Module: Mesa Branch: staging/20.0 Commit: 1defcf02b49975a92e20997e5c5bd41e7794677f URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=1defcf02b49975a92e20997e5c5bd41e7794677f
Author: Andrii Simiklit <[email protected]> Date: Wed Jan 15 12:34:38 2020 +0200 Revert "glx: convert glx_config_create_list to one big calloc" This reverts commit 35fc7bdf0e6ad6547e39099e7060a3d89539b56d. Unfortunately mentioned commit introduced a memory leak because `driwindowsMapConfigs` and `createDriMode` functions allocate small memory portions for each element: 21,576 (232 direct, 21,344 indirect) bytes in 1 blocks are definitely lost in loss record 1,411 of 1,414 at 0x483A7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x5D4AA09: createDriMode (dri_common.c:291) by 0x5D4ABF5: driConvertConfigs (dri_common.c:310) by 0x5D58414: dri3_create_screen (dri3_glx.c:945) by 0x5D39829: AllocAndFetchScreenConfigs (glxext.c:815) by 0x5D39C57: __glXInitialize (glxext.c:941) by 0x5D3290A: GetGLXPrivScreenConfig (glxcmds.c:174) by 0x5D34F38: glXQueryExtensionsString (glxcmds.c:1307) by 0x4F83038: glXQueryExtensionsString (in /usr/local/lib/libGL.so.1.7.0) by 0x4F2EA6B: ??? (in /usr/lib/x86_64-linux-gnu/libwaffle-1.so.0.6.0) by 0x4F2A0D7: waffle_display_connect (in /usr/lib/x86_64-linux-gnu/libwaffle-1.so.0.6.0) by 0x498F42A: wfl_checked_display_connect (piglit-util-waffle.h:74) There is one more thing which disallow us to easily fix it are different element sizes for instance: `glx_config_create_list` allocates memory just for `glx_config`, `driwindowsMapConfigs` for `driwindows_config` and `createDriMode` for `__GLXDRIconfigPrivate`. Yes it is possible but size of such fix will be more big and complex than original one. So it make sense only if the malloc overhead really is a big problem there. Acked-by: Eric Engestrom <[email protected]> Signed-off-by: Andrii Simiklit <[email protected]> Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3406> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3406> (cherry picked from commit 311c82e1923f63070b198881d90c1098f4ff7a08) --- .pick_status.json | 2 +- src/glx/glxconfig.c | 63 +++++++++++++++++++++++++++++++---------------------- 2 files changed, 38 insertions(+), 27 deletions(-) diff --git a/.pick_status.json b/.pick_status.json index 4756005ed94..414cbf394c5 100644 --- a/.pick_status.json +++ b/.pick_status.json @@ -94,7 +94,7 @@ "description": "Revert \"glx: convert glx_config_create_list to one big calloc\"", "nominated": true, "nomination_type": 2, - "resolution": 0, + "resolution": 1, "master_sha": null, "because_sha": "35fc7bdf0e6ad6547e39099e7060a3d89539b56d" }, diff --git a/src/glx/glxconfig.c b/src/glx/glxconfig.c index 569d24bfac5..6c4267c8f39 100644 --- a/src/glx/glxconfig.c +++ b/src/glx/glxconfig.c @@ -218,43 +218,54 @@ glx_config_get(struct glx_config * mode, int attribute, int *value_return) _X_HIDDEN struct glx_config * glx_config_create_list(unsigned count) { - struct glx_config *c = NULL; + const size_t size = sizeof(struct glx_config); + struct glx_config *base = NULL; + struct glx_config **next; unsigned i; - if (!(c = calloc(count, sizeof(struct glx_config)))) - return NULL; - + next = &base; for (i = 0; i < count; i++) { - c[i].visualID = GLX_DONT_CARE; - c[i].visualType = GLX_DONT_CARE; - c[i].visualRating = GLX_NONE; - c[i].transparentPixel = GLX_NONE; - c[i].transparentRed = GLX_DONT_CARE; - c[i].transparentGreen = GLX_DONT_CARE; - c[i].transparentBlue = GLX_DONT_CARE; - c[i].transparentAlpha = GLX_DONT_CARE; - c[i].transparentIndex = GLX_DONT_CARE; - c[i].xRenderable = GLX_DONT_CARE; - c[i].fbconfigID = GLX_DONT_CARE; - c[i].swapMethod = GLX_SWAP_UNDEFINED_OML; - c[i].bindToTextureRgb = GLX_DONT_CARE; - c[i].bindToTextureRgba = GLX_DONT_CARE; - c[i].bindToMipmapTexture = GLX_DONT_CARE; - c[i].bindToTextureTargets = GLX_DONT_CARE; - c[i].yInverted = GLX_DONT_CARE; - c[i].sRGBCapable = GLX_DONT_CARE; + *next = calloc(1, size); + if (*next == NULL) { + glx_config_destroy_list(base); + base = NULL; + break; + } + + (*next)->visualID = GLX_DONT_CARE; + (*next)->visualType = GLX_DONT_CARE; + (*next)->visualRating = GLX_NONE; + (*next)->transparentPixel = GLX_NONE; + (*next)->transparentRed = GLX_DONT_CARE; + (*next)->transparentGreen = GLX_DONT_CARE; + (*next)->transparentBlue = GLX_DONT_CARE; + (*next)->transparentAlpha = GLX_DONT_CARE; + (*next)->transparentIndex = GLX_DONT_CARE; + (*next)->xRenderable = GLX_DONT_CARE; + (*next)->fbconfigID = GLX_DONT_CARE; + (*next)->swapMethod = GLX_SWAP_UNDEFINED_OML; + (*next)->bindToTextureRgb = GLX_DONT_CARE; + (*next)->bindToTextureRgba = GLX_DONT_CARE; + (*next)->bindToMipmapTexture = GLX_DONT_CARE; + (*next)->bindToTextureTargets = GLX_DONT_CARE; + (*next)->yInverted = GLX_DONT_CARE; + (*next)->sRGBCapable = GLX_DONT_CARE; - if (i != count -1) - c[i].next = &(c[i+1]); + next = &((*next)->next); } - return c; + return base; } _X_HIDDEN void glx_config_destroy_list(struct glx_config *configs) { - free(configs); + while (configs != NULL) { + struct glx_config *const next = configs->next; + + free(configs); + configs = next; + } } _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
