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[PATCH 3/3] Use code cache in aarch64 prologue analyzer
- From: Yao Qi <qiyaoltc at gmail dot com>
- To: gdb-patches at sourceware dot org
- Date: Tue, 6 Dec 2016 15:03:49 +0000
- Subject: [PATCH 3/3] Use code cache in aarch64 prologue analyzer
- Authentication-results: sourceware.org; auth=none
- References: <1481036629-21542-1-git-send-email-yao.qi@linaro.org>
This patch change aarch prologue analyzer using code cache, in order
to improve the performance of remote debugging.
gdb.perf/skip-prologue.exp (measured by wall-time) is improved when
the program is compiled without debug information.
Original Patched Original Patched
without dbg without dbg with dbg with dbg
/ 11.1635239124 9.99472999573 9.65339517593 9.66648793221
-fstack-protector-all 11.2560930252 9.338118 9.63896489143 9.59474396706
gdb:
2016-12-06 Yao Qi <yao.qi@linaro.org>
* aarch64-tdep.c (instruction_reader::read): Call
read_code_unsigned_integer instead of
read_memory_unsigned_integer.
---
gdb/aarch64-tdep.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 590dcf6..0175630 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -213,7 +213,7 @@ class instruction_reader : public abstract_instruction_reader
public:
ULONGEST read (CORE_ADDR memaddr, int len, enum bfd_endian byte_order)
{
- return read_memory_unsigned_integer (memaddr, len, byte_order);
+ return read_code_unsigned_integer (memaddr, len, byte_order);
}
};
--
1.9.1