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Fail cleanly on allocation failures

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Previously code in the SWIG tool didn't handle allocation failures
well.  Most places didn't check for NULL return from
malloc()/realloc()/calloc() at all, typically resulting in undefined
behaviour, and some places used assert() to check for a NULL return
(which is a misuse of assert() and such checks disappear if built with
NDEBUG defined leaving us back with undefined behaviour).

All C allocations are now done via wrapper functions (Malloc(),
Realloc() and Calloc()) which emit and error and exit with non-zero
status on failure, so a non-NULL return can be relied upon.

Fixes #1901.
This commit is contained in:
Olly Betts 2022-03-03 17:45:03 +13:00 • committed by Olly Betts
commit e38847f7e1
14 changed files with 83 additions and 65 deletions
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8
Source/DOH/file.c
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@ -291,10 +291,6 @@ DOH *DohNewFile(DOHString *filename, const char *mode, DOHList *newfiles) {
return 0;
f = (DohFile *) DohMalloc(sizeof(DohFile));
if (!f) {
fclose(file);
return 0;
}
if (newfiles)
Append(newfiles, filename);
f->filep = file;
@ -314,8 +310,6 @@ DOH *DohNewFile(DOHString *filename, const char *mode, DOHList *newfiles) {
DOH *DohNewFileFromFile(FILE *file) {
DohFile *f;
f = (DohFile *) DohMalloc(sizeof(DohFile));
if (!f)
return 0;
f->filep = file;
f->fd = 0;
f->closeondel = 0;
@ -331,8 +325,6 @@ DOH *DohNewFileFromFile(FILE *file) {
DOH *DohNewFileFromFd(int fd) {
DohFile *f;
f = (DohFile *) DohMalloc(sizeof(DohFile));
if (!f)
return 0;
f->filep = 0;
f->fd = fd;
f->closeondel = 0;