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一是内存管理涉及到硬件的实现原理和软件的复杂算法，二是网上关于内存管理的解释有太多错误的解释。希望...
{ int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the code...
接着,调用bpf_object__create_map函数将struct bpf_map_def信息提取到unionbpf_attr attr中;bpf_attr联合体中集成了bpf系统调用创建map所需要的系数,包括:key_size, value_size, map_type,max_entries等等。 最后,调用syscall(__NR_bpf, BPF_MAP_CREATE, attr, attr_size)系统调用进入内核 3.2 bpf BPF_MAP_...
ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) Remove sentinel element from bpf_syscall_table. ...
> I was wondering, whether the mem[BPF_MEMWORDS] array in function > pcapint_filter_with_aux_data in bpf_filter.c should be initialized? If the > switch hits cases BPF_LD|BPF_MEM or BPF_LDX|BPF_MEM the variables A or X are > filled with random uninitialized data from the array. ...
BPF_EXIT_INSN(), }; size_t insns_cnt = sizeof(insns) / sizeof(struct bpf_insn); size_t insns_cnt = ARRAY_SIZE(insns); struct bpf_object *obj; int err; 3 changes: 2 additions & 1 deletion 3 samples/bpf/sock_example.c Original file line numberDiff line numberDiff line ch...
This leads to an out-of-bound access on that array in the bpf_object__for_each_program loop and could corrupt other variables on the stack. On our testing QEMU, it corrupts the map1_fds array and causes the sample to fail: # ./syscall_tp prog #0: map ids 4 5 verify map:4 val...