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radare2/libr/core/linux_heap_glibc.c
Ernest Deák (Tino) f81c7dee37
Fixed incorrect thread arena output ##debug 
When issuing dmha, often times the output
would include thousands of lines saying the
thread arena is 0xffffffffffffff.
This commit introduces a simple check of
GHT_MAX that aborts printing if the thread
arena is equal to that number. I assume
those pointers are incorrect anyway.
2022-11-20 12:55:12 +01:00

1737 lines
49 KiB
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/* radare2 - LGPL - Copyright 2016-2020 - n4x0r, soez, pancake */
#ifndef INCLUDE_HEAP_GLIBC_C
#define INCLUDE_HEAP_GLIBC_C
#include "r_config.h"
#define HEAP32 1
#include "linux_heap_glibc.c"
#undef HEAP32
#endif
#undef GH
#undef GHT
#undef GHT_MAX
#undef read_le
#if HEAP32
#define GH(x) x##_32
#define GHT ut32
#define GHT_MAX UT32_MAX
#define read_le(x) r_read_le##32(x)
#else
#define GH(x) x##_64
#define GHT ut64
#define GHT_MAX UT64_MAX
#define read_le(x) r_read_le##64(x)
#endif
/**
* \brief Find the address of a given symbol
* \param core RCore Pointer to the r2's core
* \param path Pointer to the binary path in which to look for the symbol
* \param sym_name Pointer to the symbol's name to search for
* \return address
*
* Used to find the address of a given symbol inside a binary
*
* TODO: Stop using deprecated functions like r_bin_cur
*/
static GHT GH(get_va_symbol)(RCore *core, const char *path, const char *sym_name) {
GHT vaddr = GHT_MAX;
RBin *bin = core->bin;
RBinFile *current_bf = r_bin_cur (bin);
RListIter *iter;
RBinSymbol *s;
RBinFileOptions opt;
r_bin_file_options_init (&opt, -1, 0, 0, false);
bool res = r_bin_open (bin, path, &opt);
if (!res) {
return vaddr;
}
RList *syms = r_bin_get_symbols (bin);
r_list_foreach (syms, iter, s) {
if (!strcmp (s->name, sym_name)) {
vaddr = s->vaddr;
break;
}
}
RBinFile *libc_bf = r_bin_cur (bin);
r_bin_file_delete (bin, libc_bf->id);
r_bin_file_set_cur_binfile (bin, current_bf);
return vaddr;
}
static inline GHT GH(align_address_to_size)(ut64 addr, ut64 align) {
return addr + ((align - (addr % align)) % align);
}
static inline GHT GH(get_next_pointer)(RCore *core, GHT pos, GHT next) {
return (core->dbg->glibc_version < 232) ? next : PROTECT_PTR (pos, next);
}
static GHT GH(get_main_arena_with_symbol)(RCore *core, RDebugMap *map) {
r_return_val_if_fail (core && map, GHT_MAX);
GHT base_addr = map->addr;
r_return_val_if_fail (base_addr != GHT_MAX, GHT_MAX);
GHT main_arena = GHT_MAX;
GHT vaddr = GHT_MAX;
char *path = strdup (map->name);
if (path && r_file_exists (path)) {
vaddr = GH (get_va_symbol) (core, path, "main_arena");
if (vaddr != GHT_MAX) {
main_arena = base_addr + vaddr;
} else {
vaddr = GH (get_va_symbol) (core, path, "__malloc_hook");
if (vaddr == GHT_MAX) {
return main_arena;
}
RBinInfo *info = r_bin_get_info (core->bin);
if (!strcmp (info->arch, "x86")) {
main_arena = GH (align_address_to_size) (vaddr + base_addr + sizeof (GHT), 0x20);
} else if (!strcmp (info->arch, "arm")) {
main_arena = vaddr + base_addr - sizeof (GHT) * 2 - sizeof (MallocState);
}
}
}
free (path);
return main_arena;
}
static bool GH(is_tcache)(RCore *core) {
char *fp = NULL;
double v = 0;
if (r_config_get_b (core->config, "cfg.debug")) {
RDebugMap *map;
RListIter *iter;
r_debug_map_sync (core->dbg);
r_list_foreach (core->dbg->maps, iter, map) {
// In case the binary is named *libc-* or *libc.*
if (strncmp (map->name, core->bin->file, strlen(map->name)) != 0) {
fp = strstr (map->name, "libc-");
if (fp) {
break;
}
fp = strstr (map->name, "libc.");
if (fp) {
break;
}
}
}
} else {
bool tcv = r_config_get_b (core->config, "dbg.glibc.tcache");
// eprintf ("dbg.glibc.tcache = %i\n", tcv);
return tcv;
}
if (fp) {
v = r_num_get_float (NULL, fp + 5);
core->dbg->glibc_version = (int) round((v * 100));
}
return (v > 2.25);
}
static GHT GH(tcache_chunk_size)(RCore *core, GHT brk_start) {
GHT sz = 0;
GH (RHeapChunk) *cnk = R_NEW0 (GH (RHeapChunk));
if (!cnk) {
return sz;
}
r_io_read_at (core->io, brk_start, (ut8 *)cnk, sizeof (GH (RHeapChunk)));
sz = (cnk->size >> 3) << 3; //clear chunk flag
return sz;
}
static void GH(update_arena_with_tc)(GH(RHeap_MallocState_tcache) *cmain_arena, MallocState *main_arena) {
int i = 0;
main_arena->mutex = cmain_arena->mutex;
main_arena->flags = cmain_arena->flags;
for (i = 0; i < BINMAPSIZE; i++) {
main_arena->binmap[i] = cmain_arena->binmap[i];
}
main_arena->have_fast_chunks = cmain_arena->have_fast_chunks;
main_arena->attached_threads = cmain_arena->attached_threads;
for (i = 0; i < NFASTBINS; i++) {
main_arena->GH (fastbinsY)[i] = cmain_arena->fastbinsY[i];
}
main_arena->GH (top) = cmain_arena->top;
main_arena->GH (last_remainder) = cmain_arena->last_remainder;
for (i = 0; i < NBINS * 2 - 2; i++) {
main_arena->GH (bins)[i] = cmain_arena->bins[i];
}
main_arena->GH(next) = cmain_arena->next;
main_arena->GH(next_free) = cmain_arena->next_free;
main_arena->GH(system_mem) = cmain_arena->system_mem;
main_arena->GH(max_system_mem) = cmain_arena->max_system_mem;
}
static void GH(update_arena_without_tc)(GH(RHeap_MallocState) *cmain_arena, MallocState *main_arena) {
size_t i = 0;
main_arena->mutex = cmain_arena->mutex;
main_arena->flags = cmain_arena->flags;
for (i = 0; i < BINMAPSIZE; i++) {
main_arena->binmap[i] = cmain_arena->binmap[i];
}
main_arena->attached_threads = 1;
for (i = 0; i < NFASTBINS; i++) {
main_arena->GH(fastbinsY)[i] = cmain_arena->fastbinsY[i];
}
main_arena->GH(top) = cmain_arena->top;
main_arena->GH(last_remainder) = cmain_arena->last_remainder;
for (i = 0; i < NBINS * 2 - 2; i++) {
main_arena->GH(bins)[i] = cmain_arena->bins[i];
}
main_arena->GH(next) = cmain_arena->next;
main_arena->GH(next_free) = cmain_arena->next_free;
main_arena->GH(system_mem) = cmain_arena->system_mem;
main_arena->GH(max_system_mem) = cmain_arena->max_system_mem;
}
static bool GH(update_main_arena)(RCore *core, GHT m_arena, MallocState *main_arena) {
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
if (tcache) {
GH(RHeap_MallocState_tcache) *cmain_arena = R_NEW0 (GH(RHeap_MallocState_tcache));
if (!cmain_arena) {
return false;
}
(void)r_io_read_at (core->io, m_arena, (ut8 *)cmain_arena, sizeof (GH(RHeap_MallocState_tcache)));
GH(update_arena_with_tc)(cmain_arena, main_arena);
} else {
GH(RHeap_MallocState) *cmain_arena = R_NEW0 (GH(RHeap_MallocState));
if (!cmain_arena) {
return false;
}
(void)r_io_read_at (core->io, m_arena, (ut8 *)cmain_arena, sizeof (GH(RHeap_MallocState)));
GH(update_arena_without_tc)(cmain_arena, main_arena);
}
return true;
}
static void GH(get_brks)(RCore *core, GHT *brk_start, GHT *brk_end) {
if (r_config_get_b (core->config, "cfg.debug")) {
RListIter *iter;
RDebugMap *map;
r_debug_map_sync (core->dbg);
r_list_foreach (core->dbg->maps, iter, map) {
if (map->name) {
if (strstr (map->name, "[heap]")) {
*brk_start = map->addr;
*brk_end = map->addr_end;
break;
}
}
}
} else {
RIOBank *bank = r_io_bank_get (core->io, core->io->bank);
if (!bank) {
return;
}
RIOMapRef *mapref;
RListIter *iter;
r_list_foreach (bank->maprefs, iter, mapref) {
RIOMap *map = r_io_map_get (core->io, mapref->id);
if (map->name) {
if (strstr (map->name, "[heap]")) {
*brk_start = r_io_map_begin (map);
*brk_end = r_io_map_end (map);
break;
}
}
}
}
}
static void GH(print_arena_stats)(RCore *core, GHT m_arena, MallocState *main_arena, GHT global_max_fast, int format) {
size_t i, j, k, start;
GHT align = 12 * SZ + sizeof (int) * 2;
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (tcache) {
align = 16;
}
GHT apart[NSMALLBINS + 1] = { 0LL };
if (format == '*') {
for (i = 0; i < NBINS * 2 - 2; i += 2) {
GHT addr = m_arena + align + SZ * i - SZ * 2;
GHT bina = main_arena->GH(bins)[i];
r_cons_printf ("f chunk.%zu.bin = 0x%"PFMT64x"\n", i, (ut64)addr);
r_cons_printf ("f chunk.%zu.fd = 0x%"PFMT64x"\n", i, (ut64)bina);
bina = main_arena->GH(bins)[i + 1];
r_cons_printf ("f chunk.%zu.bk = 0x%"PFMT64x"\n", i, (ut64)bina);
}
for (i = 0; i < BINMAPSIZE; i++) {
r_cons_printf ("f binmap.%zu = 0x%"PFMT64x, i, (ut64)main_arena->binmap[i]);
}
{ /* maybe use SDB instead of flags for this? */
char units[8];
r_num_units (units, sizeof (units), main_arena->GH(max_system_mem));
r_cons_printf ("f heap.maxmem = %s\n", units);
r_num_units (units, sizeof (units), main_arena->GH(system_mem));
r_cons_printf ("f heap.sysmem = %s\n", units);
r_num_units (units, sizeof (units), main_arena->GH(next_free));
r_cons_printf ("f heap.nextfree = %s\n", units);
r_num_units (units, sizeof (units), main_arena->GH(next));
r_cons_printf ("f heap.next= %s\n", units);
}
return;
}
PRINT_GA ("malloc_state @ ");
PRINTF_BA ("0x%"PFMT64x"\n\n", (ut64)m_arena);
PRINT_GA ("struct malloc_state main_arena {\n");
PRINT_GA (" mutex = ");
PRINTF_BA ("0x%08x\n", (ut32)main_arena->mutex);
PRINT_GA (" flags = ");
PRINTF_BA ("0x%08x\n", (ut32)main_arena->flags);
PRINT_GA (" fastbinsY = {\n");
for (i = 0, j = 1, k = SZ * 4; i < NFASTBINS; i++, j++, k += SZ * 2) {
if (FASTBIN_IDX_TO_SIZE (j) <= global_max_fast) {
PRINTF_YA (" Fastbin %02zu\n", j);
} else {
PRINTF_RA (" Fastbin %02zu\n", j);
}
PRINT_GA (" chunksize:");
PRINTF_BA (" == %04zu ", k);
PRINTF_GA ("0x%"PFMT64x, (ut64)main_arena->GH(fastbinsY)[i]);
PRINT_GA (",\n");
}
PRINT_GA ("}\n");
PRINT_GA (" top = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(top));
PRINT_GA (",\n");
PRINT_GA (" last_remainder = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(last_remainder));
PRINT_GA (",\n");
PRINT_GA (" bins {\n");
/* Index & size for largebins */
start = SZ * 128;
for (i = start, k = 0, j = 0; j < NBINS - 2 && i < 1024 * 1024; i += 64) {
j = largebin_index (i);
if (j == k + NSMALLBINS + 1) {
apart[k++] = i;
}
}
for (i = 0, j = 1, k = SZ * 4; i < NBINS * 2 - 2; i += 2, j++) {
PRINTF_YA (" Bin %03zu: ", j);
if (j == 1) {
PRINT_GA ("Unsorted Bin");
PRINT_GA (" [");
PRINT_GA (" chunksize:");
PRINT_BA (" undefined ");
} else if (j > 1 && j <= NSMALLBINS) {
if (j == 2) {
PRINT_GA (" ┌");
} else if (j == (NSMALLBINS / 2)) {
PRINT_GA (" Small Bins │");
} else if (j != 2 && j != (NSMALLBINS / 2) && j != NSMALLBINS) {
PRINT_GA (" │");
} else {
PRINT_GA (" └");
}
PRINT_GA (" chunksize:");
PRINTF_BA (" == %06zu ", k);
if (j < NSMALLBINS) {
k += SZ * 2;
}
} else {
if (j == NSMALLBINS + 1) {
PRINT_GA (" ┌");
} else if (j == (NSMALLBINS / 2) * 3) {
PRINT_GA (" Large Bins │");
} else if (j != NSMALLBINS + 1 && j != (NSMALLBINS / 2) * 3 && j != NBINS - 1) {
PRINT_GA (" │");
} else {
PRINT_GA (" └");
}
PRINT_GA (" chunksize:");
if (j != NBINS - 1) {
PRINTF_BA (" >= %06"PFMT64d" ", (ut64)apart[j - NSMALLBINS - 1]);
} else {
PRINT_BA (" remaining ");
}
}
GHT bin = m_arena + align + SZ * i - SZ * 2;
PRINTF_GA ("0x%"PFMT64x"->fd = ", (ut64)bin);
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(bins)[i]);
PRINT_GA (", ");
PRINTF_GA ("0x%"PFMT64x"->bk = ", (ut64)bin);
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(bins)[i + 1] );
PRINT_GA (", ");
r_cons_newline ();
}
PRINT_GA ("}\n");
PRINT_GA (" binmap = { ");
for (i = 0; i < BINMAPSIZE; i++) {
if (i) {
PRINT_GA (",");
}
PRINTF_BA ("0x%x", (ut32)main_arena->binmap[i]);
}
PRINT_GA ("}\n");
PRINT_GA (" next = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(next));
PRINT_GA (",\n");
PRINT_GA (" next_free = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(next_free));
PRINT_GA (",\n");
PRINT_GA (" system_mem = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(system_mem));
PRINT_GA (",\n");
PRINT_GA (" max_system_mem = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH(max_system_mem));
PRINT_GA (",\n");
PRINT_GA ("}\n\n");
}
static bool GH(r_resolve_main_arena)(RCore *core, GHT *m_arena) {
r_return_val_if_fail (core && core->dbg && core->dbg->maps, false);
if (core->dbg->main_arena_resolved) {
return true;
}
GHT brk_start = GHT_MAX, brk_end = GHT_MAX;
GHT libc_addr_sta = GHT_MAX, libc_addr_end = 0;
GHT addr_srch = GHT_MAX, heap_sz = GHT_MAX;
GHT main_arena_sym = GHT_MAX;
const bool is_debugged = r_config_get_b (core->config, "cfg.debug");
bool first_libc = true;
if (is_debugged) {
RListIter *iter;
RDebugMap *map;
r_debug_map_sync (core->dbg);
r_list_foreach (core->dbg->maps, iter, map) {
/* Try to find the main arena address using the glibc's symbols. */
if ((strstr (map->name, "/libc-") || strstr (map->name, "/libc."))
&& first_libc && main_arena_sym == GHT_MAX) {
first_libc = false;
main_arena_sym = GH (get_main_arena_with_symbol) (core, map);
}
if ((strstr (map->name, "/libc-") || strstr (map->name, "/libc."))
&& map->perm == R_PERM_RW) {
libc_addr_sta = map->addr;
libc_addr_end = map->addr_end;
break;
}
}
} else {
RIOBank *bank = r_io_bank_get (core->io, core->io->bank);
if (!bank) {
return false;
}
RIOMapRef *mapref;
RListIter *iter;
r_list_foreach (bank->maprefs, iter, mapref) {
RIOMap *map = r_io_map_get (core->io, mapref->id);
if (map->name && strstr (map->name, "arena")) {
libc_addr_sta = r_io_map_begin (map);
libc_addr_end = r_io_map_end (map);
break;
}
}
}
if (libc_addr_sta == GHT_MAX || libc_addr_end == GHT_MAX) {
const char *cmd = r_config_get_b (core->config, "cfg.debug")? "dm": "om";
R_LOG_WARN ("Can't find arena mapped in memory (see %s)", cmd);
return false;
}
GH(get_brks) (core, &brk_start, &brk_end);
if (brk_start == GHT_MAX || brk_end == GHT_MAX) {
R_LOG_ERROR ("No heap section found");
return false;
}
addr_srch = libc_addr_sta;
heap_sz = brk_end - brk_start;
MallocState *ta = R_NEW0 (MallocState);
if (!ta) {
return false;
}
if (main_arena_sym != GHT_MAX) {
GH (update_main_arena) (core, main_arena_sym, ta);
*m_arena = main_arena_sym;
core->dbg->main_arena_resolved = true;
free (ta);
return true;
}
while (addr_srch < libc_addr_end) {
GH (update_main_arena) (core, addr_srch, ta);
if (ta->GH(top) > brk_start && ta->GH(top) < brk_end &&
ta->GH(system_mem) == heap_sz) {
*m_arena = addr_srch;
free (ta);
if (is_debugged) {
core->dbg->main_arena_resolved = true;
}
return true;
}
addr_srch += sizeof (GHT);
}
R_LOG_WARN ("Can't find main_arena in mapped memory");
free (ta);
return false;
}
void GH(print_heap_chunk)(RCore *core) {
GH(RHeapChunk) *cnk = R_NEW0 (GH(RHeapChunk));
GHT chunk = core->offset;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (!cnk) {
return;
}
(void) r_io_read_at (core->io, chunk, (ut8 *)cnk, sizeof (*cnk));
PRINT_GA ("struct malloc_chunk @ ");
PRINTF_BA ("0x%"PFMT64x, (ut64)chunk);
PRINT_GA (" {\n prev_size = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)cnk->prev_size);
PRINT_GA (",\n size = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)cnk->size & ~(NON_MAIN_ARENA | IS_MMAPPED | PREV_INUSE));
PRINT_GA(",\n flags: |N:");
PRINTF_BA("%1"PFMT64u, (ut64)(cnk->size & NON_MAIN_ARENA ) >> 2);
PRINT_GA(" |M:");
PRINTF_BA("%1"PFMT64u, (ut64)(cnk->size & IS_MMAPPED) >> 1);
PRINT_GA(" |P:");
PRINTF_BA("%1"PFMT64u, (ut64)cnk->size & PREV_INUSE);
PRINT_GA (",\n fd = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)cnk->fd);
PRINT_GA (",\n bk = ");
PRINTF_BA ("0x%"PFMT64x, (ut64)cnk->bk);
if (cnk->size > SZ * 128) {
PRINT_GA (",\n fd-nextsize = ");
PRINTF_BA ("0x%"PFMT64x, (ut64) cnk->fd_nextsize);
PRINT_GA (",\n bk-nextsize = ");
PRINTF_BA ("0x%"PFMT64x, (ut64) cnk->bk_nextsize);
}
PRINT_GA (",\n}\n");
GHT size = ((cnk->size >> 3) << 3) - SZ * 2;
if (size > SZ * 128) {
PRINT_GA ("chunk too big to be displayed\n");
size = SZ * 128;
}
char *data = calloc (1, size);
if (data) {
r_io_read_at (core->io, chunk + SZ * 2, (ut8 *)data, size);
PRINT_GA ("chunk data = \n");
r_print_hexdump (core->print, chunk + SZ * 2, (ut8 *)data, size, SZ * 8, SZ, 1);
free (data);
}
free (cnk);
}
static bool GH(is_arena)(RCore *core, GHT m_arena, GHT m_state) {
if (m_arena == m_state) {
return true;
}
MallocState *ta = R_NEW0 (MallocState);
if (!ta) {
return false;
}
if (!GH(update_main_arena) (core, m_arena, ta)) {
free (ta);
return false;
}
if (ta->GH(next) == m_state) {
free (ta);
return true;
}
while (ta->GH(next) != GHT_MAX && ta->GH(next) != m_arena) {
if (!GH(update_main_arena) (core, ta->GH(next), ta)) {
free (ta);
return false;
}
if (ta->GH(next) == m_state) {
free (ta);
return true;
}
}
free (ta);
return false;
}
static int GH(print_double_linked_list_bin_simple)(RCore *core, GHT bin, MallocState *main_arena, GHT brk_start) {
GHT next = GHT_MAX;
int ret = 1;
GH(RHeapChunk) *cnk = R_NEW0 (GH(RHeapChunk));
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (!cnk) {
return -1;
}
r_io_read_at (core->io, bin, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
PRINTF_GA (" 0x%"PFMT64x, (ut64)bin);
if (cnk->fd != bin) {
ret = 0;
}
while (cnk->fd != bin) {
PRINTF_BA ("->fd = 0x%"PFMT64x, (ut64)cnk->fd);
next = cnk->fd;
if (next < brk_start || next > main_arena->GH(top)) {
PRINT_RA ("Double linked list corrupted\n");
free (cnk);
return -1;
}
r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
}
PRINTF_GA ("->fd = 0x%"PFMT64x, (ut64)cnk->fd);
next = cnk->fd;
if (next != bin) {
PRINT_RA ("Double linked list corrupted\n");
free (cnk);
return -1;
}
(void)r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
PRINTF_GA ("\n 0x%"PFMT64x, (ut64)bin);
while (cnk->bk != bin) {
PRINTF_BA ("->bk = 0x%"PFMT64x, (ut64) cnk->bk);
next = cnk->bk;
if (next < brk_start || next > main_arena->GH(top)) {
PRINT_RA ("Double linked list corrupted.\n");
free (cnk);
return -1;
}
(void)r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
}
PRINTF_GA ("->bk = 0x%"PFMT64x, (ut64)cnk->bk);
free (cnk);
return ret;
}
static int GH(print_double_linked_list_bin_graph)(RCore *core, GHT bin, MallocState *main_arena, GHT brk_start) {
RAGraph *g = r_agraph_new (r_cons_canvas_new (1, 1));
GHT next = GHT_MAX;
char title[256], chunk[256];
RANode *bin_node = NULL, *prev_node = NULL, *next_node = NULL;
GH(RHeapChunk) *cnk = R_NEW0 (GH(RHeapChunk));
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (!cnk || !g) {
free (cnk);
r_agraph_free (g);
return -1;
}
g->can->color = r_config_get_i (core->config, "scr.color");
(void)r_io_read_at (core->io, bin, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
snprintf (title, sizeof (title) - 1, "bin @ 0x%"PFMT64x"\n", (ut64)bin);
snprintf (chunk, sizeof (chunk) - 1, "fd: 0x%"PFMT64x"\nbk: 0x%"PFMT64x"\n",
(ut64)cnk->fd, (ut64)cnk->bk);
bin_node = r_agraph_add_node (g, title, chunk, NULL);
prev_node = bin_node;
while (cnk->bk != bin) {
next = cnk->bk;
if (next < brk_start || next > main_arena->GH(top)) {
PRINT_RA ("Double linked list corrupted\n");
free (cnk);
free (g);
return -1;
}
r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
snprintf (title, sizeof (title) - 1, "Chunk @ 0x%"PFMT64x"\n", (ut64)next);
snprintf (chunk, sizeof (chunk) - 1, "fd: 0x%"PFMT64x"\nbk: 0x%"PFMT64x"\n",
(ut64)cnk->fd, (ut64)cnk->bk);
next_node = r_agraph_add_node (g, title, chunk, NULL);
r_agraph_add_edge (g, prev_node, next_node, false);
r_agraph_add_edge (g, next_node, prev_node, false);
prev_node = next_node;
}
r_agraph_add_edge (g, prev_node, bin_node, false);
r_agraph_add_edge (g, bin_node, prev_node, false);
r_agraph_print (g);
free (cnk);
r_agraph_free (g);
return 0;
}
static int GH(print_double_linked_list_bin)(RCore *core, MallocState *main_arena, GHT m_arena, GHT offset, GHT num_bin, int graph) {
if (!core || !core->dbg || !core->dbg->maps) {
return -1;
}
int ret = 0;
GHT brk_start = GHT_MAX, brk_end = GHT_MAX, initial_brk = GHT_MAX;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (num_bin > 126) {
return -1;
}
GHT bin = main_arena->GH(bins)[num_bin];
if (!bin) {
return -1;
}
GH(get_brks) (core, &brk_start, &brk_end);
if (brk_start == GHT_MAX || brk_end == GHT_MAX) {
R_LOG_ERROR ("No heap section found");
return -1;
}
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
if (tcache) {
const int fc_offset = r_config_get_i (core->config, "dbg.glibc.fc_offset");
bin = m_arena + offset + SZ * num_bin * 2 + 10 * SZ;
initial_brk = ( (brk_start >> 12) << 12 ) + fc_offset;
} else {
bin = m_arena + offset + SZ * num_bin * 2 - SZ * 2;
initial_brk = (brk_start >> 12) << 12;
}
switch (num_bin) {
case 0:
PRINT_GA (" double linked list unsorted bin {\n");
break;
case 1 ... NSMALLBINS - 1:
PRINT_GA (" double linked list small bin {\n");
break;
case NSMALLBINS ... NBINS - 2:
PRINT_GA (" double linked list large bin {\n");
break;
}
if (!graph || graph == 1) {
ret = GH(print_double_linked_list_bin_simple)(core, bin, main_arena, initial_brk);
} else {
ret = GH(print_double_linked_list_bin_graph)(core, bin, main_arena, initial_brk);
}
PRINT_GA ("\n }\n");
return ret;
}
static void GH(print_heap_bin)(RCore *core, GHT m_arena, MallocState *main_arena, const char *input) {
int i, j = 2;
GHT num_bin = GHT_MAX;
GHT offset;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
if (tcache) {
offset = 16;
} else {
offset = 12 * SZ + sizeof (int) * 2;
}
switch (input[0]) {
case '\0': // dmhb
PRINT_YA ("Bins {\n");
for (i = 0; i < NBINS - 1; i++) {
PRINTF_YA (" Bin %03d:\n", i + 1);
GH(print_double_linked_list_bin) (core, main_arena, m_arena, offset, i, 0);
}
PRINT_YA ("\n}\n");
break;
case ' ': // dmhb [bin_num]
j--; // for spaces after input
// fallthrough
case 'g': // dmhbg [bin_num]
num_bin = r_num_get (NULL, input + j) - 1;
if (num_bin > NBINS - 2) {
R_LOG_ERROR ("0 < bin <= %d", NBINS - 1);
break;
}
PRINTF_YA (" Bin %03"PFMT64u":\n", (ut64)num_bin + 1);
GH(print_double_linked_list_bin) (core, main_arena, m_arena, offset, num_bin, j);
break;
}
}
static int GH(print_single_linked_list_bin)(RCore *core, MallocState *main_arena, GHT m_arena, GHT offset, GHT bin_num, bool demangle) {
if (!core || !core->dbg || !core->dbg->maps) {
return -1;
}
GHT next = GHT_MAX, brk_start = GHT_MAX, brk_end = GHT_MAX;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
GH(RHeapChunk) *cnk = R_NEW0 (GH(RHeapChunk));
if (!cnk) {
return 0;
}
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
free (cnk);
return 0;
}
GHT bin = main_arena->GH(fastbinsY)[bin_num];
if (!bin) {
free (cnk);
return -1;
}
bin = m_arena + offset + SZ * bin_num;
r_io_read_at (core->io, bin, (ut8 *)&next, SZ);
GH(get_brks) (core, &brk_start, &brk_end);
if (brk_start == GHT_MAX || brk_end == GHT_MAX) {
R_LOG_ERROR ("No heap section found");
free (cnk);
return 0;
}
PRINTF_GA (" fastbin %"PFMT64d" @ ", (ut64)bin_num + 1);
PRINTF_GA ("0x%"PFMT64x" {\n ", (ut64)bin);
GHT size = main_arena->GH(top) - brk_start;
GHT next_root = next, next_tmp = next, double_free = GHT_MAX;
while (next && next >= brk_start && next < main_arena->GH(top)) {
PRINTF_BA ("0x%"PFMT64x, (ut64)next);
while (double_free == GHT_MAX && next_tmp && next_tmp >= brk_start && next_tmp <= main_arena->GH(top)) {
r_io_read_at (core->io, next_tmp, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
next_tmp = (!demangle) ? cnk->fd : PROTECT_PTR (next_tmp, cnk->fd);
if (cnk->prev_size > size || ((cnk->size >> 3) << 3) > size) {
break;
}
if (next_root == next_tmp) {
double_free = next_root;
break;
}
}
r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
next = (!demangle) ? cnk->fd : PROTECT_PTR (next, cnk->fd);
PRINTF_BA ("%s", next ? "->fd = " : "");
if (cnk->prev_size > size || ((cnk->size >> 3) << 3) > size) {
PRINTF_RA (" 0x%"PFMT64x, (ut64)next);
PRINT_RA (" Linked list corrupted\n");
PRINT_GA ("\n }\n");
free (cnk);
return -1;
}
next_root = next_tmp = next;
if (double_free == next) {
PRINTF_RA ("0x%"PFMT64x, (ut64)next);
PRINT_RA (" Double free detected\n");
PRINT_GA ("\n }\n");
free (cnk);
return -1;
}
}
if (next && (next < brk_start || next >= main_arena->GH(top))) {
PRINTF_RA ("0x%"PFMT64x, (ut64)next);
PRINT_RA (" Linked list corrupted\n");
PRINT_GA ("\n }\n");
free (cnk);
return -1;
}
PRINT_GA ("\n }\n");
free (cnk);
return 0;
}
void GH(print_heap_fastbin)(RCore *core, GHT m_arena, MallocState *main_arena, GHT global_max_fast, const char *input, bool demangle) {
int i;
GHT num_bin = GHT_MAX, offset = sizeof (int) * 2;
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (tcache) {
offset = 16;
}
switch (input[0]) {
case '\0': // dmhf
if (core->offset != core->prompt_offset) {
m_arena = core->offset;
}
PRINT_YA ("fastbinY {\n");
for (i = 1; i <= NFASTBINS; i++) {
if (FASTBIN_IDX_TO_SIZE(i) <= global_max_fast) {
PRINTF_YA (" Fastbin %02d\n", i);
} else {
PRINTF_RA (" Fastbin %02d\n", i);
}
if (GH(print_single_linked_list_bin) (core, main_arena, m_arena, offset, i - 1, demangle)) {
PRINT_GA (" Empty bin");
PRINT_BA (" 0x0\n");
}
}
PRINT_YA ("}\n");
break;
case ' ': // dmhf [bin_num]
num_bin = r_num_get (NULL, input) - 1;
if (num_bin >= NFASTBINS) {
R_LOG_ERROR ("0 < bin <= %d", NFASTBINS);
break;
}
if (GH(print_single_linked_list_bin)(core, main_arena, m_arena, offset, num_bin, demangle)) {
PRINT_GA (" Empty bin");
PRINT_BA (" 0x0\n");
}
break;
}
}
static GH (RTcache)* GH (tcache_new) (RCore *core) {
r_return_val_if_fail (core, NULL);
GH (RTcache) *tcache = R_NEW0 (GH (RTcache));
if (core->dbg->glibc_version >= TCACHE_NEW_VERSION) {
tcache->type = NEW;
tcache->RHeapTcache.heap_tcache = R_NEW0(GH (RHeapTcache));
} else {
tcache->type = OLD;
tcache->RHeapTcache.heap_tcache_pre_230 = R_NEW0(GH (RHeapTcachePre230));
}
return tcache;
}
static void GH (tcache_free) (GH (RTcache)* tcache) {
r_return_if_fail (tcache);
tcache->type == NEW
? free (tcache->RHeapTcache.heap_tcache)
: free (tcache->RHeapTcache.heap_tcache_pre_230);
free (tcache);
}
static bool GH (tcache_read) (RCore *core, GHT tcache_start, GH (RTcache)* tcache) {
r_return_val_if_fail (core && tcache, false);
return tcache->type == NEW
? r_io_read_at (core->io, tcache_start, (ut8 *)tcache->RHeapTcache.heap_tcache, sizeof (GH (RHeapTcache)))
: r_io_read_at (core->io, tcache_start, (ut8 *)tcache->RHeapTcache.heap_tcache_pre_230, sizeof (GH (RHeapTcachePre230)));
}
static int GH (tcache_get_count) (GH (RTcache)* tcache, int index) {
r_return_val_if_fail (tcache, 0);
return tcache->type == NEW
? tcache->RHeapTcache.heap_tcache->counts[index]
: tcache->RHeapTcache.heap_tcache_pre_230->counts[index];
}
static GHT GH (tcache_get_entry) (GH (RTcache)* tcache, int index) {
r_return_val_if_fail (tcache, 0);
return tcache->type == NEW
? tcache->RHeapTcache.heap_tcache->entries[index]
: tcache->RHeapTcache.heap_tcache_pre_230->entries[index];
}
static void GH (tcache_print) (RCore *core, GH (RTcache)* tcache, bool demangle) {
r_return_if_fail (core && tcache);
GHT tcache_fd = GHT_MAX;
GHT tcache_tmp = GHT_MAX;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
size_t i;
for (i = 0; i < TCACHE_MAX_BINS; i++) {
int count = GH (tcache_get_count) (tcache, i);
GHT entry = GH (tcache_get_entry) (tcache, i);
if (entry == GHT_MAX) {
break;
}
if (count > 0) {
PRINT_GA ("bin :");
PRINTF_BA ("%2zu", i);
PRINT_GA (", items :");
PRINTF_BA ("%2d", count);
PRINT_GA (", fd :");
PRINTF_BA ("0x%"PFMT64x, (ut64)(entry - GH (HDR_SZ)));
if (count > 1) {
tcache_fd = entry;
size_t n;
for (n = 1; n < count; n++) {
bool r = r_io_read_at (core->io, tcache_fd, (ut8 *)&tcache_tmp, sizeof (GHT));
if (!r) {
break;
}
tcache_tmp = (!demangle)
? read_le (&tcache_tmp)
: PROTECT_PTR (tcache_fd, read_le (&tcache_tmp));
PRINTF_BA ("->0x%"PFMT64x, (ut64)(tcache_tmp - TC_HDR_SZ));
tcache_fd = tcache_tmp;
}
}
PRINT_BA ("\n");
}
}
}
static void GH (print_tcache_instance)(RCore *core, GHT m_arena, MallocState *main_arena, bool demangle) {
r_return_if_fail (core && core->dbg && core->dbg->maps);
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
if (!tcache || m_arena == GHT_MAX) {
return;
}
GHT brk_start = GHT_MAX, brk_end = GHT_MAX, initial_brk = GHT_MAX;
GH (get_brks) (core, &brk_start, &brk_end);
GHT tcache_start = GHT_MAX;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
tcache_start = brk_start + 0x10;
GHT fc_offset = GH (tcache_chunk_size) (core, brk_start);
initial_brk = brk_start + fc_offset;
if (brk_start == GHT_MAX || brk_end == GHT_MAX || initial_brk == GHT_MAX) {
R_LOG_ERROR ("No heap section found");
return;
}
GH (RTcache)* r_tcache = GH (tcache_new) (core);
if (!r_tcache) {
return;
}
if (!GH (tcache_read) (core, tcache_start, r_tcache)) {
return;
}
PRINT_GA ("Tcache main arena @");
PRINTF_BA (" 0x%"PFMT64x"\n", (ut64)m_arena);
GH (tcache_print) (core, r_tcache, demangle);
if (main_arena->GH (next) != m_arena) {
GHT mmap_start = GHT_MAX, tcache_start = GHT_MAX;
MallocState *ta = R_NEW0 (MallocState);
if (!ta) {
free (ta);
GH (tcache_free) (r_tcache);
return;
}
ta->GH (next) = main_arena->GH (next);
while (GH (is_arena) (core, m_arena, ta->GH (next)) && ta->GH (next) != m_arena) {
PRINT_YA ("Tcache thread arena @ ");
PRINTF_BA (" 0x%"PFMT64x, (ut64)ta->GH (next));
mmap_start = ((ta->GH (next) >> 16) << 16);
tcache_start = mmap_start + sizeof (GH (RHeapInfo)) + sizeof (GH (RHeap_MallocState_tcache)) + GH (MMAP_ALIGN);
if (!GH (update_main_arena) (core, ta->GH (next), ta)) {
free (ta);
GH (tcache_free) (r_tcache);
return;
}
if (ta->attached_threads) {
PRINT_BA ("\n");
GH (tcache_read) (core, tcache_start, r_tcache);
GH (tcache_print) (core, r_tcache, demangle);
} else {
PRINT_GA (" free\n");
}
}
}
GH (tcache_free) (r_tcache);
}
static void GH(print_heap_segment)(RCore *core, MallocState *main_arena,
GHT m_arena, GHT m_state, GHT global_max_fast, int format_out) {
if (!core || !core->dbg || !core->dbg->maps) {
return;
}
int w, h;
GHT brk_start = GHT_MAX, brk_end = GHT_MAX, size_tmp, min_size = SZ * 4;
GHT tcache_fd = GHT_MAX, tcache_tmp = GHT_MAX;
GHT initial_brk = GHT_MAX, tcache_initial_brk = GHT_MAX;
const int tcache = r_config_get_i (core->config, "dbg.glibc.tcache");
const int offset = r_config_get_i (core->config, "dbg.glibc.fc_offset");
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
int glibc_version = core->dbg->glibc_version;
if (m_arena == m_state) {
GH(get_brks) (core, &brk_start, &brk_end);
if (tcache) {
initial_brk = ((brk_start >> 12) << 12) + GH(HDR_SZ);
if (r_config_get_b (core->config, "cfg.debug")) {
tcache_initial_brk = initial_brk;
}
initial_brk += (glibc_version < 230)
? sizeof (GH (RHeapTcachePre230))
: sizeof (GH (RHeapTcache));
} else {
initial_brk = (brk_start >> 12) << 12;
}
} else {
brk_start = ((m_state >> 16) << 16) ;
brk_end = brk_start + main_arena->GH(system_mem);
if (tcache) {
tcache_initial_brk = brk_start + sizeof (GH(RHeapInfo)) + sizeof (GH(RHeap_MallocState_tcache)) + GH(MMAP_ALIGN);
initial_brk = tcache_initial_brk + offset;
} else {
initial_brk = brk_start + sizeof (GH(RHeapInfo)) + sizeof (GH(RHeap_MallocState)) + MMAP_OFFSET;
}
}
if (brk_start == GHT_MAX || brk_end == GHT_MAX || initial_brk == GHT_MAX) {
R_LOG_ERROR ("No heap section");
return;
}
GHT next_chunk = initial_brk, prev_chunk = next_chunk;
GH(RHeapChunk) *cnk = R_NEW0 (GH(RHeapChunk));
if (!cnk) {
return;
}
GH(RHeapChunk) *cnk_next = R_NEW0 (GH(RHeapChunk));
if (!cnk_next) {
free (cnk);
return;
}
RConfigHold *hc = r_config_hold_new (core->config);
if (!hc) {
free (cnk);
free (cnk_next);
return;
}
w = r_cons_get_size (&h);
RConsCanvas *can = r_cons_canvas_new (w, h);
if (!can) {
free (cnk);
free (cnk_next);
r_config_hold_free (hc);
return;
}
RAGraph *g = r_agraph_new (can);
if (!g) {
free (cnk);
free (cnk_next);
r_cons_canvas_free (can);
r_config_hold_restore (hc);
r_config_hold_free (hc);
return;
}
RANode *top = {0}, *chunk_node = {0}, *prev_node = {0};
char *top_title, *top_data, *node_title, *node_data;
bool first_node = true;
top_data = r_str_new ("");
top_title = r_str_new ("");
if (!r_io_read_at (core->io, next_chunk, (ut8 *)cnk, sizeof (GH(RHeapChunk)))) {
R_LOG_ERROR ("Cannot read");
free (cnk);
free (cnk_next);
r_cons_canvas_free (can);
r_config_hold_restore (hc);
r_config_hold_free (hc);
return;
}
size_tmp = (cnk->size >> 3) << 3;
ut64 prev_chunk_addr;
ut64 prev_chunk_size;
PJ *pj = NULL;
switch (format_out) {
case 'j':
pj = r_core_pj_new (core);
if (!pj) {
return;
}
pj_o (pj);
pj_ka (pj, "chunks");
break;
case '*':
r_cons_printf ("fs+heap.allocated\n");
break;
case 'g':
can->linemode = r_config_get_i (core->config, "graph.linemode");
can->color = r_config_get_i (core->config, "scr.color");
core->cons->use_utf8 = r_config_get_i (core->config, "scr.utf8");
g->layout = r_config_get_i (core->config, "graph.layout");
r_agraph_set_title (g, "Heap Layout");
top_title = r_str_newf ("Top chunk @ 0x%"PFMT64x"\n", (ut64)main_arena->GH(top));
}
while (next_chunk && next_chunk >= brk_start && next_chunk < main_arena->GH(top)) {
if (size_tmp < min_size || next_chunk + size_tmp > main_arena->GH(top)) {
const char *status = "corrupted";
switch (format_out) {
case 'c':
PRINT_YA ("\n Malloc chunk @ ");
PRINTF_BA ("0x%"PFMT64x" ", (ut64)next_chunk);
PRINTF_RA ("[%s]\n",status);
PRINTF_RA (" size: 0x%"PFMT64x"\n fd: 0x%"PFMT64x", bk: 0x%"PFMT64x"\n",
(ut64)cnk->size, (ut64)cnk->fd, (ut64)cnk->bk);
break;
case 'j':
pj_o (pj);
pj_kn (pj, "addr", next_chunk);
pj_kn (pj, "size", cnk->size);
pj_ks (pj, "status", status);
pj_kN (pj, "fd", cnk->fd);
pj_kN (pj, "bk", cnk->bk);
pj_end (pj);
break;
case '*':
r_cons_printf ("fs heap.corrupted\n");
ut64 chunkflag = (ut64)((prev_chunk >> 4) & 0xffffULL);
r_cons_printf ("f chunk.corrupted.%06"PFMT64x" %d 0x%"PFMT64x"\n",
chunkflag, (int)cnk->size, (ut64)prev_chunk);
break;
case 'g':
node_title = r_str_newf (" Malloc chunk @ 0x%"PFMT64x" ", (ut64)prev_chunk);
node_data = r_str_newf ("[corrupted] size: 0x%"PFMT64x"\n fd: 0x%"PFMT64x", bk: 0x%"PFMT64x
"\nHeap graph could not be recovered\n", (ut64)cnk->size, (ut64)cnk->fd, (ut64)cnk->bk);
r_agraph_add_node (g, node_title, node_data, NULL);
if (first_node) {
first_node = false;
}
break;
}
break;
}
prev_chunk_addr = (ut64)prev_chunk;
prev_chunk_size = (((ut64)cnk->size) >> 3) << 3;
bool fastbin = size_tmp >= SZ * 4 && size_tmp <= global_max_fast;
bool is_free = false, double_free = false;
if (fastbin) {
int i = (size_tmp / (SZ * 2)) - 2;
GHT idx = (GHT)main_arena->GH(fastbinsY)[i];
(void)r_io_read_at (core->io, idx, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
GHT next = GH (get_next_pointer) (core, idx, cnk->fd);
if (prev_chunk == idx && idx && !next) {
is_free = true;
}
while (next && next >= brk_start && next < main_arena->GH(top)) {
if (prev_chunk == idx || prev_chunk == next || idx == next) {
is_free = true;
if (idx == next) {
double_free = true;
break;
}
(void)r_io_read_at (core->io, next, (ut8 *)cnk_next, sizeof (GH(RHeapChunk)));
GHT next_node = GH (get_next_pointer) (core, next, cnk_next->fd);
// avoid triple while?
while (next_node && next_node >= brk_start && next_node < main_arena->GH(top)) {
if (prev_chunk == next_node) {
double_free = true;
break;
}
(void)r_io_read_at (core->io, next_node, (ut8 *)cnk_next, sizeof (GH(RHeapChunk)));
next_node = GH (get_next_pointer) (core, next_node, cnk_next->fd);
}
if (double_free) {
break;
}
}
(void)r_io_read_at (core->io, next, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
next = GH (get_next_pointer) (core, next, cnk->fd);
}
if (double_free) {
PRINT_RA (" Double free in simple-linked list detected ");
break;
}
prev_chunk_size = ((i + 1) * GH(HDR_SZ)) + GH(HDR_SZ);
}
if (tcache) {
GH(RTcache)* tcache_heap = GH (tcache_new) (core);
if (!tcache_heap) {
r_cons_canvas_free (can);
r_config_hold_restore (hc);
r_config_hold_free (hc);
free (g);
free (cnk);
free (cnk_next);
return;
}
GH (tcache_read) (core, tcache_initial_brk, tcache_heap);
size_t i;
for (i = 0; i < TCACHE_MAX_BINS; i++) {
int count = GH (tcache_get_count) (tcache_heap, i);
GHT entry = GH (tcache_get_entry) (tcache_heap, i);
if (count > 0) {
if (entry - SZ * 2 == prev_chunk) {
is_free = true;
prev_chunk_size = ((i + 1) * TC_HDR_SZ + GH(TC_SZ));
break;
}
if (count > 1) {
tcache_fd = entry;
int n;
for (n = 1; n < count; n++) {
bool r = r_io_read_at (core->io, tcache_fd, (ut8*)&tcache_tmp, sizeof (GHT));
if (!r) {
break;
}
tcache_tmp = GH (get_next_pointer) (core, tcache_fd, read_le (&tcache_tmp));
if (tcache_tmp - SZ * 2 == prev_chunk) {
is_free = true;
prev_chunk_size = ((i + 1) * TC_HDR_SZ + GH(TC_SZ));
break;
}
tcache_fd = (ut64)tcache_tmp;
}
}
}
}
GH (tcache_free) (tcache_heap);
}
next_chunk += size_tmp;
prev_chunk = next_chunk;
r_io_read_at (core->io, next_chunk, (ut8 *)cnk, sizeof (GH(RHeapChunk)));
size_tmp = (cnk->size >> 3) << 3;
const char *status = "allocated";
if (fastbin) {
if (is_free) {
status = "free";
}
}
if (!(cnk->size & 1)) {
status = "free";
}
if (tcache) {
if (is_free) {
status = "free";
}
}
switch (format_out) {
case 'c':
PRINT_YA ("\n Malloc chunk @ ");
PRINTF_BA ("0x%"PFMT64x" ", prev_chunk_addr);
PRINT_GA ("[size: ");
PRINTF_BA ("0x%"PFMT64x, prev_chunk_size);
PRINTF_GA ("][%s]",status);
break;
case 'j':
pj_o (pj);
pj_kn (pj, "addr", prev_chunk_addr);
pj_kn (pj, "size", prev_chunk_size);
pj_ks (pj, "status", status);
pj_end (pj);
break;
case '*':
r_cons_printf ("fs heap.%s\n", status);
ut64 chunkat = (prev_chunk_addr>>4) & 0xffff;
r_cons_printf ("f chunk.%06"PFMT64x" %d 0x%"PFMT64x"\n", chunkat, (int)prev_chunk_size, (ut64)prev_chunk_addr);
break;
case 'g':
node_title = r_str_newf (" Malloc chunk @ 0x%"PFMT64x" ", (ut64)prev_chunk_addr);
node_data = r_str_newf ("size: 0x%"PFMT64x" status: %s\n", (ut64)prev_chunk_size, status);
chunk_node = r_agraph_add_node (g, node_title, node_data, NULL);
if (first_node) {
first_node = false;
} else {
r_agraph_add_edge (g, prev_node, chunk_node, false);
}
prev_node = chunk_node;
break;
}
}
switch (format_out) {
case 'c':
PRINT_YA ("\n Top chunk @ ");
PRINTF_BA ("0x%"PFMT64x, (ut64)main_arena->GH (top));
PRINT_GA (" - [brk_start: ");
PRINTF_BA ("0x%"PFMT64x, (ut64)brk_start);
PRINT_GA (", brk_end: ");
PRINTF_BA ("0x%"PFMT64x, (ut64)brk_end);
PRINT_GA ("]\n");
break;
case 'j':
pj_end (pj);
pj_kn (pj, "top", main_arena->GH(top));
pj_kn (pj, "brk", brk_start);
pj_kn (pj, "end", brk_end);
pj_end (pj);
r_cons_print (pj_string (pj));
pj_free (pj);
break;
case '*':
r_cons_printf ("fs-\n");
r_cons_printf ("f heap.top = 0x%08"PFMT64x"\n", (ut64)main_arena->GH (top));
r_cons_printf ("f heap.brk = 0x%08"PFMT64x"\n", (ut64)brk_start);
r_cons_printf ("f heap.end = 0x%08"PFMT64x"\n", (ut64)brk_end);
break;
case 'g':
top = r_agraph_add_node (g, top_title, top_data, NULL);
if (!first_node) {
r_agraph_add_edge (g, prev_node, top, false);
free (node_data);
free (node_title);
}
r_agraph_print (g);
r_cons_canvas_free (can);
r_config_hold_restore (hc);
r_config_hold_free (hc);
break;
}
r_cons_newline ();
free (g);
free (top_data);
free (top_title);
free (cnk);
free (cnk_next);
}
void GH(print_malloc_states)( RCore *core, GHT m_arena, MallocState *main_arena) {
MallocState *ta = R_NEW0 (MallocState);
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (!ta) {
return;
}
PRINT_YA ("main_arena @ ");
PRINTF_BA ("0x%"PFMT64x"\n", (ut64)m_arena);
if (main_arena->GH(next) != m_arena) {
ta->GH(next) = main_arena->GH(next);
while (GH(is_arena) (core, m_arena, ta->GH(next)) && ta->GH(next) != m_arena) {
PRINT_YA ("thread arena @ ");
PRINTF_BA ("0x%"PFMT64x, (ut64)ta->GH(next));
// if the next pointer is equal to unsigned -1 we assume its invalid
// and return. otherwise we get undefined behavior and weird output offten
// times with thousands of lines in the output
// saying thread arenas are at 0xffff... which is obviously incorrect
// related to issue #20767
if (ta->GH(next) == GHT_MAX) {
break;
}
if (!GH(update_main_arena) (core, ta->GH(next), ta)) {
free (ta);
return;
}
if (ta->attached_threads) {
PRINT_BA ("\n");
} else {
PRINT_GA (" free\n");
}
}
}
free (ta);
}
void GH(print_inst_minfo)(GH(RHeapInfo) *heap_info, GHT hinfo) {
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
PRINT_YA ("malloc_info @ ");
PRINTF_BA ("0x%"PFMT64x, (ut64)hinfo);
PRINT_YA (" {\n ar_ptr = " );
PRINTF_BA ("0x%"PFMT64x"\n", (ut64)heap_info->ar_ptr);
PRINT_YA (" prev = ");
PRINTF_BA ("0x%"PFMT64x"\n", (ut64)heap_info->prev);
PRINT_YA (" size = ");
PRINTF_BA ("0x%"PFMT64x"\n", (ut64)heap_info->size);
PRINT_YA (" mprotect_size = ");
PRINTF_BA ("0x%"PFMT64x"\n", (ut64)heap_info->mprotect_size);
PRINT_YA ("}\n\n");
}
void GH(print_malloc_info)(RCore *core, GHT m_state, GHT malloc_state) {
GHT h_info;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
if (malloc_state == m_state) {
PRINT_RA ("main_arena does not have an instance of malloc_info\n");
} else if (GH(is_arena) (core, malloc_state, m_state)) {
h_info = (malloc_state >> 16) << 16;
GH(RHeapInfo) *heap_info = R_NEW0 (GH(RHeapInfo));
if (!heap_info) {
return;
}
r_io_read_at (core->io, h_info, (ut8*)heap_info, sizeof (GH(RHeapInfo)));
GH(print_inst_minfo) (heap_info, h_info);
MallocState *ms = R_NEW0 (MallocState);
if (!ms) {
free (heap_info);
return;
}
while (heap_info->prev != 0x0 && heap_info->prev != GHT_MAX) {
if (!GH(update_main_arena) (core, malloc_state, ms)) {
free (ms);
free (heap_info);
return;
}
if ((ms->GH(top) >> 16) << 16 != h_info) {
h_info = (ms->GH(top) >> 16) << 16;
r_io_read_at (core->io, h_info, (ut8*)heap_info, sizeof (GH(RHeapInfo)));
GH(print_inst_minfo) (heap_info, h_info);
}
}
free (heap_info);
free (ms);
} else {
PRINT_RA ("This address is not part of the arenas\n");
}
}
static const char* GH(help_msg)[] = {
"Usage:", " dmh", " # Memory map heap",
"dmh", "", "List the chunks inside the heap segment",
"dmh", " @[malloc_state]", "List heap chunks of a particular arena",
"dmha", "", "List all malloc_state instances in application",
"dmhb", " @[malloc_state]", "Display all parsed Double linked list of main_arena's or a particular arena bins instance",
"dmhb", " [bin_num|bin_num:malloc_state]", "Display parsed double linked list of bins instance from a particular arena",
"dmhbg"," [bin_num]", "Display double linked list graph of main_arena's bin [Under developemnt]",
"dmhc", " @[chunk_addr]", "Display malloc_chunk struct for a given malloc chunk",
"dmhf", " @[malloc_state]", "Display all parsed fastbins of main_arena's or a particular arena fastbinY instance",
"dmhf", " [fastbin_num|fastbin_num:malloc_state]", "Display parsed single linked list in fastbinY instance from a particular arena",
"dmhg", "", "Display heap graph of heap segment",
"dmhg", " [malloc_state]", "Display heap graph of a particular arena",
"dmhi", " @[malloc_state]", "Display heap_info structure/structures for a given arena",
"dmhj", "", "List the chunks inside the heap segment in JSON format",
"dmhm", "", "List all elements of struct malloc_state of main thread (main_arena)",
"dmhm", " @[malloc_state]", "List all malloc_state instance of a particular arena",
"dmht", "", "Display all parsed thread cache bins of all arena's tcache instance",
"dmh?", "", "Show map heap help",
NULL
};
static int GH(cmd_dbg_map_heap_glibc)(RCore *core, const char *input) {
static GHT m_arena = GHT_MAX, m_state = GHT_MAX;
RConsPrintablePalette *pal = &r_cons_singleton ()->context->pal;
GHT global_max_fast = (64 * SZ / 4);
MallocState *main_arena = R_NEW0 (MallocState);
if (!main_arena) {
return false;
}
r_config_set_b (core->config, "dbg.glibc.tcache", GH(is_tcache) (core));
int format = 'c';
bool get_state = false;
switch (input[0]) {
case ' ' : // dmh [malloc_state]
m_state = r_num_get (NULL, input);
get_state = true;
case '\0': // dmh
if (GH(r_resolve_main_arena) (core, &m_arena)) {
if (core->offset != core->prompt_offset) {
m_state = core->offset;
} else {
if (!get_state) {
m_state = m_arena;
}
}
if (GH(is_arena) (core, m_arena, m_state)) {
if (!GH(update_main_arena) (core, m_state, main_arena)) {
break;
}
GH(print_heap_segment) (core, main_arena, m_arena, m_state, global_max_fast, format);
break;
} else {
PRINT_RA ("This address is not part of the arenas\n");
break;
}
}
break;
case 'a': // dmha
if (GH(r_resolve_main_arena) (core, &m_arena)) {
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
GH(print_malloc_states) (core, m_arena, main_arena);
}
break;
case 'i': // dmhi
if (GH(r_resolve_main_arena) (core, &m_arena)) {
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
input += 1;
if (!strcmp (input, "\0")) {
if (core->offset != core->prompt_offset) {
m_state = core->offset;
}
} else {
m_state = r_num_get (NULL, input);
}
GH(print_malloc_info) (core, m_arena, m_state);
}
break;
case 'm': // "dmhm"
if (GH(r_resolve_main_arena) (core, &m_arena)) {
switch (input[1]) {
case '*':
format = '*';
input += 1;
break;
case 'j':
format = 'j';
input += 1;
break;
}
input += 1;
if (!strcmp (input, "\0")) {
if (core->offset != core->prompt_offset) {
m_arena = core->offset;
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
} else {
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
}
} else {
m_arena = r_num_get (NULL, input);
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
}
GH(print_arena_stats) (core, m_arena, main_arena, global_max_fast, format);
}
break;
case 'b': // "dmhb"
if (GH(r_resolve_main_arena) (core, &m_arena)) {
char *m_state_str, *dup = strdup (input + 1);
if (*dup) {
strtok (dup, ":");
m_state_str = strtok (NULL, ":");
m_state = r_num_get (NULL, m_state_str);
if (!m_state) {
m_state = m_arena;
}
} else {
if (core->offset != core->prompt_offset) {
m_state = core->offset;
} else {
m_state = m_arena;
}
}
if (GH(is_arena) (core, m_arena, m_state)) {
if (!GH(update_main_arena) (core, m_state, main_arena)) {
free (dup);
break;
}
GH(print_heap_bin) (core, m_state, main_arena, dup);
} else {
PRINT_RA ("This address is not part of the arenas\n");
free (dup);
break;
}
free (dup);
}
break;
case 'c': // "dmhc"
if (GH(r_resolve_main_arena)(core, &m_arena)) {
GH(print_heap_chunk) (core);
}
break;
case 'f': // "dmhf"
if (GH(r_resolve_main_arena) (core, &m_arena)) {
bool demangle = r_config_get_i (core->config, "dbg.glibc.demangle");
char *m_state_str, *dup = strdup (input + 1);
if (*dup) {
strtok (dup, ":");
m_state_str = strtok (NULL, ":");
m_state = r_num_get (NULL, m_state_str);
if (!m_state) {
m_state = m_arena;
}
} else {
if (core->offset != core->prompt_offset) {
m_state = core->offset;
} else {
m_state = m_arena;
}
}
if (GH(is_arena) (core, m_arena, m_state)) {
if (!GH(update_main_arena) (core, m_state, main_arena)) {
free (dup);
break;
}
GH(print_heap_fastbin) (core, m_state, main_arena, global_max_fast, dup, demangle);
} else {
PRINT_RA ("This address is not part of the arenas\n");
free (dup);
break;
}
free (dup);
}
break;
case 'g': //dmhg
if (input[0] == 'g') {
format = 'g';
}
case '*': //dmh*
if (input[0] == '*') {
format = '*';
}
case 'j': // "dmhj"
if (input[0] == 'j') {
format = 'j';
}
if (GH(r_resolve_main_arena) (core, &m_arena)) {
input += 1;
if (!strcmp (input, "\0")) {
if (core->offset != core->prompt_offset) {
m_state = core->offset;
get_state = true;
}
} else {
m_state = r_num_get (NULL, input);
get_state = true;
}
if (!get_state) {
m_state = m_arena;
}
if (GH(is_arena) (core, m_arena, m_state)) {
if (!GH(update_main_arena) (core, m_state, main_arena)) {
break;
}
GH(print_heap_segment) (core, main_arena, m_arena, m_state, global_max_fast, format);
} else {
PRINT_RA ("This address is not part of the arenas\n");
}
}
break;
case 't':
if (GH(r_resolve_main_arena) (core, &m_arena)) {
if (!GH(update_main_arena) (core, m_arena, main_arena)) {
break;
}
bool demangle = r_config_get_i (core->config, "dbg.glibc.demangle");
GH(print_tcache_instance) (core, m_arena, main_arena, demangle);
}
break;
case '?':
r_core_cmd_help (core, GH(help_msg));
break;
}
free (main_arena);
return true;
}
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