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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/kernel/gcov/gcc_4_7.c
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@@ -33,6 +33,13 @@
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 #define GCOV_TAG_FUNCTION_LENGTH	3
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+/* Since GCC 12.1 sizes are in BYTES and not in WORDS (4B). */
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+#if (__GNUC__ >= 12)
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+#define GCOV_UNIT_SIZE				4
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+#else
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+#define GCOV_UNIT_SIZE				1
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+#endif
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+
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 static struct gcov_info *gcov_info_head;
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 /**
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@@ -70,7 +77,7 @@
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 	unsigned int ident;
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 	unsigned int lineno_checksum;
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 	unsigned int cfg_checksum;
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-	struct gcov_ctr_info ctrs[0];
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+	struct gcov_ctr_info ctrs[];
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 };
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 /**
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@@ -451,12 +458,18 @@
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 	pos += store_gcov_u32(buffer, pos, info->version);
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 	pos += store_gcov_u32(buffer, pos, info->stamp);
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+#if (__GNUC__ >= 12)
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+	/* Use zero as checksum of the compilation unit. */
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+	pos += store_gcov_u32(buffer, pos, 0);
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+#endif
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+
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 	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
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 		fi_ptr = info->functions[fi_idx];
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 		/* Function record. */
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 		pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
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-		pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH);
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+		pos += store_gcov_u32(buffer, pos,
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+			GCOV_TAG_FUNCTION_LENGTH * GCOV_UNIT_SIZE);
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 		pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
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 		pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);
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 		pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
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@@ -470,7 +483,8 @@
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 			/* Counter record. */
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 			pos += store_gcov_u32(buffer, pos,
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 					      GCOV_TAG_FOR_COUNTER(ct_idx));
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-			pos += store_gcov_u32(buffer, pos, ci_ptr->num * 2);
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+			pos += store_gcov_u32(buffer, pos,
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+				ci_ptr->num * 2 * GCOV_UNIT_SIZE);
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 			for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
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 				pos += store_gcov_u64(buffer, pos,