| /* GLIB - Library of useful routines for C programming |
| * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
| * file for a list of people on the GLib Team. See the ChangeLog |
| * files for a list of changes. These files are distributed with |
| * GLib at ftp://ftp.gtk.org/pub/gtk/. |
| */ |
| |
| /* |
| * MT safe |
| */ |
| |
| #include "config.h" |
| |
| #include "gmem.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <signal.h> |
| |
| #include "glib-init.h" |
| |
| #include "gslice.h" |
| #include "gbacktrace.h" |
| #include "gtestutils.h" |
| #include "gthread.h" |
| #include "glib_trace.h" |
| |
| #define MEM_PROFILE_TABLE_SIZE 4096 |
| |
| |
| /* notes on macros: |
| * having G_DISABLE_CHECKS defined disables use of glib_mem_profiler_table and |
| * g_mem_profile(). |
| * REALLOC_0_WORKS is defined if g_realloc (NULL, x) works. |
| * SANE_MALLOC_PROTOS is defined if the systems malloc() and friends functions |
| * match the corresponding GLib prototypes, keep configure.ac and gmem.h in sync here. |
| * g_mem_gc_friendly is TRUE, freed memory should be 0-wiped. |
| */ |
| |
| /* --- malloc wrappers --- */ |
| #ifndef REALLOC_0_WORKS |
| static gpointer |
| standard_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| if (!mem) |
| return malloc (n_bytes); |
| else |
| return realloc (mem, n_bytes); |
| } |
| #endif /* !REALLOC_0_WORKS */ |
| |
| #ifdef SANE_MALLOC_PROTOS |
| # define standard_malloc malloc |
| # ifdef REALLOC_0_WORKS |
| # define standard_realloc realloc |
| # endif /* REALLOC_0_WORKS */ |
| # define standard_free free |
| # define standard_calloc calloc |
| # define standard_try_malloc malloc |
| # define standard_try_realloc realloc |
| #else /* !SANE_MALLOC_PROTOS */ |
| static gpointer |
| standard_malloc (gsize n_bytes) |
| { |
| return malloc (n_bytes); |
| } |
| # ifdef REALLOC_0_WORKS |
| static gpointer |
| standard_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| return realloc (mem, n_bytes); |
| } |
| # endif /* REALLOC_0_WORKS */ |
| static void |
| standard_free (gpointer mem) |
| { |
| free (mem); |
| } |
| static gpointer |
| standard_calloc (gsize n_blocks, |
| gsize n_bytes) |
| { |
| return calloc (n_blocks, n_bytes); |
| } |
| #define standard_try_malloc standard_malloc |
| #define standard_try_realloc standard_realloc |
| #endif /* !SANE_MALLOC_PROTOS */ |
| |
| |
| /* --- variables --- */ |
| static GMemVTable glib_mem_vtable = { |
| standard_malloc, |
| standard_realloc, |
| standard_free, |
| standard_calloc, |
| standard_try_malloc, |
| standard_try_realloc, |
| }; |
| |
| /** |
| * SECTION:memory |
| * @Short_Description: general memory-handling |
| * @Title: Memory Allocation |
| * |
| * These functions provide support for allocating and freeing memory. |
| * |
| * <note> |
| * If any call to allocate memory fails, the application is terminated. |
| * This also means that there is no need to check if the call succeeded. |
| * </note> |
| * |
| * <note> |
| * It's important to match g_malloc() with g_free(), plain malloc() with free(), |
| * and (if you're using C++) new with delete and new[] with delete[]. Otherwise |
| * bad things can happen, since these allocators may use different memory |
| * pools (and new/delete call constructors and destructors). See also |
| * g_mem_set_vtable(). |
| * </note> |
| */ |
| |
| /* --- functions --- */ |
| /** |
| * g_malloc: |
| * @n_bytes: the number of bytes to allocate |
| * |
| * Allocates @n_bytes bytes of memory. |
| * If @n_bytes is 0 it returns %NULL. |
| * |
| * Returns: a pointer to the allocated memory |
| */ |
| gpointer |
| g_malloc (gsize n_bytes) |
| { |
| if (G_LIKELY (n_bytes)) |
| { |
| gpointer mem; |
| |
| mem = glib_mem_vtable.malloc (n_bytes); |
| TRACE (GLIB_MEM_ALLOC((void*) mem, (unsigned int) n_bytes, 0, 0)); |
| if (mem) |
| return mem; |
| |
| g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_bytes); |
| } |
| |
| TRACE(GLIB_MEM_ALLOC((void*) NULL, (int) n_bytes, 0, 0)); |
| |
| return NULL; |
| } |
| |
| /** |
| * g_malloc0: |
| * @n_bytes: the number of bytes to allocate |
| * |
| * Allocates @n_bytes bytes of memory, initialized to 0's. |
| * If @n_bytes is 0 it returns %NULL. |
| * |
| * Returns: a pointer to the allocated memory |
| */ |
| gpointer |
| g_malloc0 (gsize n_bytes) |
| { |
| if (G_LIKELY (n_bytes)) |
| { |
| gpointer mem; |
| |
| mem = glib_mem_vtable.calloc (1, n_bytes); |
| TRACE (GLIB_MEM_ALLOC((void*) mem, (unsigned int) n_bytes, 1, 0)); |
| if (mem) |
| return mem; |
| |
| g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_bytes); |
| } |
| |
| TRACE(GLIB_MEM_ALLOC((void*) NULL, (int) n_bytes, 1, 0)); |
| |
| return NULL; |
| } |
| |
| /** |
| * g_realloc: |
| * @mem: the memory to reallocate |
| * @n_bytes: new size of the memory in bytes |
| * |
| * Reallocates the memory pointed to by @mem, so that it now has space for |
| * @n_bytes bytes of memory. It returns the new address of the memory, which may |
| * have been moved. @mem may be %NULL, in which case it's considered to |
| * have zero-length. @n_bytes may be 0, in which case %NULL will be returned |
| * and @mem will be freed unless it is %NULL. |
| * |
| * Returns: the new address of the allocated memory |
| */ |
| gpointer |
| g_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| gpointer newmem; |
| |
| if (G_LIKELY (n_bytes)) |
| { |
| newmem = glib_mem_vtable.realloc (mem, n_bytes); |
| TRACE (GLIB_MEM_REALLOC((void*) newmem, (void*)mem, (unsigned int) n_bytes, 0)); |
| if (newmem) |
| return newmem; |
| |
| g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_bytes); |
| } |
| |
| if (mem) |
| glib_mem_vtable.free (mem); |
| |
| TRACE (GLIB_MEM_REALLOC((void*) NULL, (void*)mem, 0, 0)); |
| |
| return NULL; |
| } |
| |
| /** |
| * g_free: |
| * @mem: the memory to free |
| * |
| * Frees the memory pointed to by @mem. |
| * If @mem is %NULL it simply returns. |
| */ |
| void |
| g_free (gpointer mem) |
| { |
| if (G_LIKELY (mem)) |
| glib_mem_vtable.free (mem); |
| TRACE(GLIB_MEM_FREE((void*) mem)); |
| } |
| |
| /** |
| * g_try_malloc: |
| * @n_bytes: number of bytes to allocate. |
| * |
| * Attempts to allocate @n_bytes, and returns %NULL on failure. |
| * Contrast with g_malloc(), which aborts the program on failure. |
| * |
| * Returns: the allocated memory, or %NULL. |
| */ |
| gpointer |
| g_try_malloc (gsize n_bytes) |
| { |
| gpointer mem; |
| |
| if (G_LIKELY (n_bytes)) |
| mem = glib_mem_vtable.try_malloc (n_bytes); |
| else |
| mem = NULL; |
| |
| TRACE (GLIB_MEM_ALLOC((void*) mem, (unsigned int) n_bytes, 0, 1)); |
| |
| return mem; |
| } |
| |
| /** |
| * g_try_malloc0: |
| * @n_bytes: number of bytes to allocate |
| * |
| * Attempts to allocate @n_bytes, initialized to 0's, and returns %NULL on |
| * failure. Contrast with g_malloc0(), which aborts the program on failure. |
| * |
| * Since: 2.8 |
| * Returns: the allocated memory, or %NULL |
| */ |
| gpointer |
| g_try_malloc0 (gsize n_bytes) |
| { |
| gpointer mem; |
| |
| if (G_LIKELY (n_bytes)) |
| mem = glib_mem_vtable.try_malloc (n_bytes); |
| else |
| mem = NULL; |
| |
| if (mem) |
| memset (mem, 0, n_bytes); |
| |
| return mem; |
| } |
| |
| /** |
| * g_try_realloc: |
| * @mem: previously-allocated memory, or %NULL. |
| * @n_bytes: number of bytes to allocate. |
| * |
| * Attempts to realloc @mem to a new size, @n_bytes, and returns %NULL |
| * on failure. Contrast with g_realloc(), which aborts the program |
| * on failure. If @mem is %NULL, behaves the same as g_try_malloc(). |
| * |
| * Returns: the allocated memory, or %NULL. |
| */ |
| gpointer |
| g_try_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| gpointer newmem; |
| |
| if (G_LIKELY (n_bytes)) |
| newmem = glib_mem_vtable.try_realloc (mem, n_bytes); |
| else |
| { |
| newmem = NULL; |
| if (mem) |
| glib_mem_vtable.free (mem); |
| } |
| |
| TRACE (GLIB_MEM_REALLOC((void*) newmem, (void*)mem, (unsigned int) n_bytes, 1)); |
| |
| return newmem; |
| } |
| |
| |
| #define SIZE_OVERFLOWS(a,b) (G_UNLIKELY ((b) > 0 && (a) > G_MAXSIZE / (b))) |
| |
| /** |
| * g_malloc_n: |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_malloc(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: a pointer to the allocated memory |
| */ |
| gpointer |
| g_malloc_n (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| { |
| g_error ("%s: overflow allocating %"G_GSIZE_FORMAT"*%"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_blocks, n_block_bytes); |
| } |
| |
| return g_malloc (n_blocks * n_block_bytes); |
| } |
| |
| /** |
| * g_malloc0_n: |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_malloc0(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: a pointer to the allocated memory |
| */ |
| gpointer |
| g_malloc0_n (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| { |
| g_error ("%s: overflow allocating %"G_GSIZE_FORMAT"*%"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_blocks, n_block_bytes); |
| } |
| |
| return g_malloc0 (n_blocks * n_block_bytes); |
| } |
| |
| /** |
| * g_realloc_n: |
| * @mem: the memory to reallocate |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_realloc(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: the new address of the allocated memory |
| */ |
| gpointer |
| g_realloc_n (gpointer mem, |
| gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| { |
| g_error ("%s: overflow allocating %"G_GSIZE_FORMAT"*%"G_GSIZE_FORMAT" bytes", |
| G_STRLOC, n_blocks, n_block_bytes); |
| } |
| |
| return g_realloc (mem, n_blocks * n_block_bytes); |
| } |
| |
| /** |
| * g_try_malloc_n: |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_try_malloc(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: the allocated memory, or %NULL. |
| */ |
| gpointer |
| g_try_malloc_n (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| return NULL; |
| |
| return g_try_malloc (n_blocks * n_block_bytes); |
| } |
| |
| /** |
| * g_try_malloc0_n: |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_try_malloc0(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: the allocated memory, or %NULL |
| */ |
| gpointer |
| g_try_malloc0_n (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| return NULL; |
| |
| return g_try_malloc0 (n_blocks * n_block_bytes); |
| } |
| |
| /** |
| * g_try_realloc_n: |
| * @mem: previously-allocated memory, or %NULL. |
| * @n_blocks: the number of blocks to allocate |
| * @n_block_bytes: the size of each block in bytes |
| * |
| * This function is similar to g_try_realloc(), allocating (@n_blocks * @n_block_bytes) bytes, |
| * but care is taken to detect possible overflow during multiplication. |
| * |
| * Since: 2.24 |
| * Returns: the allocated memory, or %NULL. |
| */ |
| gpointer |
| g_try_realloc_n (gpointer mem, |
| gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) |
| return NULL; |
| |
| return g_try_realloc (mem, n_blocks * n_block_bytes); |
| } |
| |
| |
| |
| static gpointer |
| fallback_calloc (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| gsize l = n_blocks * n_block_bytes; |
| gpointer mem = glib_mem_vtable.malloc (l); |
| |
| if (mem) |
| memset (mem, 0, l); |
| |
| return mem; |
| } |
| |
| static gboolean vtable_set = FALSE; |
| |
| /** |
| * g_mem_is_system_malloc |
| * |
| * Checks whether the allocator used by g_malloc() is the system's |
| * malloc implementation. If it returns %TRUE memory allocated with |
| * malloc() can be used interchangeable with memory allocated using g_malloc(). |
| * This function is useful for avoiding an extra copy of allocated memory returned |
| * by a non-GLib-based API. |
| * |
| * A different allocator can be set using g_mem_set_vtable(). |
| * |
| * Return value: if %TRUE, malloc() and g_malloc() can be mixed. |
| **/ |
| gboolean |
| g_mem_is_system_malloc (void) |
| { |
| return !vtable_set; |
| } |
| |
| /** |
| * g_mem_set_vtable: |
| * @vtable: table of memory allocation routines. |
| * |
| * Sets the #GMemVTable to use for memory allocation. You can use this to provide |
| * custom memory allocation routines. <emphasis>This function must be called |
| * before using any other GLib functions.</emphasis> The @vtable only needs to |
| * provide malloc(), realloc(), and free() functions; GLib can provide default |
| * implementations of the others. The malloc() and realloc() implementations |
| * should return %NULL on failure, GLib will handle error-checking for you. |
| * @vtable is copied, so need not persist after this function has been called. |
| */ |
| void |
| g_mem_set_vtable (GMemVTable *vtable) |
| { |
| if (!vtable_set) |
| { |
| if (vtable->malloc && vtable->realloc && vtable->free) |
| { |
| glib_mem_vtable.malloc = vtable->malloc; |
| glib_mem_vtable.realloc = vtable->realloc; |
| glib_mem_vtable.free = vtable->free; |
| glib_mem_vtable.calloc = vtable->calloc ? vtable->calloc : fallback_calloc; |
| glib_mem_vtable.try_malloc = vtable->try_malloc ? vtable->try_malloc : glib_mem_vtable.malloc; |
| glib_mem_vtable.try_realloc = vtable->try_realloc ? vtable->try_realloc : glib_mem_vtable.realloc; |
| vtable_set = TRUE; |
| } |
| else |
| g_warning (G_STRLOC ": memory allocation vtable lacks one of malloc(), realloc() or free()"); |
| } |
| else |
| g_warning (G_STRLOC ": memory allocation vtable can only be set once at startup"); |
| } |
| |
| |
| /* --- memory profiling and checking --- */ |
| #ifdef G_DISABLE_CHECKS |
| /** |
| * glib_mem_profiler_table: |
| * |
| * A #GMemVTable containing profiling variants of the memory |
| * allocation functions. Use them together with g_mem_profile() |
| * in order to get information about the memory allocation pattern |
| * of your program. |
| */ |
| GMemVTable *glib_mem_profiler_table = &glib_mem_vtable; |
| void |
| g_mem_profile (void) |
| { |
| } |
| #else /* !G_DISABLE_CHECKS */ |
| typedef enum { |
| PROFILER_FREE = 0, |
| PROFILER_ALLOC = 1, |
| PROFILER_RELOC = 2, |
| PROFILER_ZINIT = 4 |
| } ProfilerJob; |
| static guint *profile_data = NULL; |
| static gsize profile_allocs = 0; |
| static gsize profile_zinit = 0; |
| static gsize profile_frees = 0; |
| static GMutex gmem_profile_mutex; |
| #ifdef G_ENABLE_DEBUG |
| static volatile gsize g_trap_free_size = 0; |
| static volatile gsize g_trap_realloc_size = 0; |
| static volatile gsize g_trap_malloc_size = 0; |
| #endif /* G_ENABLE_DEBUG */ |
| |
| #define PROFILE_TABLE(f1,f2,f3) ( ( ((f3) << 2) | ((f2) << 1) | (f1) ) * (MEM_PROFILE_TABLE_SIZE + 1)) |
| |
| static void |
| profiler_log (ProfilerJob job, |
| gsize n_bytes, |
| gboolean success) |
| { |
| g_mutex_lock (&gmem_profile_mutex); |
| if (!profile_data) |
| { |
| profile_data = standard_calloc ((MEM_PROFILE_TABLE_SIZE + 1) * 8, |
| sizeof (profile_data[0])); |
| if (!profile_data) /* memory system kiddin' me, eh? */ |
| { |
| g_mutex_unlock (&gmem_profile_mutex); |
| return; |
| } |
| } |
| |
| if (n_bytes < MEM_PROFILE_TABLE_SIZE) |
| profile_data[n_bytes + PROFILE_TABLE ((job & PROFILER_ALLOC) != 0, |
| (job & PROFILER_RELOC) != 0, |
| success != 0)] += 1; |
| else |
| profile_data[MEM_PROFILE_TABLE_SIZE + PROFILE_TABLE ((job & PROFILER_ALLOC) != 0, |
| (job & PROFILER_RELOC) != 0, |
| success != 0)] += 1; |
| if (success) |
| { |
| if (job & PROFILER_ALLOC) |
| { |
| profile_allocs += n_bytes; |
| if (job & PROFILER_ZINIT) |
| profile_zinit += n_bytes; |
| } |
| else |
| profile_frees += n_bytes; |
| } |
| g_mutex_unlock (&gmem_profile_mutex); |
| } |
| |
| static void |
| profile_print_locked (guint *local_data, |
| gboolean success) |
| { |
| gboolean need_header = TRUE; |
| guint i; |
| |
| for (i = 0; i <= MEM_PROFILE_TABLE_SIZE; i++) |
| { |
| glong t_malloc = local_data[i + PROFILE_TABLE (1, 0, success)]; |
| glong t_realloc = local_data[i + PROFILE_TABLE (1, 1, success)]; |
| glong t_free = local_data[i + PROFILE_TABLE (0, 0, success)]; |
| glong t_refree = local_data[i + PROFILE_TABLE (0, 1, success)]; |
| |
| if (!t_malloc && !t_realloc && !t_free && !t_refree) |
| continue; |
| else if (need_header) |
| { |
| need_header = FALSE; |
| g_print (" blocks of | allocated | freed | allocated | freed | n_bytes \n"); |
| g_print (" n_bytes | n_times by | n_times by | n_times by | n_times by | remaining \n"); |
| g_print (" | malloc() | free() | realloc() | realloc() | \n"); |
| g_print ("===========|============|============|============|============|===========\n"); |
| } |
| if (i < MEM_PROFILE_TABLE_SIZE) |
| g_print ("%10u | %10ld | %10ld | %10ld | %10ld |%+11ld\n", |
| i, t_malloc, t_free, t_realloc, t_refree, |
| (t_malloc - t_free + t_realloc - t_refree) * i); |
| else if (i >= MEM_PROFILE_TABLE_SIZE) |
| g_print (" >%6u | %10ld | %10ld | %10ld | %10ld | ***\n", |
| i, t_malloc, t_free, t_realloc, t_refree); |
| } |
| if (need_header) |
| g_print (" --- none ---\n"); |
| } |
| |
| /** |
| * g_mem_profile: |
| * @void: |
| * |
| * Outputs a summary of memory usage. |
| * |
| * It outputs the frequency of allocations of different sizes, |
| * the total number of bytes which have been allocated, |
| * the total number of bytes which have been freed, |
| * and the difference between the previous two values, i.e. the number of bytes |
| * still in use. |
| * |
| * Note that this function will not output anything unless you have |
| * previously installed the #glib_mem_profiler_table with g_mem_set_vtable(). |
| */ |
| |
| void |
| g_mem_profile (void) |
| { |
| guint local_data[(MEM_PROFILE_TABLE_SIZE + 1) * 8 * sizeof (profile_data[0])]; |
| gsize local_allocs; |
| gsize local_zinit; |
| gsize local_frees; |
| |
| g_mutex_lock (&gmem_profile_mutex); |
| |
| local_allocs = profile_allocs; |
| local_zinit = profile_zinit; |
| local_frees = profile_frees; |
| |
| if (!profile_data) |
| { |
| g_mutex_unlock (&gmem_profile_mutex); |
| return; |
| } |
| |
| memcpy (local_data, profile_data, |
| (MEM_PROFILE_TABLE_SIZE + 1) * 8 * sizeof (profile_data[0])); |
| |
| g_mutex_unlock (&gmem_profile_mutex); |
| |
| g_print ("GLib Memory statistics (successful operations):\n"); |
| profile_print_locked (local_data, TRUE); |
| g_print ("GLib Memory statistics (failing operations):\n"); |
| profile_print_locked (local_data, FALSE); |
| g_print ("Total bytes: allocated=%"G_GSIZE_FORMAT", " |
| "zero-initialized=%"G_GSIZE_FORMAT" (%.2f%%), " |
| "freed=%"G_GSIZE_FORMAT" (%.2f%%), " |
| "remaining=%"G_GSIZE_FORMAT"\n", |
| local_allocs, |
| local_zinit, |
| ((gdouble) local_zinit) / local_allocs * 100.0, |
| local_frees, |
| ((gdouble) local_frees) / local_allocs * 100.0, |
| local_allocs - local_frees); |
| } |
| |
| static gpointer |
| profiler_try_malloc (gsize n_bytes) |
| { |
| gsize *p; |
| |
| #ifdef G_ENABLE_DEBUG |
| if (g_trap_malloc_size == n_bytes) |
| G_BREAKPOINT (); |
| #endif /* G_ENABLE_DEBUG */ |
| |
| p = standard_malloc (sizeof (gsize) * 2 + n_bytes); |
| |
| if (p) |
| { |
| p[0] = 0; /* free count */ |
| p[1] = n_bytes; /* length */ |
| profiler_log (PROFILER_ALLOC, n_bytes, TRUE); |
| p += 2; |
| } |
| else |
| profiler_log (PROFILER_ALLOC, n_bytes, FALSE); |
| |
| return p; |
| } |
| |
| static gpointer |
| profiler_malloc (gsize n_bytes) |
| { |
| gpointer mem = profiler_try_malloc (n_bytes); |
| |
| if (!mem) |
| g_mem_profile (); |
| |
| return mem; |
| } |
| |
| static gpointer |
| profiler_calloc (gsize n_blocks, |
| gsize n_block_bytes) |
| { |
| gsize l = n_blocks * n_block_bytes; |
| gsize *p; |
| |
| #ifdef G_ENABLE_DEBUG |
| if (g_trap_malloc_size == l) |
| G_BREAKPOINT (); |
| #endif /* G_ENABLE_DEBUG */ |
| |
| p = standard_calloc (1, sizeof (gsize) * 2 + l); |
| |
| if (p) |
| { |
| p[0] = 0; /* free count */ |
| p[1] = l; /* length */ |
| profiler_log (PROFILER_ALLOC | PROFILER_ZINIT, l, TRUE); |
| p += 2; |
| } |
| else |
| { |
| profiler_log (PROFILER_ALLOC | PROFILER_ZINIT, l, FALSE); |
| g_mem_profile (); |
| } |
| |
| return p; |
| } |
| |
| static void |
| profiler_free (gpointer mem) |
| { |
| gsize *p = mem; |
| |
| p -= 2; |
| if (p[0]) /* free count */ |
| { |
| g_warning ("free(%p): memory has been freed %"G_GSIZE_FORMAT" times already", |
| p + 2, p[0]); |
| profiler_log (PROFILER_FREE, |
| p[1], /* length */ |
| FALSE); |
| } |
| else |
| { |
| #ifdef G_ENABLE_DEBUG |
| if (g_trap_free_size == p[1]) |
| G_BREAKPOINT (); |
| #endif /* G_ENABLE_DEBUG */ |
| |
| profiler_log (PROFILER_FREE, |
| p[1], /* length */ |
| TRUE); |
| memset (p + 2, 0xaa, p[1]); |
| |
| /* for all those that miss standard_free (p); in this place, yes, |
| * we do leak all memory when profiling, and that is intentional |
| * to catch double frees. patch submissions are futile. |
| */ |
| } |
| p[0] += 1; |
| } |
| |
| static gpointer |
| profiler_try_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| gsize *p = mem; |
| |
| p -= 2; |
| |
| #ifdef G_ENABLE_DEBUG |
| if (g_trap_realloc_size == n_bytes) |
| G_BREAKPOINT (); |
| #endif /* G_ENABLE_DEBUG */ |
| |
| if (mem && p[0]) /* free count */ |
| { |
| g_warning ("realloc(%p, %"G_GSIZE_FORMAT"): " |
| "memory has been freed %"G_GSIZE_FORMAT" times already", |
| p + 2, (gsize) n_bytes, p[0]); |
| profiler_log (PROFILER_ALLOC | PROFILER_RELOC, n_bytes, FALSE); |
| |
| return NULL; |
| } |
| else |
| { |
| p = standard_realloc (mem ? p : NULL, sizeof (gsize) * 2 + n_bytes); |
| |
| if (p) |
| { |
| if (mem) |
| profiler_log (PROFILER_FREE | PROFILER_RELOC, p[1], TRUE); |
| p[0] = 0; |
| p[1] = n_bytes; |
| profiler_log (PROFILER_ALLOC | PROFILER_RELOC, p[1], TRUE); |
| p += 2; |
| } |
| else |
| profiler_log (PROFILER_ALLOC | PROFILER_RELOC, n_bytes, FALSE); |
| |
| return p; |
| } |
| } |
| |
| static gpointer |
| profiler_realloc (gpointer mem, |
| gsize n_bytes) |
| { |
| mem = profiler_try_realloc (mem, n_bytes); |
| |
| if (!mem) |
| g_mem_profile (); |
| |
| return mem; |
| } |
| |
| static GMemVTable profiler_table = { |
| profiler_malloc, |
| profiler_realloc, |
| profiler_free, |
| profiler_calloc, |
| profiler_try_malloc, |
| profiler_try_realloc, |
| }; |
| GMemVTable *glib_mem_profiler_table = &profiler_table; |
| |
| #endif /* !G_DISABLE_CHECKS */ |