作者: ati16800 時間: 2018-1-13 23:08 標題: 請教android-x86 mesa (找到原因但唔識救)
本帖最後由 ati16800 於 2018-1-14 23:49 編輯
整左個android-x86 marshmallow，但係vmware上面行唔到一個超簡單自己寫既unity3d apk (不過係真機就行到)，出signal 11 (SIGSEGV)，想嘗試解決，唔知有無C兄熟mesa可以請教？
現階段只係知死位係gallium_dri.so (pc:005c1191, mesa/main/texcompress_etc.c)，call stack既底係由libunity.so call teximage() (mesa/main/teximage.c)。
直接死因找到了，但唔識點改。具體的code請看#5樓貼。
請各位C兄指點，萬分感謝！
作者: jasonchan35 時間: 2018-1-14 07:48
無 source code 好難知咩事
不過出 SIGSEGV 會唔會係個 Unity Material 有 texture parameter 係 null ?
正常係 Win / Mac / iOS / Android 如果 null texture 只會出 warning
試過係 PS vita 都係會 crash, 結果要 check 晒所有 material 既 texture 唔會有 null
作者: ati16800 時間: 2018-1-14 13:21
本帖最後由 ati16800 於 2018-1-14 13:34 編輯
無 source code 好難知咩事
成套android-x86都有source code，我都係由source code build出來既。bug應該就係mesa call vm driver 之間出現，如果只係d低級錯誤就會好易改。
不過唔好叫我係每一個function前面都加句debug log (雖然已經加左d)，因為數量實在太多了。
作者: jasonchan35 時間: 2018-1-14 16:38
(我) 無 (你) source code 好難知咩事
咁可唔可以 dump 個 call stack 睇睇 ?
作者: ati16800 時間: 2018-1-14 18:26
本帖最後由 ati16800 於 2018-1-14 23:59 編輯
static void st_UnmapTextureImage(struct gl_context *ctx, struct gl_texture_image *texImage, GLuint slice)
{
struct st_context *st = st_context(ctx);
struct st_texture_image *stImage = st_texture_image(texImage);
if (st_etc_fallback(st, texImage)) {
/* Decompress the ETC texture to the mapped one. */
unsigned z = slice + stImage->base.Face;
struct st_texture_image_transfer *itransfer = &stImage->transfer[z];
struct pipe_transfer *transfer = itransfer->transfer;
assert(z == transfer->box.z);
if (transfer->usage & PIPE_TRANSFER_WRITE) {
if (texImage->TexFormat == MESA_FORMAT_ETC1_RGB8) {
........
}
else {
if (itransfer!=NULL) {
_mesa_unpack_etc2_format(itransfer->map, transfer->stride,
itransfer->temp_data, <-------這裡的temp_data=0 ??
itransfer->temp_stride,
transfer->box.width, transfer->box.height,
texImage->TexFormat);
}
}
}
itransfer->temp_data = NULL;
itransfer->temp_stride = 0;
itransfer->map = 0;
}
st_texture_image_unmap(st, stImage, slice);
}
static void
etc2_unpack_rgb8(uint8_t *dst_row,
unsigned dst_stride,
const uint8_t *src_row, <-------這裡的src_row 來自temp_data=0
unsigned src_stride,
unsigned width,
unsigned height)
{
const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
struct etc2_block block;
unsigned x, y, i, j;
for (y = 0; y < height; y += bh) {
const uint8_t *src = src_row; <-------這裡的src 來自src_row=0
/*
* Destination texture may not be a multiple of four texels in
* height. Compute a safe height to avoid writing outside the texture.
*/
const unsigned h = MIN2(bh, height - y);
for (x = 0; x < width; x+= bw) {
/*
* Destination texture may not be a multiple of four texels in
* width. Compute a safe width to avoid writing outside the texture.
*/
const unsigned w = MIN2(bw, width - x);
etc2_rgb8_parse_block(&block, src, <-------這裡的src = 0
false /* punchthrough_alpha */);
for (j = 0; j < h; j++) {
uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps;
for (i = 0; i < w; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst,
false /* punchthrough_alpha */);
dst[3] = 255;
dst += comps;
}
}
src += bs;
}
src_row += src_stride;
}
}
static void
etc2_rgb8_parse_block(struct etc2_block *block,
const uint8_t *src,
GLboolean punchthrough_alpha)
{
unsigned i;
GLboolean diffbit = false;
static const int lookup[8] = { 0, 1, 2, 3, -4, -3, -2, -1 };
const int R_plus_dR = (src[0] >> 3) + lookup[src[0] & 0x7]; <-------這裡的src=0, 0[0]即死。
作者: jasonchan35 時間: 2018-1-15 10:37
temp_data 來自 st_cb_texture.c
null 既可能係 etc_data = null
又或者 st_FreeTextureImageBuffer(), st_UnmapTextureImage() call 左兩次
如果你有 source 可以 check 下 etc_data 係唔係 null,
如果係 null 試下直接 return
不過無個 run 到既 project 只睇 source code 有D難 debug
static void
st_MapTextureImage(struct gl_context *ctx,
struct gl_texture_image *texImage,
GLuint slice, GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut)
{
struct st_context *st = st_context(ctx);
struct st_texture_image *stImage = st_texture_image(texImage);
unsigned pipeMode;
GLubyte *map;
struct pipe_transfer *transfer;
pipeMode = 0x0;
if (mode & GL_MAP_READ_BIT)
pipeMode |= PIPE_TRANSFER_READ;
if (mode & GL_MAP_WRITE_BIT)
pipeMode |= PIPE_TRANSFER_WRITE;
if (mode & GL_MAP_INVALIDATE_RANGE_BIT)
pipeMode |= PIPE_TRANSFER_DISCARD_RANGE;
map = st_texture_image_map(st, stImage, pipeMode, x, y, slice, w, h, 1,
&transfer);
if (map) {
if (st_etc_fallback(st, texImage)) {
/* ETC isn't supported by all gallium drivers, where it's represented
* by uncompressed formats. We store the compressed data (as it's
* needed for image copies in OES_copy_image), and decompress as
* necessary in Unmap.
*
* Note: all ETC1/ETC2 formats have 4x4 block sizes.
*/
unsigned z = transfer->box.z;
struct st_texture_image_transfer *itransfer = &stImage->transfer[z];
unsigned bytes = _mesa_get_format_bytes(texImage->TexFormat);
unsigned stride = *rowStrideOut = itransfer->temp_stride =
_mesa_format_row_stride(texImage->TexFormat, texImage->Width2);
*mapOut = itransfer->temp_data =
stImage->etc_data + ((x / 4) * bytes + (y / 4) * stride) +
z * stride * texImage->Height2 / 4;
itransfer->map = map;
}
else {
/* supported mapping */
*mapOut = map;
*rowStrideOut = transfer->stride;
}
}
else {
*mapOut = NULL;
*rowStrideOut = 0;
}
}
作者: jasonchan35 時間: 2018-1-15 10:43
如果係 Unity o個邊 call 左 unmap 兩次, 再可以 check null 再 return
如果係 Mesa o個邊既 bug, 就要跟下先知, 同埋可以 report 返俾 Mesa 問下點 fix
作者: ati16800 時間: 2018-1-15 23:45
今日build個userdebug版，竟然無死，不過都係出唔到unity3d個splash screen.