diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/bufferobj.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index 3e011ef5b23..a49da3d3b58 100644 --- a/src/mesa/main/bufferobj.c +++ b/src/mesa/main/bufferobj.c @@ -39,6 +39,11 @@ #include "bufferobj.h" +/* Debug flags */ +/*#define VBO_DEBUG*/ +/*#define BOUNDS_CHECK*/ + + #ifdef FEATURE_OES_mapbuffer #define DEFAULT_ACCESS GL_WRITE_ONLY; #else @@ -1019,6 +1024,9 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size, bufObj->Name, size, data, usage); #endif +#ifdef BOUNDS_CHECK + size += 100; +#endif /* Give the buffer object to the driver! <data> may be null! */ ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj ); } @@ -1119,6 +1127,17 @@ _mesa_MapBufferARB(GLenum target, GLenum access) } #endif +#ifdef BOUNDS_CHECK + { + GLubyte *buf = (GLubyte *) bufObj->Pointer; + GLuint i; + /* buffer is 100 bytes larger than requested, fill with magic value */ + for (i = 0; i < 100; i++) { + buf[bufObj->Size - i - 1] = 123; + } + } +#endif + return bufObj->Pointer; } @@ -1145,6 +1164,22 @@ _mesa_UnmapBufferARB(GLenum target) return GL_FALSE; } +#ifdef BOUNDS_CHECK + if (bufObj->Access != GL_READ_ONLY_ARB) { + GLubyte *buf = (GLubyte *) bufObj->Pointer; + GLuint i; + /* check that last 100 bytes are still = magic value */ + for (i = 0; i < 100; i++) { + GLuint pos = bufObj->Size - i - 1; + if (buf[pos] != 123) { + _mesa_warning(ctx, "Out of bounds buffer object write detected" + " at position %d (value = %u)\n", + pos, buf[pos]); + } + } + } +#endif + #ifdef VBO_DEBUG if (bufObj->Access == GL_WRITE_ONLY_ARB) { GLuint i, unchanged = 0; |