@@ -185,6 +185,18 @@ static void test_workload(void)
big_var[rand() % DAWR_MAX_LEN] = 'a';
else
cvar = big_var[rand() % DAWR_MAX_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO test */
+ gstruct.a[rand() % A_LEN] = 'a';
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO test */
+ cvar = gstruct.b[rand() % B_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO test */
+ gstruct.a[rand() % A_LEN] = 'a';
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO test */
+ cvar = gstruct.a[rand() % A_LEN];
}
static void check_success(pid_t child_pid, const char *name, const char *type,
@@ -374,6 +386,69 @@ static void test_sethwdebug_range_aligned(pid_t child_pid)
ptrace_delhwdebug(child_pid, wh);
}
+static void test_multi_sethwdebug_range(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info1, info2;
+ unsigned long wp_addr1, wp_addr2;
+ char *name1 = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED";
+ char *name2 = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED";
+ int len1, len2;
+ int wh1, wh2;
+
+ wp_addr1 = (unsigned long)&gstruct.a;
+ wp_addr2 = (unsigned long)&gstruct.b;
+ len1 = A_LEN;
+ len2 = B_LEN;
+ get_ppc_hw_breakpoint(&info1, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr1, len1);
+ get_ppc_hw_breakpoint(&info2, PPC_BREAKPOINT_TRIGGER_READ, wp_addr2, len2);
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO test */
+ wh1 = ptrace_sethwdebug(child_pid, &info1);
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO test */
+ wh2 = ptrace_sethwdebug(child_pid, &info2);
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name1, "WO", wp_addr1, len1);
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name2, "RO", wp_addr2, len2);
+
+ ptrace_delhwdebug(child_pid, wh1);
+ ptrace_delhwdebug(child_pid, wh2);
+}
+
+static void test_multi_sethwdebug_range_dawr_overlap(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info1, info2;
+ unsigned long wp_addr1, wp_addr2;
+ char *name = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap";
+ int len1, len2;
+ int wh1, wh2;
+
+ wp_addr1 = (unsigned long)&gstruct.a;
+ wp_addr2 = (unsigned long)&gstruct.a;
+ len1 = A_LEN;
+ len2 = A_LEN;
+ get_ppc_hw_breakpoint(&info1, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr1, len1);
+ get_ppc_hw_breakpoint(&info2, PPC_BREAKPOINT_TRIGGER_READ, wp_addr2, len2);
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO test */
+ wh1 = ptrace_sethwdebug(child_pid, &info1);
+
+ /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO test */
+ wh2 = ptrace_sethwdebug(child_pid, &info2);
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "WO", wp_addr1, len1);
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RO", wp_addr2, len2);
+
+ ptrace_delhwdebug(child_pid, wh1);
+ ptrace_delhwdebug(child_pid, wh2);
+}
+
static void test_sethwdebug_range_unaligned(pid_t child_pid)
{
struct ppc_hw_breakpoint info;
@@ -460,6 +535,10 @@ run_tests(pid_t child_pid, struct ppc_debug_info *dbginfo, bool dawr)
test_sethwdebug_range_unaligned(child_pid);
test_sethwdebug_range_unaligned_dar(child_pid);
test_sethwdebug_dawr_max_range(child_pid);
+ if (dbginfo->num_data_bps > 1) {
+ test_multi_sethwdebug_range(child_pid);
+ test_multi_sethwdebug_range_dawr_overlap(child_pid);
+ }
}
}
}
Add selftests to test multiple active DAWRs with ptrace interface. Sample o/p: $ ./ptrace-hwbreak ... PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO, len: 6: Ok Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> --- .../selftests/powerpc/ptrace/ptrace-hwbreak.c | 79 +++++++++++++++++++ 1 file changed, 79 insertions(+)