diff options
| -rw-r--r-- | src/gallium/auxiliary/Makefile | 1 | ||||
| -rw-r--r-- | src/gallium/auxiliary/SConscript | 1 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_debug_refcnt.c | 156 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_debug_refcnt.h | 29 |
4 files changed, 187 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/Makefile b/src/gallium/auxiliary/Makefile index 7bd6a33a19d..287ee8c29f5 100644 --- a/src/gallium/auxiliary/Makefile +++ b/src/gallium/auxiliary/Makefile @@ -94,6 +94,7 @@ C_SOURCES = \ translate/translate_cache.c \ util/u_debug.c \ util/u_debug_describe.c \ + util/u_debug_refcnt.c \ util/u_debug_symbol.c \ util/u_debug_stack.c \ util/u_dump_defines.c \ diff --git a/src/gallium/auxiliary/SConscript b/src/gallium/auxiliary/SConscript index 0ece469f365..93bfe9f01f9 100644 --- a/src/gallium/auxiliary/SConscript +++ b/src/gallium/auxiliary/SConscript @@ -149,6 +149,7 @@ source = [ 'util/u_debug.c', 'util/u_debug_describe.c', 'util/u_debug_memory.c', + 'util/u_debug_refcnt.c', 'util/u_debug_stack.c', 'util/u_debug_symbol.c', 'util/u_dump_defines.c', diff --git a/src/gallium/auxiliary/util/u_debug_refcnt.c b/src/gallium/auxiliary/util/u_debug_refcnt.c new file mode 100644 index 00000000000..9d6fca56ab3 --- /dev/null +++ b/src/gallium/auxiliary/util/u_debug_refcnt.c @@ -0,0 +1,156 @@ +#if defined(DEBUG) && (!defined(PIPE_OS_WINDOWS) || defined(PIPE_SUBSYSTEM_WINDOWS_USER)) + +/* see http://www.mozilla.org/performance/refcnt-balancer.html for what do with the output + * on Linux, use tools/addr2line.sh to postprocess it before anything else + **/ +#include <util/u_debug.h> +#include <util/u_debug_refcnt.h> +#include <util/u_debug_stack.h> +#include <util/u_debug_symbol.h> +#include <util/u_string.h> +#include <util/u_hash_table.h> +#include <os/os_thread.h> +#include <os/os_stream.h> + +int debug_refcnt_state; + +struct os_stream* stream; + +/* TODO: maybe move this serial machinery to a stand-alone module and expose it? */ +static pipe_mutex serials_mutex; +static struct util_hash_table* serials_hash; +static unsigned serials_last; + +static unsigned hash_ptr(void* p) +{ + return (unsigned)(uintptr_t)p; +} + +static int compare_ptr(void* a, void* b) +{ + if(a == b) + return 0; + else if(a < b) + return -1; + else + return 1; +} + +static boolean debug_serial(void* p, unsigned* pserial) +{ + unsigned serial; + boolean found = TRUE; + pipe_mutex_lock(serials_mutex); + if(!serials_hash) + serials_hash = util_hash_table_create(hash_ptr, compare_ptr); + serial = (unsigned)(uintptr_t)util_hash_table_get(serials_hash, p); + if(!serial) + { + /* time to stop logging... (you'll have a 100 GB logfile at least at this point) + * TODO: avoid this + */ + serial = ++serials_last; + if(!serial) + { + debug_error("More than 2^32 objects detected, aborting.\n"); + os_abort(); + } + + util_hash_table_set(serials_hash, p, (void*)(uintptr_t)serial); + found = FALSE; + } + pipe_mutex_unlock(serials_mutex); + *pserial = serial; + return found; +} + +static void debug_serial_delete(void* p) +{ + pipe_mutex_lock(serials_mutex); + util_hash_table_remove(serials_hash, p); + pipe_mutex_unlock(serials_mutex); +} + +#define STACK_LEN 64 + +static void dump_stack(const char* symbols[STACK_LEN]) +{ + unsigned i; + for(i = 0; i < STACK_LEN; ++i) + { + if(symbols[i]) + os_stream_printf(stream, "%s\n", symbols[i]); + } + os_stream_write(stream, "\n", 1); +} + +void debug_reference_slowpath(const struct pipe_reference* p, void* pget_desc, int change) +{ + if(debug_refcnt_state < 0) + return; + + if(!debug_refcnt_state) + { + const char* filename = debug_get_option("GALLIUM_REFCNT_LOG", NULL); + if(filename && filename[0]) + stream = os_file_stream_create(filename); + + if(stream) + debug_refcnt_state = 1; + else + debug_refcnt_state = -1; + } + + if(debug_refcnt_state > 0) + { + struct debug_stack_frame frames[STACK_LEN]; + const char* symbols[STACK_LEN]; + char buf[1024]; + + void (*get_desc)(char*, const struct pipe_reference*) = pget_desc; + unsigned i; + unsigned refcnt = p->count; + unsigned serial; + boolean existing = debug_serial((void*)p, &serial); + + debug_backtrace_capture(frames, 1, STACK_LEN); + for(i = 0; i < STACK_LEN; ++i) + { + if(frames[i].function) + symbols[i] = debug_symbol_name_cached(frames[i].function); + else + symbols[i] = 0; + } + + get_desc(buf, p); + + if(!existing) + { + os_stream_printf(stream, "<%s> %p %u Create\n", buf, p, serial); + dump_stack(symbols); + + /* this is there to provide a gradual change even if we don't see the initialization */ + for(i = 1; i <= refcnt - change; ++i) + { + os_stream_printf(stream, "<%s> %p %u AddRef %u\n", buf, p, serial, i); + dump_stack(symbols); + } + } + + if(change) + { + os_stream_printf(stream, "<%s> %p %u %s %u\n", buf, p, serial, change > 0 ? "AddRef" : "Release", refcnt); + dump_stack(symbols); + } + + if(!refcnt) + { + debug_serial_delete((void*)p); + os_stream_printf(stream, "<%s> %p %u Destroy\n", buf, p, serial); + dump_stack(symbols); + } + + os_stream_flush(stream); + } +} +#endif diff --git a/src/gallium/auxiliary/util/u_debug_refcnt.h b/src/gallium/auxiliary/util/u_debug_refcnt.h new file mode 100644 index 00000000000..e48a2a645cc --- /dev/null +++ b/src/gallium/auxiliary/util/u_debug_refcnt.h @@ -0,0 +1,29 @@ +/* + * u_debug_refcnt.h + * + * Created on: Aug 17, 2010 + * Author: lb + */ + +#ifndef U_DEBUG_REFCNT_H_ +#define U_DEBUG_REFCNT_H_ + +#include <pipe/p_config.h> +#include <pipe/p_state.h> + +#if defined(DEBUG) && (!defined(PIPE_OS_WINDOWS) || defined(PIPE_SUBSYSTEM_WINDOWS_USER)) +extern int debug_refcnt_state; + +void debug_reference_slowpath(const struct pipe_reference* p, void* get_desc, int change); + +static INLINE void debug_reference(const struct pipe_reference* p, void* get_desc, int change) +{ + if(debug_refcnt_state >= 0) + debug_reference_slowpath(p, get_desc, change); +} +#else +static INLINE void debug_reference(const struct pipe_reference* p, void* get_desc, const char* op) +{} +#endif + +#endif /* U_DEBUG_REFCNT_H_ */ |