forked from 0ad/0ad
. timer, config: fix definition of ALLOW_RDTSC . add movsx_be64 (for whirlpool), revise implementation, move to byte_order, add test . MAX -> std::max, remove those macros . add timestamp to system_info as requested by philip This was SVN commit r5050.
1423 lines
35 KiB
C++
1423 lines
35 KiB
C++
/**
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* =========================================================================
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* File : mmgr.cpp
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* Project : 0 A.D.
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* Description : memory manager and tracker.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#include "precompiled.h"
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AT_STARTUP(\
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error_setDescription(ERR::MEM_ALLOC_NOT_FOUND, "Not a valid allocated address");\
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error_setDescription(ERR::MEM_OVERWRITTEN, "Wrote to memory outside valid allocation");\
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)
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// for easy removal in release builds, so that we don't cause any overhead.
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// note that any application calls to our functions must be removed also,
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// but this is preferable to stubbing them out here ("least surprise").
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#if CONFIG_USE_MMGR
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#include "mmgr.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <stdarg.h>
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#include <new>
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#include "posix/posix.h"
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#include "debug.h"
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// remove macro hooks (we need to use the actual malloc/new etc. routines)
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#include "nommgr.h"
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//////////////////////////////////////////////////////////////////////////////
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// locking for thread safety
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//////////////////////////////////////////////////////////////////////////////
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static pthread_mutex_t mutex;
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// prevents using uninitialized lock before init (due to undefined
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// NLSO ctor call order) or after shutdown
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static bool lock_initialized;
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static void lock_init() throw()
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{
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if(pthread_mutex_init(&mutex, 0) == 0)
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lock_initialized = true;
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}
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static void lock_shutdown() throw()
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{
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WARN_ERR(pthread_mutex_destroy(&mutex));
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lock_initialized = false;
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}
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static void lock() throw()
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{
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if(lock_initialized)
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WARN_ERR(pthread_mutex_lock(&mutex));
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}
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static void unlock() throw()
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{
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if(lock_initialized)
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WARN_ERR(pthread_mutex_unlock(&mutex));
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}
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//////////////////////////////////////////////////////////////////////////////
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// options (enable/disable additional checks)
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//////////////////////////////////////////////////////////////////////////////
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// we can induce allocations to fail, for testing the application's
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// error handling. uncomment and set to percentage that should fail.
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// note: we use #define to make absolutely sure no
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// failures are induced unless desired.
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//#define RANDOM_FAILURE 10.0
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// note: padding size is in bytes, and is added before and after the
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// user's buffer. pattern_set assumes it's an integral number of ulongs.
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// enable all checks (slow!)
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#if CONFIG_PARANOIA
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static uint options = MMGR_ALL;
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static const size_t padding_size = 256 * sizeof(ulong);
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// normal settings
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#else
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static uint options = 0;
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static const size_t padding_size = 1 * sizeof(ulong);
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#endif
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uint mmgr_set_options(uint new_options)
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{
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lock();
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if(new_options != MMGR_QUERY)
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{
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debug_assert(!(new_options & ~MMGR_ALL) && "unrecognized options set");
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options = new_options;
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}
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uint ret = options;
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unlock();
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return ret;
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}
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//////////////////////////////////////////////////////////////////////////////
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// string formatting routines for log and reports
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//////////////////////////////////////////////////////////////////////////////
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const size_t NUM_SIZE = 32;
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// enough to cover even 64 bit numbers
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static const char* insert_commas(char* out, size_t value)
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{
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char num[NUM_SIZE];
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sprintf(num, "%u", value);
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const size_t num_len = strlen(num);
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debug_assert(num_len != 0); // messes up #comma calc below
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const size_t out_len = num_len + (num_len-1)/3;
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char* pos = out+out_len;
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*pos-- = '\0';
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uint digits = 0;
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for(int i = (int)num_len-1; i >= 0; i--)
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{
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*pos-- = num[i];
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if(++digits == 3 && i != 0)
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{
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*pos-- = ',';
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digits = 0;
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}
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}
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return out;
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}
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static const char* format_size_string(char* str, size_t value)
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{
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char num[NUM_SIZE];
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(void)insert_commas(num, value);
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if(value > GiB)
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sprintf(str, "%10s (%7.2fGi)", num, value / (float)GiB);
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else if(value > MiB)
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sprintf(str, "%10s (%7.2fMi)", num, value / (float)MiB);
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else if(value > KiB)
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sprintf(str, "%10s (%7.2fKi)", num, value / (float)KiB);
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else
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sprintf(str, "%10s bytes ", num);
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return str;
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}
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//////////////////////////////////////////////////////////////////////////////
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// allocator for Alloc objects
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//////////////////////////////////////////////////////////////////////////////
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enum AllocType
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{
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AT_UNKNOWN = 0,
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AT_MALLOC = 1,
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AT_CALLOC = 2,
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AT_REALLOC = 3,
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AT_FREE = 4,
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AT_NEW = 5,
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AT_NEW_ARRAY = 6,
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AT_DELETE = 7,
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AT_DELETE_ARRAY = 8,
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AT_INVALID = 9
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};
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// must match enum AllocType!
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static const char* types[] =
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{
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"unknown",
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"malloc",
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"calloc",
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"realloc",
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"free",
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"new",
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"new[]",
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"delete",
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"delete[]",
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};
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struct Alloc
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{
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void* p;
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size_t size;
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uint num;
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Alloc* next;
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Alloc* prev;
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const char* owner;
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uint type : 4;
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uint break_on_free : 1;
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uint break_on_realloc : 1;
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void* user_p() const
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{
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return (char*)p + padding_size;
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}
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size_t user_size() const
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{
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return size - padding_size*2;
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}
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};
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static Alloc* freelist;
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static Alloc** reservoirs = 0; // array of pointers to runs of 256 Allocs
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static size_t num_reservoirs = 0; // # entries
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static Alloc* alloc_new()
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{
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// If necessary, grow the freelist of unused Allocs
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if(!freelist)
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{
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freelist = (Alloc*)calloc(256, sizeof(Alloc));
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if(!freelist)
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{
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DEBUG_WARN_ERR(ERR::NO_MEM);
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return 0;
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}
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for(uint i = 0; i < 256 - 1; i++)
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freelist[i].next = &freelist[i+1];
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const size_t bytes = (num_reservoirs + 1) * sizeof(Alloc*);
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Alloc* *temp = (Alloc* *) realloc(reservoirs, bytes);
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debug_assert(temp);
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if(temp)
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{
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reservoirs = temp;
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reservoirs[num_reservoirs++] = freelist;
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}
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}
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// Grab a new Alloc from the front of the freelist
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Alloc* a = freelist;
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freelist = a->next;
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return a;
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}
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static void alloc_delete(Alloc* a)
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{
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memset(a, 0, sizeof(Alloc));
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// add to the front of our freelist of unused Allocs
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a->next = freelist;
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freelist = a;
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}
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static void alloc_shutdown()
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{
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if(reservoirs)
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{
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for(uint i = 0; i < num_reservoirs; i++)
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free(reservoirs[i]);
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free(reservoirs);
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reservoirs = 0;
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num_reservoirs = 0;
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freelist = 0;
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// user allocation pointer -> Alloc lookup data structure
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//////////////////////////////////////////////////////////////////////////////
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// rationale:
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// - split into separate routines (as opposed to exposing details to
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// user code) for easier modification.
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// - may as well have used STL hash_map, but it's non-standard
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// thus far, and we have a hand-rolled container already.
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static const size_t hash_entries = (1u << 11)+1;
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// ~8kb memory used; prime for better distribution
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static Alloc* hash_table[hash_entries];
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// return pointer to list of all Allocs with the same pointer hash.
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static Alloc*& hash_chain(const void* pointer)
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{
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uintptr_t address = reinterpret_cast<uintptr_t>(pointer);
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size_t index = ((size_t)address >> 4) % hash_entries;
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// many allocations are 16-byte aligned, so shift off lower 4 bits
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// (=> better hash distribution)
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return hash_table[index];
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}
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static void allocs_remove(const Alloc* a)
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{
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Alloc*& chain = hash_chain(a->user_p());
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// it was at head of chain
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if(chain == a)
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chain = a->next;
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// in middle of chain
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else
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{
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if(a->prev)
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a->prev->next = a->next;
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if(a->next)
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a->next->prev = a->prev;
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}
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}
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static void allocs_add(Alloc* a)
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{
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Alloc*& chain = hash_chain(a->user_p());
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if(chain)
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chain->prev = a;
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a->next = chain;
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a->prev = 0;
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chain = a;
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}
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static Alloc* allocs_find(const void* user_p)
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{
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if(!user_p)
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debug_assert(user_p);
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Alloc* a = hash_chain(user_p);
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while(a)
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{
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if(a->user_p() == user_p)
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break;
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a = a->next;
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}
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return a;
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}
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static void allocs_foreach(void (*cb)(const Alloc*, void*), void* arg)
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{
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for(uint i = 0; i < hash_entries; i++)
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{
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const Alloc* a = hash_table[i];
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while(a)
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{
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cb(a, arg);
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a = a->next;
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// padding: make sure the user hasn't over/underrun their buffer.
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//////////////////////////////////////////////////////////////////////////////
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static const ulong pattern_before = 0xbaadf00d;
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static const ulong pattern_after = 0xdeadc0de;
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static const ulong pattern_unused = 0xfeedface;
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static const ulong pattern_freed = 0xdeadbeef;
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static void pattern_set(const Alloc* a, ulong pattern)
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{
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// fill user's data (optional)
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// note: don't use memset, because we want multi-byte patterns
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if(options & MMGR_FILL && a->user_size() > 0)
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{
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u8* p = (u8*)a->user_p();
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const size_t size = a->user_size();
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// write whole ulongs
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for(size_t i = 0; i < size / sizeof(ulong); i++)
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{
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*(ulong*)p = pattern;
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p += sizeof(ulong);
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}
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// remainder
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for(size_t shift = 0; shift < (size % sizeof(ulong)) * 8; shift += 8)
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*p++ = (u8)((pattern >> shift) & 0xff);
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}
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// fill prefix/postfix bytes (note: integral number of ulongs)
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ulong* pre = (ulong*)a->p;
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ulong* post = (ulong*)( (char*)a->p + a->size - padding_size );
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for(uint i = 0; i < padding_size / sizeof(ulong); i++)
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{
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*pre++ = pattern_before;
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*post++ = pattern_after;
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// note: doesn't need to be split into 2 loops; cache is A2
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}
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}
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static bool padding_is_intact(const Alloc* a, ulong **corrupt_address)
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{
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*corrupt_address=NULL;
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ulong* pre = (ulong*)a->p;
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ulong* post = (ulong*)( (char*)a->p + a->size - padding_size );
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for(uint i = 0; i < padding_size / sizeof(ulong); i++)
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{
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if(pre[i] != pattern_before)
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{
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*corrupt_address=&pre[i];
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return false;
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}
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else if (post[i] != pattern_after)
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{
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*corrupt_address=&post[i];
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return false;
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}
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}
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return true;
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}
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static inline size_t calc_actual_size(const size_t user_size)
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{
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return user_size + padding_size*2u;
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}
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static inline void* calc_user_p(const void* actual_p)
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{
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if(!actual_p)
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return 0;
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return (char*)actual_p + padding_size;
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}
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//////////////////////////////////////////////////////////////////////////////
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// unused memory reporting
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//////////////////////////////////////////////////////////////////////////////
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// return byte size of all the ulongs in the allocation whose contents
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// haven't changed from the "unused" pattern since allocation.
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// called from calc_all_unused_cb and log_this_alloc.
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static size_t calc_unused(const Alloc* a)
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{
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size_t total = 0;
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const ulong* p = (const ulong*)a->user_p();
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for(uint i = 0; i < a->user_size(); i += sizeof(ulong))
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if(*p++ == pattern_unused)
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total += sizeof(long);
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return total;
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}
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static void calc_all_unused_cb(const Alloc* a, void* arg)
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{
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size_t* ptotal = (size_t*)arg;
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*ptotal += calc_unused(a);
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}
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// return total unused size in all allocations.
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static size_t calc_all_unused()
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{
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size_t total = 0;
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allocs_foreach(calc_all_unused_cb, &total);
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return total;
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}
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//////////////////////////////////////////////////////////////////////////////
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// statistics: track current, cumulative, and peak allocations
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//////////////////////////////////////////////////////////////////////////////
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static struct Stats
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{
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size_t cur_user_mem;
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size_t peak_user_mem;
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size_t total_user_mem;
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size_t cur_mem;
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size_t peak_mem;
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size_t total_mem;
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size_t cur_allocs;
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size_t peak_allocs;
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size_t total_allocs;
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} stats;
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// note: also called when reallocating. cumulative # allocations
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// will increase, but that makes sense.
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static void stats_add(const Alloc* a)
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{
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const size_t size = a->size;
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const size_t user_size = a->user_size();
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stats.cur_user_mem += user_size;
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stats.cur_mem += size;
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stats.cur_allocs++;
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stats.total_user_mem += user_size;
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stats.total_mem += size;
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stats.total_allocs++;
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stats.peak_user_mem = std::max(stats.peak_user_mem, stats.cur_user_mem);
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stats.peak_mem = std::max(stats.peak_mem, stats.cur_mem);
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stats.peak_allocs = std::max(stats.peak_allocs, stats.cur_allocs);
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}
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static void stats_remove(const Alloc* a)
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{
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const size_t size = a->size;
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const size_t user_size = a->user_size();
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stats.cur_user_mem -= user_size;
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stats.cur_mem -= size;
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stats.cur_allocs--;
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}
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//////////////////////////////////////////////////////////////////////////////
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// logging to file
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//////////////////////////////////////////////////////////////////////////////
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static void log_init();
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static const char* const log_filename = "mem_log.txt";
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static FILE* log_fp;
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// open/append/close every call to make sure nothing gets lost when crashing.
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// split out of log() to allow locked_log without code duplication.
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static void vlog(const char* fmt, va_list args)
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{
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log_init();
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(void)vfprintf(log_fp, fmt, args);
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// user requested each log line go directly to disk.
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if(options & MMGR_FLUSH_LOG)
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fflush(log_fp);
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}
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static void log(const char* fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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vlog(fmt, args);
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va_end(args);
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}
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// convenience function for overloaded new/delete that generate warnings
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static void locked_log(const char* fmt, ...)
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{
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lock();
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va_list args;
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va_start(args, fmt);
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vlog(fmt, args);
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va_end(args);
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unlock();
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}
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static void log_init()
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{
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// open => we're already initialized.
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if(log_fp)
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return;
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log_fp = fopen(log_filename, "w");
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if(!log_fp)
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{
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debug_assert(0 && "log file open failed");
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return;
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}
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//
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// write header
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//
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// get current time as string.
|
|
// doesn't need to be reentrant, but we need to use strftime
|
|
// elsewhere, so stick with it for consistency.
|
|
char time_str[100];
|
|
time_t t = time(0);
|
|
const struct tm* tm_ = localtime(&t);
|
|
(void)strftime(time_str, sizeof(time_str), "%#c", tm_);
|
|
|
|
log("Memory manager log, started on %s.\n", time_str);
|
|
log("\n");
|
|
log("Logs errors, operations, and mmgr calls, depending on settings.\n");
|
|
log("Entry types:\n");
|
|
log("\n");
|
|
log(" [!] - Error\n");
|
|
log(" [?] - Warning\n");
|
|
log(" [+] - Allocation\n");
|
|
log(" [~] - Reallocation\n");
|
|
log(" [-] - Deallocation\n");
|
|
log(" [I] - Information\n");
|
|
log(" [F] - Induced random failure to test the app's error handling\n");
|
|
log(" [D] - Debug information for debugging mmgr\n");
|
|
log("\n");
|
|
log("Problematic allocations can be tracked by address+owner or number.\n");
|
|
log("\n");
|
|
}
|
|
|
|
|
|
static void log_shutdown()
|
|
{
|
|
if(log_fp)
|
|
{
|
|
fclose(log_fp);
|
|
log_fp = 0;
|
|
}
|
|
}
|
|
|
|
|
|
static void log_this_alloc(const Alloc* a)
|
|
{
|
|
// duplicated in write_alloc_cb(); factoring out isn't worth it
|
|
log("%06d 0x%08p 0x%08X 0x%08p 0x%08X 0x%08X %-8s %c %c %s\n",
|
|
a->num,
|
|
a->user_p(), a->user_size(),
|
|
a->p, a->size,
|
|
calc_unused(a),
|
|
types[a->type],
|
|
a->break_on_free ? 'Y':'N',
|
|
a->break_on_realloc ? 'Y':'N',
|
|
a->owner
|
|
);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// write report text files (leaks, statistics)
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static void write_alloc_cb(const Alloc* a, void* arg)
|
|
{
|
|
FILE* f = (FILE*)arg;
|
|
|
|
// duplicated in log_this_alloc(Alloc*); factoring out isn't worth it
|
|
fprintf(f, "%06d 0x%08p 0x%08X 0x%08p 0x%08X 0x%08X %-8s %c %c %s\n",
|
|
a->num,
|
|
a->user_p(), a->user_size(),
|
|
a->p, a->size,
|
|
calc_unused(a),
|
|
types[a->type],
|
|
a->break_on_free ? 'Y':'N',
|
|
a->break_on_realloc ? 'Y':'N',
|
|
a->owner
|
|
);
|
|
}
|
|
|
|
static void write_all_allocs(FILE* f)
|
|
{
|
|
fprintf(f, "Alloc. Addr Size Addr Size BreakOn BreakOn \n");
|
|
fprintf(f, "Number Reported Reported Actual Actual Unused Method Dealloc Realloc Allocated by \n");
|
|
fprintf(f, "------ ---------- ---------- ---------- ---------- ---------- -------- ------- ------- --------------------------------------------------- \n");
|
|
|
|
allocs_foreach(write_alloc_cb, f);
|
|
}
|
|
|
|
|
|
void mmgr_write_report(void)
|
|
{
|
|
FILE* f = fopen("mem_report.txt", "w");
|
|
if(!f)
|
|
{
|
|
debug_assert(0 && "open of memory report file failed");
|
|
return;
|
|
}
|
|
|
|
// get current time as string
|
|
// (needs to be reentrant, so don't use asctime et al)
|
|
char time_str[100];
|
|
time_t t = time(0);
|
|
const struct tm* tm_ = localtime(&t);
|
|
(void)strftime(time_str, sizeof(time_str), "%#c", tm_);
|
|
|
|
fprintf(f, "Detailed memory report:\n");
|
|
fprintf(f, "Built %s %s; test run ended on %s\n", __DATE__, __TIME__, time_str);
|
|
fprintf(f, "\n");
|
|
|
|
char num[NUM_SIZE];
|
|
char size[99]; // more than enough
|
|
|
|
fprintf(f, "Unused:\n");
|
|
fprintf(f, "-------\n");
|
|
fprintf(f, "Memory allocated but not in use: %s\n", format_size_string(size, calc_all_unused()));
|
|
fprintf(f, "\n");
|
|
|
|
fprintf(f, "Peaks:\n");
|
|
fprintf(f, "------\n");
|
|
fprintf(f, " Allocation unit count: %10s\n", insert_commas(num, stats.peak_allocs));
|
|
fprintf(f, " Reported to application: %s\n", format_size_string(size, stats.peak_user_mem));
|
|
fprintf(f, " Actual: %s\n", format_size_string(size, stats.peak_mem));
|
|
fprintf(f, " Memory tracking overhead: %s\n", format_size_string(size, stats.peak_mem - stats.peak_user_mem));
|
|
fprintf(f, "\n");
|
|
|
|
fprintf(f, "Totals:\n");
|
|
fprintf(f, "-------\n");
|
|
fprintf(f, " Allocation unit count: %10s\n", insert_commas(num, stats.total_allocs));
|
|
fprintf(f, " Reported to application: %s\n", format_size_string(size, stats.total_user_mem));
|
|
fprintf(f, " Actual: %s\n", format_size_string(size, stats.total_mem));
|
|
fprintf(f, " Memory tracking overhead: %s\n", format_size_string(size, stats.total_mem - stats.total_user_mem));
|
|
fprintf(f, "\n");
|
|
|
|
fprintf(f, "Current:\n");
|
|
fprintf(f, "--------\n");
|
|
fprintf(f, " Allocation count: %10s\n", insert_commas(num, stats.cur_allocs));
|
|
fprintf(f, " Reported to application: %s\n", format_size_string(size, stats.cur_user_mem));
|
|
fprintf(f, " Actual: %s\n", format_size_string(size, stats.cur_mem));
|
|
fprintf(f, " Memory tracking overhead: %s\n", format_size_string(size, stats.cur_mem - stats.cur_user_mem));
|
|
fprintf(f, "\n");
|
|
|
|
write_all_allocs(f);
|
|
|
|
fclose(f);
|
|
}
|
|
|
|
// only generate leak report at exit if the app has called
|
|
// mmgr_write_leak_report, since it's slow.
|
|
static bool app_wants_leak_report = false;
|
|
|
|
// separate from the main report - this is updated on every deallocate
|
|
// call when exiting, because each call may be the last
|
|
// (we can't say "everything after app shutdown is a leak", because
|
|
// it's common, albeit bad practice, for NLSOs to allocate memory).
|
|
void mmgr_write_leak_report(void)
|
|
{
|
|
app_wants_leak_report = true;
|
|
|
|
FILE* f = fopen("mem_leaks.txt", "w");
|
|
if(!f)
|
|
{
|
|
debug_assert(0 && "open of memory leak report file failed");
|
|
return;
|
|
}
|
|
|
|
// get current time as string
|
|
// (needs to be reentrant, so don't use asctime et al)
|
|
char time_str[100];
|
|
time_t t = time(0);
|
|
const struct tm* tm_ = localtime(&t);
|
|
(void)strftime(time_str, sizeof(time_str), "%#c", tm_);
|
|
|
|
fprintf(f, "Memory leak report:\n");
|
|
fprintf(f, "Built %s %s; test run ended on %s\n", __DATE__, __TIME__, time_str);
|
|
fprintf(f, "\n");
|
|
|
|
const size_t num_leaks = stats.cur_allocs;
|
|
if(num_leaks)
|
|
{
|
|
fprintf(f, "%d memory leak%s found:\n", num_leaks, num_leaks == 1 ? "":"s");
|
|
fprintf(f, "\n");
|
|
write_all_allocs(f);
|
|
}
|
|
else
|
|
fprintf(f, "No leaks found! Congratulations!\n");
|
|
|
|
fclose(f);
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// user-callable integrity checks
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static bool alloc_is_valid(const Alloc *a);
|
|
|
|
bool mmgr_is_valid_ptr(const void* p)
|
|
{
|
|
// null pointer - won't even try ;-)
|
|
if (p == NULL)
|
|
return false;
|
|
lock();
|
|
Alloc *a=allocs_find(p);
|
|
bool found = a != NULL && alloc_is_valid(a);
|
|
unlock();
|
|
return found;
|
|
}
|
|
|
|
|
|
static bool alloc_is_valid(const Alloc* a)
|
|
{
|
|
// catch(...) is really evil in that it stops serious and unexpected
|
|
// exceptions (e.g. "hardware is on fire") from getting through, but
|
|
// there's really no alternative, since padding_is_intact is very
|
|
// likely to crash if the Alloc is corrupted.
|
|
// TODO Linux doesn't treat e.g. SIGSEGV as an exception (crashes instead)
|
|
// Research linux/unix/gcc alternative for catching those (signal handler
|
|
// and set/longjmp?)
|
|
bool intact;
|
|
ulong *p=NULL; // The corrupted address
|
|
try
|
|
{
|
|
intact = padding_is_intact(a, &p);
|
|
}
|
|
catch(...)
|
|
{
|
|
intact = false;
|
|
}
|
|
|
|
// this allocation has been over/underrun (i.e. modified outside the
|
|
// allocation's memory range) or is otherwise corrupt.
|
|
if(!intact)
|
|
{
|
|
// if p is between a->p and a->p+padding_size, accuse a and the alloc
|
|
// before a, if p is between a->p+a->size-padding_size and a->p+a->size,
|
|
// accuse a and the alloc after a
|
|
// TODO This doesn't really find out the next/previous alloc area, just
|
|
// prints the address, which end was currupted, and the data found
|
|
if (p)
|
|
{
|
|
u8 *user_p = (u8 *)a->user_p();
|
|
u8 *user_p_end = ((u8*)a->user_p()) + a->user_size();
|
|
ulong expected=0;
|
|
if ((u8*)p < user_p)
|
|
{
|
|
log("[!] Memory underrun: padding currupt at offset %d (bytes)\n",
|
|
((u8 *)p)-user_p);
|
|
expected=pattern_before;
|
|
}
|
|
else
|
|
{
|
|
log("[!] Memory overrun: padding currupt at %d bytes past end of buffer\n",
|
|
((u8 *)p)-user_p_end);
|
|
expected=pattern_after;
|
|
}
|
|
log("[!] Memory over/underrun: expected padding %08x, found garbage %08x\n", expected, *p);
|
|
}
|
|
else
|
|
log("[!] alloc_is_valid encountered an exception - something may be very wrong!\n");
|
|
log_this_alloc(a);
|
|
DEBUG_WARN_ERR(ERR::MEM_OVERWRITTEN);
|
|
}
|
|
return intact;
|
|
}
|
|
|
|
struct ValidateAllParams
|
|
{
|
|
uint num_invalid;
|
|
uint num_allocs;
|
|
};
|
|
|
|
static void validate_all_cb(const Alloc* a, void* arg)
|
|
{
|
|
ValidateAllParams* p = (ValidateAllParams*)arg;
|
|
p->num_allocs++;
|
|
if(!alloc_is_valid(a))
|
|
p->num_invalid++;
|
|
}
|
|
|
|
// provide separate lock-is-held version to prevent recursive locks.
|
|
// called from mmgr_alloc/realloc/free; return true if all are valid.
|
|
static bool validate_all()
|
|
{
|
|
ValidateAllParams params = { 0, 0 };
|
|
allocs_foreach(validate_all_cb, ¶ms);
|
|
|
|
// Test for hash-table correctness
|
|
if(params.num_allocs != stats.cur_allocs)
|
|
{
|
|
// our internal pointer->Alloc lookup data structure is inconsistent!
|
|
// enable MMGR_VALIDATE_ALL, trigger this condition again,
|
|
// and check the log for the last successful operation. the problem
|
|
// will have occurred between then and now.
|
|
DEBUG_WARN_ERR(ERR::CORRUPTED);
|
|
log("[!] Memory tracking hash table corrupt!\n");
|
|
}
|
|
|
|
if(params.num_invalid)
|
|
{
|
|
DEBUG_WARN_ERR(ERR::MEM_OVERWRITTEN);
|
|
log("[!] %d allocations are corrupt\n", params.num_invalid);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool mmgr_are_all_valid()
|
|
{
|
|
lock();
|
|
// do our check first, because it fails more cleanly
|
|
// (=> better chance to see where it happened in the debugger)
|
|
bool all_valid = validate_all();
|
|
debug_heap_check();
|
|
unlock();
|
|
return all_valid;
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// init/shutdown hook - notifies us when ctor/dtor are called
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static bool static_dtor_called = false;
|
|
|
|
static struct NonLocalStaticObject
|
|
{
|
|
NonLocalStaticObject()
|
|
{
|
|
// by calling now instead of on first lock() call,
|
|
// we ensure no threads have been spawned yet.
|
|
lock_init();
|
|
|
|
// note: don't init log here - current directory hasn't yet been set.
|
|
// the log file may otherwise be split between 2 files.
|
|
}
|
|
~NonLocalStaticObject()
|
|
{
|
|
// if the app requested a leak report before now, the deallocator
|
|
// will update its leak report on every call (since dtors are now
|
|
// being called, each may be the last). note that there is no
|
|
// portable way to make sure a mmgr_shutdown() would be called
|
|
// as the very last thing before exit.
|
|
static_dtor_called = true;
|
|
|
|
// don't shutdown the lock - some threads may still be active.
|
|
// do so in shutdown() - see call site.
|
|
}
|
|
} nlso;
|
|
|
|
|
|
static void shutdown(void)
|
|
{
|
|
alloc_shutdown();
|
|
log_shutdown();
|
|
lock_shutdown();
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// trigger breakpoint when accessing specified allocations
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static uint cur_alloc_count = 0;
|
|
static uint break_on_count = 0;
|
|
|
|
|
|
void mmgr_break_on_alloc(uint count)
|
|
{
|
|
lock();
|
|
|
|
break_on_count = count;
|
|
|
|
unlock();
|
|
}
|
|
|
|
|
|
void mmgr_break_on_realloc(const void* p)
|
|
{
|
|
lock();
|
|
|
|
Alloc* a = allocs_find(p);
|
|
if(!a)
|
|
{
|
|
debug_assert(0 && "setting realloc breakpoint on invalid pointer");
|
|
return;
|
|
}
|
|
|
|
// setting realloc breakpoint on an allocation that
|
|
// doesn't support realloc.
|
|
debug_assert(a->type == AT_MALLOC || a->type == AT_CALLOC ||
|
|
a->type == AT_REALLOC);
|
|
|
|
a->break_on_realloc = true;
|
|
|
|
unlock();
|
|
}
|
|
|
|
|
|
void mmgr_break_on_free(const void* p)
|
|
{
|
|
lock();
|
|
|
|
Alloc* a = allocs_find(p);
|
|
if(!a)
|
|
{
|
|
debug_assert(0 && "setting free breakpoint on invalid pointer");
|
|
return;
|
|
}
|
|
|
|
a->break_on_free = true;
|
|
|
|
unlock();
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// actual allocator, making use of all of the above :)
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void* alloc_dbg(size_t user_size, AllocType type, const char* file, int line, const char* func, uint stack_frames)
|
|
{
|
|
void* ret = 0;
|
|
|
|
lock();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] ENTER: alloc_dbg\n");
|
|
|
|
void* caller = debug_get_nth_caller(1+stack_frames, 0);
|
|
const char* caller_string = debug_get_symbol_string(caller, func, file, line);
|
|
|
|
if(options & MMGR_LOG_ALL)
|
|
log("[+] %05d %8s of size 0x%08X(%08d) by %s\n", cur_alloc_count, types[type], user_size, user_size, caller_string);
|
|
|
|
// caller's source file didn't include "mmgr.h"
|
|
debug_assert(type != AT_UNKNOWN);
|
|
|
|
// you requested a breakpoint on this allocation number
|
|
++cur_alloc_count;
|
|
debug_assert(cur_alloc_count != break_on_count);
|
|
|
|
// simulate random failures
|
|
#ifdef RANDOM_FAILURE
|
|
{
|
|
double a = rand();
|
|
double b = RAND_MAX / 100.0 * RANDOM_FAILURE;
|
|
if(a < b)
|
|
{
|
|
log("[F] Random induced failure\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
const size_t size = calc_actual_size(user_size);
|
|
void* p = malloc(size);
|
|
if(!p)
|
|
{
|
|
DEBUG_WARN_ERR(ERR::NO_MEM);
|
|
log("[!] Allocation failed (out of memory)\n");
|
|
goto fail;
|
|
}
|
|
|
|
{
|
|
Alloc* a = alloc_new();
|
|
if(!a)
|
|
goto fail;
|
|
a->p = p;
|
|
a->size = size;
|
|
a->num = cur_alloc_count;
|
|
a->owner = caller_string;
|
|
a->type = type;
|
|
a->break_on_free = a->break_on_realloc = 0;
|
|
|
|
allocs_add(a);
|
|
stats_add(a);
|
|
|
|
pattern_set(a, pattern_unused);
|
|
|
|
// calloc() must zero the memory
|
|
if(type == AT_CALLOC)
|
|
memset(a->user_p(), 0, a->user_size());
|
|
|
|
if(options & MMGR_LOG_ALL)
|
|
log("[+] ----> addr 0x%08p\n", a->user_p());
|
|
|
|
ret = a->user_p();
|
|
}
|
|
fail:
|
|
if(options & MMGR_VALIDATE_ALL)
|
|
(void)validate_all();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] EXIT : alloc_dbg\n");
|
|
|
|
unlock();
|
|
return ret;
|
|
}
|
|
|
|
|
|
void free_dbg(const void* user_p, AllocType type, const char* file, int line, const char* func, uint stack_frames)
|
|
{
|
|
lock();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] ENTER: free_dbg\n");
|
|
|
|
void* caller = debug_get_nth_caller(1+stack_frames, 0);
|
|
const char* caller_string = debug_get_symbol_string(caller, func, file, line);
|
|
|
|
if(options & MMGR_LOG_ALL)
|
|
log("[-] ----- %8s of addr 0x%08p by %s\n", types[type], user_p, caller_string);
|
|
|
|
// freeing a zero pointer is allowed by C and C++, and a no-op.
|
|
if(!user_p)
|
|
goto done;
|
|
|
|
|
|
//
|
|
// security checks
|
|
//
|
|
{
|
|
Alloc* a = allocs_find(user_p);
|
|
if(!a)
|
|
{
|
|
log("[!] mmgr_free: not allocated by this memory manager\n");
|
|
DEBUG_WARN_ERR(ERR::MEM_ALLOC_NOT_FOUND);
|
|
goto fail;
|
|
}
|
|
// .. overrun? (note: alloc_is_valid already asserts if invalid)
|
|
alloc_is_valid(a);
|
|
// .. the owner wasn't compiled with mmgr.h
|
|
debug_assert(type != AT_UNKNOWN);
|
|
// .. allocator / deallocator type mismatch
|
|
debug_assert(
|
|
(type == AT_DELETE && a->type == AT_NEW ) ||
|
|
(type == AT_DELETE_ARRAY && a->type == AT_NEW_ARRAY) ||
|
|
(type == AT_FREE && a->type == AT_MALLOC ) ||
|
|
(type == AT_FREE && a->type == AT_CALLOC ) ||
|
|
(type == AT_FREE && a->type == AT_REALLOC )
|
|
);
|
|
// .. you requested a breakpoint when freeing this allocation
|
|
debug_assert(!a->break_on_free);
|
|
|
|
|
|
// "poison" the allocation's memory, to catch use-after-free bugs.
|
|
// the VC7 debug heap does this also (in free), so we're wasting time
|
|
// in that case. oh well, better to be safe/consistent.
|
|
pattern_set(a, pattern_freed);
|
|
|
|
free(a->p);
|
|
|
|
allocs_remove(a);
|
|
alloc_delete(a);
|
|
stats_remove(a);
|
|
}
|
|
|
|
// we're being called from destructors. each call may be the last.
|
|
if(static_dtor_called)
|
|
{
|
|
// update leak report (write a new one)
|
|
if(app_wants_leak_report)
|
|
mmgr_write_leak_report();
|
|
|
|
// all allocations have been freed. there's no better time to shut
|
|
// down, so do so now. (there's no portable way to call this as
|
|
// the very last thing before exit)
|
|
if(stats.cur_allocs == 0)
|
|
shutdown();
|
|
}
|
|
|
|
done:
|
|
fail:
|
|
if(options & MMGR_VALIDATE_ALL)
|
|
(void)validate_all();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] EXIT : free_dbg\n");
|
|
|
|
unlock();
|
|
}
|
|
|
|
|
|
void* realloc_dbg(const void* user_p, size_t user_size, AllocType type, const char* file, int line, const char* func, uint stack_frames)
|
|
{
|
|
void* ret = 0;
|
|
size_t old_size = 0;
|
|
|
|
debug_assert(type == AT_REALLOC);
|
|
|
|
lock();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] ENTER: realloc_dbg\n");
|
|
|
|
|
|
//
|
|
// security checks
|
|
//
|
|
|
|
if(user_p)
|
|
{
|
|
Alloc* a = allocs_find(user_p);
|
|
if(!a)
|
|
{
|
|
// you called realloc for a pointer mmgr didn't allocate
|
|
log("[!] realloc: wasn't previously allocated\n");
|
|
DEBUG_WARN_ERR(ERR::MEM_ALLOC_NOT_FOUND);
|
|
goto fail;
|
|
}
|
|
// .. the owner wasn't compiled with mmgr.h
|
|
debug_assert(a->type != AT_UNKNOWN);
|
|
// .. realloc for an allocation type that doesn't support it.
|
|
debug_assert(a->type == AT_MALLOC || a->type == AT_CALLOC ||
|
|
a->type == AT_REALLOC);
|
|
// .. you requested a breakpoint when reallocating this allocation
|
|
// (it will continue to be triggered unless you clear a->break_on_realloc)
|
|
debug_assert(!a->break_on_realloc);
|
|
|
|
old_size = a->size;
|
|
}
|
|
// else: skip security checks; realloc(0, size) is equivalent to malloc
|
|
|
|
unlock(); // avoid recursive lock
|
|
|
|
if(user_size)
|
|
ret = alloc_dbg(user_size, type, file,line,func, stack_frames+1);
|
|
|
|
// old_size should only be non-zero if the Alloc security checks all passed
|
|
// If the old buffer was actually zero bytes large, do nothing :P
|
|
if (old_size && ret)
|
|
cpu_memcpy(ret, user_p, std::min(old_size, user_size));
|
|
|
|
if(user_p)
|
|
free_dbg(user_p, AT_FREE, file,line,func, stack_frames+1);
|
|
|
|
lock();
|
|
|
|
if(options & MMGR_LOG_ALL)
|
|
{
|
|
log("[~] ----> from 0x%08X(%08d)\n", user_size, user_size);
|
|
log("[~] ----> addr 0x%08p\n", ret);
|
|
}
|
|
|
|
fail:
|
|
if(options & MMGR_VALIDATE_ALL)
|
|
(void)validate_all();
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] EXIT : realloc_dbg\n");
|
|
|
|
unlock();
|
|
return ret;
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// wrappers
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void* mmgr_malloc_dbg(size_t size, const char* file, int line, const char* func)
|
|
{
|
|
return alloc_dbg(size, AT_MALLOC, file,line,func, 1);
|
|
}
|
|
void* mmgr_calloc_dbg(size_t num, size_t size, const char* file, int line, const char* func)
|
|
{
|
|
return alloc_dbg(num*size, AT_CALLOC, file,line,func, 1);
|
|
}
|
|
void* mmgr_realloc_dbg(void* p, size_t size, const char* file, int line, const char* func)
|
|
{
|
|
return realloc_dbg(p, size, AT_REALLOC, file,line,func, 1);
|
|
}
|
|
void mmgr_free_dbg(void* p, const char* file, int line, const char* func)
|
|
{
|
|
return free_dbg(p, AT_FREE, file,line,func, 1);
|
|
}
|
|
|
|
|
|
//
|
|
// note: we can call mmgr_malloc_dbg because the macro hook has set
|
|
// file+line+func, so the stack trace info won't be used and frames-to-skip
|
|
// is irrelevant.
|
|
//
|
|
|
|
char* mmgr_strdup_dbg(const char* s, const char* file, int line, const char* func)
|
|
{
|
|
const size_t size = strlen(s)+1;
|
|
char* copy = (char*)mmgr_malloc_dbg(size, file,line,func);
|
|
if(!copy)
|
|
return 0;
|
|
strcpy(copy, s); // safe
|
|
return copy;
|
|
}
|
|
|
|
wchar_t* mmgr_wcsdup_dbg(const wchar_t* s, const char* file, int line, const char* func)
|
|
{
|
|
const size_t size = (wcslen(s) + 1) * sizeof(wchar_t);
|
|
wchar_t* copy = (wchar_t*)mmgr_malloc_dbg(size, file,line,func);
|
|
if(!copy)
|
|
return 0;
|
|
wcscpy(copy, s);
|
|
return copy;
|
|
}
|
|
|
|
|
|
//
|
|
// wrappers for more complicated functions that allocate memory.
|
|
// instead of reimplementing them entirely, we just make sure the memory
|
|
// returned here was allocated from our functions, so the user can call
|
|
// the hooked free().
|
|
//
|
|
|
|
char* mmgr_getcwd_dbg(char* buf, size_t buf_size, const char* file, int line, const char* func)
|
|
{
|
|
char* ret = getcwd(buf, buf_size);
|
|
// user already had a buffer or CRT version failed - pass on return value.
|
|
if(buf || !ret)
|
|
return ret;
|
|
char* copy = mmgr_strdup_dbg(ret, file,line,func);
|
|
free(ret);
|
|
return copy;
|
|
}
|
|
|
|
|
|
//
|
|
// note: separate versions for new/new[], and the VC debug new(file, line).
|
|
//
|
|
|
|
static void* new_common(size_t size, AllocType type,
|
|
const char* file, int line, const char* func)
|
|
{
|
|
const char* allocator = types[type];
|
|
|
|
if(options & MMGR_TRACE)
|
|
log("[D] ENTER: %s\n", allocator);
|
|
|
|
// C++ requires size==0 to return a unique address, so allocate 1 byte.
|
|
if(size == 0)
|
|
size = 1;
|
|
|
|
// loop because C++ says error handler may free up some memory.
|
|
for(;;)
|
|
{
|
|
void* p = alloc_dbg(size, type, file,line,func, 2);
|
|
if(p)
|
|
{
|
|
if(options & MMGR_TRACE)
|
|
log("[D] EXIT : %s\n", allocator);
|
|
|
|
return p;
|
|
}
|
|
|
|
// is a handler set?
|
|
std::new_handler nh = std::set_new_handler(0);
|
|
(void)std::set_new_handler(nh);
|
|
// .. yes: call, and loop again (hoping it freed up memory)
|
|
if(nh)
|
|
(*nh)();
|
|
// .. no: throw
|
|
else
|
|
{
|
|
if(options & MMGR_TRACE)
|
|
log("[D] EXIT : %s\n", allocator);
|
|
|
|
throw std::bad_alloc();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void* operator new(size_t size) throw(std::bad_alloc)
|
|
{
|
|
return new_common(size, AT_NEW, 0,0,0);
|
|
}
|
|
|
|
void* operator new[](size_t size) throw(std::bad_alloc)
|
|
{
|
|
return new_common(size, AT_NEW_ARRAY, 0,0,0);
|
|
}
|
|
|
|
void* operator new(size_t size, const char* file, int line)
|
|
{
|
|
locked_log("[?] Overloaded(file,line) global operator new called - check call site");
|
|
return new_common(size, AT_NEW, file,line,0);
|
|
}
|
|
|
|
void* operator new[](size_t size, const char* file, int line)
|
|
{
|
|
locked_log("[?] Overloaded(file,line) global operator new[] called - check call site");
|
|
return new_common(size, AT_NEW_ARRAY, file,line,0);
|
|
}
|
|
|
|
void* operator new(size_t size, const char* file, int line, const char* func)
|
|
{
|
|
return new_common(size, AT_NEW, file,line,func);
|
|
}
|
|
|
|
void* operator new[](size_t size, const char* file, int line, const char* func)
|
|
{
|
|
return new_common(size, AT_NEW_ARRAY, file,line,func);
|
|
}
|
|
|
|
|
|
void operator delete(void* p) throw()
|
|
{
|
|
free_dbg(p, AT_DELETE, 0,0,0, 1);
|
|
}
|
|
void operator delete[](void* p) throw()
|
|
{
|
|
free_dbg(p, AT_DELETE_ARRAY, 0,0,0, 1);
|
|
}
|
|
|
|
//
|
|
// called by compiler after a ctor (during the counterpart overloaded global
|
|
// operator new) raises an exception. not accessible from user code.
|
|
//
|
|
|
|
void operator delete(void* p, const char* file, int line) throw()
|
|
{
|
|
locked_log("[?] Overloaded(file,line) global operator delete called, i.e. exception raised in a ctor");
|
|
free_dbg(p, AT_DELETE, file,line,0, 1);
|
|
}
|
|
void operator delete[](void* p, const char* file, int line) throw()
|
|
{
|
|
locked_log("[?] Overloaded(file,line) global operator delete[] called, i.e. exception raised in a ctor");
|
|
free_dbg(p, AT_DELETE_ARRAY, file,line,0, 1);
|
|
}
|
|
|
|
void operator delete(void* p, const char* file, int line, const char* func) throw()
|
|
{
|
|
locked_log("[?] Overloaded(file,line,func) global operator delete called, i.e. exception raised in a ctor");
|
|
free_dbg(p, AT_DELETE, file,line,func, 1);
|
|
}
|
|
void operator delete[](void* p, const char* file, int line, const char* func) throw()
|
|
{
|
|
locked_log("[?] Overloaded(file,line,func) global operator delete[] called, i.e. exception raised in a ctor");
|
|
free_dbg(p, AT_DELETE_ARRAY, file,line,func, 1);
|
|
}
|
|
|
|
#endif // #if CONFIG_USE_MMGR
|