add capacity to set priorities on I/Os + example

[simgrid.git] / src / xbt / memory_map.cpp

diff --git a/src/xbt/memory_map.cpp b/src/xbt/memory_map.cpp
index c81bcfb..fccfac8 100644 (file)
--- a/src/xbt/memory_map.cpp
+++ b/src/xbt/memory_map.cpp
@@ -51,6 +51,20 @@
 
 #include "memory_map.hpp"
 
+// abort with a message if `expr' is false
+#define CHECK(expr)                                                                                                    \
+  if (not(expr)) {                                                                                                     \
+    fprintf(stderr, "CHECK FAILED: %s:%d: %s\n", __FILE__, __LINE__, #expr);                                           \
+    abort();                                                                                                           \
+  } else                                                                                                               \
+    ((void)0)
+
+#define DEBUG_PRINT(...)                                                                                               \
+  if (false) {                                                                                                         \
+    fprintf(stderr, __VA_ARGS__);                                                                                      \
+  } else                                                                                                               \
+    ((void)0)
+
 namespace simgrid {
 namespace xbt {
 
@@ -147,11 +161,9 @@ std::vector<VmMap> get_memory_map(pid_t pid)
     if (dladdr(reinterpret_cast<void*>(address), &dlinfo))
       memreg.pathname = dlinfo.dli_fname;
 
-#if 0 /* debug */
-    std::fprintf(stderr, "Region: %016" PRIx64 "-%016" PRIx64 " | %c%c%c | %s\n", memreg.start_addr, memreg.end_addr,
-              (memreg.prot & PROT_READ) ? 'r' : '-', (memreg.prot & PROT_WRITE) ? 'w' : '-',
-              (memreg.prot & PROT_EXEC) ? 'x' : '-', memreg.pathname.c_str());
-#endif
+    DEBUG_PRINT("Region: %016" PRIx64 "-%016" PRIx64 " | %c%c%c | %s\n", memreg.start_addr, memreg.end_addr,
+                (memreg.prot & PROT_READ) ? 'r' : '-', (memreg.prot & PROT_WRITE) ? 'w' : '-',
+                (memreg.prot & PROT_EXEC) ? 'x' : '-', memreg.pathname.c_str());
 
     ret.push_back(std::move(memreg));
     address += size;
@@ -209,21 +221,17 @@ std::vector<VmMap> get_memory_map(pid_t pid)
     char *endptr;
     memreg.start_addr = std::strtoull(tok, &endptr, 16);
     /* Make sure that the entire string was an hex number */
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     tok = strtok_r(nullptr, "-", &saveptr);
-    if (tok == nullptr)
-      abort();
+    CHECK(tok != nullptr);
 
     memreg.end_addr = std::strtoull(tok, &endptr, 16);
     /* Make sure that the entire string was an hex number */
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     /* Get the permissions flags */
-    if (std::strlen(lfields[1]) < 4)
-      abort();
+    CHECK(std::strlen(lfields[1]) >= 4);
 
     memreg.prot = 0;
     for (i = 0; i < 3; i++){
@@ -259,32 +267,26 @@ std::vector<VmMap> get_memory_map(pid_t pid)
     /* Get the offset value */
     memreg.offset = std::strtoull(lfields[2], &endptr, 16);
     /* Make sure that the entire string was an hex number */
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     /* Get the device major:minor bytes */
     tok = strtok_r(lfields[3], ":", &saveptr);
-    if (tok == nullptr)
-      abort();
+    CHECK(tok != nullptr);
 
     memreg.dev_major = (char) strtoul(tok, &endptr, 16);
     /* Make sure that the entire string was an hex number */
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     tok = strtok_r(nullptr, ":", &saveptr);
-    if (tok == nullptr)
-      abort();
+    CHECK(tok != nullptr);
 
     memreg.dev_minor = (char) std::strtoul(tok, &endptr, 16);
     /* Make sure that the entire string was an hex number */
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     /* Get the inode number and make sure that the entire string was a long int */
     memreg.inode = strtoul(lfields[4], &endptr, 10);
-    if (*endptr != '\0')
-      abort();
+    CHECK(*endptr == '\0');
 
     /* And finally get the pathname */
     if (lfields[5])
@@ -292,7 +294,7 @@ std::vector<VmMap> get_memory_map(pid_t pid)
 
     /* Create space for a new map region in the region's array and copy the */
     /* parsed stuff from the temporal memreg variable */
-    // std::fprintf(stderr, "Found region for %s\n", not memreg.pathname.empty() ? memreg.pathname.c_str() : "(null)");
+    DEBUG_PRINT("Found region for \"%s\"\n", memreg.pathname.c_str());
 
     ret.push_back(std::move(memreg));
   }