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provide working malloc_info outside Android too

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This commit is contained in:
Daniel Micay 2019-04-19 16:54:43 -04:00
parent 494436c904
commit 409a639312
2 changed files with 54 additions and 2 deletions
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54
h_malloc.c
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@ -1,9 +1,11 @@
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <stdatomic.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#if N_ARENA > 1
#include <threads.h>
#endif
@ -1726,14 +1728,64 @@ EXPORT struct mallinfo h_mallinfo(void) {
}
#endif
#ifdef __GLIBC__
#ifndef __ANDROID__
EXPORT int h_malloc_info(int options, UNUSED FILE *fp) {
if (options) {
errno = EINVAL;
return -1;
}
#if CONFIG_STATS
fputs("<malloc version=\"hardened_malloc-1\">", fp);
for (unsigned arena = 0; arena < N_ARENA; arena++) {
fprintf(fp, "<heap nr=\"%u\">", arena);
for (unsigned class = 0; class < N_SIZE_CLASSES; class++) {
struct size_class *c = &ro.size_class_metadata[arena][class];
u64 nmalloc;
u64 ndalloc;
size_t slab_allocated;
size_t allocated;
mutex_lock(&c->lock);
nmalloc = c->nmalloc;
ndalloc = c->ndalloc;
slab_allocated = c->slab_allocated;
allocated = c->allocated;
mutex_unlock(&c->lock);
if (nmalloc || ndalloc || slab_allocated || allocated) {
fprintf(fp, "<bin nr=\"%u\" size=\"%" PRIu32 "\">", class, size_classes[class]);
fprintf(fp, "<nmalloc>%" PRIu64 "</nmalloc>", nmalloc);
fprintf(fp, "<ndalloc>%" PRIu64 "</ndalloc>", ndalloc);
fprintf(fp, "<slab_allocated>%zu</slab_allocated>", slab_allocated);
fprintf(fp, "<allocated>%zu</allocated>", allocated);
fputs("</bin>", fp);
}
}
fputs("</heap>", fp);
}
size_t region_allocated;
struct region_allocator *ra = ro.region_allocator;
mutex_lock(&ra->lock);
region_allocated = ra->allocated;
mutex_unlock(&ra->lock);
fprintf(fp, "<heap nr=\"%u\">", N_ARENA);
fprintf(fp, "<allocated_large>%zu</allocated_large>", region_allocated);
fputs("</heap>", fp);
fputs("</malloc>", fp);
return 0;
#else
errno = ENOSYS;
return -1;
#endif
}
COLD EXPORT void *h_malloc_get_state(void) {

2
h_malloc.h
View File

@ -63,7 +63,7 @@ void h_malloc_stats(void);
#if defined(__GLIBC__) || defined(__ANDROID__)
struct mallinfo h_mallinfo(void);
#endif
#ifdef __GLIBC__
#ifndef __ANDROID__
int h_malloc_info(int options, FILE *fp);
#endif