scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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commit bc267b974204cd6ddf6f717a0a2597dc33f68406
parent 9bcd185b56a4b5cd1658bd2456ed0d93ef15db4a
Author: Quentin Rameau <quinq@fifth.space>
Date:   Thu, 27 Oct 2016 14:17:40 +0200

[cc2] fix symbol hashing of TMPSYM

As TMPSYM is a dummy id, we would always use the same hash for temporary
symbols ending up in a segfault or infinite loop.

Thanks to k0ga for finding a better fix than mine.

Diffstat:
Mcc2/symbol.c | 9++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/cc2/symbol.c b/cc2/symbol.c @@ -38,7 +38,8 @@ popctx(void) infunction = 0; for (sym = locals; sym; sym = next) { next = sym->next; - symtab[sym->id & NR_SYMHASH-1] = sym->h_next; + if (sym->id != TMPSYM) + symtab[sym->id & NR_SYMHASH-1] = sym->h_next; freesym(sym); } curlocal = locals = NULL; @@ -70,8 +71,10 @@ getsym(unsigned id) curlocal->next = sym; curlocal = sym; } - sym->h_next = *htab; - *htab = sym; + if (id != TMPSYM) { + sym->h_next = *htab; + *htab = sym; + } } return sym; }