Add test of assembly code dispatch.
The first attempt involved using Linux's support for hardware
breakpoints to detect when assembly code was run. However, this doesn't
work with SDE, which is a problem.
This version has the assembly code update a global flags variable when
it's run, but only in non-FIPS and non-debug builds.
Update-Note: Assembly files now pay attention to the NDEBUG preprocessor
symbol. Ensure the build passes the symbol in. (If release builds fail
to link due to missing BORINGSSL_function_hit, this is the cause.)
Change-Id: I6b7ced442b7a77d0b4ae148b00c351f68af89a6e
Reviewed-on: https://boringssl-review.googlesource.com/c/33384
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/include/openssl/cpu.h b/include/openssl/cpu.h
index edac98e..ad5fc94 100644
--- a/include/openssl/cpu.h
+++ b/include/openssl/cpu.h
@@ -190,6 +190,21 @@
#endif // OPENSSL_PPC64LE
+#if !defined(NDEBUG) && !defined(BORINGSSL_FIPS)
+// Runtime CPU dispatch testing support
+
+// BORINGSSL_function_hit is an array of flags. The following functions will
+// set these flags in non-FIPS builds if NDEBUG is not defined.
+// 0: aes_hw_ctr32_encrypt_blocks
+// 1: aes_hw_encrypt
+// 2: aesni_gcm_encrypt
+// 3: aes_hw_set_encrypt_key
+// 4: vpaes_encrypt
+// 5: vpaes_set_encrypt_key
+// 6: bsaes_ctr32_encrypt_blocks
+extern uint8_t BORINGSSL_function_hit[7];
+#endif // !NDEBUG && !FIPS
+
#if defined(__cplusplus)
} // extern C
