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/*
* Copyright (C) 2019 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 <err.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <string>
#include "Alloc.h"
#include "Pointers.h"
#include "Utils.h"
void AllocGetData(const std::string& line, AllocEntry* entry) {
int line_pos = 0;
char name[128];
// All lines have this format:
// TID: ALLOCATION_TYPE POINTER
// where
// TID is the thread id of the thread doing the operation.
// ALLOCATION_TYPE is one of malloc, calloc, memalign, realloc, free, thread_done
// POINTER is the hex value of the actual pointer
if (sscanf(line.c_str(), "%d: %127s %" SCNx64 " %n", &entry->tid, name, &entry->ptr, &line_pos) !=
3) {
errx(1, "File Error: Failed to process %s", line.c_str());
}
const char* line_end = &line[line_pos];
std::string type(name);
if (type == "malloc") {
// Format:
// TID: malloc POINTER SIZE_OF_ALLOCATION
if (sscanf(line_end, "%zu", &entry->size) != 1) {
errx(1, "File Error: Failed to read malloc data %s", line.c_str());
}
entry->type = MALLOC;
} else if (type == "free") {
// Format:
// TID: free POINTER
entry->type = FREE;
} else if (type == "calloc") {
// Format:
// TID: calloc POINTER ITEM_COUNT ITEM_SIZE
if (sscanf(line_end, "%" SCNd64 " %zu", &entry->u.n_elements, &entry->size) != 2) {
errx(1, "File Error: Failed to read calloc data %s", line.c_str());
}
entry->type = CALLOC;
} else if (type == "realloc") {
// Format:
// TID: calloc POINTER NEW_SIZE OLD_POINTER
if (sscanf(line_end, "%" SCNx64 " %zu", &entry->u.old_ptr, &entry->size) != 2) {
errx(1, "File Error: Failed to read realloc data %s", line.c_str());
}
entry->type = REALLOC;
} else if (type == "memalign") {
// Format:
// TID: memalign POINTER ALIGNMENT SIZE
if (sscanf(line_end, "%" SCNd64 " %zu", &entry->u.align, &entry->size) != 2) {
errx(1, "File Error: Failed to read memalign data %s", line.c_str());
}
entry->type = MEMALIGN;
} else if (type == "thread_done") {
entry->type = THREAD_DONE;
} else {
errx(1, "File Error: Unknown type %s", type.c_str());
}
}
bool AllocDoesFree(const AllocEntry& entry) {
switch (entry.type) {
case MALLOC:
case CALLOC:
case MEMALIGN:
case THREAD_DONE:
return false;
case FREE:
return entry.ptr != 0;
case REALLOC:
return entry.u.old_ptr != 0;
}
}
static uint64_t MallocExecute(const AllocEntry& entry, Pointers* pointers) {
int pagesize = getpagesize();
uint64_t time_nsecs = Nanotime();
void* memory = malloc(entry.size);
MakeAllocationResident(memory, entry.size, pagesize);
time_nsecs = Nanotime() - time_nsecs;
pointers->Add(entry.ptr, memory);
return time_nsecs;
}
static uint64_t CallocExecute(const AllocEntry& entry, Pointers* pointers) {
int pagesize = getpagesize();
uint64_t time_nsecs = Nanotime();
void* memory = calloc(entry.u.n_elements, entry.size);
MakeAllocationResident(memory, entry.u.n_elements * entry.size, pagesize);
time_nsecs = Nanotime() - time_nsecs;
pointers->Add(entry.ptr, memory);
return time_nsecs;
}
static uint64_t ReallocExecute(const AllocEntry& entry, Pointers* pointers) {
void* old_memory = nullptr;
if (entry.u.old_ptr != 0) {
old_memory = pointers->Remove(entry.u.old_ptr);
}
int pagesize = getpagesize();
uint64_t time_nsecs = Nanotime();
void* memory = realloc(old_memory, entry.size);
MakeAllocationResident(memory, entry.size, pagesize);
time_nsecs = Nanotime() - time_nsecs;
pointers->Add(entry.ptr, memory);
return time_nsecs;
}
static uint64_t MemalignExecute(const AllocEntry& entry, Pointers* pointers) {
int pagesize = getpagesize();
uint64_t time_nsecs = Nanotime();
void* memory = memalign(entry.u.align, entry.size);
MakeAllocationResident(memory, entry.size, pagesize);
time_nsecs = Nanotime() - time_nsecs;
pointers->Add(entry.ptr, memory);
return time_nsecs;
}
static uint64_t FreeExecute(const AllocEntry& entry, Pointers* pointers) {
if (entry.ptr == 0) {
return 0;
}
void* memory = pointers->Remove(entry.ptr);
uint64_t time_nsecs = Nanotime();
free(memory);
return Nanotime() - time_nsecs;
}
uint64_t AllocExecute(const AllocEntry& entry, Pointers* pointers) {
switch (entry.type) {
case MALLOC:
return MallocExecute(entry, pointers);
case CALLOC:
return CallocExecute(entry, pointers);
case REALLOC:
return ReallocExecute(entry, pointers);
case MEMALIGN:
return MemalignExecute(entry, pointers);
case FREE:
return FreeExecute(entry, pointers);
default:
return 0;
}
}
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