b94f991e4a
Use `static __thread` storage for a large buffer which was allocated in the stack frame. Musl has a rather small per thread stack frame size.
35 lines
1.4 KiB
Diff
35 lines
1.4 KiB
Diff
Reduce the stack footprint of pixman's function
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general_composite_rect() which allocates a large buffer
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`stack_scanline_buffer`. Make it `static __thread` instead.
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--- pixman/pixman-general.c 2015-12-27 21:37:37.000000000 +0100
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+++ pixman/pixman-general.c 2016-05-05 12:24:47.346661080 +0200
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@@ -128,8 +128,8 @@
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pixman_composite_info_t *info)
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{
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PIXMAN_COMPOSITE_ARGS (info);
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- uint8_t stack_scanline_buffer[3 * SCANLINE_BUFFER_LENGTH];
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- uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
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+ static __thread uint8_t static_scanline_buffer[3 * SCANLINE_BUFFER_LENGTH];
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+ uint8_t *scanline_buffer = (uint8_t *) static_scanline_buffer;
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uint8_t *src_buffer, *mask_buffer, *dest_buffer;
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pixman_iter_t src_iter, mask_iter, dest_iter;
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pixman_combine_32_func_t compose;
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@@ -158,7 +158,7 @@
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if (width <= 0 || _pixman_multiply_overflows_int (width, Bpp * 3))
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return;
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- if (width * Bpp * 3 > sizeof (stack_scanline_buffer) - 15 * 3)
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+ if (width * Bpp * 3 > sizeof (static_scanline_buffer) - 15 * 3)
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{
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scanline_buffer = pixman_malloc_ab_plus_c (width, Bpp * 3, 15 * 3);
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@@ -232,7 +232,7 @@
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if (dest_iter.fini)
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dest_iter.fini (&dest_iter);
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- if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
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+ if (scanline_buffer != (uint8_t *) static_scanline_buffer)
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free (scanline_buffer);
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}
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