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[vm] Print some resource usage and limits when pthread_create fails.

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TEST=ulimit
Bug: https://github.com/flutter/flutter/issues/164591
Change-Id: Ica782d6e9dbf8da3017f6cf65196564bbed40f2f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419988
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
This commit is contained in:
Ryan Macnak
2025-04-02 15:49:11 -07:00
committed by Commit Queue
parent 4463abc509
commit 174acd490d
1 changed files with 38 additions and 4 deletions
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runtime/vm/os_thread_linux.cc
+38 -4
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@@ -8,11 +8,12 @@
#include "vm/os_thread.h"
#include <errno.h> // NOLINT
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/resource.h> // NOLINT
#include <sys/syscall.h> // NOLINT
#include <sys/time.h> // NOLINT
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include "platform/address_sanitizer.h"
#include "platform/assert.h"
@@ -114,6 +115,39 @@ int OSThread::TryStart(const char* name,
pthread_t tid;
result = pthread_create(&tid, &attr, ThreadStart, data);
if (result != 0) {
fprintf(stderr, "pthread_create failed\n");
const char* const kPaths[] = {
"/proc/self/limits",
"/proc/sys/kernel/threads-max",
"/proc/sys/kernel/pid_max",
"/sys/fs/cgroup/user.slice/memory.current",
"/sys/fs/cgroup/user.slice/memory.max",
"/sys/fs/cgroup/user.slice/memory.peak",
"/sys/fs/cgroup/user.slice/pids.current",
"/sys/fs/cgroup/user.slice/pids.max",
"/sys/fs/cgroup/user.slice/pids.peak",
};
for (uintptr_t i = 0; i < ARRAY_SIZE(kPaths); i++) {
const char* path = kPaths[i];
int fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0) {
fprintf(stderr, "%s: Failed to open\n", path);
continue;
}
const intptr_t kBufferSize = 2048;
char buffer[kBufferSize];
memset(buffer, 0, kBufferSize);
ssize_t red = read(fd, buffer, kBufferSize - 1);
close(fd);
if (red < 0) {
fprintf(stderr, "%s: Failed to read\n", path);
continue;
}
fprintf(stderr, "%s: %s\n", path, buffer);
}
}
RETURN_ON_PTHREAD_FAILURE(result);
result = pthread_attr_destroy(&attr);