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Dump process prof on FreeBSD support.

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This commit is contained in:
David CARLIER 2022-08-12 19:53:08 +01:00
parent 36366f3c4c
commit d7e78bc2f7
1 changed files with 50 additions and 1 deletions
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51
src/prof_sys.c
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@ -12,6 +12,11 @@
#include <libunwind.h>
#endif
#ifdef __FreeBSD__
#include <sys/sysctl.h>
#include <sys/user.h>
#endif
#ifdef JEMALLOC_PROF_LIBGCC
/*
* We have a circular dependency -- jemalloc_internal.h tells us if we should
@ -451,7 +456,7 @@ prof_dump_open_maps_impl() {
int mfd;
cassert(config_prof);
#if defined(__FreeBSD__) || defined(__DragonFly__)
#if defined(__DragonFly__)
mfd = prof_open_maps_internal("/proc/curproc/map");
#elif defined(_WIN32)
mfd = -1; // Not implemented
@ -468,15 +473,55 @@ prof_dump_open_maps_impl() {
prof_dump_open_maps_t *JET_MUTABLE prof_dump_open_maps =
prof_dump_open_maps_impl;
#if defined(__linux__)
static ssize_t
prof_dump_read_maps_cb(void *read_cbopaque, void *buf, size_t limit) {
int mfd = *(int *)read_cbopaque;
assert(mfd != -1);
return malloc_read_fd(mfd, buf, limit);
}
#endif
#if defined(__FreeBSD__)
static void
prof_dump_sysctl_maps(buf_writer_t *buf_writer) {
size_t len;
char *p, *start, *end;
int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};
if (sysctl(mib, 4, NULL, &len, NULL, 0) != 0)
return;
len = len * 4 / 3;
start = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
if (start == MAP_FAILED || !start)
return;
p = start;
if (sysctl(mib, 4, start, &len, NULL, 0) != 0)
goto end;
end = start + len;
while (start < end) {
char buffer[PATH_MAX];
struct kinfo_vmentry *entry = (struct kinfo_vmentry *)start;
if (!entry->kve_structsize)
break;
malloc_snprintf(buffer, sizeof(buffer), "%016"FMTu64"-%016"FMTu64": %s\n",
entry->kve_start, entry->kve_end, entry->kve_path);
buf_writer_cb(buf_writer, buffer);
start += entry->kve_structsize;
}
end:
munmap(p, len);
}
#endif
static void
prof_dump_maps(buf_writer_t *buf_writer) {
#if defined(__linux__)
int mfd = prof_dump_open_maps();
if (mfd == -1) {
return;
@ -485,6 +530,10 @@ prof_dump_maps(buf_writer_t *buf_writer) {
buf_writer_cb(buf_writer, "\nMAPPED_LIBRARIES:\n");
buf_writer_pipe(buf_writer, prof_dump_read_maps_cb, &mfd);
close(mfd);
#elif defined(__FreeBSD__)
buf_writer_cb(buf_writer, "\nMAPPED_LIBRARIES:\n");
prof_dump_sysctl_maps(buf_writer);
#endif
}
static bool