ip-normalized.c

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// -*-Mode: C++;-*- // technically C99

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//************************* System Include Files ****************************

#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>

//*************************** User Include Files ****************************

#include "ip-normalized.h"
#include <messages/messages.h>

//*************************** Forward Declarations **************************

//***************************************************************************

#define NULL_OR_NAME(v) ((v) ? (v)->name : "(NULL)")

const ip_normalized_t ip_normalized_NULL_lval = ip_normalized_NULL;


ip_normalized_t
hpcrun_normalize_ip(void* unnormalized_ip, load_module_t* lm)
{
  TMSG(NORM_IP, "normalizing %p, w load_module %s", unnormalized_ip, NULL_OR_NAME(lm));
  if (!lm) {
    lm = hpcrun_loadmap_findByAddr(unnormalized_ip, unnormalized_ip);
  }
  
  if (lm && lm->dso_info) {
    ip_normalized_t ip_norm = (ip_normalized_t) {
      .lm_id = lm->id,
      .lm_ip = (uintptr_t)unnormalized_ip - lm->dso_info->start_to_ref_dist };
    return ip_norm;
  }

  TMSG(NORM_IP, "%p not normalizable", unnormalized_ip);
  if (ENABLED(NORM_IP_DBG)){
    EMSG("/proc/maps below");
    char tmp[128];
    snprintf(tmp, sizeof(tmp), "/proc/%u/maps", getpid());
    FILE* loadmap = fopen(tmp, "r");
    char linebuf[1024 + 1];
    for (;;){
      char* l = fgets(linebuf, sizeof(linebuf), loadmap);
      if (feof(loadmap)) {
        break;
      }
      EMSG("  %s", l);
    }
    fclose(loadmap);
  }

  return (ip_normalized_t) {.lm_id = HPCRUN_FMT_LMId_NULL,
                            .lm_ip = (uintptr_t) unnormalized_ip};
}