Memory leak in PPC target

[relapids]

Steps to reproduce: Build with LeakSanitizer (enabled by default with AddressSanitizer on Linux) and run the tests/samples.

Example build steps:

$ cmake -S ../repo/ -B . -G Ninja -D CMAKE_C_COMPILER=clang -D CMAKE_C_FLAGS=-fsanitize=address -D CMAKE_BUILD_TYPE=Debug
$ cmake --build .

Test output for test_ppc32_add:

Test test_ppc32_add...                          [ OK ]

=================================================================
==7079==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 3072 byte(s) in 1 object(s) allocated from:
    #0 0x557cedfbc3e1 in __interceptor_calloc (/home/builder/unicorn/build/test_ppc+0xdb3e1)
    #1 0x7f1c603e0ec4 in g_malloc0 /home/builder/unicorn/repo/glib_compat/gmem.c:139:15
    #2 0x7f1c603e0f74 in g_malloc0_n /home/builder/unicorn/repo/glib_compat/gmem.c:168:12
    #3 0x7f1c627465bc in init_ppc_proc /home/builder/unicorn/repo/qemu/target/ppc/translate_init.inc.c:9258:29
    #4 0x7f1c62720887 in ppc_cpu_realize /home/builder/unicorn/repo/qemu/target/ppc/translate_init.inc.c:9922:5
    #5 0x7f1c6271fc02 in cpu_ppc_init_ppc /home/builder/unicorn/repo/qemu/target/ppc/translate_init.inc.c:11191:5
    #6 0x7f1c62522278 in ppc_cpus_init /home/builder/unicorn/repo/qemu/target/ppc/unicorn.c:403:11
    #7 0x7f1c603d3b73 in machine_initialize /home/builder/unicorn/repo/qemu/softmmu/vl.c:56:12
    #8 0x7f1c603c48c0 in uc_init /home/builder/unicorn/repo/uc.c:228:9
    #9 0x7f1c603c8c4e in uc_mem_map /home/builder/unicorn/repo/uc.c:1042:5
    #10 0x557cee00750c in uc_common_setup /home/builder/unicorn/repo/tests/unit/test_ppc.c:10:5
    #11 0x557cee0049e7 in test_ppc32_add /home/builder/unicorn/repo/tests/unit/test_ppc.c:20:5
    #12 0x557cee006f16 in acutest_do_run_ /home/builder/unicorn/repo/tests/unit/acutest.h:1026:9
    #13 0x557cee004253 in acutest_run_ /home/builder/unicorn/repo/tests/unit/acutest.h:1124:23
    #14 0x557cee00184e in main /home/builder/unicorn/repo/tests/unit/acutest.h:1831:13
    #15 0x7f1c5f9552cf  (/usr/lib/libc.so.6+0x232cf) (BuildId: e637217a46491314667a7a37b2155cb07afc1a40)

SUMMARY: AddressSanitizer: 3072 byte(s) leaked in 1 allocation(s).

It looks like the following allocation(s) in qemu\target\ppc\translate_init.inc.c is not handled in qemu\target\ppc\unicorn.c (ppc_release):

    /* Allocate TLBs buffer when needed */
    if (env->nb_tlb != 0) {
        int nb_tlb = env->nb_tlb;
        if (env->id_tlbs != 0) {
            nb_tlb *= 2;
        }
        switch (env->tlb_type) {
        case TLB_6XX:
            env->tlb.tlb6 = g_new0(ppc6xx_tlb_t, nb_tlb);
            break;
        case TLB_EMB:
            env->tlb.tlbe = g_new0(ppcemb_tlb_t, nb_tlb);
            break;
        case TLB_MAS:
            env->tlb.tlbm = g_new0(ppcmas_tlb_t, nb_tlb);
            break;
        }
        /* Pre-compute some useful values */
        env->tlb_per_way = env->nb_tlb / env->nb_ways;
    }