89 lines
2.5 KiB
Diff
89 lines
2.5 KiB
Diff
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From eb8d1bbdfea80a50ce9fbf3238062a543036f855 Mon Sep 17 00:00:00 2001
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From: Gustavo Zacarias <gustavo@zacarias.com.ar>
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Date: Tue, 7 Oct 2014 11:03:03 -0300
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Subject: [PATCH] btrfs-progs: add option to disable backtrace usage
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This commit adds the support for a make variable named
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"DISABLE_BACKTRACE" which allows to disable the support for backtrace()
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usage on ASSERT(), BUG() and BUG_ON() calls.
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This is useful because some alternative C libraries like uClibc have
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optional support for backtrace() which is rarely built when debugging
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isn't taking place.
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Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
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---
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Makefile | 4 ++++
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kerncompat.h | 15 +++++++++++++++
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2 files changed, 19 insertions(+)
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diff --git a/Makefile b/Makefile
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index 7cc7783..03a4779 100644
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--- a/Makefile
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+++ b/Makefile
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@@ -63,6 +63,10 @@ BUILDDIRS = $(patsubst %,build-%,$(SUBDIRS))
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INSTALLDIRS = $(patsubst %,install-%,$(SUBDIRS))
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CLEANDIRS = $(patsubst %,clean-%,$(SUBDIRS))
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+ifeq ($(DISABLE_BACKTRACE),1)
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+AM_CFLAGS += -DBTRFS_DISABLE_BACKTRACE
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+endif
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+
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ifneq ($(DISABLE_DOCUMENTATION),1)
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BUILDDIRS += build-Documentation
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INSTALLDIRS += install-Documentation
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diff --git a/kerncompat.h b/kerncompat.h
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index 19c7fa5..889d94c 100644
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--- a/kerncompat.h
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+++ b/kerncompat.h
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@@ -29,7 +29,9 @@
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#include <stddef.h>
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#include <linux/types.h>
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#include <stdint.h>
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+#ifndef BTRFS_DISABLE_BACKTRACE
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#include <execinfo.h>
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+#endif
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#define ptr_to_u64(x) ((u64)(uintptr_t)x)
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#define u64_to_ptr(x) ((void *)(uintptr_t)x)
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@@ -55,6 +57,7 @@
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#define ULONG_MAX (~0UL)
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#endif
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+#ifndef BTRFS_DISABLE_BACKTRACE
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#define MAX_BACKTRACE 16
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static inline void print_trace(void)
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{
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@@ -81,6 +84,9 @@ static inline void assert_trace(const char *assertion, const char *filename,
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}
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#define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0)
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+#else
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+#define BUG() assert(0)
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+#endif
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#ifdef __CHECKER__
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#define __force __attribute__((force))
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@@ -264,10 +270,19 @@ static inline long IS_ERR(const void *ptr)
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#define kstrdup(x, y) strdup(x)
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#define kfree(x) free(x)
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+#ifndef BTRFS_DISABLE_BACKTRACE
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#define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c))
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+#else
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+#define BUG_ON(c) assert(!(c))
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+#endif
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#define WARN_ON(c) BUG_ON(c)
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+
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+#ifndef BTRFS_DISABLE_BACKTRACE
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#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c))
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+#else
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+#define ASSERT(c) assert(c)
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+#endif
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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--
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2.0.4
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