#include <sys/wait.h>
#include "ptrace.h"
-/* Breakpoint access modes */
-enum {
- BP_X = 1,
- BP_RW = 2,
- BP_W = 4,
-};
-
-static pid_t child_pid;
-static struct ppc_debug_info dbginfo;
-
-static void get_dbginfo(void)
-{
- int ret;
-
- ret = ptrace(PPC_PTRACE_GETHWDBGINFO, child_pid, NULL, &dbginfo);
- if (ret) {
- perror("Can't get breakpoint info\n");
- exit(-1);
- }
-}
-
-static bool hwbreak_present(void)
-{
- return (dbginfo.num_data_bps != 0);
-}
+/*
+ * Use volatile on all global var so that compiler doesn't
+ * optimise their load/stores. Otherwise selftest can fail.
+ */
+static volatile __u64 glvar;
-static bool dawr_present(void)
-{
- return !!(dbginfo.features & PPC_DEBUG_FEATURE_DATA_BP_DAWR);
-}
+#define DAWR_MAX_LEN 512
+static volatile __u8 big_var[DAWR_MAX_LEN] __attribute__((aligned(512)));
-static void set_breakpoint_addr(void *addr)
-{
- int ret;
+#define A_LEN 6
+#define B_LEN 6
+struct gstruct {
+ __u8 a[A_LEN]; /* double word aligned */
+ __u8 b[B_LEN]; /* double word unaligned */
+};
+static volatile struct gstruct gstruct __attribute__((aligned(512)));
- ret = ptrace(PTRACE_SET_DEBUGREG, child_pid, 0, addr);
- if (ret) {
- perror("Can't set breakpoint addr\n");
- exit(-1);
- }
-}
-static int set_hwbreakpoint_addr(void *addr, int range)
+static void get_dbginfo(pid_t child_pid, struct ppc_debug_info *dbginfo)
{
- int ret;
-
- struct ppc_hw_breakpoint info;
-
- info.version = 1;
- info.trigger_type = PPC_BREAKPOINT_TRIGGER_RW;
- info.addr_mode = PPC_BREAKPOINT_MODE_EXACT;
- if (range > 0)
- info.addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE;
- info.condition_mode = PPC_BREAKPOINT_CONDITION_NONE;
- info.addr = (__u64)addr;
- info.addr2 = (__u64)addr + range;
- info.condition_value = 0;
-
- ret = ptrace(PPC_PTRACE_SETHWDEBUG, child_pid, 0, &info);
- if (ret < 0) {
- perror("Can't set breakpoint\n");
+ if (ptrace(PPC_PTRACE_GETHWDBGINFO, child_pid, NULL, dbginfo)) {
+ perror("Can't get breakpoint info");
exit(-1);
}
- return ret;
}
-static int del_hwbreakpoint_addr(int watchpoint_handle)
+static bool dawr_present(struct ppc_debug_info *dbginfo)
{
- int ret;
-
- ret = ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, watchpoint_handle);
- if (ret < 0) {
- perror("Can't delete hw breakpoint\n");
- exit(-1);
- }
- return ret;
+ return !!(dbginfo->features & PPC_DEBUG_FEATURE_DATA_BP_DAWR);
}
-#define DAWR_LENGTH_MAX 512
-
-/* Dummy variables to test read/write accesses */
-static unsigned long long
- dummy_array[DAWR_LENGTH_MAX / sizeof(unsigned long long)]
- __attribute__((aligned(512)));
-static unsigned long long *dummy_var = dummy_array;
-
static void write_var(int len)
{
- long long *plval;
- char *pcval;
- short *psval;
- int *pival;
+ __u8 *pcvar;
+ __u16 *psvar;
+ __u32 *pivar;
+ __u64 *plvar;
switch (len) {
case 1:
- pcval = (char *)dummy_var;
- *pcval = 0xff;
+ pcvar = (__u8 *)&glvar;
+ *pcvar = 0xff;
break;
case 2:
- psval = (short *)dummy_var;
- *psval = 0xffff;
+ psvar = (__u16 *)&glvar;
+ *psvar = 0xffff;
break;
case 4:
- pival = (int *)dummy_var;
- *pival = 0xffffffff;
+ pivar = (__u32 *)&glvar;
+ *pivar = 0xffffffff;
break;
case 8:
- plval = (long long *)dummy_var;
- *plval = 0xffffffffffffffffLL;
+ plvar = (__u64 *)&glvar;
+ *plvar = 0xffffffffffffffffLL;
break;
}
}
static void read_var(int len)
{
- char cval __attribute__((unused));
- short sval __attribute__((unused));
- int ival __attribute__((unused));
- long long lval __attribute__((unused));
+ __u8 cvar __attribute__((unused));
+ __u16 svar __attribute__((unused));
+ __u32 ivar __attribute__((unused));
+ __u64 lvar __attribute__((unused));
switch (len) {
case 1:
- cval = *(char *)dummy_var;
+ cvar = (__u8)glvar;
break;
case 2:
- sval = *(short *)dummy_var;
+ svar = (__u16)glvar;
break;
case 4:
- ival = *(int *)dummy_var;
+ ivar = (__u32)glvar;
break;
case 8:
- lval = *(long long *)dummy_var;
+ lvar = (__u64)glvar;
break;
}
}
-/*
- * Do the r/w accesses to trigger the breakpoints. And run
- * the usual traps.
- */
-static void trigger_tests(void)
+static void test_workload(void)
{
- int len, ret;
+ __u8 cvar __attribute__((unused));
+ __u32 ivar __attribute__((unused));
+ int len = 0;
- ret = ptrace(PTRACE_TRACEME, 0, NULL, 0);
- if (ret) {
- perror("Can't be traced?\n");
- return;
+ if (ptrace(PTRACE_TRACEME, 0, NULL, 0)) {
+ perror("Child can't be traced?");
+ exit(-1);
}
/* Wake up father so that it sets up the first test */
kill(getpid(), SIGUSR1);
- /* Test write watchpoints */
- for (len = 1; len <= sizeof(long); len <<= 1)
+ /* PTRACE_SET_DEBUGREG, WO test */
+ for (len = 1; len <= sizeof(glvar); len <<= 1)
write_var(len);
- /* Test read/write watchpoints (on read accesses) */
- for (len = 1; len <= sizeof(long); len <<= 1)
+ /* PTRACE_SET_DEBUGREG, RO test */
+ for (len = 1; len <= sizeof(glvar); len <<= 1)
read_var(len);
- /* Test when breakpoint is unset */
-
- /* Test write watchpoints */
- for (len = 1; len <= sizeof(long); len <<= 1)
- write_var(len);
+ /* PTRACE_SET_DEBUGREG, RW test */
+ for (len = 1; len <= sizeof(glvar); len <<= 1) {
+ if (rand() % 2)
+ read_var(len);
+ else
+ write_var(len);
+ }
- /* Test read/write watchpoints (on read accesses) */
- for (len = 1; len <= sizeof(long); len <<= 1)
- read_var(len);
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, WO test */
+ write_var(1);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RO test */
+ read_var(1);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RW test */
+ if (rand() % 2)
+ write_var(1);
+ else
+ read_var(1);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, WO test */
+ gstruct.a[rand() % A_LEN] = 'a';
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, RO test */
+ cvar = gstruct.a[rand() % A_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, RW test */
+ if (rand() % 2)
+ gstruct.a[rand() % A_LEN] = 'a';
+ else
+ cvar = gstruct.a[rand() % A_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, WO test */
+ gstruct.b[rand() % B_LEN] = 'b';
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, RO test */
+ cvar = gstruct.b[rand() % B_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, RW test */
+ if (rand() % 2)
+ gstruct.b[rand() % B_LEN] = 'b';
+ else
+ cvar = gstruct.b[rand() % B_LEN];
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, DAR OUTSIDE, RW test */
+ if (rand() % 2)
+ *((int *)(gstruct.a + 4)) = 10;
+ else
+ ivar = *((int *)(gstruct.a + 4));
+
+ /* PPC_PTRACE_SETHWDEBUG. DAWR_MAX_LEN. RW test */
+ if (rand() % 2)
+ big_var[rand() % DAWR_MAX_LEN] = 'a';
+ else
+ cvar = big_var[rand() % DAWR_MAX_LEN];
}
-static void check_success(const char *msg)
+static void check_success(pid_t child_pid, const char *name, const char *type,
+ unsigned long saddr, int len)
{
- const char *msg2;
int status;
+ siginfo_t siginfo;
+ unsigned long eaddr = (saddr + len - 1) | 0x7;
+
+ saddr &= ~0x7;
/* Wait for the child to SIGTRAP */
wait(&status);
- msg2 = "Failed";
+ ptrace(PTRACE_GETSIGINFO, child_pid, NULL, &siginfo);
- if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
- msg2 = "Child process hit the breakpoint";
+ if (!WIFSTOPPED(status) || WSTOPSIG(status) != SIGTRAP ||
+ (unsigned long)siginfo.si_addr < saddr ||
+ (unsigned long)siginfo.si_addr > eaddr) {
+ printf("%s, %s, len: %d: Fail\n", name, type, len);
+ exit(-1);
}
- printf("%s Result: [%s]\n", msg, msg2);
+ printf("%s, %s, len: %d: Ok\n", name, type, len);
+
+ /*
+ * For ptrace registered watchpoint, signal is generated
+ * before executing load/store. Singlestep the instruction
+ * and then continue the test.
+ */
+ ptrace(PTRACE_SINGLESTEP, child_pid, NULL, 0);
+ wait(NULL);
}
-static void launch_watchpoints(char *buf, int mode, int len,
- struct ppc_debug_info *dbginfo, bool dawr)
+static void ptrace_set_debugreg(pid_t child_pid, unsigned long wp_addr)
{
- const char *mode_str;
- unsigned long data = (unsigned long)(dummy_var);
- int wh, range;
-
- data &= ~0x7UL;
-
- if (mode == BP_W) {
- data |= (1UL << 1);
- mode_str = "write";
- } else {
- data |= (1UL << 0);
- data |= (1UL << 1);
- mode_str = "read";
+ if (ptrace(PTRACE_SET_DEBUGREG, child_pid, 0, wp_addr)) {
+ perror("PTRACE_SET_DEBUGREG failed");
+ exit(-1);
}
+}
- /* Set DABR_TRANSLATION bit */
- data |= (1UL << 2);
-
- /* use PTRACE_SET_DEBUGREG breakpoints */
- set_breakpoint_addr((void *)data);
- ptrace(PTRACE_CONT, child_pid, NULL, 0);
- sprintf(buf, "Test %s watchpoint with len: %d ", mode_str, len);
- check_success(buf);
- /* Unregister hw brkpoint */
- set_breakpoint_addr(NULL);
+static int ptrace_sethwdebug(pid_t child_pid, struct ppc_hw_breakpoint *info)
+{
+ int wh = ptrace(PPC_PTRACE_SETHWDEBUG, child_pid, 0, info);
- data = (data & ~7); /* remove dabr control bits */
+ if (wh <= 0) {
+ perror("PPC_PTRACE_SETHWDEBUG failed");
+ exit(-1);
+ }
+ return wh;
+}
- /* use PPC_PTRACE_SETHWDEBUG breakpoint */
- if (!(dbginfo->features & PPC_DEBUG_FEATURE_DATA_BP_RANGE))
- return; /* not supported */
- wh = set_hwbreakpoint_addr((void *)data, 0);
- ptrace(PTRACE_CONT, child_pid, NULL, 0);
- sprintf(buf, "Test %s watchpoint with len: %d ", mode_str, len);
- check_success(buf);
- /* Unregister hw brkpoint */
- del_hwbreakpoint_addr(wh);
-
- /* try a wider range */
- range = 8;
- if (dawr)
- range = 512 - ((int)data & (DAWR_LENGTH_MAX - 1));
- wh = set_hwbreakpoint_addr((void *)data, range);
- ptrace(PTRACE_CONT, child_pid, NULL, 0);
- sprintf(buf, "Test %s watchpoint with len: %d ", mode_str, len);
- check_success(buf);
- /* Unregister hw brkpoint */
- del_hwbreakpoint_addr(wh);
+static void ptrace_delhwdebug(pid_t child_pid, int wh)
+{
+ if (ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, wh) < 0) {
+ perror("PPC_PTRACE_DELHWDEBUG failed");
+ exit(-1);
+ }
}
-/* Set the breakpoints and check the child successfully trigger them */
-static int launch_tests(bool dawr)
+#define DABR_READ_SHIFT 0
+#define DABR_WRITE_SHIFT 1
+#define DABR_TRANSLATION_SHIFT 2
+
+static int test_set_debugreg(pid_t child_pid)
{
- char buf[1024];
- int len, i, status;
+ unsigned long wp_addr = (unsigned long)&glvar;
+ char *name = "PTRACE_SET_DEBUGREG";
+ int len;
+
+ /* PTRACE_SET_DEBUGREG, WO test*/
+ wp_addr &= ~0x7UL;
+ wp_addr |= (1UL << DABR_WRITE_SHIFT);
+ wp_addr |= (1UL << DABR_TRANSLATION_SHIFT);
+ for (len = 1; len <= sizeof(glvar); len <<= 1) {
+ ptrace_set_debugreg(child_pid, wp_addr);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "WO", wp_addr, len);
+ }
- struct ppc_debug_info dbginfo;
+ /* PTRACE_SET_DEBUGREG, RO test */
+ wp_addr &= ~0x7UL;
+ wp_addr |= (1UL << DABR_READ_SHIFT);
+ wp_addr |= (1UL << DABR_TRANSLATION_SHIFT);
+ for (len = 1; len <= sizeof(glvar); len <<= 1) {
+ ptrace_set_debugreg(child_pid, wp_addr);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RO", wp_addr, len);
+ }
- i = ptrace(PPC_PTRACE_GETHWDBGINFO, child_pid, NULL, &dbginfo);
- if (i) {
- perror("Can't set breakpoint info\n");
- exit(-1);
+ /* PTRACE_SET_DEBUGREG, RW test */
+ wp_addr &= ~0x7UL;
+ wp_addr |= (1Ul << DABR_READ_SHIFT);
+ wp_addr |= (1UL << DABR_WRITE_SHIFT);
+ wp_addr |= (1UL << DABR_TRANSLATION_SHIFT);
+ for (len = 1; len <= sizeof(glvar); len <<= 1) {
+ ptrace_set_debugreg(child_pid, wp_addr);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
}
- if (!(dbginfo.features & PPC_DEBUG_FEATURE_DATA_BP_RANGE))
- printf("WARNING: Kernel doesn't support PPC_PTRACE_SETHWDEBUG\n");
- /* Write watchpoint */
- for (len = 1; len <= sizeof(long); len <<= 1)
- launch_watchpoints(buf, BP_W, len, &dbginfo, dawr);
+ ptrace_set_debugreg(child_pid, 0);
+ return 0;
+}
- /* Read-Write watchpoint */
- for (len = 1; len <= sizeof(long); len <<= 1)
- launch_watchpoints(buf, BP_RW, len, &dbginfo, dawr);
+static void get_ppc_hw_breakpoint(struct ppc_hw_breakpoint *info, int type,
+ unsigned long addr, int len)
+{
+ info->version = 1;
+ info->trigger_type = type;
+ info->condition_mode = PPC_BREAKPOINT_CONDITION_NONE;
+ info->addr = (__u64)addr;
+ info->addr2 = (__u64)addr + len;
+ info->condition_value = 0;
+ if (!len)
+ info->addr_mode = PPC_BREAKPOINT_MODE_EXACT;
+ else
+ info->addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE;
+}
+static void test_sethwdebug_exact(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info;
+ unsigned long wp_addr = (unsigned long)&glvar;
+ char *name = "PPC_PTRACE_SETHWDEBUG, MODE_EXACT";
+ int len = 1; /* hardcoded in kernel */
+ int wh;
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, WO test */
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr, 0);
+ wh = ptrace_sethwdebug(child_pid, &info);
ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "WO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
- /*
- * Now we have unregistered the breakpoint, access by child
- * should not cause SIGTRAP.
- */
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RO test */
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_READ, wp_addr, 0);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
- wait(&status);
+ /* PPC_PTRACE_SETHWDEBUG, MODE_EXACT, RW test */
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_RW, wp_addr, 0);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+}
- if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
- printf("FAIL: Child process hit the breakpoint, which is not expected\n");
- ptrace(PTRACE_CONT, child_pid, NULL, 0);
- return TEST_FAIL;
- }
+static void test_sethwdebug_range_aligned(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info;
+ unsigned long wp_addr;
+ char *name = "PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED";
+ int len;
+ int wh;
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, WO test */
+ wp_addr = (unsigned long)&gstruct.a;
+ len = A_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "WO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, RO test */
+ wp_addr = (unsigned long)&gstruct.a;
+ len = A_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_READ, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW ALIGNED, RW test */
+ wp_addr = (unsigned long)&gstruct.a;
+ len = A_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_RW, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+}
- if (WIFEXITED(status))
- printf("Child exited normally\n");
+static void test_sethwdebug_range_unaligned(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info;
+ unsigned long wp_addr;
+ char *name = "PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED";
+ int len;
+ int wh;
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, WO test */
+ wp_addr = (unsigned long)&gstruct.b;
+ len = B_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "WO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, RO test */
+ wp_addr = (unsigned long)&gstruct.b;
+ len = B_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_READ, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RO", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, RW test */
+ wp_addr = (unsigned long)&gstruct.b;
+ len = B_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_RW, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
- return TEST_PASS;
+}
+
+static void test_sethwdebug_range_unaligned_dar(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info;
+ unsigned long wp_addr;
+ char *name = "PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, DAR OUTSIDE";
+ int len;
+ int wh;
+
+ /* PPC_PTRACE_SETHWDEBUG, MODE_RANGE, DW UNALIGNED, DAR OUTSIDE, RW test */
+ wp_addr = (unsigned long)&gstruct.b;
+ len = B_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+}
+
+static void test_sethwdebug_dawr_max_range(pid_t child_pid)
+{
+ struct ppc_hw_breakpoint info;
+ unsigned long wp_addr;
+ char *name = "PPC_PTRACE_SETHWDEBUG, DAWR_MAX_LEN";
+ int len;
+ int wh;
+
+ /* PPC_PTRACE_SETHWDEBUG, DAWR_MAX_LEN, RW test */
+ wp_addr = (unsigned long)big_var;
+ len = DAWR_MAX_LEN;
+ get_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_RW, wp_addr, len);
+ wh = ptrace_sethwdebug(child_pid, &info);
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ check_success(child_pid, name, "RW", wp_addr, len);
+ ptrace_delhwdebug(child_pid, wh);
+}
+
+/* Set the breakpoints and check the child successfully trigger them */
+static void
+run_tests(pid_t child_pid, struct ppc_debug_info *dbginfo, bool dawr)
+{
+ test_set_debugreg(child_pid);
+ if (dbginfo->features & PPC_DEBUG_FEATURE_DATA_BP_RANGE) {
+ test_sethwdebug_exact(child_pid);
+ test_sethwdebug_range_aligned(child_pid);
+ if (dawr) {
+ test_sethwdebug_range_unaligned(child_pid);
+ test_sethwdebug_range_unaligned_dar(child_pid);
+ test_sethwdebug_dawr_max_range(child_pid);
+ }
+ }
}
static int ptrace_hwbreak(void)
{
- pid_t pid;
- int ret;
+ pid_t child_pid;
+ struct ppc_debug_info dbginfo;
bool dawr;
- pid = fork();
- if (!pid) {
- trigger_tests();
+ child_pid = fork();
+ if (!child_pid) {
+ test_workload();
return 0;
}
wait(NULL);
- child_pid = pid;
-
- get_dbginfo();
- SKIP_IF(!hwbreak_present());
- dawr = dawr_present();
+ get_dbginfo(child_pid, &dbginfo);
+ SKIP_IF(dbginfo.num_data_bps == 0);
- ret = launch_tests(dawr);
+ dawr = dawr_present(&dbginfo);
+ run_tests(child_pid, &dbginfo, dawr);
+ /* Let the child exit first. */
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
wait(NULL);
- return ret;
+ /*
+ * Testcases exits immediately with -1 on any failure. If
+ * it has reached here, it means all tests were successful.
+ */
+ return TEST_PASS;
}
int main(int argc, char **argv, char **envp)
projects / users / hch / configfs.git / commitdiff