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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "malloc_info.h"
#include <errno.h>
#include "private/bionic_macros.h"
class __LIBC_HIDDEN__ Elem {
public:
// name must be valid throughout lifetime of the object.
explicit Elem(FILE* fp, const char* name,
const char* attr_fmt = nullptr, ...) {
this->fp = fp;
this->name = name;
fprintf(fp, "<%s", name);
if (attr_fmt != nullptr) {
va_list args;
va_start(args, attr_fmt);
fputc(' ', fp);
vfprintf(fp, attr_fmt, args);
va_end(args);
}
fputc('>', fp);
}
~Elem() noexcept {
fprintf(fp, "</%s>", name);
}
void contents(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(fp, fmt, args);
va_end(args);
}
private:
FILE* fp;
const char* name;
DISALLOW_COPY_AND_ASSIGN(Elem);
};
int malloc_info(int options, FILE* fp) {
if (options != 0) {
errno = EINVAL;
return -1;
}
Elem root(fp, "malloc", "version=\"jemalloc-1\"");
// Dump all of the large allocations in the arenas.
for (size_t i = 0; i < __mallinfo_narenas(); i++) {
struct mallinfo mi = __mallinfo_arena_info(i);
if (mi.hblkhd != 0) {
Elem arena_elem(fp, "heap", "nr=\"%d\"", i);
{
Elem(fp, "allocated-large").contents("%zu", mi.ordblks);
Elem(fp, "allocated-huge").contents("%zu", mi.uordblks);
Elem(fp, "allocated-bins").contents("%zu", mi.fsmblks);
size_t total = 0;
for (size_t j = 0; j < __mallinfo_nbins(); j++) {
struct mallinfo mi = __mallinfo_bin_info(i, j);
if (mi.ordblks != 0) {
Elem bin_elem(fp, "bin", "nr=\"%d\"", j);
Elem(fp, "allocated").contents("%zu", mi.ordblks);
Elem(fp, "nmalloc").contents("%zu", mi.uordblks);
Elem(fp, "ndalloc").contents("%zu", mi.fordblks);
total += mi.ordblks;
}
}
Elem(fp, "bins-total").contents("%zu", total);
}
}
}
return 0;
}
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