-/* Copyright (c) 2008-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2023. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "memory_map.hpp"
-namespace simgrid {
-namespace xbt {
+// 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::xbt {
/**
* \todo This function contains many cases that do not allow for a
mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT;
#endif
- kr =
- mach_vm_region(
- map,
- &address,
- &size,
- flavor,
- (vm_region_info_t)&info,
- &info_count,
- &object);
+ kr = mach_vm_region(map, &address, &size, flavor, (vm_region_info_t)&info, &info_count, &object);
if (kr == KERN_INVALID_ADDRESS) {
break;
- }
- else if (kr != KERN_SUCCESS) {
+
+ } else if (kr != KERN_SUCCESS) {
+ const char* name = nullptr;
+ switch (kr) { // https://github.com/apple/darwin-xnu/blob/main/bsd/kern/stackshot.c#L42
+ case KERN_SUCCESS:
+ name = "kr=KERN_SUCCESS";
+ break;
+ case KERN_RESOURCE_SHORTAGE:
+ name = "kr=KERN_RESOURCE_SHORTAGE (ENOMEM)";
+ break;
+ case KERN_INSUFFICIENT_BUFFER_SIZE:
+ name = "kr=KERN_INSUFFICIENT_BUFFER_SIZE (ENOSPC)";
+ break;
+ case KERN_NO_SPACE:
+ name = "kr=KERN_NO_SPACE (ENOSPC)";
+ break;
+ case KERN_NO_ACCESS:
+ name = "kr=KERN_NO_ACCESS (EPERM)";
+ break;
+ case KERN_MEMORY_PRESENT:
+ name = "kr=KERN_MEMORY_PRESENT (EEXIST)";
+ break;
+ case KERN_NOT_SUPPORTED:
+ name = "kr=KERN_NOT_SUPPORTED (ENOTSUP)";
+ break;
+ case KERN_NOT_IN_SET:
+ name = "kr=KERN_NOT_IN_SET (ENOENT)";
+ break;
+ case KERN_ABORTED:
+ name = "kr=KERN_ABORTED (EINTR)";
+ break;
+ case KERN_FAILURE:
+ name = "kr=KERN_FAILURE (EBUSY)";
+ break;
+ case KERN_OPERATION_TIMED_OUT:
+ name = "kr=KERN_OPERATION_TIMED_OUT (ETIMEDOUT)";
+ break;
+ default:
+ name = "kr=default case (EINVAL)";
+ }
std::perror("mach_vm_region failed");
- std::fprintf(stderr, "Cannot request authorization for kernel information access\n");
+ std::fprintf(stderr, "Cannot request authorization for kernel information access (kr=%d ; %s)\n", (int)kr, name);
abort();
}
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;
#elif defined __linux__
/* Open the actual process's proc maps file and create the memory_map_t */
/* to be returned. */
- std::string path = std::string("/proc/") + std::to_string(pid) + "/maps";
+ std::string path = "/proc/" + std::to_string(pid) + "/maps";
std::ifstream fp;
fp.rdbuf()->pubsetbuf(nullptr, 0);
fp.open(path);
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++){
/* 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])
/* 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));
}
return ret;
}
-}
-}
+} // namespace simgrid::xbt
