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added assertion in the JIT compiler which checks that we are not going outside of the compilation window

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kr.angelov
2013-09-25 07:53:10 +00:00
parent b2b5bda43d
commit be8bf64eb2
1 changed files with 6 additions and 1 deletions
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7
src/runtime/c/pgf/jit.c
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@@ -14,6 +14,7 @@ struct PgfJitState {
GuPool* pool; GuPool* pool;
jit_state jit; jit_state jit;
jit_insn *buf; jit_insn *buf;
char *save_ip_ptr;
GuBuf* patches; GuBuf* patches;
}; };
@@ -71,10 +72,10 @@ pgf_jit_init(GuPool* tmp_pool, GuPool* pool)
PgfJitState* state = gu_new(PgfJitState, tmp_pool); PgfJitState* state = gu_new(PgfJitState, tmp_pool);
state->tmp_pool = tmp_pool; state->tmp_pool = tmp_pool;
state->pool = pool; state->pool = pool;
state->buf = NULL;
state->patches = gu_new_buf(PgfCallPatch, tmp_pool); state->patches = gu_new_buf(PgfCallPatch, tmp_pool);
pgf_jit_alloc_page(state); pgf_jit_alloc_page(state);
state->save_ip_ptr = jit_get_ip().ptr;
return state; return state;
} }
@@ -82,11 +83,15 @@ pgf_jit_init(GuPool* tmp_pool, GuPool* pool)
static void static void
pgf_jit_make_space(PgfJitState* state) pgf_jit_make_space(PgfJitState* state)
{ {
assert (state->save_ip_ptr + JIT_CODE_WINDOW > jit_get_ip().ptr);
size_t page_size = getpagesize(); size_t page_size = getpagesize();
if (jit_get_ip().ptr + JIT_CODE_WINDOW > ((char*) state->buf) + page_size) { if (jit_get_ip().ptr + JIT_CODE_WINDOW > ((char*) state->buf) + page_size) {
jit_flush_code(state->buf, jit_get_ip().ptr); jit_flush_code(state->buf, jit_get_ip().ptr);
pgf_jit_alloc_page(state); pgf_jit_alloc_page(state);
} }
state->save_ip_ptr = jit_get_ip().ptr;
} }
void void