applypatch: fix memory leaks reported by static analysis.
Bug: 26906416
Change-Id: I163df5a8f3abda3ba5d4ed81dfc8567054eceb27
diff --git a/applypatch/Android.mk b/applypatch/Android.mk
index 2215194..23d0f7b 100644
--- a/applypatch/Android.mk
+++ b/applypatch/Android.mk
@@ -55,7 +55,7 @@
LOCAL_SRC_FILES := main.cpp
LOCAL_MODULE := applypatch
LOCAL_C_INCLUDES += bootable/recovery
-LOCAL_STATIC_LIBRARIES += libapplypatch libbase libmtdutils libcrypto_static libbz
+LOCAL_STATIC_LIBRARIES += libapplypatch libbase libmtdutils libcrypto_static libbz libedify
LOCAL_SHARED_LIBRARIES += libz libcutils libc
include $(BUILD_EXECUTABLE)
diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp
index 75ffe0f..75d7737 100644
--- a/applypatch/applypatch.cpp
+++ b/applypatch/applypatch.cpp
@@ -25,6 +25,9 @@
#include <sys/types.h>
#include <unistd.h>
+#include <memory>
+#include <string>
+
#include <android-base/strings.h>
#include "openssl/sha.h"
@@ -67,25 +70,29 @@
}
file->size = file->st.st_size;
- file->data = reinterpret_cast<unsigned char*>(malloc(file->size));
+ file->data = nullptr;
+
+ std::unique_ptr<unsigned char, decltype(&free)> data(
+ static_cast<unsigned char*>(malloc(file->size)), free);
+ if (data == nullptr) {
+ printf("failed to allocate memory: %s\n", strerror(errno));
+ return -1;
+ }
FILE* f = fopen(filename, "rb");
if (f == NULL) {
printf("failed to open \"%s\": %s\n", filename, strerror(errno));
- free(file->data);
- file->data = NULL;
return -1;
}
- size_t bytes_read = fread(file->data, 1, file->size, f);
+ size_t bytes_read = fread(data.get(), 1, file->size, f);
if (bytes_read != static_cast<size_t>(file->size)) {
printf("short read of \"%s\" (%zu bytes of %zd)\n", filename, bytes_read, file->size);
- free(file->data);
- file->data = NULL;
+ fclose(f);
return -1;
}
fclose(f);
-
+ file->data = data.release();
SHA1(file->data, file->size, file->sha1);
return 0;
}
@@ -185,7 +192,7 @@
uint8_t parsed_sha[SHA_DIGEST_LENGTH];
// Allocate enough memory to hold the largest size.
- file->data = reinterpret_cast<unsigned char*>(malloc(size[index[pairs-1]]));
+ file->data = static_cast<unsigned char*>(malloc(size[index[pairs-1]]));
char* p = (char*)file->data;
file->size = 0; // # bytes read so far
bool found = false;
@@ -313,7 +320,7 @@
// "MTD:<partition>[:...]" or "EMMC:<partition_device>[:...]". The target name
// might contain multiple colons, but WriteToPartition() only uses the first
// two and ignores the rest. Return 0 on success.
-int WriteToPartition(unsigned char* data, size_t len, const char* target) {
+int WriteToPartition(const unsigned char* data, size_t len, const char* target) {
std::string copy(target);
std::vector<std::string> pieces = android::base::Split(copy, ":");
@@ -352,7 +359,7 @@
return -1;
}
- size_t written = mtd_write_data(ctx, reinterpret_cast<char*>(data), len);
+ size_t written = mtd_write_data(ctx, reinterpret_cast<const char*>(data), len);
if (written != len) {
printf("only wrote %zu of %zu bytes to MTD %s\n", written, len, partition);
mtd_write_close(ctx);
@@ -578,7 +585,7 @@
}
ssize_t FileSink(const unsigned char* data, ssize_t len, void* token) {
- int fd = *reinterpret_cast<int *>(token);
+ int fd = *static_cast<int*>(token);
ssize_t done = 0;
ssize_t wrote;
while (done < len) {
@@ -592,19 +599,9 @@
return done;
}
-typedef struct {
- unsigned char* buffer;
- ssize_t size;
- ssize_t pos;
-} MemorySinkInfo;
-
ssize_t MemorySink(const unsigned char* data, ssize_t len, void* token) {
- MemorySinkInfo* msi = reinterpret_cast<MemorySinkInfo*>(token);
- if (msi->size - msi->pos < len) {
- return -1;
- }
- memcpy(msi->buffer + msi->pos, data, len);
- msi->pos += len;
+ std::string* s = static_cast<std::string*>(token);
+ s->append(reinterpret_cast<const char*>(data), len);
return len;
}
@@ -815,31 +812,52 @@
const Value* bonus_data) {
int retry = 1;
SHA_CTX ctx;
- int output;
- MemorySinkInfo msi;
+ std::string memory_sink_str;
FileContents* source_to_use;
- char* outname;
int made_copy = 0;
+ bool target_is_partition = (strncmp(target_filename, "MTD:", 4) == 0 ||
+ strncmp(target_filename, "EMMC:", 5) == 0);
+ const std::string tmp_target_filename = std::string(target_filename) + ".patch";
+
// assume that target_filename (eg "/system/app/Foo.apk") is located
// on the same filesystem as its top-level directory ("/system").
// We need something that exists for calling statfs().
- char target_fs[strlen(target_filename)+1];
- char* slash = strchr(target_filename+1, '/');
- if (slash != NULL) {
- int count = slash - target_filename;
- strncpy(target_fs, target_filename, count);
- target_fs[count] = '\0';
+ std::string target_fs = target_filename;
+ auto slash_pos = target_fs.find('/', 1);
+ if (slash_pos != std::string::npos) {
+ target_fs.resize(slash_pos);
+ }
+
+ const Value* patch;
+ if (source_patch_value != NULL) {
+ source_to_use = source_file;
+ patch = source_patch_value;
} else {
- strcpy(target_fs, target_filename);
+ source_to_use = copy_file;
+ patch = copy_patch_value;
+ }
+ if (patch->type != VAL_BLOB) {
+ printf("patch is not a blob\n");
+ return 1;
+ }
+ char* header = patch->data;
+ ssize_t header_bytes_read = patch->size;
+ bool use_bsdiff = false;
+ if (header_bytes_read >= 8 && memcmp(header, "BSDIFF40", 8) == 0) {
+ use_bsdiff = true;
+ } else if (header_bytes_read >= 8 && memcmp(header, "IMGDIFF2", 8) == 0) {
+ use_bsdiff = false;
+ } else {
+ printf("Unknown patch file format\n");
+ return 1;
}
do {
// Is there enough room in the target filesystem to hold the patched
// file?
- if (strncmp(target_filename, "MTD:", 4) == 0 ||
- strncmp(target_filename, "EMMC:", 5) == 0) {
+ if (target_is_partition) {
// If the target is a partition, we're actually going to
// write the output to /tmp and then copy it to the
// partition. statfs() always returns 0 blocks free for
@@ -861,7 +879,7 @@
} else {
int enough_space = 0;
if (retry > 0) {
- size_t free_space = FreeSpaceForFile(target_fs);
+ size_t free_space = FreeSpaceForFile(target_fs.c_str());
enough_space =
(free_space > (256 << 10)) && // 256k (two-block) minimum
(free_space > (target_size * 3 / 2)); // 50% margin of error
@@ -901,84 +919,53 @@
made_copy = 1;
unlink(source_filename);
- size_t free_space = FreeSpaceForFile(target_fs);
+ size_t free_space = FreeSpaceForFile(target_fs.c_str());
printf("(now %zu bytes free for target) ", free_space);
}
}
- const Value* patch;
- if (source_patch_value != NULL) {
- source_to_use = source_file;
- patch = source_patch_value;
- } else {
- source_to_use = copy_file;
- patch = copy_patch_value;
- }
-
- if (patch->type != VAL_BLOB) {
- printf("patch is not a blob\n");
- return 1;
- }
SinkFn sink = NULL;
void* token = NULL;
- output = -1;
- outname = NULL;
- if (strncmp(target_filename, "MTD:", 4) == 0 ||
- strncmp(target_filename, "EMMC:", 5) == 0) {
+ int output_fd = -1;
+ if (target_is_partition) {
// We store the decoded output in memory.
- msi.buffer = reinterpret_cast<unsigned char*>(malloc(target_size));
- if (msi.buffer == NULL) {
- printf("failed to alloc %zu bytes for output\n", target_size);
- return 1;
- }
- msi.pos = 0;
- msi.size = target_size;
sink = MemorySink;
- token = &msi;
+ token = &memory_sink_str;
} else {
// We write the decoded output to "<tgt-file>.patch".
- outname = reinterpret_cast<char*>(malloc(strlen(target_filename) + 10));
- strcpy(outname, target_filename);
- strcat(outname, ".patch");
-
- output = open(outname, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, S_IRUSR | S_IWUSR);
- if (output < 0) {
- printf("failed to open output file %s: %s\n",
- outname, strerror(errno));
+ output_fd = open(tmp_target_filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_SYNC,
+ S_IRUSR | S_IWUSR);
+ if (output_fd < 0) {
+ printf("failed to open output file %s: %s\n", tmp_target_filename.c_str(),
+ strerror(errno));
return 1;
}
sink = FileSink;
- token = &output;
+ token = &output_fd;
}
- char* header = patch->data;
- ssize_t header_bytes_read = patch->size;
SHA1_Init(&ctx);
int result;
-
- if (header_bytes_read >= 8 &&
- memcmp(header, "BSDIFF40", 8) == 0) {
+ if (use_bsdiff) {
result = ApplyBSDiffPatch(source_to_use->data, source_to_use->size,
patch, 0, sink, token, &ctx);
- } else if (header_bytes_read >= 8 &&
- memcmp(header, "IMGDIFF2", 8) == 0) {
+ } else {
result = ApplyImagePatch(source_to_use->data, source_to_use->size,
patch, sink, token, &ctx, bonus_data);
- } else {
- printf("Unknown patch file format\n");
- return 1;
}
- if (output >= 0) {
- if (fsync(output) != 0) {
- printf("failed to fsync file \"%s\" (%s)\n", outname, strerror(errno));
+ if (!target_is_partition) {
+ if (fsync(output_fd) != 0) {
+ printf("failed to fsync file \"%s\" (%s)\n", tmp_target_filename.c_str(),
+ strerror(errno));
result = 1;
}
- if (close(output) != 0) {
- printf("failed to close file \"%s\" (%s)\n", outname, strerror(errno));
+ if (close(output_fd) != 0) {
+ printf("failed to close file \"%s\" (%s)\n", tmp_target_filename.c_str(),
+ strerror(errno));
result = 1;
}
}
@@ -990,8 +977,8 @@
} else {
printf("applying patch failed; retrying\n");
}
- if (outname != NULL) {
- unlink(outname);
+ if (!target_is_partition) {
+ unlink(tmp_target_filename.c_str());
}
} else {
// succeeded; no need to retry
@@ -1008,27 +995,27 @@
printf("now %s\n", short_sha1(target_sha1).c_str());
}
- if (output < 0) {
+ if (target_is_partition) {
// Copy the temp file to the partition.
- if (WriteToPartition(msi.buffer, msi.pos, target_filename) != 0) {
+ if (WriteToPartition(reinterpret_cast<const unsigned char*>(memory_sink_str.c_str()),
+ memory_sink_str.size(), target_filename) != 0) {
printf("write of patched data to %s failed\n", target_filename);
return 1;
}
- free(msi.buffer);
} else {
// Give the .patch file the same owner, group, and mode of the
// original source file.
- if (chmod(outname, source_to_use->st.st_mode) != 0) {
- printf("chmod of \"%s\" failed: %s\n", outname, strerror(errno));
+ if (chmod(tmp_target_filename.c_str(), source_to_use->st.st_mode) != 0) {
+ printf("chmod of \"%s\" failed: %s\n", tmp_target_filename.c_str(), strerror(errno));
return 1;
}
- if (chown(outname, source_to_use->st.st_uid, source_to_use->st.st_gid) != 0) {
- printf("chown of \"%s\" failed: %s\n", outname, strerror(errno));
+ if (chown(tmp_target_filename.c_str(), source_to_use->st.st_uid, source_to_use->st.st_gid) != 0) {
+ printf("chown of \"%s\" failed: %s\n", tmp_target_filename.c_str(), strerror(errno));
return 1;
}
// Finally, rename the .patch file to replace the target file.
- if (rename(outname, target_filename) != 0) {
+ if (rename(tmp_target_filename.c_str(), target_filename) != 0) {
printf("rename of .patch to \"%s\" failed: %s\n", target_filename, strerror(errno));
return 1;
}
diff --git a/applypatch/applypatch.h b/applypatch/applypatch.h
index e0df104..14fb490 100644
--- a/applypatch/applypatch.h
+++ b/applypatch/applypatch.h
@@ -18,6 +18,9 @@
#define _APPLYPATCH_H
#include <sys/stat.h>
+
+#include <vector>
+
#include "openssl/sha.h"
#include "edify/expr.h"
@@ -68,22 +71,22 @@
int FindMatchingPatch(uint8_t* sha1, char* const * const patch_sha1_str,
int num_patches);
-// bsdiff.c
+// bsdiff.cpp
void ShowBSDiffLicense();
int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size,
const Value* patch, ssize_t patch_offset,
SinkFn sink, void* token, SHA_CTX* ctx);
int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
const Value* patch, ssize_t patch_offset,
- unsigned char** new_data, ssize_t* new_size);
+ std::vector<unsigned char>* new_data);
-// imgpatch.c
+// imgpatch.cpp
int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
const Value* patch,
SinkFn sink, void* token, SHA_CTX* ctx,
const Value* bonus_data);
-// freecache.c
+// freecache.cpp
int MakeFreeSpaceOnCache(size_t bytes_needed);
#endif
diff --git a/applypatch/bspatch.cpp b/applypatch/bspatch.cpp
index 2517117..ebb55f1 100644
--- a/applypatch/bspatch.cpp
+++ b/applypatch/bspatch.cpp
@@ -24,7 +24,6 @@
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
-#include <malloc.h>
#include <unistd.h>
#include <string.h>
@@ -103,26 +102,22 @@
const Value* patch, ssize_t patch_offset,
SinkFn sink, void* token, SHA_CTX* ctx) {
- unsigned char* new_data;
- ssize_t new_size;
- if (ApplyBSDiffPatchMem(old_data, old_size, patch, patch_offset,
- &new_data, &new_size) != 0) {
+ std::vector<unsigned char> new_data;
+ if (ApplyBSDiffPatchMem(old_data, old_size, patch, patch_offset, &new_data) != 0) {
return -1;
}
- if (sink(new_data, new_size, token) < new_size) {
+ if (sink(new_data.data(), new_data.size(), token) < static_cast<ssize_t>(new_data.size())) {
printf("short write of output: %d (%s)\n", errno, strerror(errno));
return 1;
}
- if (ctx) SHA1_Update(ctx, new_data, new_size);
- free(new_data);
-
+ if (ctx) SHA1_Update(ctx, new_data.data(), new_data.size());
return 0;
}
int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
const Value* patch, ssize_t patch_offset,
- unsigned char** new_data, ssize_t* new_size) {
+ std::vector<unsigned char>* new_data) {
// Patch data format:
// 0 8 "BSDIFF40"
// 8 8 X
@@ -141,12 +136,12 @@
return 1;
}
- ssize_t ctrl_len, data_len;
+ ssize_t ctrl_len, data_len, new_size;
ctrl_len = offtin(header+8);
data_len = offtin(header+16);
- *new_size = offtin(header+24);
+ new_size = offtin(header+24);
- if (ctrl_len < 0 || data_len < 0 || *new_size < 0) {
+ if (ctrl_len < 0 || data_len < 0 || new_size < 0) {
printf("corrupt patch file header (data lengths)\n");
return 1;
}
@@ -183,18 +178,14 @@
printf("failed to bzinit extra stream (%d)\n", bzerr);
}
- *new_data = reinterpret_cast<unsigned char*>(malloc(*new_size));
- if (*new_data == NULL) {
- printf("failed to allocate %zd bytes of memory for output file\n", *new_size);
- return 1;
- }
+ new_data->resize(new_size);
off_t oldpos = 0, newpos = 0;
off_t ctrl[3];
off_t len_read;
int i;
unsigned char buf[24];
- while (newpos < *new_size) {
+ while (newpos < new_size) {
// Read control data
if (FillBuffer(buf, 24, &cstream) != 0) {
printf("error while reading control stream\n");
@@ -210,13 +201,13 @@
}
// Sanity check
- if (newpos + ctrl[0] > *new_size) {
+ if (newpos + ctrl[0] > new_size) {
printf("corrupt patch (new file overrun)\n");
return 1;
}
// Read diff string
- if (FillBuffer(*new_data + newpos, ctrl[0], &dstream) != 0) {
+ if (FillBuffer(new_data->data() + newpos, ctrl[0], &dstream) != 0) {
printf("error while reading diff stream\n");
return 1;
}
@@ -233,13 +224,13 @@
oldpos += ctrl[0];
// Sanity check
- if (newpos + ctrl[1] > *new_size) {
+ if (newpos + ctrl[1] > new_size) {
printf("corrupt patch (new file overrun)\n");
return 1;
}
// Read extra string
- if (FillBuffer(*new_data + newpos, ctrl[1], &estream) != 0) {
+ if (FillBuffer(new_data->data() + newpos, ctrl[1], &estream) != 0) {
printf("error while reading extra stream\n");
return 1;
}
diff --git a/applypatch/freecache.cpp b/applypatch/freecache.cpp
index 2eb2f55..c84f427 100644
--- a/applypatch/freecache.cpp
+++ b/applypatch/freecache.cpp
@@ -25,119 +25,90 @@
#include <dirent.h>
#include <ctype.h>
+#include <memory>
+#include <set>
+#include <string>
+
+#include <android-base/parseint.h>
+#include <android-base/stringprintf.h>
+
#include "applypatch.h"
-static int EliminateOpenFiles(char** files, int file_count) {
- DIR* d;
- struct dirent* de;
- d = opendir("/proc");
- if (d == NULL) {
+static int EliminateOpenFiles(std::set<std::string>* files) {
+ std::unique_ptr<DIR, decltype(&closedir)> d(opendir("/proc"), closedir);
+ if (!d) {
printf("error opening /proc: %s\n", strerror(errno));
return -1;
}
- while ((de = readdir(d)) != 0) {
- int i;
- for (i = 0; de->d_name[i] != '\0' && isdigit(de->d_name[i]); ++i);
- if (de->d_name[i]) continue;
+ struct dirent* de;
+ while ((de = readdir(d.get())) != 0) {
+ unsigned int pid;
+ if (!android::base::ParseUint(de->d_name, &pid)) {
+ continue;
+ }
+ std::string path = android::base::StringPrintf("/proc/%s/fd/", de->d_name);
- // de->d_name[i] is numeric
-
- char path[FILENAME_MAX];
- strcpy(path, "/proc/");
- strcat(path, de->d_name);
- strcat(path, "/fd/");
-
- DIR* fdd;
struct dirent* fdde;
- fdd = opendir(path);
- if (fdd == NULL) {
- printf("error opening %s: %s\n", path, strerror(errno));
+ std::unique_ptr<DIR, decltype(&closedir)> fdd(opendir(path.c_str()), closedir);
+ if (!fdd) {
+ printf("error opening %s: %s\n", path.c_str(), strerror(errno));
continue;
}
- while ((fdde = readdir(fdd)) != 0) {
- char fd_path[FILENAME_MAX];
+ while ((fdde = readdir(fdd.get())) != 0) {
+ std::string fd_path = path + fdde->d_name;
char link[FILENAME_MAX];
- strcpy(fd_path, path);
- strcat(fd_path, fdde->d_name);
- int count;
- count = readlink(fd_path, link, sizeof(link)-1);
+ int count = readlink(fd_path.c_str(), link, sizeof(link)-1);
if (count >= 0) {
link[count] = '\0';
-
- // This is inefficient, but it should only matter if there are
- // lots of files in /cache, and lots of them are open (neither
- // of which should be true, especially in recovery).
if (strncmp(link, "/cache/", 7) == 0) {
- int j;
- for (j = 0; j < file_count; ++j) {
- if (files[j] && strcmp(files[j], link) == 0) {
- printf("%s is open by %s\n", link, de->d_name);
- free(files[j]);
- files[j] = NULL;
- }
+ if (files->erase(link) > 0) {
+ printf("%s is open by %s\n", link, de->d_name);
}
}
}
}
- closedir(fdd);
}
- closedir(d);
-
return 0;
}
-int FindExpendableFiles(char*** names, int* entries) {
- DIR* d;
- struct dirent* de;
- int size = 32;
- *entries = 0;
- *names = reinterpret_cast<char**>(malloc(size * sizeof(char*)));
-
- char path[FILENAME_MAX];
-
+static std::set<std::string> FindExpendableFiles() {
+ std::set<std::string> files;
// We're allowed to delete unopened regular files in any of these
// directories.
const char* dirs[2] = {"/cache", "/cache/recovery/otatest"};
for (size_t i = 0; i < sizeof(dirs)/sizeof(dirs[0]); ++i) {
- d = opendir(dirs[i]);
- if (d == NULL) {
+ std::unique_ptr<DIR, decltype(&closedir)> d(opendir(dirs[i]), closedir);
+ if (!d) {
printf("error opening %s: %s\n", dirs[i], strerror(errno));
continue;
}
// Look for regular files in the directory (not in any subdirectories).
- while ((de = readdir(d)) != 0) {
- strcpy(path, dirs[i]);
- strcat(path, "/");
- strcat(path, de->d_name);
+ struct dirent* de;
+ while ((de = readdir(d.get())) != 0) {
+ std::string path = std::string(dirs[i]) + "/" + de->d_name;
// We can't delete CACHE_TEMP_SOURCE; if it's there we might have
// restarted during installation and could be depending on it to
// be there.
- if (strcmp(path, CACHE_TEMP_SOURCE) == 0) continue;
+ if (path == CACHE_TEMP_SOURCE) {
+ continue;
+ }
struct stat st;
- if (stat(path, &st) == 0 && S_ISREG(st.st_mode)) {
- if (*entries >= size) {
- size *= 2;
- *names = reinterpret_cast<char**>(realloc(*names, size * sizeof(char*)));
- }
- (*names)[(*entries)++] = strdup(path);
+ if (stat(path.c_str(), &st) == 0 && S_ISREG(st.st_mode)) {
+ files.insert(path);
}
}
-
- closedir(d);
}
- printf("%d regular files in deletable directories\n", *entries);
-
- if (EliminateOpenFiles(*names, *entries) < 0) {
- return -1;
+ printf("%zu regular files in deletable directories\n", files.size());
+ if (EliminateOpenFiles(&files) < 0) {
+ return std::set<std::string>();
}
-
- return 0;
+ return files;
}
int MakeFreeSpaceOnCache(size_t bytes_needed) {
@@ -147,15 +118,8 @@
if (free_now >= bytes_needed) {
return 0;
}
-
- char** names;
- int entries;
-
- if (FindExpendableFiles(&names, &entries) < 0) {
- return -1;
- }
-
- if (entries == 0) {
+ std::set<std::string> files = FindExpendableFiles();
+ if (files.empty()) {
// nothing we can delete to free up space!
printf("no files can be deleted to free space on /cache\n");
return -1;
@@ -167,20 +131,13 @@
//
// Instead, we'll be dumb.
- int i;
- for (i = 0; i < entries && free_now < bytes_needed; ++i) {
- if (names[i]) {
- unlink(names[i]);
- free_now = FreeSpaceForFile("/cache");
- printf("deleted %s; now %zu bytes free\n", names[i], free_now);
- free(names[i]);
+ for (const auto& file : files) {
+ unlink(file.c_str());
+ free_now = FreeSpaceForFile("/cache");
+ printf("deleted %s; now %zu bytes free\n", file.c_str(), free_now);
+ if (free_now < bytes_needed) {
+ break;
}
}
-
- for (; i < entries; ++i) {
- free(names[i]);
- }
- free(names);
-
return (free_now >= bytes_needed) ? 0 : -1;
}
diff --git a/applypatch/imgpatch.cpp b/applypatch/imgpatch.cpp
index c9944df..8824038 100644
--- a/applypatch/imgpatch.cpp
+++ b/applypatch/imgpatch.cpp
@@ -21,10 +21,11 @@
#include <sys/cdefs.h>
#include <sys/stat.h>
#include <errno.h>
-#include <malloc.h>
#include <unistd.h>
#include <string.h>
+#include <vector>
+
#include "zlib.h"
#include "openssl/sha.h"
#include "applypatch.h"
@@ -129,7 +130,6 @@
size_t src_len = Read8(deflate_header+8);
size_t patch_offset = Read8(deflate_header+16);
size_t expanded_len = Read8(deflate_header+24);
- size_t target_len = Read8(deflate_header+32);
int level = Read4(deflate_header+40);
int method = Read4(deflate_header+44);
int windowBits = Read4(deflate_header+48);
@@ -150,13 +150,7 @@
// must be appended from the bonus_data value.
size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->size : 0;
- unsigned char* expanded_source = reinterpret_cast<unsigned char*>(malloc(expanded_len));
- if (expanded_source == NULL) {
- printf("failed to allocate %zu bytes for expanded_source\n",
- expanded_len);
- return -1;
- }
-
+ std::vector<unsigned char> expanded_source(expanded_len);
z_stream strm;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
@@ -164,7 +158,7 @@
strm.avail_in = src_len;
strm.next_in = (unsigned char*)(old_data + src_start);
strm.avail_out = expanded_len;
- strm.next_out = expanded_source;
+ strm.next_out = expanded_source.data();
int ret;
ret = inflateInit2(&strm, -15);
@@ -189,18 +183,16 @@
inflateEnd(&strm);
if (bonus_size) {
- memcpy(expanded_source + (expanded_len - bonus_size),
+ memcpy(expanded_source.data() + (expanded_len - bonus_size),
bonus_data->data, bonus_size);
}
// Next, apply the bsdiff patch (in memory) to the uncompressed
// data.
- unsigned char* uncompressed_target_data;
- ssize_t uncompressed_target_size;
- if (ApplyBSDiffPatchMem(expanded_source, expanded_len,
+ std::vector<unsigned char> uncompressed_target_data;
+ if (ApplyBSDiffPatchMem(expanded_source.data(), expanded_len,
patch, patch_offset,
- &uncompressed_target_data,
- &uncompressed_target_size) != 0) {
+ &uncompressed_target_data) != 0) {
return -1;
}
@@ -208,40 +200,36 @@
// we're done with the expanded_source data buffer, so we'll
// reuse that memory to receive the output of deflate.
- unsigned char* temp_data = expanded_source;
- ssize_t temp_size = expanded_len;
- if (temp_size < 32768) {
- // ... unless the buffer is too small, in which case we'll
- // allocate a fresh one.
- free(temp_data);
- temp_data = reinterpret_cast<unsigned char*>(malloc(32768));
- temp_size = 32768;
+ if (expanded_source.size() < 32768U) {
+ expanded_source.resize(32768U);
}
+ std::vector<unsigned char>& temp_data = expanded_source;
// now the deflate stream
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
- strm.avail_in = uncompressed_target_size;
- strm.next_in = uncompressed_target_data;
+ strm.avail_in = uncompressed_target_data.size();
+ strm.next_in = uncompressed_target_data.data();
ret = deflateInit2(&strm, level, method, windowBits, memLevel, strategy);
+ if (ret != Z_OK) {
+ printf("failed to init uncompressed data deflation: %d\n", ret);
+ return -1;
+ }
do {
- strm.avail_out = temp_size;
- strm.next_out = temp_data;
+ strm.avail_out = temp_data.size();
+ strm.next_out = temp_data.data();
ret = deflate(&strm, Z_FINISH);
- ssize_t have = temp_size - strm.avail_out;
+ ssize_t have = temp_data.size() - strm.avail_out;
- if (sink(temp_data, have, token) != have) {
+ if (sink(temp_data.data(), have, token) != have) {
printf("failed to write %ld compressed bytes to output\n",
(long)have);
return -1;
}
- if (ctx) SHA1_Update(ctx, temp_data, have);
+ if (ctx) SHA1_Update(ctx, temp_data.data(), have);
} while (ret != Z_STREAM_END);
deflateEnd(&strm);
-
- free(temp_data);
- free(uncompressed_target_data);
} else {
printf("patch chunk %d is unknown type %d\n", i, type);
return -1;
diff --git a/applypatch/main.cpp b/applypatch/main.cpp
index 445a7fe..7606d5d 100644
--- a/applypatch/main.cpp
+++ b/applypatch/main.cpp
@@ -19,6 +19,9 @@
#include <string.h>
#include <unistd.h>
+#include <memory>
+#include <vector>
+
#include "applypatch.h"
#include "edify/expr.h"
#include "openssl/sha.h"
@@ -47,16 +50,11 @@
// "<sha1>:<filename>" into the new parallel arrays *sha1s and
// *patches (loading file contents into the patches). Returns true on
// success.
-static bool ParsePatchArgs(int argc, char** argv, char*** sha1s,
- Value*** patches, int* num_patches) {
- *num_patches = argc;
- *sha1s = reinterpret_cast<char**>(malloc(*num_patches * sizeof(char*)));
- *patches = reinterpret_cast<Value**>(malloc(*num_patches * sizeof(Value*)));
- memset(*patches, 0, *num_patches * sizeof(Value*));
-
+static bool ParsePatchArgs(int argc, char** argv, std::vector<char*>* sha1s,
+ std::vector<std::unique_ptr<Value, decltype(&FreeValue)>>* patches) {
uint8_t digest[SHA_DIGEST_LENGTH];
- for (int i = 0; i < *num_patches; ++i) {
+ for (int i = 0; i < argc; ++i) {
char* colon = strchr(argv[i], ':');
if (colon != NULL) {
*colon = '\0';
@@ -68,34 +66,22 @@
return false;
}
- (*sha1s)[i] = argv[i];
+ sha1s->push_back(argv[i]);
if (colon == NULL) {
- (*patches)[i] = NULL;
+ patches->emplace_back(nullptr, FreeValue);
} else {
FileContents fc;
if (LoadFileContents(colon, &fc) != 0) {
- goto abort;
+ return false;
}
- (*patches)[i] = reinterpret_cast<Value*>(malloc(sizeof(Value)));
- (*patches)[i]->type = VAL_BLOB;
- (*patches)[i]->size = fc.size;
- (*patches)[i]->data = reinterpret_cast<char*>(fc.data);
+ std::unique_ptr<Value, decltype(&FreeValue)> value(new Value, FreeValue);
+ value->type = VAL_BLOB;
+ value->size = fc.size;
+ value->data = reinterpret_cast<char*>(fc.data);
+ patches->push_back(std::move(value));
}
}
-
return true;
-
- abort:
- for (int i = 0; i < *num_patches; ++i) {
- Value* p = (*patches)[i];
- if (p != NULL) {
- free(p->data);
- free(p);
- }
- }
- free(*sha1s);
- free(*patches);
- return false;
}
static int FlashMode(const char* src_filename, const char* tgt_filename,
@@ -104,17 +90,17 @@
}
static int PatchMode(int argc, char** argv) {
- Value* bonus = NULL;
+ std::unique_ptr<Value, decltype(&FreeValue)> bonus(nullptr, FreeValue);
if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
FileContents fc;
if (LoadFileContents(argv[2], &fc) != 0) {
printf("failed to load bonus file %s\n", argv[2]);
return 1;
}
- bonus = reinterpret_cast<Value*>(malloc(sizeof(Value)));
+ bonus.reset(new Value);
bonus->type = VAL_BLOB;
bonus->size = fc.size;
- bonus->data = (char*)fc.data;
+ bonus->data = reinterpret_cast<char*>(fc.data);
argc -= 2;
argv += 2;
}
@@ -140,33 +126,20 @@
}
- char** sha1s;
- Value** patches;
- int num_patches;
- if (!ParsePatchArgs(argc-5, argv+5, &sha1s, &patches, &num_patches)) {
+ std::vector<char*> sha1s;
+ std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patches;
+ if (!ParsePatchArgs(argc-5, argv+5, &sha1s, &patches)) {
printf("failed to parse patch args\n");
return 1;
}
- int result = applypatch(argv[1], argv[2], argv[3], target_size,
- num_patches, sha1s, patches, bonus);
-
- int i;
- for (i = 0; i < num_patches; ++i) {
- Value* p = patches[i];
- if (p != NULL) {
- free(p->data);
- free(p);
- }
+ std::vector<Value*> patch_ptrs;
+ for (const auto& p : patches) {
+ patch_ptrs.push_back(p.get());
}
- if (bonus) {
- free(bonus->data);
- free(bonus);
- }
- free(sha1s);
- free(patches);
-
- return result;
+ return applypatch(argv[1], argv[2], argv[3], target_size,
+ patch_ptrs.size(), sha1s.data(),
+ patch_ptrs.data(), bonus.get());
}
// This program applies binary patches to files in a way that is safe
