Context |
Check |
Description |
bpf/vmtest-bpf-next-VM_Test-43 |
success
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Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-47 |
success
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Logs for x86_64-llvm-18 / veristat
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bpf/vmtest-bpf-next-VM_Test-45 |
success
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Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-46 |
success
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Logs for x86_64-llvm-18 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-44 |
success
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Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-33 |
success
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Logs for x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-21 |
success
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Logs for x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-23 |
success
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Logs for x86_64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-22 |
success
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Logs for x86_64-gcc / test (test_progs, false, 360) / test_progs on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-24 |
success
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Logs for x86_64-gcc / test (test_progs_no_alu32_parallel, true, 30) / test_progs_no_alu32_parallel on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-25 |
success
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Logs for x86_64-gcc / test (test_progs_parallel, true, 30) / test_progs_parallel on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-27 |
success
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Logs for x86_64-gcc / veristat / veristat on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-30 |
success
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Logs for x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-31 |
success
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Logs for x86_64-llvm-17 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-32 |
success
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Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-38 |
success
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Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-37 |
success
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Logs for x86_64-llvm-18 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-39 |
success
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Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-40 |
success
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Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-2 |
success
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Logs for Unittests
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bpf/vmtest-bpf-next-VM_Test-0 |
success
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Logs for Lint
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bpf/vmtest-bpf-next-VM_Test-1 |
success
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Logs for ShellCheck
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bpf/vmtest-bpf-next-VM_Test-5 |
success
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Logs for aarch64-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-3 |
success
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Logs for Validate matrix.py
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bpf/vmtest-bpf-next-PR |
fail
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merge-conflict
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bpf/vmtest-bpf-next-VM_Test-13 |
success
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Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-4 |
success
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Logs for aarch64-gcc / build / build for aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-14 |
success
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Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-16 |
success
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Logs for s390x-gcc / test (test_verifier, false, 360) / test_verifier on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-15 |
success
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Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-17 |
success
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Logs for s390x-gcc / veristat
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bpf/vmtest-bpf-next-VM_Test-6 |
success
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Logs for aarch64-gcc / test (test_maps, false, 360) / test_maps on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-7 |
success
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Logs for aarch64-gcc / test (test_progs, false, 360) / test_progs on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-20 |
success
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Logs for x86_64-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-10 |
success
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Logs for aarch64-gcc / veristat
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bpf/vmtest-bpf-next-VM_Test-8 |
success
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Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-11 |
success
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Logs for s390x-gcc / build / build for s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-12 |
success
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Logs for s390x-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-18 |
success
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Logs for set-matrix
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bpf/vmtest-bpf-next-VM_Test-9 |
success
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Logs for aarch64-gcc / test (test_verifier, false, 360) / test_verifier on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-19 |
success
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Logs for x86_64-gcc / build / build for x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-36 |
success
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Logs for x86_64-llvm-18 / build-release / build for x86_64 with llvm-18 and -O2 optimization
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bpf/vmtest-bpf-next-VM_Test-26 |
success
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Logs for x86_64-gcc / test (test_verifier, false, 360) / test_verifier on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-29 |
success
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Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17 and -O2 optimization
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bpf/vmtest-bpf-next-VM_Test-28 |
success
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Logs for x86_64-llvm-17 / build / build for x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-34 |
success
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Logs for x86_64-llvm-17 / veristat
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bpf/vmtest-bpf-next-VM_Test-41 |
success
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Logs for x86_64-llvm-18 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-35 |
success
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Logs for x86_64-llvm-18 / build / build for x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-42 |
success
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Logs for x86_64-llvm-18 / veristat
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@@ -29,6 +29,7 @@ static inline void *bpf_iter_num_new(struct bpf_iter_num *it, int i, int j) { re
static inline void bpf_iter_num_destroy(struct bpf_iter_num *it) {}
static inline bool bpf_iter_num_next(struct bpf_iter_num *it) { return true; }
#define cond_break ({})
+#define can_loop true
#endif
/* Safely walk link list elements. Deletion of elements is allowed. */
@@ -36,8 +37,7 @@ static inline bool bpf_iter_num_next(struct bpf_iter_num *it) { return true; }
for (void * ___tmp = (pos = list_entry_safe((head)->first, \
typeof(*(pos)), member), \
(void *)0); \
- pos && ({ ___tmp = (void *)pos->member.next; 1; }); \
- cond_break, \
+ pos && ({ ___tmp = (void *)pos->member.next; 1; }) && can_loop; \
pos = list_entry_safe((void __arena *)___tmp, typeof(*(pos)), member))
static inline void list_add_head(arena_list_node_t *n, arena_list_head_t *h)
@@ -326,7 +326,21 @@ l_true: \
})
#endif
+/* Note that cond_break can only be portably used in the body of a
+ breakable construct, whereas can_loop can be used anywhere. */
+
#ifdef __BPF_FEATURE_MAY_GOTO
+#define can_loop \
+ ({ __label__ l_break, l_continue; \
+ bool ret = true; \
+ asm volatile goto("may_goto %l[l_break]" \
+ :::: l_break); \
+ goto l_continue; \
+ l_break: ret = false; \
+ l_continue:; \
+ ret; \
+ })
+
#define cond_break \
({ __label__ l_break, l_continue; \
asm volatile goto("may_goto %l[l_break]" \
@@ -336,6 +350,20 @@ l_true: \
l_continue:; \
})
#else
+#define can_loop \
+ ({ __label__ l_break, l_continue; \
+ bool ret = true; \
+ asm volatile goto("1:.byte 0xe5; \
+ .byte 0; \
+ .long ((%l[l_break] - 1b - 8) / 8) & 0xffff; \
+ .short 0" \
+ :::: l_break); \
+ goto l_continue; \
+ l_break: ret = false; \
+ l_continue:; \
+ ret; \
+ })
+
#define cond_break \
({ __label__ l_break, l_continue; \
asm volatile goto("1:.byte 0xe5; \
@@ -49,7 +49,7 @@ int arena_list_add(void *ctx)
list_head = &global_head;
- for (i = zero; i < cnt; cond_break, i++) {
+ for (i = zero; i < cnt && can_loop; i++) {
struct elem __arena *n = bpf_alloc(sizeof(*n));
test_val++;
@@ -318,7 +318,7 @@ int cond_break1(const void *ctx)
unsigned long i;
unsigned int sum = 0;
- for (i = zero; i < ARR_SZ; cond_break, i++)
+ for (i = zero; i < ARR_SZ && can_loop; i++)
sum += i;
for (i = zero; i < ARR_SZ; i++) {
barrier_var(i);
@@ -336,12 +336,11 @@ int cond_break2(const void *ctx)
int i, j;
int sum = 0;
- for (i = zero; i < 1000; cond_break, i++)
+ for (i = zero; i < 1000 && can_loop; i++)
for (j = zero; j < 1000; j++) {
sum += i + j;
cond_break;
- }
-
+ }
return sum;
}
@@ -349,7 +348,7 @@ static __noinline int loop(void)
{
int i, sum = 0;
- for (i = zero; i <= 1000000; i++, cond_break)
+ for (i = zero; i <= 1000000 && can_loop; i++)
sum += i;
return sum;
[Changes from V1: - The __compat_break has been abandoned in favor of a more readable can_loop macro that can be used anywhere, including loop conditions.] The macro list_for_each_entry is defined in bpf_arena_list.h as follows: #define list_for_each_entry(pos, head, member) \ for (void * ___tmp = (pos = list_entry_safe((head)->first, \ typeof(*(pos)), member), \ (void *)0); \ pos && ({ ___tmp = (void *)pos->member.next; 1; }); \ cond_break, \ pos = list_entry_safe((void __arena *)___tmp, typeof(*(pos)), member)) The macro cond_break, in turn, expands to a statement expression that contains a `break' statement. Compound statement expressions, and the subsequent ability of placing statements in the header of a `for' loop, are GNU extensions. Unfortunately, clang implements this GNU extension differently than GCC: - In GCC the `break' statement is bound to the containing "breakable" context in which the defining `for' appears. If there is no such context, GCC emits a warning: break statement without enclosing `for' o `switch' statement. - In clang the `break' statement is bound to the defining `for'. If the defining `for' is itself inside some breakable construct, then clang emits a -Wgcc-compat warning. This patch adds a new macro can_loop to bpf_experimental, that implements the same logic than cond_break but evaluates to a boolean expression. The patch also changes all the current instances of usage of cond_break withing the header of loop accordingly. Tested in bpf-next master. No regressions. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com> Cc: david.faust@oracle.com Cc: cupertino.miranda@oracle.com Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> --- tools/testing/selftests/bpf/bpf_arena_list.h | 4 +-- .../testing/selftests/bpf/bpf_experimental.h | 28 +++++++++++++++++++ .../testing/selftests/bpf/progs/arena_list.c | 2 +- .../bpf/progs/verifier_iterating_callbacks.c | 9 +++--- 4 files changed, 35 insertions(+), 8 deletions(-)