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better error handling which always reports the right file name

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This commit is contained in:
krangelov
2021-09-07 15:54:27 +02:00
parent 8936e6211e
commit a843ddba55
11 changed files with 95 additions and 49 deletions
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29
src/runtime/c/pgf/data.h
View File

@@ -30,6 +30,35 @@ private:
const char *msg;
};
class PGF_INTERNAL_DECL pgf_systemerror : public std::runtime_error {
public:
pgf_systemerror(int code) : std::runtime_error("pgf_systemerror")
{
this->m_code = code;
this->m_filepath = NULL;
}
pgf_systemerror(int code, const char *filepath) : std::runtime_error("pgf_systemerror")
{
this->m_code = code;
this->m_filepath = filepath;
}
virtual int code() const
{
return m_code;
}
const char *filepath() const
{
return m_filepath;
}
private:
int m_code;
const char *m_filepath;
};
struct PGF_INTERNAL_DECL PgfFlag {
PgfLiteral value;
PgfText name;

32
src/runtime/c/pgf/db.cxx
View File

@@ -2,7 +2,6 @@
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <system_error>
#include "data.h"
@@ -270,30 +269,33 @@ struct malloc_state
};
PGF_INTERNAL
PgfDB::PgfDB(const char* pathname, int flags, int mode) {
PgfDB::PgfDB(const char* filepath, int flags, int mode) {
size_t file_size;
bool is_new = false;
fd = -1;
ms = NULL;
if (pathname == NULL) {
if (filepath == NULL) {
this->filepath = NULL;
file_size = getpagesize();
is_new = true;
} else {
fd = open(pathname, flags, mode);
fd = open(filepath, flags, mode);
if (fd < 0)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
this->filepath = strdup(filepath);
file_size = lseek(fd, 0, SEEK_END);
if (file_size == ((off_t) -1))
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
is_new = false;
if (file_size == 0) {
file_size = getpagesize();
if (ftruncate(fd, file_size) < 0)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
is_new = true;
}
}
@@ -302,7 +304,7 @@ PgfDB::PgfDB(const char* pathname, int flags, int mode) {
ms = (malloc_state*)
mmap(NULL, file_size, PROT_READ | PROT_WRITE, mflags, fd, 0);
if (ms == MAP_FAILED)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
if (is_new) {
init_state(file_size);
@@ -310,7 +312,7 @@ PgfDB::PgfDB(const char* pathname, int flags, int mode) {
int res = pthread_rwlock_init(&rwlock, NULL);
if (res != 0) {
throw std::system_error(res, std::generic_category());
throw pgf_systemerror(errno);
}
}
@@ -327,6 +329,8 @@ PgfDB::~PgfDB() {
close(fd);
pthread_rwlock_destroy(&rwlock);
::free((void*) filepath);
}
PGF_INTERNAL
@@ -338,7 +342,7 @@ void PgfDB::sync()
int res = msync((void *) ms, size, MS_SYNC | MS_INVALIDATE);
if (res != 0)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno);
}
PGF_INTERNAL
@@ -837,13 +841,13 @@ object PgfDB::malloc_internal(size_t bytes)
if (fd >= 0) {
if (ftruncate(fd, new_size) < 0)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
}
malloc_state* new_ms =
(malloc_state*) mremap(ms, old_size, new_size, MREMAP_MAYMOVE);
if (new_ms == MAP_FAILED)
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno);
ms = new_ms;
current_base = (unsigned char*) ms;
@@ -961,7 +965,7 @@ DB_scope::DB_scope(PgfDB *db, DB_scope_mode tp)
(tp == READER_SCOPE) ? pthread_rwlock_rdlock(&db->rwlock)
: pthread_rwlock_wrlock(&db->rwlock);
if (res != 0)
throw std::system_error(res, std::generic_category());
throw pgf_systemerror(res);
save_db = current_db;
current_db = db;
@@ -978,7 +982,7 @@ DB_scope::~DB_scope()
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wterminate"
if (res != 0)
throw std::system_error(res, std::generic_category());
throw pgf_systemerror(res);
#pragma GCC diagnostic pop
current_db = save_db;

3
src/runtime/c/pgf/db.h
View File

@@ -57,6 +57,7 @@ public:
class PgfDB {
private:
int fd;
const char *filepath;
malloc_state* ms;
pthread_rwlock_t rwlock;
@@ -64,7 +65,7 @@ private:
friend class PgfReader;
public:
PGF_INTERNAL_DECL PgfDB(const char* pathname, int flags, int mode);
PGF_INTERNAL_DECL PgfDB(const char* filepath, int flags, int mode);
PGF_INTERNAL_DECL ~PgfDB();
template<class A>

35
src/runtime/c/pgf/pgf.cxx
View File

@@ -23,16 +23,15 @@ PgfDB *pgf_read_pgf(const char* fpath,
try {
db = new PgfDB(NULL, 0, 0);
std::ifstream in(fpath, std::ios::binary);
if (in.fail()) {
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, fpath);
}
{
DB_scope scope(db, WRITER_SCOPE);
PgfReader rdr(&in);
PgfReader rdr(&in, fpath);
ref<PgfPGF> pgf = rdr.read_pgf();
PgfDB::set_root(pgf);
@@ -40,14 +39,16 @@ PgfDB *pgf_read_pgf(const char* fpath,
}
return db;
} catch (std::system_error& e) {
} catch (pgf_systemerror& e) {
err->type = PGF_EXN_SYSTEM_ERROR;
err->code = e.code().value();
err->code = e.code();
err->msg = e.filepath();
} catch (pgf_error& e) {
err->type = PGF_EXN_PGF_ERROR;
err->msg = strdup(e.what());
}
end:
if (db != NULL)
delete db;
@@ -68,13 +69,13 @@ PgfDB *pgf_boot_ngf(const char* pgf_path, const char* ngf_path,
std::ifstream in(pgf_path, std::ios::binary);
if (in.fail()) {
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, pgf_path);
}
{
DB_scope scope(db, WRITER_SCOPE);
PgfReader rdr(&in);
PgfReader rdr(&in, pgf_path);
ref<PgfPGF> pgf = rdr.read_pgf();
db->set_root<PgfPGF>(pgf);
@@ -84,9 +85,10 @@ PgfDB *pgf_boot_ngf(const char* pgf_path, const char* ngf_path,
}
return db;
} catch (std::system_error& e) {
} catch (pgf_systemerror& e) {
err->type = PGF_EXN_SYSTEM_ERROR;
err->code = e.code().value();
err->code = e.code();
err->msg = e.filepath();
} catch (pgf_error& e) {
err->type = PGF_EXN_PGF_ERROR;
err->msg = strdup(e.what());
@@ -135,9 +137,10 @@ PgfDB *pgf_read_ngf(const char *fpath,
}
return db;
} catch (std::system_error& e) {
} catch (pgf_systemerror& e) {
err->type = PGF_EXN_SYSTEM_ERROR;
err->code = e.code().value();
err->code = e.code();
err->msg = e.filepath();
} catch (pgf_error& e) {
err->type = PGF_EXN_PGF_ERROR;
err->msg = strdup(e.what());
@@ -431,9 +434,10 @@ PgfRevision pgf_clone_revision(PgfDB *db, PgfRevision revision,
pgf->abstract.cats->ref_count++;
return new_pgf.as_object();
} catch (std::system_error& e) {
} catch (pgf_systemerror& e) {
err->type = PGF_EXN_SYSTEM_ERROR;
err->code = e.code().value();
err->code = e.code();
err->msg = e.filepath();
} catch (pgf_error& e) {
err->type = PGF_EXN_PGF_ERROR;
err->msg = strdup(e.what());
@@ -471,9 +475,10 @@ void pgf_create_function(PgfDB *db, PgfRevision revision,
namespace_insert(pgf->abstract.funs, absfun);
namespace_release(pgf->abstract.funs);
pgf->abstract.funs = nmsp;
} catch (std::system_error& e) {
} catch (pgf_systemerror& e) {
err->type = PGF_EXN_SYSTEM_ERROR;
err->code = e.code().value();
err->code = e.code();
err->msg = e.filepath();
} catch (pgf_error& e) {
err->type = PGF_EXN_PGF_ERROR;
err->msg = strdup(e.what());

1
src/runtime/c/pgf/pgf.h
View File

@@ -55,6 +55,7 @@ typedef struct {
* - If the exception was caused by external factors such as an error
* from a system call, then type will be PGF_EXN_SYSTEM_ERROR and
* the field code will contain the value of errno from the C runtime.
* The field msg will be NULL or it may contain a file name.
*
* - If the exception was caused by factors related to the GF runtime
* itself, then the error type is PGF_EXN_PGF_ERROR, and the field

13
src/runtime/c/pgf/reader.cxx
View File

@@ -3,9 +3,10 @@
#include <math.h>
#include <string.h>
PgfReader::PgfReader(std::istream *in)
PgfReader::PgfReader(std::istream *in, const char *filepath)
{
this->in = in;
this->filepath = filepath;
}
uint8_t PgfReader::read_uint8()
@@ -15,7 +16,7 @@ uint8_t PgfReader::read_uint8()
if (in->eof())
throw pgf_error("reached end of file while reading a grammar");
if (in->fail())
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
return b;
}
@@ -27,7 +28,7 @@ uint16_t PgfReader::read_u16be()
if (in->eof())
throw pgf_error("reached end of file while reading a grammar");
if (in->fail())
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
return (((uint16_t) buf[0]) << 8 | buf[1]);
}
@@ -39,7 +40,7 @@ uint64_t PgfReader::read_u64be()
if (in->eof())
throw pgf_error("reached end of file while reading a grammar");
if (in->fail())
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
return (((uint64_t) buf[0]) << 56 |
((uint64_t) buf[1]) << 48 |
@@ -95,7 +96,7 @@ object PgfReader::read_name_internal(size_t struct_size)
if (in->eof())
throw pgf_error("utf8 decoding error");
if (in->fail())
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
ptext->text[size] = 0;
@@ -131,7 +132,7 @@ object PgfReader::read_text_internal(size_t struct_size)
if (in->eof())
throw pgf_error("utf8 decoding error");
if (in->fail())
throw std::system_error(errno, std::generic_category());
throw pgf_systemerror(errno, filepath);
p += len;
}

3
src/runtime/c/pgf/reader.h
View File

@@ -10,7 +10,7 @@
class PGF_INTERNAL_DECL PgfReader
{
public:
PgfReader(std::istream *in);
PgfReader(std::istream *in, const char *filepath);
uint8_t read_uint8();
uint16_t read_u16be();
@@ -74,6 +74,7 @@ public:
private:
std::istream *in;
const char* filepath;
object read_name_internal(size_t struct_size);
object read_text_internal(size_t struct_size);