#define DEFAULT_HALT_TIMEOUT 5000
static int target_read_buffer_default(struct target *target, uint32_t address,
- uint32_t size, uint8_t *buffer);
+ uint32_t count, uint8_t *buffer);
static int target_write_buffer_default(struct target *target, uint32_t address,
- uint32_t size, const uint8_t *buffer);
+ uint32_t count, const uint8_t *buffer);
static int target_array2mem(Jim_Interp *interp, struct target *target,
int argc, Jim_Obj * const *argv);
static int target_mem2array(Jim_Interp *interp, struct target *target,
struct gdb_fileio_info *fileio_info);
static int target_gdb_fileio_end_default(struct target *target, int retcode,
int fileio_errno, bool ctrl_c);
+static int target_profiling_default(struct target *target, uint32_t *samples,
+ uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
/* targets */
extern struct target_type arm7tdmi_target;
return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
}
+int target_profiling(struct target *target, uint32_t *samples,
+ uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
+{
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("target %s is not halted", target->cmd_name);
+ return ERROR_TARGET_NOT_HALTED;
+ }
+ return target->type->profiling(target, samples, max_num_samples,
+ num_samples, seconds);
+}
+
/**
* Reset the @c examined flag for the given target.
* Pure paranoia -- targets are zeroed on allocation.
if (target->type->gdb_fileio_end == NULL)
target->type->gdb_fileio_end = target_gdb_fileio_end_default;
+ if (target->type->profiling == NULL)
+ target->type->profiling = target_profiling_default;
+
return ERROR_OK;
}
return ERROR_OK;
}
+static int target_profiling_default(struct target *target, uint32_t *samples,
+ uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
+{
+ struct timeval timeout, now;
+
+ gettimeofday(&timeout, NULL);
+ timeval_add_time(&timeout, seconds, 0);
+
+ LOG_INFO("Starting profiling. Halting and resuming the"
+ " target as often as we can...");
+
+ uint32_t sample_count = 0;
+ /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
+ struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
+
+ int retval = ERROR_OK;
+ for (;;) {
+ target_poll(target);
+ if (target->state == TARGET_HALTED) {
+ uint32_t t = *((uint32_t *)reg->value);
+ samples[sample_count++] = t;
+ /* current pc, addr = 0, do not handle breakpoints, not debugging */
+ retval = target_resume(target, 1, 0, 0, 0);
+ target_poll(target);
+ alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
+ } else if (target->state == TARGET_RUNNING) {
+ /* We want to quickly sample the PC. */
+ retval = target_halt(target);
+ } else {
+ LOG_INFO("Target not halted or running");
+ retval = ERROR_OK;
+ break;
+ }
+
+ if (retval != ERROR_OK)
+ break;
+
+ gettimeofday(&now, NULL);
+ if ((sample_count >= max_num_samples) ||
+ ((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec))) {
+ LOG_INFO("Profiling completed. %d samples.", sample_count);
+ break;
+ }
+ }
+
+ *num_samples = sample_count;
+ return retval;
+}
+
/* Single aligned words are guaranteed to use 16 or 32 bit access
* mode respectively, otherwise data is handled as quickly as
* possible
return target->type->write_buffer(target, address, size, buffer);
}
-static int target_write_buffer_default(struct target *target, uint32_t address, uint32_t size, const uint8_t *buffer)
+static int target_write_buffer_default(struct target *target, uint32_t address, uint32_t count, const uint8_t *buffer)
{
- int retval = ERROR_OK;
-
- if (((address % 2) == 0) && (size == 2))
- return target_write_memory(target, address, 2, 1, buffer);
-
- /* handle unaligned head bytes */
- if (address % 4) {
- uint32_t unaligned = 4 - (address % 4);
+ uint32_t size;
- if (unaligned > size)
- unaligned = size;
-
- retval = target_write_memory(target, address, 1, unaligned, buffer);
- if (retval != ERROR_OK)
- return retval;
-
- buffer += unaligned;
- address += unaligned;
- size -= unaligned;
- }
-
- /* handle aligned words */
- if (size >= 4) {
- int aligned = size - (size % 4);
-
- retval = target_write_memory(target, address, 4, aligned / 4, buffer);
- if (retval != ERROR_OK)
- return retval;
-
- buffer += aligned;
- address += aligned;
- size -= aligned;
+ /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
+ * will have something to do with the size we leave to it. */
+ for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+ if (address & size) {
+ int retval = target_write_memory(target, address, size, 1, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ address += size;
+ count -= size;
+ buffer += size;
+ }
}
- /* handle tail writes of less than 4 bytes */
- if (size > 0) {
- retval = target_write_memory(target, address, 1, size, buffer);
- if (retval != ERROR_OK)
- return retval;
+ /* Write the data with as large access size as possible. */
+ for (; size > 0; size /= 2) {
+ uint32_t aligned = count - count % size;
+ if (aligned > 0) {
+ int retval = target_write_memory(target, address, size, aligned / size, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ address += aligned;
+ count -= aligned;
+ buffer += aligned;
+ }
}
- return retval;
+ return ERROR_OK;
}
/* Single aligned words are guaranteed to use 16 or 32 bit access
return target->type->read_buffer(target, address, size, buffer);
}
-static int target_read_buffer_default(struct target *target, uint32_t address, uint32_t size, uint8_t *buffer)
+static int target_read_buffer_default(struct target *target, uint32_t address, uint32_t count, uint8_t *buffer)
{
- int retval = ERROR_OK;
-
- if (((address % 2) == 0) && (size == 2))
- return target_read_memory(target, address, 2, 1, buffer);
-
- /* handle unaligned head bytes */
- if (address % 4) {
- uint32_t unaligned = 4 - (address % 4);
-
- if (unaligned > size)
- unaligned = size;
-
- retval = target_read_memory(target, address, 1, unaligned, buffer);
- if (retval != ERROR_OK)
- return retval;
-
- buffer += unaligned;
- address += unaligned;
- size -= unaligned;
- }
-
- /* handle aligned words */
- if (size >= 4) {
- int aligned = size - (size % 4);
+ uint32_t size;
- retval = target_read_memory(target, address, 4, aligned / 4, buffer);
- if (retval != ERROR_OK)
- return retval;
-
- buffer += aligned;
- address += aligned;
- size -= aligned;
+ /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
+ * will have something to do with the size we leave to it. */
+ for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+ if (address & size) {
+ int retval = target_read_memory(target, address, size, 1, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ address += size;
+ count -= size;
+ buffer += size;
+ }
}
- /*prevent byte access when possible (avoid AHB access limitations in some cases)*/
- if (size >= 2) {
- int aligned = size - (size % 2);
- retval = target_read_memory(target, address, 2, aligned / 2, buffer);
- if (retval != ERROR_OK)
- return retval;
-
- buffer += aligned;
- address += aligned;
- size -= aligned;
- }
- /* handle tail writes of less than 4 bytes */
- if (size > 0) {
- retval = target_read_memory(target, address, 1, size, buffer);
- if (retval != ERROR_OK)
- return retval;
+ /* Read the data with as large access size as possible. */
+ for (; size > 0; size /= 2) {
+ uint32_t aligned = count - count % size;
+ if (aligned > 0) {
+ int retval = target_read_memory(target, address, size, aligned / size, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ address += aligned;
+ count -= aligned;
+ buffer += aligned;
+ }
}
return ERROR_OK;
typedef int (*target_write_fn)(struct target *target,
uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
-static int target_write_memory_fast(struct target *target,
- uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer)
-{
- return target_write_buffer(target, address, size * count, buffer);
-}
-
static int target_fill_mem(struct target *target,
uint32_t address,
target_write_fn fn,
CMD_ARGV++;
fn = target_write_phys_memory;
} else
- fn = target_write_memory_fast;
+ fn = target_write_memory;
if ((CMD_ARGC < 2) || (CMD_ARGC > 3))
return ERROR_COMMAND_SYNTAX_ERROR;
writeData(f, s, strlen(s));
}
+typedef unsigned char UNIT[2]; /* unit of profiling */
+
/* Dump a gmon.out histogram file. */
-static void writeGmon(uint32_t *samples, uint32_t sampleNum, const char *filename)
+static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filename,
+ bool with_range, uint32_t start_address, uint32_t end_address)
{
uint32_t i;
FILE *f = fopen(filename, "w");
writeData(f, &zero, 1);
/* figure out bucket size */
- uint32_t min = samples[0];
- uint32_t max = samples[0];
- for (i = 0; i < sampleNum; i++) {
- if (min > samples[i])
- min = samples[i];
- if (max < samples[i])
- max = samples[i];
+ uint32_t min;
+ uint32_t max;
+ if (with_range) {
+ min = start_address;
+ max = end_address;
+ } else {
+ min = samples[0];
+ max = samples[0];
+ for (i = 0; i < sampleNum; i++) {
+ if (min > samples[i])
+ min = samples[i];
+ if (max < samples[i])
+ max = samples[i];
+ }
+
+ /* max should be (largest sample + 1)
+ * Refer to binutils/gprof/hist.c (find_histogram_for_pc) */
+ max++;
}
- int addressSpace = (max - min + 1);
+ int addressSpace = max - min;
assert(addressSpace >= 2);
- static const uint32_t maxBuckets = 16 * 1024; /* maximum buckets. */
- uint32_t length = addressSpace;
- if (length > maxBuckets)
- length = maxBuckets;
- int *buckets = malloc(sizeof(int)*length);
+ /* FIXME: What is the reasonable number of buckets?
+ * The profiling result will be more accurate if there are enough buckets. */
+ static const uint32_t maxBuckets = 128 * 1024; /* maximum buckets. */
+ uint32_t numBuckets = addressSpace / sizeof(UNIT);
+ if (numBuckets > maxBuckets)
+ numBuckets = maxBuckets;
+ int *buckets = malloc(sizeof(int) * numBuckets);
if (buckets == NULL) {
fclose(f);
return;
}
- memset(buckets, 0, sizeof(int) * length);
+ memset(buckets, 0, sizeof(int) * numBuckets);
for (i = 0; i < sampleNum; i++) {
uint32_t address = samples[i];
+
+ if ((address < min) || (max <= address))
+ continue;
+
long long a = address - min;
- long long b = length - 1;
- long long c = addressSpace - 1;
+ long long b = numBuckets;
+ long long c = addressSpace;
int index_t = (a * b) / c; /* danger!!!! int32 overflows */
buckets[index_t]++;
}
/* append binary memory gmon.out &profile_hist_hdr ((char*)&profile_hist_hdr + sizeof(struct gmon_hist_hdr)) */
writeLong(f, min); /* low_pc */
writeLong(f, max); /* high_pc */
- writeLong(f, length); /* # of samples */
+ writeLong(f, numBuckets); /* # of buckets */
writeLong(f, 100); /* KLUDGE! We lie, ca. 100Hz best case. */
writeString(f, "seconds");
for (i = 0; i < (15-strlen("seconds")); i++)
/*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */
- char *data = malloc(2 * length);
+ char *data = malloc(2 * numBuckets);
if (data != NULL) {
- for (i = 0; i < length; i++) {
+ for (i = 0; i < numBuckets; i++) {
int val;
val = buckets[i];
if (val > 65535)
data[i * 2 + 1] = (val >> 8) & 0xff;
}
free(buckets);
- writeData(f, data, length * 2);
+ writeData(f, data, numBuckets * 2);
free(data);
} else
free(buckets);
COMMAND_HANDLER(handle_profile_command)
{
struct target *target = get_current_target(CMD_CTX);
- struct timeval timeout, now;
- gettimeofday(&timeout, NULL);
- if (CMD_ARGC != 2)
+ if ((CMD_ARGC != 2) && (CMD_ARGC != 4))
return ERROR_COMMAND_SYNTAX_ERROR;
- unsigned offset;
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], offset);
- timeval_add_time(&timeout, offset, 0);
+ const uint32_t MAX_PROFILE_SAMPLE_NUM = 10000;
+ uint32_t offset;
+ uint32_t num_of_sampels;
+ int retval = ERROR_OK;
+ uint32_t *samples = malloc(sizeof(uint32_t) * MAX_PROFILE_SAMPLE_NUM);
+ if (samples == NULL) {
+ LOG_ERROR("No memory to store samples.");
+ return ERROR_FAIL;
+ }
+
+ COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], offset);
/**
- * @todo: Some cores let us sample the PC without the
+ * Some cores let us sample the PC without the
* annoying halt/resume step; for example, ARMv7 PCSR.
* Provide a way to use that more efficient mechanism.
*/
+ retval = target_profiling(target, samples, MAX_PROFILE_SAMPLE_NUM,
+ &num_of_sampels, offset);
+ if (retval != ERROR_OK) {
+ free(samples);
+ return retval;
+ }
- command_print(CMD_CTX, "Starting profiling. Halting and resuming the target as often as we can...");
-
- static const int maxSample = 10000;
- uint32_t *samples = malloc(sizeof(uint32_t)*maxSample);
- if (samples == NULL)
- return ERROR_OK;
-
- int numSamples = 0;
- /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
- struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
+ assert(num_of_sampels <= MAX_PROFILE_SAMPLE_NUM);
- int retval = ERROR_OK;
- for (;;) {
- target_poll(target);
- if (target->state == TARGET_HALTED) {
- uint32_t t = *((uint32_t *)reg->value);
- samples[numSamples++] = t;
- /* current pc, addr = 0, do not handle breakpoints, not debugging */
- retval = target_resume(target, 1, 0, 0, 0);
- target_poll(target);
- alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
- } else if (target->state == TARGET_RUNNING) {
- /* We want to quickly sample the PC. */
- retval = target_halt(target);
- if (retval != ERROR_OK) {
- free(samples);
- return retval;
- }
- } else {
- command_print(CMD_CTX, "Target not halted or running");
- retval = ERROR_OK;
- break;
+ retval = target_poll(target);
+ if (retval != ERROR_OK) {
+ free(samples);
+ return retval;
+ }
+ if (target->state == TARGET_RUNNING) {
+ retval = target_halt(target);
+ if (retval != ERROR_OK) {
+ free(samples);
+ return retval;
}
- if (retval != ERROR_OK)
- break;
+ }
- gettimeofday(&now, NULL);
- if ((numSamples >= maxSample) || ((now.tv_sec >= timeout.tv_sec)
- && (now.tv_usec >= timeout.tv_usec))) {
- command_print(CMD_CTX, "Profiling completed. %d samples.", numSamples);
- retval = target_poll(target);
- if (retval != ERROR_OK) {
- free(samples);
- return retval;
- }
- if (target->state == TARGET_HALTED) {
- /* current pc, addr = 0, do not handle
- * breakpoints, not debugging */
- target_resume(target, 1, 0, 0, 0);
- }
- retval = target_poll(target);
- if (retval != ERROR_OK) {
- free(samples);
- return retval;
- }
- writeGmon(samples, numSamples, CMD_ARGV[1]);
- command_print(CMD_CTX, "Wrote %s", CMD_ARGV[1]);
- break;
- }
+ retval = target_poll(target);
+ if (retval != ERROR_OK) {
+ free(samples);
+ return retval;
+ }
+
+ uint32_t start_address = 0;
+ uint32_t end_address = 0;
+ bool with_range = false;
+ if (CMD_ARGC == 4) {
+ with_range = true;
+ COMMAND_PARSE_NUMBER(uint, CMD_ARGV[2], start_address);
+ COMMAND_PARSE_NUMBER(uint, CMD_ARGV[3], end_address);
}
- free(samples);
+ write_gmon(samples, num_of_sampels, CMD_ARGV[1],
+ with_range, start_address, end_address);
+ command_print(CMD_CTX, "Wrote %s", CMD_ARGV[1]);
+
+ free(samples);
return retval;
}
}
target_write_fn fn;
- fn = target_write_memory_fast;
+ fn = target_write_memory;
int e;
if (strcmp(Jim_GetString(argv[1], NULL), "phys") == 0) {
.name = "profile",
.handler = handle_profile_command,
.mode = COMMAND_EXEC,
- .usage = "seconds filename",
+ .usage = "seconds filename [start end]",
.help = "profiling samples the CPU PC",
},
/** @todo don't register virt2phys() unless target supports it */
Code Review / openocd.git / blobdiff