERROR) << "unexpected range in block map: " << start << " " << end;
+ size_t range_size = (end - start) * blksize;
+ if (end <= start || (end - start) > SIZE_MAX / blksize || range_size > remaining_size) {
+ LOG(ERROR) << "Invalid range: " << start << " " << end;
success = false;
break;
}
- void* addr = mmap64(next, length, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd,
- static_cast<off64_t>(start) * blksize);
- if (addr == MAP_FAILED) {
- PLOG(ERROR) << "failed to map block " << i;
+ void* range_start = mmap64(next, range_size, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd,
+ static_cast<off64_t>(start) * blksize);
+ if (range_start == MAP_FAILED) {
+ PLOG(ERROR) << "failed to map range " << i << ": " << line;
success = false;
break;
}
- pMap->ranges[i].addr = addr;
- pMap->ranges[i].length = length;
+ ranges_.emplace_back(MappedRange{ range_start, range_size });
- next += length;
- remaining_size -= length;
+ next += range_size;
+ remaining_size -= range_size;
}
if (success && remaining_size != 0) {
- LOG(ERROR) << "ranges in block map are invalid: remaining_size = " << remaining_size;
+ LOG(ERROR) << "Invalid ranges: remaining_size " << remaining_size;
success = false;
}
if (!success) {
munmap(reserve, blocks * blksize);
- return -1;
+ return false;
}
- pMap->addr = static_cast<unsigned char*>(reserve);
- pMap->length = size;
+ addr = static_cast<unsigned char*>(reserve);
+ length = size;
LOG(INFO) << "mmapped " << range_count << " ranges";
- return 0;
+ return true;
}
-int sysMapFile(const char* fn, MemMapping* pMap) {
- if (fn == nullptr || pMap == nullptr) {
- LOG(ERROR) << "Invalid argument(s)";
- return -1;
+bool MemMapping::MapFile(const std::string& fn) {
+ if (fn.empty()) {
+ LOG(ERROR) << "Empty filename";
+ return false;
}
- *pMap = {};
-
if (fn[0] == '@') {
- if (sysMapBlockFile(fn + 1, pMap) != 0) {
+ // Block map file "@/cache/recovery/block.map".
+ if (!MapBlockFile(fn.substr(1))) {
LOG(ERROR) << "Map of '" << fn << "' failed";
- return -1;
+ return false;
}
} else {
// This is a regular file.
- android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(fn, O_RDONLY)));
+ android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(fn.c_str(), O_RDONLY)));
if (fd == -1) {
PLOG(ERROR) << "Unable to open '" << fn << "'";
- return -1;
+ return false;
}
- if (!sysMapFD(fd, pMap)) {
+ if (!MapFD(fd)) {
LOG(ERROR) << "Map of '" << fn << "' failed";
- return -1;
+ return false;
}
}
- return 0;
+ return true;
}
-/*
- * Release a memory mapping.
- */
-void sysReleaseMap(MemMapping* pMap) {
- std::for_each(pMap->ranges.cbegin(), pMap->ranges.cend(), [](const MappedRange& range) {
+MemMapping::~MemMapping() {
+ for (const auto& range : ranges_) {
if (munmap(range.addr, range.length) == -1) {
- PLOG(ERROR) << "munmap(" << range.addr << ", " << range.length << ") failed";
+ PLOG(ERROR) << "Failed to munmap(" << range.addr << ", " << range.length << ")";
}
- });
- pMap->ranges.clear();
+ };
+ ranges_.clear();
}
diff --git a/otautil/SysUtil.h b/otautil/SysUtil.h
index 6a79bf31f..52f6d20a7 100644
--- a/otautil/SysUtil.h
+++ b/otautil/SysUtil.h
@@ -19,37 +19,35 @@
#include <sys/types.h>
+#include <string>
#include <vector>
-struct MappedRange {
- void* addr;
- size_t length;
-};
-
/*
* Use this to keep track of mapped segments.
*/
-struct MemMapping {
- unsigned char* addr; /* start of data */
- size_t length; /* length of data */
-
- std::vector<MappedRange> ranges;
+class MemMapping {
+ public:
+ ~MemMapping();
+ // Map a file into a private, read-only memory segment. If 'filename' begins with an '@'
+ // character, it is a map of blocks to be mapped, otherwise it is treated as an ordinary file.
+ bool MapFile(const std::string& filename);
+ size_t ranges() const {
+ return ranges_.size();
+ };
+
+ unsigned char* addr; // start of data
+ size_t length; // length of data
+
+ private:
+ struct MappedRange {
+ void* addr;
+ size_t length;
+ };
+
+ bool MapBlockFile(const std::string& filename);
+ bool MapFD(int fd);
+
+ std::vector<MappedRange> ranges_;
};
-/*
- * Map a file into a private, read-only memory segment. If 'fn'
- * begins with an '@' character, it is a map of blocks to be mapped,
- * otherwise it is treated as an ordinary file.
- *
- * On success, "pMap" is filled in, and zero is returned.
- */
-int sysMapFile(const char* fn, MemMapping* pMap);
-
-/*
- * Release the pages associated with a shared memory segment.
- *
- * This does not free "pMap"; it just releases the memory.
- */
-void sysReleaseMap(MemMapping* pMap);
-
#endif // _OTAUTIL_SYSUTIL
diff --git a/tests/component/updater_test.cpp b/tests/component/updater_test.cpp
index dc4b5d724..35e87fd56 100644
--- a/tests/component/updater_test.cpp
+++ b/tests/component/updater_test.cpp
@@ -570,7 +570,7 @@ TEST_F(UpdaterTest, block_image_update) {
ASSERT_EQ(0, fclose(zip_file_ptr));
MemMapping map;
- ASSERT_EQ(0, sysMapFile(zip_file.path, &map));
+ ASSERT_TRUE(map.MapFile(zip_file.path));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFromMemory(map.addr, map.length, zip_file.path, &handle));
@@ -646,7 +646,7 @@ TEST_F(UpdaterTest, new_data_short_write) {
ASSERT_EQ(0, fclose(zip_file_ptr));
MemMapping map;
- ASSERT_EQ(0, sysMapFile(zip_file.path, &map));
+ ASSERT_TRUE(map.MapFile(zip_file.path));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFromMemory(map.addr, map.length, zip_file.path, &handle));
diff --git a/tests/component/verifier_test.cpp b/tests/component/verifier_test.cpp
index 4a3a981f7..2ef3828ad 100644
--- a/tests/component/verifier_test.cpp
+++ b/tests/component/verifier_test.cpp
@@ -40,7 +40,7 @@ class VerifierTest : public testing::TestWithParam<std::vector<std::string>> {
void SetUp() override {
std::vector<std::string> args = GetParam();
std::string package = from_testdata_base(args[0]);
- if (sysMapFile(package.c_str(), &memmap) != 0) {
+ if (!memmap.MapFile(package)) {
FAIL() << "Failed to mmap " << package << ": " << strerror(errno) << "\n";
}
diff --git a/tests/unit/sysutil_test.cpp b/tests/unit/sysutil_test.cpp
index f4699664b..434ee25bf 100644
--- a/tests/unit/sysutil_test.cpp
+++ b/tests/unit/sysutil_test.cpp
@@ -27,27 +27,23 @@ TEST(SysUtilTest, InvalidArgs) {
MemMapping mapping;
// Invalid argument.
- ASSERT_EQ(-1, sysMapFile(nullptr, &mapping));
- ASSERT_EQ(-1, sysMapFile("/somefile", nullptr));
+ ASSERT_FALSE(mapping.MapFile(""));
}
-TEST(SysUtilTest, sysMapFileRegularFile) {
+TEST(SysUtilTest, MapFileRegularFile) {
TemporaryFile temp_file1;
std::string content = "abc";
ASSERT_TRUE(android::base::WriteStringToFile(content, temp_file1.path));
- // sysMapFile() should map the file to one range.
+ // MemMapping::MapFile() should map the file to one range.
MemMapping mapping;
- ASSERT_EQ(0, sysMapFile(temp_file1.path, &mapping));
+ ASSERT_TRUE(mapping.MapFile(temp_file1.path));
ASSERT_NE(nullptr, mapping.addr);
ASSERT_EQ(content.size(), mapping.length);
- ASSERT_EQ(1U, mapping.ranges.size());
-
- sysReleaseMap(&mapping);
- ASSERT_EQ(0U, mapping.ranges.size());
+ ASSERT_EQ(1U, mapping.ranges());
}
-TEST(SysUtilTest, sysMapFileBlockMap) {
+TEST(SysUtilTest, MapFileBlockMap) {
// Create a file that has 10 blocks.
TemporaryFile package;
std::string content;
@@ -63,78 +59,72 @@ TEST(SysUtilTest, sysMapFileBlockMap) {
std::string block_map_content = std::string(package.path) + "\n40960 4096\n1\n0 10\n";
ASSERT_TRUE(android::base::WriteStringToFile(block_map_content, block_map_file.path));
- ASSERT_EQ(0, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_TRUE(mapping.MapFile(filename));
ASSERT_EQ(file_size, mapping.length);
- ASSERT_EQ(1U, mapping.ranges.size());
+ ASSERT_EQ(1U, mapping.ranges());
// It's okay to not have the trailing '\n'.
block_map_content = std::string(package.path) + "\n40960 4096\n1\n0 10";
ASSERT_TRUE(android::base::WriteStringToFile(block_map_content, block_map_file.path));
- ASSERT_EQ(0, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_TRUE(mapping.MapFile(filename));
ASSERT_EQ(file_size, mapping.length);
- ASSERT_EQ(1U, mapping.ranges.size());
+ ASSERT_EQ(1U, mapping.ranges());
// Or having multiple trailing '\n's.
block_map_content = std::string(package.path) + "\n40960 4096\n1\n0 10\n\n\n";
ASSERT_TRUE(android::base::WriteStringToFile(block_map_content, block_map_file.path));
- ASSERT_EQ(0, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_TRUE(mapping.MapFile(filename));
ASSERT_EQ(file_size, mapping.length);
- ASSERT_EQ(1U, mapping.ranges.size());
+ ASSERT_EQ(1U, mapping.ranges());
// Multiple ranges.
block_map_content = std::string(package.path) + "\n40960 4096\n3\n0 3\n3 5\n5 10\n";
ASSERT_TRUE(android::base::WriteStringToFile(block_map_content, block_map_file.path));
- ASSERT_EQ(0, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_TRUE(mapping.MapFile(filename));
ASSERT_EQ(file_size, mapping.length);
- ASSERT_EQ(3U, mapping.ranges.size());
-
- sysReleaseMap(&mapping);
- ASSERT_EQ(0U, mapping.ranges.size());
+ ASSERT_EQ(3U, mapping.ranges());
}
-TEST(SysUtilTest, sysMapFileBlockMapInvalidBlockMap) {
+TEST(SysUtilTest, MapFileBlockMapInvalidBlockMap) {
MemMapping mapping;
TemporaryFile temp_file;
std::string filename = std::string("@") + temp_file.path;
// Block map file is too short.
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 4096\n0\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
// Block map file has unexpected number of lines.
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 4096\n1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 4096\n2\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
// Invalid size/blksize/range_count.
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\nabc 4096\n1\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 4096\n\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
// size/blksize/range_count don't match.
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n0 4096\n1\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 0\n1\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
ASSERT_TRUE(android::base::WriteStringToFile("/somefile\n4096 4096\n0\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
+ ASSERT_FALSE(mapping.MapFile(filename));
// Invalid block dev path.
ASSERT_TRUE(android::base::WriteStringToFile("/doesntexist\n4096 4096\n1\n0 1\n", temp_file.path));
- ASSERT_EQ(-1, sysMapFile(filename.c_str(), &mapping));
-
- sysReleaseMap(&mapping);
- ASSERT_EQ(0U, mapping.ranges.size());
+ ASSERT_FALSE(mapping.MapFile(filename));
}
diff --git a/tests/unit/zip_test.cpp b/tests/unit/zip_test.cpp
index 4a1a49b97..df4e38cae 100644
--- a/tests/unit/zip_test.cpp
+++ b/tests/unit/zip_test.cpp
@@ -66,9 +66,9 @@ TEST(ZipTest, ExtractPackageRecursive) {
}
TEST(ZipTest, OpenFromMemory) {
- MemMapping map;
std::string zip_path = from_testdata_base("ziptest_dummy-update.zip");
- ASSERT_EQ(0, sysMapFile(zip_path.c_str(), &map));
+ MemMapping map;
+ ASSERT_TRUE(map.MapFile(zip_path));
// Map an update package into memory and open the archive from there.
ZipArchiveHandle handle;
@@ -85,6 +85,5 @@ TEST(ZipTest, OpenFromMemory) {
ASSERT_EQ(0, ExtractEntryToFile(handle, &binary_entry, tmp_binary.fd));
CloseArchive(handle);
- sysReleaseMap(&map);
}
diff --git a/updater/updater.cpp b/updater/updater.cpp
index c09e267a5..749c86a1f 100644
--- a/updater/updater.cpp
+++ b/updater/updater.cpp
@@ -89,7 +89,7 @@ int main(int argc, char** argv) {
const char* package_filename = argv[3];
MemMapping map;
- if (sysMapFile(package_filename, &map) != 0) {
+ if (!map.MapFile(package_filename)) {
LOG(ERROR) << "failed to map package " << argv[3];
return 3;
}
@@ -213,7 +213,6 @@ int main(int argc, char** argv) {
if (updater_info.package_zip) {
CloseArchive(updater_info.package_zip);
}
- sysReleaseMap(&map);
return 0;
}