disas/nanomips: Prevent memory leaking

g_autofree attribute is added for every dynamically allocated string to
prevent memory leaking.

The implementation of the several functions that work with dynamically
allocated strings is slightly changed so we can add those attributes.

Signed-off-by: Milica Lazarevic <milica.lazarevic@syrmia.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220912122635.74032-19-milica.lazarevic@syrmia.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

1 files changed, 51 insertions, 45 deletions

diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp
index 3a3a9a9..ce93fda 100644
--- a/disas/nanomips.cpp
+++ b/disas/nanomips.cpp
@@ -1937,7 +1937,7 @@ static char *ADDIUPC_32_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se21_0_20_to_1_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("ADDIUPC %s, %s", rt, s);
 }
@@ -1959,7 +1959,7 @@ static char *ADDIUPC_48_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_15_to_0_31_to_16(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 6, info);
+    g_autofree char *s = ADDRESS(s_value, 6, info);
 
     return img_format("ADDIUPC %s, %s", rt, s);
 }
@@ -2417,7 +2417,7 @@ static char *ALUIPC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_0_11_to_2_20_to_12_s12(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("ALUIPC %s, %%pcrel_hi(%s)", rt, s);
 }
@@ -2574,7 +2574,7 @@ static char *BALC_16_(uint64 instruction, Dis_info *info)
 {
     int64 s_value = extract_s__se10_0_9_8_7_6_5_4_3_2_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 2, info);
+    g_autofree char *s = ADDRESS(s_value, 2, info);
 
     return img_format("BALC %s", s);
 }
@@ -2594,7 +2594,7 @@ static char *BALC_32_(uint64 instruction, Dis_info *info)
 {
     int64 s_value = extract_s__se25_0_24_to_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BALC %s", s);
 }
@@ -2639,7 +2639,7 @@ static char *BBEQZC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BBEQZC %s, 0x%" PRIx64 ", %s", rt, bit_value, s);
 }
@@ -2662,7 +2662,7 @@ static char *BBNEZC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BBNEZC %s, 0x%" PRIx64 ", %s", rt, bit_value, s);
 }
@@ -2682,7 +2682,7 @@ static char *BC_16_(uint64 instruction, Dis_info *info)
 {
     int64 s_value = extract_s__se10_0_9_8_7_6_5_4_3_2_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 2, info);
+    g_autofree char *s = ADDRESS(s_value, 2, info);
 
     return img_format("BC %s", s);
 }
@@ -2702,7 +2702,7 @@ static char *BC_32_(uint64 instruction, Dis_info *info)
 {
     int64 s_value = extract_s__se25_0_24_to_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BC %s", s);
 }
@@ -2724,7 +2724,7 @@ static char *BC1EQZC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se14_0_13_to_1_s1(instruction);
 
     const char *ft = FPR(ft_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BC1EQZC %s, %s", ft, s);
 }
@@ -2746,7 +2746,7 @@ static char *BC1NEZC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se14_0_13_to_1_s1(instruction);
 
     const char *ft = FPR(ft_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BC1NEZC %s, %s", ft, s);
 }
@@ -2767,7 +2767,7 @@ static char *BC2EQZC(uint64 instruction, Dis_info *info)
     uint64 ct_value = extract_ct_25_24_23_22_21(instruction);
     int64 s_value = extract_s__se14_0_13_to_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BC2EQZC CP%" PRIu64 ", %s", ct_value, s);
 }
@@ -2788,7 +2788,7 @@ static char *BC2NEZC(uint64 instruction, Dis_info *info)
     uint64 ct_value = extract_ct_25_24_23_22_21(instruction);
     int64 s_value = extract_s__se14_0_13_to_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BC2NEZC CP%" PRIu64 ", %s", ct_value, s);
 }
@@ -2812,7 +2812,7 @@ static char *BEQC_16_(uint64 instruction, Dis_info *info)
 
     const char *rs3 = GPR(decode_gpr_gpr3(rs3_value));
     const char *rt3 = GPR(decode_gpr_gpr3(rt3_value));
-    char *u = ADDRESS(u_value, 2, info);
+    g_autofree char *u = ADDRESS(u_value, 2, info);
 
     return img_format("BEQC %s, %s, %s", rs3, rt3, u);
 }
@@ -2836,7 +2836,7 @@ static char *BEQC_32_(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BEQC %s, %s, %s", rs, rt, s);
 }
@@ -2859,7 +2859,7 @@ static char *BEQIC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BEQIC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -2881,7 +2881,7 @@ static char *BEQZC_16_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se7_0_6_5_4_3_2_1_s1(instruction);
 
     const char *rt3 = GPR(decode_gpr_gpr3(rt3_value));
-    char *s = ADDRESS(s_value, 2, info);
+    g_autofree char *s = ADDRESS(s_value, 2, info);
 
     return img_format("BEQZC %s, %s", rt3, s);
 }
@@ -2905,7 +2905,7 @@ static char *BGEC(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BGEC %s, %s, %s", rs, rt, s);
 }
@@ -2928,7 +2928,7 @@ static char *BGEIC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BGEIC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -2951,7 +2951,7 @@ static char *BGEIUC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BGEIUC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -2975,7 +2975,7 @@ static char *BGEUC(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BGEUC %s, %s, %s", rs, rt, s);
 }
@@ -2999,7 +2999,7 @@ static char *BLTC(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BLTC %s, %s, %s", rs, rt, s);
 }
@@ -3022,7 +3022,7 @@ static char *BLTIC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BLTIC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -3045,7 +3045,7 @@ static char *BLTIUC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BLTIUC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -3069,7 +3069,7 @@ static char *BLTUC(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BLTUC %s, %s, %s", rs, rt, s);
 }
@@ -3093,7 +3093,7 @@ static char *BNEC_16_(uint64 instruction, Dis_info *info)
 
     const char *rs3 = GPR(decode_gpr_gpr3(rs3_value));
     const char *rt3 = GPR(decode_gpr_gpr3(rt3_value));
-    char *u = ADDRESS(u_value, 2, info);
+    g_autofree char *u = ADDRESS(u_value, 2, info);
 
     return img_format("BNEC %s, %s, %s", rs3, rt3, u);
 }
@@ -3117,7 +3117,7 @@ static char *BNEC_32_(uint64 instruction, Dis_info *info)
 
     const char *rs = GPR(rs_value);
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BNEC %s, %s, %s", rs, rt, s);
 }
@@ -3140,7 +3140,7 @@ static char *BNEIC(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se11_0_10_9_8_7_6_5_4_3_2_1_0_s1(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BNEIC %s, 0x%" PRIx64 ", %s", rt, u_value, s);
 }
@@ -3162,7 +3162,7 @@ static char *BNEZC_16_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se7_0_6_5_4_3_2_1_s1(instruction);
 
     const char *rt3 = GPR(decode_gpr_gpr3(rt3_value));
-    char *s = ADDRESS(s_value, 2, info);
+    g_autofree char *s = ADDRESS(s_value, 2, info);
 
     return img_format("BNEZC %s, %s", rt3, s);
 }
@@ -3182,7 +3182,7 @@ static char *BPOSGE32C(uint64 instruction, Dis_info *info)
 {
     int64 s_value = extract_s__se14_0_13_to_1_s1(instruction);
 
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("BPOSGE32C %s", s);
 }
@@ -8182,7 +8182,7 @@ static char *LDPC_48_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_15_to_0_31_to_16(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 6, info);
+    g_autofree char *s = ADDRESS(s_value, 6, info);
 
     return img_format("LDPC %s, %s", rt, s);
 }
@@ -9146,7 +9146,7 @@ static char *LWPC_48_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_15_to_0_31_to_16(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 6, info);
+    g_autofree char *s = ADDRESS(s_value, 6, info);
 
     return img_format("LWPC %s, %s", rt, s);
 }
@@ -10131,7 +10131,7 @@ static char *MOVE_BALC(uint64 instruction, Dis_info *info)
 
     const char *rd1 = GPR(decode_gpr_gpr1(rd1_value));
     const char *rtz4 = GPR(decode_gpr_gpr4_zero(rtz4_value));
-    char *s = ADDRESS(s_value, 4, info);
+    g_autofree char *s = ADDRESS(s_value, 4, info);
 
     return img_format("MOVE.BALC %s, %s, %s", rd1, rtz4, s);
 }
@@ -12176,8 +12176,9 @@ static char *RESTORE_32_(uint64 instruction, Dis_info *info)
     uint64 u_value = extract_u_11_10_9_8_7_6_5_4_3__s3(instruction);
     uint64 gp_value = extract_gp_2(instruction);
 
-    return img_format("RESTORE 0x%" PRIx64 "%s", u_value,
-               save_restore_list(rt_value, count_value, gp_value));
+    g_autofree char *save_restore_str = save_restore_list(
+        rt_value, count_value, gp_value);
+    return img_format("RESTORE 0x%" PRIx64 "%s", u_value, save_restore_str);
 }
 
 
@@ -12197,8 +12198,9 @@ static char *RESTORE_JRC_16_(uint64 instruction, Dis_info *info)
     uint64 u_value = extract_u_7_6_5_4__s4(instruction);
     uint64 count_value = extract_count_3_2_1_0(instruction);
 
-    return img_format("RESTORE.JRC 0x%" PRIx64 "%s", u_value,
-        save_restore_list(encode_rt1_from_rt(rt1_value), count_value, 0));
+    g_autofree char *save_restore_str = save_restore_list(
+        encode_rt1_from_rt(rt1_value), count_value, 0);
+    return img_format("RESTORE.JRC 0x%" PRIx64 "%s", u_value, save_restore_str);
 }
 
 
@@ -12219,8 +12221,10 @@ static char *RESTORE_JRC_32_(uint64 instruction, Dis_info *info)
     uint64 u_value = extract_u_11_10_9_8_7_6_5_4_3__s3(instruction);
     uint64 gp_value = extract_gp_2(instruction);
 
+    g_autofree char *save_restore_str = save_restore_list(
+        rt_value, count_value, gp_value);
     return img_format("RESTORE.JRC 0x%" PRIx64 "%s", u_value,
-               save_restore_list(rt_value, count_value, gp_value));
+                      save_restore_str);
 }
 
 
@@ -12509,8 +12513,9 @@ static char *SAVE_16_(uint64 instruction, Dis_info *info)
     uint64 u_value = extract_u_7_6_5_4__s4(instruction);
     uint64 count_value = extract_count_3_2_1_0(instruction);
 
-    return img_format("SAVE 0x%" PRIx64 "%s", u_value,
-        save_restore_list(encode_rt1_from_rt(rt1_value), count_value, 0));
+    g_autofree char *save_restore_str = save_restore_list(
+        encode_rt1_from_rt(rt1_value), count_value, 0);
+    return img_format("SAVE 0x%" PRIx64 "%s", u_value, save_restore_str);
 }
 
 
@@ -12531,8 +12536,9 @@ static char *SAVE_32_(uint64 instruction, Dis_info *info)
     uint64 u_value = extract_u_11_10_9_8_7_6_5_4_3__s3(instruction);
     uint64 gp_value = extract_gp_2(instruction);
 
-    return img_format("SAVE 0x%" PRIx64 "%s", u_value,
-               save_restore_list(rt_value, count_value, gp_value));
+    g_autofree char *save_restore_str = save_restore_list(
+        rt_value, count_value, gp_value);
+    return img_format("SAVE 0x%" PRIx64 "%s", u_value, save_restore_str);
 }
 
 
@@ -13117,7 +13123,7 @@ static char *SDPC_48_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_15_to_0_31_to_16(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 6, info);
+    g_autofree char *s = ADDRESS(s_value, 6, info);
 
     return img_format("SDPC %s, %s", rt, s);
 }
@@ -15296,7 +15302,7 @@ static char *SWPC_48_(uint64 instruction, Dis_info *info)
     int64 s_value = extract_s__se31_15_to_0_31_to_16(instruction);
 
     const char *rt = GPR(rt_value);
-    char *s = ADDRESS(s_value, 6, info);
+    g_autofree char *s = ADDRESS(s_value, 6, info);
 
     return img_format("SWPC %s, %s", rt, s);
 }
@@ -21935,7 +21941,7 @@ int print_insn_nanomips(bfd_vma memaddr, struct disassemble_info *info)
     int status;
     bfd_byte buffer[2];
     uint16_t insn1 = 0, insn2 = 0, insn3 = 0;
-    char *buf = NULL;
+    g_autofree char *buf = NULL;
 
     info->bytes_per_chunk = 2;
     info->display_endian = info->endian;