DEBUG macro define

本文详细介绍了如何使用DEBUG_PRINT宏进行条件打印,通过宏定义简化了调试过程,提供了在不同编译环境下进行高效调试的实用技巧。

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#define DEBUG_PRINT(args...) printf("%s:%d ", __FUNCTION__, __LINE__); \
                             printf(args)
make -C …/…/ /root/bpf/linux-4.19.90/samples/bpf/ BPF_SAMPLES_PATH=/root/bpf/linux-4.19.90/samples/bpf make[1]: Entering directory ‘/root/bpf/linux-4.19.90’ CALL scripts/checksyscalls.sh DESCEND objtool make -C /root/bpf/linux-4.19.90/samples/bpf/…/…/tools/lib/bpf/ RM=‘rm -rf’ LDFLAGS= srctree=/root/bpf/linux-4.19.90/samples/bpf/…/…/ O= Warning: Kernel ABI header at ‘tools/include/uapi/linux/bpf.h’ differs from latest version at ‘include/uapi/linux/bpf.h’ CLANG-bpf /root/bpf/linux-4.19.90/samples/bpf/xdp_whitelist_kern.o In file included from /root/bpf/linux-4.19.90/samples/bpf/xdp_whitelist_kern.c:4: In file included from ./include/linux/tcp.h:24: ./include/net/inet_connection_sock.h:214:3: error: use of undeclared identifier ‘KBUILD_MODNAME’ pr_debug(“inet_csk BUG: unknown timer value\n”); ^ ./include/linux/printk.h:340:2: note: expanded from macro ‘pr_debug’ dynamic_pr_debug(fmt, ##VA_ARGS) ^ ./include/linux/dynamic_debug.h:125:2: note: expanded from macro ‘dynamic_pr_debugDEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); ^ ./include/linux/dynamic_debug.h:99:2: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA’ DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, .key.dd_key_false, ^ ./include/linux/dynamic_debug.h:77:14: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA_KEY’ .modname = KBUILD_MODNAME, ^ In file included from /root/bpf/linux-4.19.90/samples/bpf/xdp_whitelist_kern.c:4: In file included from ./include/linux/tcp.h:24: ./include/net/inet_connection_sock.h:228:3: error: use of undeclared identifier ‘KBUILD_MODNAME’ pr_debug(“reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n”, ^ ./include/linux/printk.h:340:2: note: expanded from macro ‘pr_debug’ dynamic_pr_debug(fmt, ##VA_ARGS) ^ ./include/linux/dynamic_debug.h:125:2: note: expanded from macro ‘dynamic_pr_debugDEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); ^ ./include/linux/dynamic_debug.h:99:2: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA’ DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, .key.dd_key_false, ^ ./include/linux/dynamic_debug.h:77:14: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA_KEY’ .modname = KBUILD_MODNAME, ^ In file included from /root/bpf/linux-4.19.90/samples/bpf/xdp_whitelist_kern.c:4: In file included from ./include/linux/tcp.h:24: ./include/net/inet_connection_sock.h:244:3: error: use of undeclared identifier ‘KBUILD_MODNAME’ pr_debug(“inet_csk BUG: unknown timer value\n”); ^ ./include/linux/printk.h:340:2: note: expanded from macro ‘pr_debug’ dynamic_pr_debug(fmt, ##VA_ARGS) ^ ./include/linux/dynamic_debug.h:125:2: note: expanded from macro ‘dynamic_pr_debugDEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); ^ ./include/linux/dynamic_debug.h:99:2: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA’ DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, .key.dd_key_false, ^ ./include/linux/dynamic_debug.h:77:14: note: expanded from macroDEFINE_DYNAMIC_DEBUG_METADATA_KEY’ .modname = KBUILD_MODNAME, ^ 3 errors generated. make[1]: Leaving directory ‘/root/bpf/linux-4.19.90’
最新发布
07-22
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