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Add more checks for Fast JIT gen insn and jit_lock_reg_in_insn (#1449)

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Add more checks for Fast JIT generating insn and jit_lock_reg_in_insn
in compile_int_div_no_check and other places to avoid accessing
NULL insn.
This commit is contained in:
Qiang 2022-09-07 16:52:35 +08:00 committed by GitHub
parent 0a08b92662
commit da79e3e9b2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 64 additions and 13 deletions
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77
core/iwasm/fast-jit/fe/jit_emit_numberic.c
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@ -539,8 +539,13 @@ compile_int_div_no_check(JitCompContext *cc, IntArithmetic arith_op,
insn = GEN_INSN(DIV_U, rax_hreg, rax_hreg, right);
}
jit_lock_reg_in_insn(cc, insn, eax_hreg);
jit_lock_reg_in_insn(cc, insn, edx_hreg);
if (!insn) {
goto fail;
}
if (!jit_lock_reg_in_insn(cc, insn, eax_hreg)
|| !jit_lock_reg_in_insn(cc, insn, edx_hreg)) {
goto fail;
}
if (is_i32) {
res = jit_cc_new_reg_I32(cc);
@ -551,9 +556,12 @@ compile_int_div_no_check(JitCompContext *cc, IntArithmetic arith_op,
insn1 = jit_insn_new_MOV(res, rax_hreg);
}
if (insn && insn1) {
jit_insn_insert_after(insn, insn1);
if (!insn1) {
jit_set_last_error(cc, "generate insn failed");
goto fail;
}
jit_insn_insert_after(insn, insn1);
break;
}
case INT_REM_S:
@ -576,8 +584,13 @@ compile_int_div_no_check(JitCompContext *cc, IntArithmetic arith_op,
insn = GEN_INSN(REM_U, rdx_hreg, rax_hreg, right);
}
jit_lock_reg_in_insn(cc, insn, eax_hreg);
jit_lock_reg_in_insn(cc, insn, edx_hreg);
if (!insn) {
goto fail;
}
if (!jit_lock_reg_in_insn(cc, insn, eax_hreg)
|| !jit_lock_reg_in_insn(cc, insn, edx_hreg)) {
goto fail;
}
if (is_i32) {
res = jit_cc_new_reg_I32(cc);
@ -588,9 +601,12 @@ compile_int_div_no_check(JitCompContext *cc, IntArithmetic arith_op,
insn1 = jit_insn_new_MOV(res, rdx_hreg);
}
if (insn && insn1) {
jit_insn_insert_after(insn, insn1);
if (!insn1) {
jit_set_last_error(cc, "generate insn failed");
goto fail;
}
jit_insn_insert_after(insn, insn1);
break;
}
#else
@ -1133,13 +1149,20 @@ compile_int_shl(JitCompContext *cc, JitReg left, JitReg right, bool is_i32)
#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
GEN_INSN(MOV, is_i32 ? ecx_hreg : rcx_hreg, right);
insn = GEN_INSN(SHL, res, left, is_i32 ? ecx_hreg : rcx_hreg);
jit_lock_reg_in_insn(cc, insn, ecx_hreg);
if (jit_get_last_error(cc) || !jit_lock_reg_in_insn(cc, insn, ecx_hreg)) {
goto fail;
}
#else
GEN_INSN(SHL, res, left, right);
if (jit_get_last_error(cc)) {
goto fail;
}
#endif
shortcut:
return res;
fail:
return (JitReg)0;
}
static JitReg
@ -1164,13 +1187,20 @@ compile_int_shrs(JitCompContext *cc, JitReg left, JitReg right, bool is_i32)
#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
GEN_INSN(MOV, is_i32 ? ecx_hreg : rcx_hreg, right);
insn = GEN_INSN(SHRS, res, left, is_i32 ? ecx_hreg : rcx_hreg);
jit_lock_reg_in_insn(cc, insn, ecx_hreg);
if (jit_get_last_error(cc) || !jit_lock_reg_in_insn(cc, insn, ecx_hreg)) {
goto fail;
}
#else
GEN_INSN(SHRS, res, left, right);
if (jit_get_last_error(cc)) {
goto fail;
}
#endif
shortcut:
return res;
fail:
return (JitReg)0;
}
static JitReg
@ -1195,13 +1225,20 @@ compile_int_shru(JitCompContext *cc, JitReg left, JitReg right, bool is_i32)
#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
GEN_INSN(MOV, is_i32 ? ecx_hreg : rcx_hreg, right);
insn = GEN_INSN(SHRU, res, left, is_i32 ? ecx_hreg : rcx_hreg);
jit_lock_reg_in_insn(cc, insn, ecx_hreg);
if (jit_get_last_error(cc) || !jit_lock_reg_in_insn(cc, insn, ecx_hreg)) {
goto fail;
}
#else
GEN_INSN(SHRU, res, left, right);
if (jit_get_last_error(cc)) {
goto fail;
}
#endif
shortcut:
return res;
fail:
return (JitReg)0;
}
DEF_UNI_INT_CONST_OPS(rotl)
@ -1257,13 +1294,20 @@ compile_int_rotl(JitCompContext *cc, JitReg left, JitReg right, bool is_i32)
#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
GEN_INSN(MOV, is_i32 ? ecx_hreg : rcx_hreg, right);
insn = GEN_INSN(ROTL, res, left, is_i32 ? ecx_hreg : rcx_hreg);
jit_lock_reg_in_insn(cc, insn, ecx_hreg);
if (jit_get_last_error(cc) || !jit_lock_reg_in_insn(cc, insn, ecx_hreg)) {
goto fail;
}
#else
GEN_INSN(ROTL, res, left, right);
if (jit_get_last_error(cc)) {
goto fail;
}
#endif
shortcut:
return res;
fail:
return (JitReg)0;
}
DEF_UNI_INT_CONST_OPS(rotr)
@ -1319,13 +1363,20 @@ compile_int_rotr(JitCompContext *cc, JitReg left, JitReg right, bool is_i32)
#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
GEN_INSN(MOV, is_i32 ? ecx_hreg : rcx_hreg, right);
insn = GEN_INSN(ROTR, res, left, is_i32 ? ecx_hreg : rcx_hreg);
jit_lock_reg_in_insn(cc, insn, ecx_hreg);
if (jit_get_last_error(cc) || !jit_lock_reg_in_insn(cc, insn, ecx_hreg)) {
goto fail;
}
#else
GEN_INSN(ROTR, res, left, right);
if (jit_get_last_error(cc)) {
goto fail;
}
#endif
shortcut:
return res;
fail:
return (JitReg)0;
}
static bool