sambuc/retrobsd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

C compiler improvements

Browse Source 
Fix malloc(0) issue (#26) in cpp.
Reduce cpp size and allow for larger inputs.
Clean up unused variables in Smaller C.
This commit is contained in:
Alexey Frunze
2014-05-09 23:53:52 -07:00
parent b238afb5b9
commit 17f417f519
4 changed files with 215 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/cmd/cpp/cpp.c
View File

@@ -1309,6 +1309,7 @@ expdef(const uchar *vp, struct recur *rp, int gotwarn)
uchar *sptr;
int narg, c, i, plev, snuff, instr;
int ellips = 0, shot = gotwarn;
size_t allocsz;
DPRINT(("expdef rp %s\n", (rp ? (const char *)rp->sp->namep : "")));
c = sloscan();
@@ -1321,7 +1322,10 @@ expdef(const uchar *vp, struct recur *rp, int gotwarn)
} else
narg = vp[1];
args = malloc(sizeof(uchar *) * (narg+ellips));
// The code depends on malloc(0) returning a non-NULL pointer, which is not guaranteed.
// Workaround it.
allocsz = sizeof(uchar *) * ((narg+ellips) ? (narg+ellips) : 1);
args = malloc(allocsz);
if (args == NULL)
error("expdef: out of mem");