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Add assertion to prevent buffer overflow #376

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Merged
merged 1 commit into from
Mar 10, 2024
Merged

Add assertion to prevent buffer overflow #376

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4 changes: 4 additions & 0 deletions src/jit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,7 @@ static inline void emit_load_imm(struct jit_state *state, int dst, int64_t imm);
static inline void offset_map_insert(struct jit_state *state, int32_t target_pc)
{
struct offset_map *map_entry = &state->offset_map[state->n_insn++];
assert(state->n_insn < MAX_INSNS);
map_entry->pc = target_pc;
map_entry->offset = state->offset;
}
Expand Down Expand Up @@ -352,6 +353,7 @@ static inline void emit_jump_target_address(struct jit_state *state,
int32_t target_pc)
{
struct jump *jump = &state->jumps[state->n_jumps++];
assert(state->n_jumps < MAX_INSNS);
jump->offset_loc = state->offset;
jump->target_pc = target_pc;
emit4(state, 0);
Expand Down Expand Up @@ -553,6 +555,7 @@ static inline void emit_jump_target_offset(struct jit_state *state,
uint32_t jump_state_offset)
{
struct jump *jump = &state->jumps[state->n_jumps++];
assert(state->n_jumps < MAX_INSNS);
jump->offset_loc = jump_loc;
jump->target_offset = jump_state_offset;
}
Expand Down Expand Up @@ -930,6 +933,7 @@ static inline void emit_jmp(struct jit_state *state, uint32_t target_pc)
emit_jump_target_address(state, target_pc);
#elif defined(__aarch64__)
struct jump *jump = &state->jumps[state->n_jumps++];
assert(state->n_jumps < MAX_INSNS);
jump->offset_loc = state->offset;
jump->target_pc = target_pc;
emit_a64(state, UBR_B);
Expand Down