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out-of-memory handling in LL(k), LR, and GLR backends

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This commit is contained in:
Sven M. Hallberg 2015-11-30 18:07:33 +01:00
parent 5996477a5e
commit d5f3e13309
3 changed files with 31 additions and 0 deletions
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10
src/backends/glr.c
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@ -198,6 +198,16 @@ HParseResult *h_glr_parse(HAllocator* mm__, const HParser* parser, HInputStream*
HArena *arena = h_new_arena(mm__, 0); // will hold the results
HArena *tarena = h_new_arena(mm__, 0); // tmp, deleted after parse
// out-of-memory handling
jmp_buf except;
h_arena_set_except(arena, &except);
h_arena_set_except(tarena, &except);
if(setjmp(except)) {
h_delete_arena(arena);
h_delete_arena(tarena);
return NULL;
}
// allocate engine lists (will hold one engine per state)
// these are swapped each iteration
HSlist *engines = h_slist_new(tarena);

11
src/backends/llk.c
View file

@ -561,6 +561,17 @@ HParseResult *h_llk_parse(HAllocator* mm__, const HParser* parser, HInputStream*
{
HLLkState *s = llk_parse_start_(mm__, parser);
// out-of-memory handling
jmp_buf except;
h_arena_set_except(s->arena, &except);
h_arena_set_except(s->tarena, &except);
if(setjmp(except)) {
h_delete_arena(s->arena);
h_delete_arena(s->tarena);
h_free(s);
return NULL;
}
assert(stream->last_chunk);
s->seq = llk_parse_chunk_(s, parser, stream);

10
src/backends/lr.c
View file

@ -388,6 +388,16 @@ HParseResult *h_lr_parse(HAllocator* mm__, const HParser* parser, HInputStream*
HArena *tarena = h_new_arena(mm__, 0); // tmp, deleted after parse
HLREngine *engine = h_lrengine_new(arena, tarena, table, stream);
// out-of-memory handling
jmp_buf except;
h_arena_set_except(arena, &except);
h_arena_set_except(tarena, &except);
if(setjmp(except)) {
h_delete_arena(arena);
h_delete_arena(tarena);
return NULL;
}
// iterate engine to completion
while(h_lrengine_step(engine, h_lrengine_action(engine)));