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fix a memory leak

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This commit is contained in:
krangelov
2021-09-28 09:53:40 +02:00
parent 5334174923
commit 9863f32d05
1 changed files with 26 additions and 10 deletions
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36
src/runtime/c/pgf/db.cxx
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@@ -300,37 +300,53 @@ PgfDB::PgfDB(const char* filepath, int flags, int mode) {
if (fd < 0)
throw pgf_systemerror(errno, filepath);
this->filepath = strdup(filepath);
file_size = lseek(fd, 0, SEEK_END);
if (file_size == ((off_t) -1))
throw pgf_systemerror(errno, filepath);
if (file_size == ((off_t) -1)) {
int code = errno;
close(fd);
throw pgf_systemerror(code, filepath);
}
is_new = false;
if (file_size == 0) {
file_size = getpagesize();
if (ftruncate(fd, file_size) < 0)
throw pgf_systemerror(errno, filepath);
if (ftruncate(fd, file_size) < 0) {
int code = errno;
close(fd);
throw pgf_systemerror(code, filepath);
}
is_new = true;
}
this->filepath = strdup(filepath);
}
int mflags = (fd < 0) ? (MAP_PRIVATE | MAP_ANONYMOUS) : MAP_SHARED;
ms = (malloc_state*)
mmap(NULL, file_size, PROT_READ | PROT_WRITE, mflags, fd, 0);
if (ms == MAP_FAILED)
throw pgf_systemerror(errno, filepath);
if (ms == MAP_FAILED) {
::free((void *) this->filepath);
int code = errno;
close(fd);
throw pgf_systemerror(code, filepath);
}
int res = pthread_rwlock_init(&rwlock, NULL);
if (res != 0) {
throw pgf_systemerror(errno);
::free((void *) this->filepath);
int code = errno;
close(fd);
throw pgf_systemerror(code);
}
if (is_new) {
init_state(file_size);
} else {
if (strncmp(ms->sign, slovo, sizeof(ms->sign)) != 0)
if (strncmp(ms->sign, slovo, sizeof(ms->sign)) != 0) {
::free((void *) this->filepath);
close(fd);
throw pgf_error("Invalid file content");
}
// We must make sure that left-over transient revisions are
// released. This may happen if a client process was killed