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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team, 1998-2017
*
* Generating cost-centre profiler JSON report
*
* ---------------------------------------------------------------------------*/
#if defined(PROFILING)
#include "PosixSource.h"
#include "Rts.h"
#include "RtsUtils.h"
#include "ProfilerReportJson.h"
#include "Profiling.h"
#include <string.h>
// I don't think this code is all that perf critical.
// So we just allocate a new buffer each time around.
static void escapeString(char const* str, char **buf)
{
char *out;
size_t req_size; //Max required size for decoding.
size_t in_size; //Input size, including zero.
in_size = strlen(str) + 1;
// The strings are generally small and short
// lived so should be ok to just double the size.
req_size = in_size * 2;
out = stgMallocBytes(req_size, "writeCCSReportJson");
*buf = out;
// We provide an outputbuffer twice the size of the input,
// and at worse double the output size. So we can skip
// length checks.
for (; *str != '\0'; str++) {
char c = *str;
if (c == '\\') {
*out = '\\'; out++;
*out = '\\'; out++;
} else if (c == '\n') {
*out = '\\'; out++;
*out = 'n'; out++;
} else {
*out = c; out++;
}
}
*out = '\0';
}
static void
logCostCentres(FILE *prof_file)
{
char* lbl;
char* src_loc;
bool needs_comma = false;
fprintf(prof_file, "[\n");
for (CostCentre *cc = CC_LIST; cc != NULL; cc = cc->link) {
escapeString(cc->label, &lbl);
escapeString(cc->srcloc, &src_loc);
fprintf(prof_file,
"%s"
"{\"id\": %" FMT_Int ", "
"\"label\": \"%s\", "
"\"module\": \"%s\", "
"\"src_loc\": \"%s\", "
"\"is_caf\": %s}",
needs_comma ? ", " : "",
cc->ccID, lbl, cc->module, src_loc,
cc->is_caf ? "true" : "false");
needs_comma = true;
}
fprintf(prof_file, "]\n");
stgFree(lbl);
stgFree(src_loc);
}
static void
logCostCentreStack(FILE *prof_file, CostCentreStack const *ccs)
{
fprintf(prof_file,
"{\"id\": %" FMT_Int ", "
"\"entries\": %" FMT_Word64 ", "
"\"alloc\": %" FMT_Word64 ", "
"\"ticks\": %" FMT_Word ", ",
ccs->cc->ccID,
ccs->scc_count,
ccs->mem_alloc * sizeof(W_),
ccs->time_ticks);
bool need_comma = false;
fprintf(prof_file, "\"children\": [");
for (IndexTable *i = ccs->indexTable; i != 0; i = i->next) {
if (!i->back_edge) {
if (need_comma) {
fprintf(prof_file, ",");
}
logCostCentreStack(prof_file, i->ccs);
need_comma = true;
}
}
fprintf(prof_file, "]}\n");
}
void
writeCCSReportJson(FILE *prof_file,
CostCentreStack const *stack,
ProfilerTotals totals)
{
fprintf(prof_file, "{\n\"program\": \"%s\",\n", prog_name);
fprintf(prof_file, "\"arguments\": [");
for (int count = 0; prog_argv[count]; count++) {
char* arg;
escapeString(prog_argv[count], &arg);
fprintf(prof_file, "%s\"%s\"",
count == 0 ? "" : ", ", arg);
stgFree(arg);
}
fprintf(prof_file, "],\n\"rts_arguments\": [");
for (int count = 0; rts_argv[count]; count++) {
char* arg;
escapeString(rts_argv[count], &arg);
fprintf(prof_file, "%s\"%s\"",
count == 0 ? "" : ", ", arg);
stgFree(arg);
}
fprintf(prof_file, "],\n");
fprintf(prof_file, "\"end_time\": \"%s\",\n", time_str());
fprintf(prof_file, "\"initial_capabilities\": %d,\n",
RtsFlags.ParFlags.nCapabilities);
fprintf(prof_file, "\"total_time\": %11.2f,\n",
((double) totals.total_prof_ticks *
(double) RtsFlags.MiscFlags.tickInterval) / (TIME_RESOLUTION * n_capabilities));
fprintf(prof_file, "\"total_ticks\": %lu,\n",
(unsigned long) totals.total_prof_ticks);
fprintf(prof_file, "\"tick_interval\": %d,\n",
(int) TimeToUS(RtsFlags.MiscFlags.tickInterval));
fprintf(prof_file, "\"total_alloc\":%" FMT_Word64 ",\n",
totals.total_alloc * sizeof(W_));
fprintf(prof_file, "\"cost_centres\": ");
logCostCentres(prof_file);
fprintf(prof_file, ",\n\"profile\": ");
logCostCentreStack(prof_file, stack);
fprintf(prof_file, "}\n");
}
#endif /* PROFILING */
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